Bolthole Index

Frederick County, Maryland

Building permits, zoning and land rules in Frederick County, Maryland

44Index Score / 100
#16 of 24 in Maryland

Unincorporated Frederick County, Maryland requires building permits for new homes and applies county zoning and locally amended building codes123. The City of Frederick uses its own building-permit process; septic permits throughout the county come from the Frederick County Health Department45. In unincorporated Frederick County, RV living on a private lot is prohibited; approved RV parks allow stays shorter than 14 consecutive days per site67.

At a glance

Building permit
Required for new homes; county handles building permits except in City of Frederick and Mt. Airy1
Zoning
County zoning applies to unincorporated land; municipal rules may differ28
Septic permits
Required for installation, alteration or repair through the county Health Department59
RV living
Prohibited on private lots under county zoning; approved parks allow fewer than 14 consecutive days per site67
Accessory dwelling
One unit on an eligible single-family lot; over 1,000 square feet requires special-exception review10
Owner-builder
Allowed for a new dwelling if the titled owner builds directly for the owner's own use and files the required affirmation11
Minimum lot size
Varies by zoning district and use12
Private well
Permit required through Environmental Health Services13

Who to call

Building permits

Frederick County Department of Permits and Inspections

Building permit review, plan review, inspections and zoning certificates for areas served by Frederick County

301-600-2313

planning&permits@frederickcountymd.gov

30 N. Market St., Frederick, MD 21701

Zoning

Frederick County Zoning Administration

Zoning certificates, Board of Appeals applications, floodplain regulations and zoning enforcement

301-600-2328

30 N. Market St., Frederick, MD 21701

Septic permits

Frederick County Health Department – Well & Septic Office

Well and septic permitting, site review and septic installation inspection

301-600-1726

350 Montevue Lane, Frederick, MD 21702

Roads & driveways

Frederick County Department of Permits and Inspections (Driveway Permits)

Driveway entrance permits for new construction on county-maintained open-section roads

301-600-2313

30 N. Market St., Frederick, MD 21701

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Off-grid gear

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Do you need a building permit in Frederick County, Maryland?

Frederick County requires building approval for new construction, alterations, changes of use and accessory structures where the county administers building permits1. Unincorporated Frederick County uses the locally amended 2021 International Building Code and International Residential Code3. The City of Frederick issues its own building permits; septic permits remain with the Frederick County Health Department45. In Thurmont and Middletown, town zoning certificates precede county building approval; Woodsboro requires county building permits and town zoning certificates for accessory structures over 150 square feet141516. Qualifying farm buildings housing equipment, crops or livestock are exempt from the county Building Code; habitation, public use and workplaces processing agricultural products do not qualify17. Exempt farm stands may not exceed 600 square feet or serve as habitation, employment or public-use spaces17. The exemption still requires a zoning certificate and separate electrical or plumbing permits for that work; building impervious area of 5,000–7,500 square feet needs Soil Conservation District stormwater-plan approval before application, and larger areas need formal stormwater review18.

Who is the Frederick County building department, and how do you reach it?

The Frederick County Department of Permits and Inspections handles county building permits at 30 N. Market St. in Frederick and can be reached at 301-600-231319. Applications are made through the county permit portal, and a separate application is required for each structure, use or permit type20. Application fees are due at filing; impact fees must be paid before building-permit issuance20. The county publishes fee schedules by permit category and construction type; online card payments add a 2.50% service fee per transaction, while an online check adds $1.49 per transaction21. Frederick County Zoning Administration is at the same address and can be reached at 301-600-2328 for zoning certificates, Board of Appeals matters, floodplain administration and zoning enforcement22.

Does Frederick County have zoning?

Frederick County zoning applies to unincorporated land; Middletown, Woodsboro Burkittsville and Myersville administer town zoning223242526. Mount Airy, mainly in Carroll County but extending into Frederick County, also administers town zoning27. Septic permits remain with the Frederick County Health Department5. The county publishes district boundaries through its zoning atlas and official GIS map28. Minimum lot area, setbacks and maximum height depend on district and use122930. For single-family homes, Resource Conservation requires 10 acres, 300 feet of width and 50-foot yards; Residential One requires 40,000 square feet, 100 feet of width and front/side/rear yards of 40/10/30 feet31. Single-family homes in Resource Conservation, Agricultural and Residential One have a 30-foot maximum height30. Floodplain setbacks are 25 feet from district boundaries or 50 feet from stream banks, whichever is greater; special flood hazard areas require 100 feet from a watercourse’s top of bank32. County zoning sets no minimum dwelling size, although building-code limits may apply33. Ask Zoning Administration to confirm the parcel’s district and floodplain constraints before design22.

How do septic and well permits work in Frederick County?

The Frederick County Health Department's Well & Septic program handles septic permits, installation inspection and site review5. A permit is required to install, alter or repair a septic system, and a new-home applicant using septic must identify a licensed septic installer or master plumber9. The final septic inspection must be complete before use and occupancy approval34. Only about 23.6% of county soils are rated “not limited” for a conventional drain field, so arrange the site evaluation before finalizing a house location35. Private wells also require a permit through Environmental Health Services13. For a new home using an individual well, the well must be drilled and its completion report reviewed before building-permit approval; the foundation must be at least 30 feet from the well36. Public-water and sewer connection requirements depend on the parcel's plan classification and whether adequate lines abut it37.

Can you live in an RV or tiny home on your land in Frederick County?

In unincorporated Frederick County, an RV cannot be used for living or sleeping on a private residential lot; occupancy requires a county-approved RV park67. An occupied RV must have a valid license plate, be ready for highway use and stay fewer than 14 consecutive days on a single site7. Approved campgrounds serve transient recreational, educational or vacation camping; only the resident owner or manager may live there permanently38. Temporary or occasional tent camping is allowed in a qualifying private park in the Resource Conservation district, subject to dimensional standards and access to a 20-foot-wide paved public road; that provision excludes RV campgrounds39.

We could not confirm a tiny-home occupancy rule; ask Frederick County Zoning Administration to classify the proposed unit22. A manufactured home relocated into the county must bear a HUD compliance label40. Eligible single-family lots may have one ADU up to 1,000 square feet; larger units require special-exception review, and detached units must also meet accessory-structure limits10. ADUs require owner occupancy, an additional parking space and an annual statement; short-term rentals are prohibited1041.

Building a home in Frederick County: the steps, in order

  1. Confirm jurisdiction, zoning district, lot dimensions and floodplain status with Zoning Administration before design work822.
  1. Determine whether public water and sewer are required or whether the parcel can use individual systems3742.
  1. Complete well and septic review early; a private well serving a new home must be drilled and reviewed before building-permit approval13.
  1. Submit zoning and building-permit materials through the county process, with a separate application for each permit type20. An owner acting as the contractor must hold title, build directly on that land solely for personal use and complete the county's Affirmation of Landowner form11. A qualifying family farm lot may receive an impact-fee waiver, but the waiver has family-transfer, active-farm, support and repayment conditions43.
  1. For an entrance on a county-maintained open-section road, include the driveway permit and recorded plat; the apron must pass inspection before occupancy approval44. A driveway in state right-of-way instead requires coordination with the applicable state highway district office45.
  1. Complete every required inspection and obtain use and occupancy approval before moving in4647.

What should you check before buying land in Frederick County?

Start with zoning, minimum lot area, subdivision history and the parcel's water-and-sewer classification; each can change what and where you may build124837. Check driveway jurisdiction as well: county-maintained open-section roads and state highway rights-of-way follow different access processes4445. Ask Zoning Administration about mapped floodplain constraints because Maryland requires local permits for mapped-floodplain development and some work also needs state approval4922. For budgeting context, county farmland averages about $11,000 per acre, the typical home value is about $509,006, and the median annual property-tax bill is about $4,463505152.

Watch-outs

  • The county building-permit process excludes the City of Frederick and Mt. Airy; confirm jurisdiction with the Frederick County Department of Permits and Inspections before applying119.
  • An RV cannot serve as housing while you build on a private lot in unincorporated Frederick County; approved RV parks allow fewer than 14 consecutive days on a single site67.
  • An agricultural building-code exemption still requires a zoning certificate and separate electrical or plumbing permits for that work18.
  • An owner-builder must build directly for personal use without a construction or supervision contract; modular dwellings do not qualify, and hiring a builder later requires notice to the building permit office11.
  • A private well or septic system may be disallowed where adequate public lines abut a parcel in specified service classifications37.

Sources

  1. Building Permits and Zoning Certificates, quoted and re-checked
  2. Chapter 1-19: Zoning, quoted and re-checked
  3. frederickcountymd.gov, quoted and re-checked
  4. Frederick: Land Management Code, Article 3—Procedures (Frederick County), quoted and re-checked
  5. Well & Septic, quoted and re-checked
  6. Chapter 1-19 Zoning, quoted and re-checked
  7. codelibrary.amlegal.com, quoted and re-checked
  8. Chapter 1-19: Zoning, quoted and re-checked
  9. Frequently Asked Questions - Environmental Health - Well & Septic, quoted and re-checked
  10. Affidavit for Accessory Dwelling Units Not Exceeding 1000 Square Feet, quoted and re-checked
  11. Accessory Dwelling Unit Information, quoted and re-checked
  12. § 1-19-6.100. Design Requirements for Specific Districts, quoted and re-checked
  13. Well Permit, quoted and re-checked
  14. Town of Thurmont: Building Permits and Zoning Certificates (Frederick County), quoted and re-checked
  15. Town of Middletown: Zoning Certificate/Building Permit Process (Frederick County), quoted and re-checked
  16. Town of Woodsboro: Sec. 58-98. - Accessory structures and uses (Frederick County), quoted and re-checked
  17. Zoning Certificate Information for Agricultural Buildings and Farm Stands, quoted and re-checked
  18. Zoning Certificate Information for Agricultural Buildings and Farm Stands, quoted and re-checked
  19. Frederick County Department of Permits and Inspections (frederickcountymd.gov)
  20. Building Permits and Zoning Certificates, quoted and re-checked
  21. Permitting Fees, quoted and re-checked
  22. Frederick County Zoning Administration (frederickcountymd.gov)
  23. Town of Middletown: Zoning Certificate/Building Permit Process (Frederick County), quoted and re-checked
  24. Town of Woodsboro: Woodsboro Code of Ordinances, § 58-129, Establishment of districts (Frederick County), quoted and re-checked
  25. Town of Burkittsville: official source (Frederick County), quoted and re-checked
  26. Town of Myersville: Chapter 165 Zoning - Town of Myersville, MD (Frederick County), quoted and re-checked
  27. Town of Mount Airy: Town of Mount Airy, MD, Chapter 112, Article II: General Regulations (Frederick County), quoted and re-checked
  28. Zoning, quoted and re-checked
  29. § 1-19-6.100. Design Requirements for Specific Districts, quoted and re-checked
  30. § 1-19-6.100. Design Requirements for Specific Districts, quoted and re-checked
  31. § 1-19-6.100. Design Requirements for Specific Districts, quoted and re-checked
  32. § 1-19-9.110. Activities Within Floodplain District, quoted and re-checked
  33. Frederick County Planning Commission Discussion Items, quoted and re-checked
  34. Building Permit Approval, quoted and re-checked
  35. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  36. Frederick County Health Department – Well & Septic Office (health.frederickcountymd.gov)
  37. Frederick County Water & Sewerage Plan, quoted and re-checked
  38. Chapter 1-19 Zoning, quoted and re-checked
  39. codelibrary.amlegal.com, quoted and re-checked
  40. frederickcountymd.gov, quoted and re-checked
  41. Chapter 1-19: Zoning, quoted and re-checked
  42. Frederick County Water & Sewerage Plan, quoted and re-checked
  43. Family Farm Impact Fee Waiver/Exemption, quoted and re-checked
  44. Building Single Family Dwelling Packet, quoted and re-checked
  45. Access Management/Permits - MDOT SHA (Maryland statewide rule), quoted and re-checked
  46. Your Permit: Overview from Submittal to Completion, quoted and re-checked
  47. Certificates of Occupancy, quoted and re-checked
  48. frederickcountymd.gov, quoted and re-checked
  49. Floodplain Permitting in Maryland (Maryland statewide rule), quoted and re-checked
  50. Farmland value per acre (USDA census): Bolthole Index county data
  51. Typical home value (Zillow): Bolthole Index county data
  52. Median property tax bill: Bolthole Index county data

Written October 12, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like all 6 of its neighbors, Frederick County requires a building permit for a home.

RuleFrederick CountyWashington CountyMontgomery CountyCarroll CountyHoward CountyBaltimore CountyBaltimore City
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Health Dept.County Health Dept.County Dept. of Permitting ServicesCounty Health Dept.County Health Dept.County Ground Water ManagementMD Dept. of the Env.

County locator

Frederick County in Maryland

44
County map
Frederick County highlighted among the Maryland counties · colored by Index score

How Frederick County scores

Seclusion15100% ev.
Self-Sufficiency72100% ev.
Admin Boringness42100% ev.
Durability83100% ev.
Property Autonomy43100% ev.
Carry Cost48100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$509kTypical home
1%Property tax
$11,000Land / acre
44.6"Annual rain
0.9% of yrsSevere drought
4.7 / yr (+4.5)Mid-century 100°F days
12.6 daysMid-century dry spell
1.94" (+9.8%)Mid-century 1-day rain
1.5×Wildfire change factor
100%Forward climate coverage
$1,370Home insurance / yr
2.6% / yrInsurance growth
0.52%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
198,836People within 30 min
11,911,488People within 2 hr
284,924Radius comparison (15 mi)
444.1People / sq mi
2.9%Federal land
79.1%Land at 15% slope or less
23.6%Soils rated "not limited" for septic (strict USDA rating)
98,482 acWorkable land screen
45.4%Wooded land
87.7 tonsBiomass / forest ac
54°FAvg temp

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Cities and towns in Frederick County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Brunswick · Town of Emmitsburg · Town of Myersville · Town of New Market · Village of Rosemont

Answers from the rulebook for Frederick County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Frederick County rules

  • Building permitRequired

    New construction, modifications, alterations, changes of use, and accessory structures in Frederick County areas where the County Department of Permits and Inspections administers building permits.

    • Approval is required for all new construction in the county or municipalities except the City of Frederick and Mt. Airy.
    • The City of Frederick and Mt. Airy are responsible for their own building permits.
    • Approval is also required for modifications, alterations, changing the usage of any building or structure, and accessory structures such as sheds, pools, decks, garages, and signs.
    • Applications must be made through the County permitting portal.
    “Approval is required for all new construction in the county or in the municipalities, with the exception of the City of Frederick and Mt. Airy.”
  • Owner-builder exemptionConditional

    A property owner seeking a building permit for a new dwelling in Frederick County and acting as the owner’s own contractor.

    • The owner must have title to the property and be seeking a building permit for that land.
    • Construction must be performed directly by the owner on the owner’s own land solely for the owner’s own use.
    • The owner must not have entered into an agreement or contract with a person or company to construct the dwelling or to manage, oversee, or supervise construction.
    • The owner must complete an Affirmation of Landowner form.
    • The owner may not use this process for a modular dwelling permit because the owner does not affix the dwelling to the foundation.
    • If the owner later enters into a contract with a builder, the owner must notify the building permit office so the builder’s registration status can be determined; if registered, the builder’s name and registration number must be added to the permit, and the builder may not perform work until that information has been added.
    • The county identifies registration requirements for construction of a new or replacement home for someone other than the owner, duplexes, townhouses, condominium buildings, mobile homes, and modular dwellings attached to foundations.
    • The owner may be deemed to have violated the Home Builder Registration Act if the owner enters into a sale contract under circumstances indicating that the owner never intended to use the completed home as the owner’s own.
    • The owner’s affirmation is certified under personal knowledge and under penalty of perjury.
    • The Maryland Home Builder Registration Act took effect January 1, 2001.
    “The Act does permit a landowner to obtain a building permit for construction to be performed directly by the landowner solely for the landowner’s own use.”
  • Building code adoptedAdopted (with conditions)

    County-administered building-code requirements for new permit applications in unincorporated Frederick County, Maryland.

    • The County Council approved updates to the Building, Plumbing, and Electrical codes on May 21, 2024.
    • The updated building codes are effective for new permit applications submitted as of July 20, 2024.
    • The City of Frederick and Mt. Airy are exceptions to the county approval process and are responsible for their own building permits.
    • The adopted county building code includes the 2021 ICC Building Code (IBC) with amendments and the 2021 ICC Residential Code (IRC) with amendments.
    • Related county code schedules listed on the official page include the 2023 NEC, 2021 ICC Plumbing Code with amendments, 2021 ICC Fuel Gas Code with amendments, 2021 ICC Mechanical Code as referenced by the 2021 IBC, 2024 NFPA 1 and NFPA 101 with amendments, the 2021 ICC Energy Conservation Code, and the Maryland Building Rehabilitation Code.

    effective date: 2024-07-20 (For new permit applications submitted as of this date)

    “The County Council approved updates to the Building, Plumbing, and Electrical codes on May 21, 2024. The new building, plumbing, and electrical codes will be effective for all new permit applications submitted as of July 20, 2024. For more information on the updated codes, please see below.”
  • InspectionsRequired

    Permits administered by Frederick County, including residential and non-residential building permits.

    • Every permit requires inspections to be closed out.
    • The types of inspections depend on the project scope.
    • All permits require a final inspection for closure.
    • Failure to complete inspections can leave the permit open and may result in a violation for work completed without required inspections.
    • Inspection requests are submitted through the County citizen portal.
    • The County inspection procedures state that final building, electrical, and plumbing inspections may be coordinated for residential combination inspections.
    “All permits require a Final Inspection to be closed. If a Final Inspection was not completed, then your permit will remain open on your property.”
  • Certificate of occupancyRequired

    Use and occupancy of structures covered by Frederick County building permits.

    • Approval is required before use and occupancy.
    • All required final inspections for the building permit and related permits must be requested and approved.
    • There is no additional application or fee unless a temporary Certificate of Occupancy is requested for a non-residential permit.
    • For properties outside a municipality, the certificate is automatically issued and mailed after necessary final inspections are approved.
    • For properties within a municipality, Frederick County approval is forwarded electronically to the municipality for final approval and issuance.
    • The approval has no time limitation as long as the use does not change.
    “Approval is required prior to use and occupancy. Request all required final inspections for the Building Permit and related permits.”
  • County-wide zoningPresent (with conditions)

    Frederick County Zoning Ordinance on unincorporated lands within Frederick County.

    • Applies to all unincorporated lands within the county.
    • Excludes properties and structures owned or used by the United States government and/or the State of Maryland.
    • The ordinance includes the regulatory text and Official Zoning Map.
    • Municipal zoning rules may apply within incorporated municipalities.
    “The provisions of this chapter shall apply to all unincorporated lands within the territorial limits of the county, excluding properties and structures owned or used by the United States government and/or the state.”
  • Local zoningVaries (with conditions)

    Aggregate zoning coverage across Frederick County, including the county zoning ordinance for unincorporated areas and separate municipal zoning or permitting within incorporated municipalities.

    • The county zoning ordinance applies to unincorporated lands.
    • The county page states that the City of Frederick and Mt. Airy are responsible for their own building permits.
    • For properties within municipalities, zoning certificates must be applied for before a building permit application at the Department of Permits and Inspections.
    • This aggregate claim does not assert that Frederick County administers each municipal zoning ordinance.
    “Approval is required for all new construction in the county or in the municipalities, with the exception of the City of Frederick and Mt. Airy. The City of Frederick and Mt. Airy are responsible for their own building permits. Zoning certificates for properties within municipalities must be applied for prior to Building Permit application at the Department of Permits and Inspections.”
  • Zoning districtsPublished

    Frederick County zoning designations published through the county zoning page, zoning atlas, zoning ordinance, and official GIS zoning map service.

    • The county zoning page directs users to detailed zoning maps organized by Maryland tax map grid and to the county zoning ordinance.
    • The official GIS service lists county zoning layers including Agricultural, Resource Conservation, Open Space Recreation, multiple residential districts, Planned Unit Development, Village Center, Highway Services, commercial, industrial, mixed-use, mineral mining, and institutional districts.
    • Municipal zoning is represented separately in the county's zoning GIS services and municipal rules may apply within incorporated municipalities.
    “A - Agricultural RC - Resource Conservation OSR - Open Space Recreation R1 - Low Density Residential”
  • Minimum dwelling sizeNone (with conditions)

    Dwelling units regulated by the Frederick County Zoning Ordinance in unincorporated Frederick County.

    • The official Planning Commission material states that the Zoning Ordinance has no minimum dwelling-unit size.
    • The same official material states that the building code may limit the minimum size of a dwelling unit.
    • Separate zoning-certificate and building-permit approval is required before construction or placement.
    • Other district requirements, lot standards, health, septic, and building-code requirements still apply.
    “Lastly, although the building code may limit the minimum size of a dwelling unit, there are no existing provisions in the Zoning Ordinance that set a minimum size for a dwelling unit.”
  • Minimum lot sizeDistrict specific (with conditions)

    Permitted uses in Frederick County zoning districts, with district- and use-specific minimum lot area requirements.

    • The table states that minimum lot area and yard requirements do not apply to agricultural activity involving no structures.
    • Design requirements for uses permitted by special exception are established in §§ 1-19-8.320 et seq.
    • Lot area, width, and yard measurements may be modified under §§ 1-19-8.620 through 1-19-8.620.6 for specified residential zones and under § 1-19-7.520 for the MX District.

    RC single-family minimum lot area: 10 acres acres · A single-family minimum lot area: See § 1-19-7.300 · R1 single-family minimum lot area: 40000 sq ft · R3 single-family minimum lot area: 12000 sq ft · R5 single-family minimum lot area: 8000 sq ft · R8 single-family minimum lot area: 6000 sq ft

    “Minimum Lot Area | Minimum Lot Area per Unit”
  • SetbacksDistrict specific (with conditions)

    Yard setbacks for permitted uses under Frederick County Chapter 1-19 zoning district regulations; exact setbacks depend on zoning district and use classification.

    • The ordinance states that minimum lot areas are measured in acres and square feet and minimum lot width, yard areas, and height are measured in feet.
    • Minimum lot area and yard requirements do not apply to agricultural activity involving no structures.
    • Design requirements for uses permitted by special exception are established in §§ 1-19-8.320 et seq.
    • Lot area, width, and yard measurements may be modified under §§ 1-19-8.620 through 1-19-8.620.6 for specified residential zones and under § 1-19-7.520 for the MX District.
    • The cited R1 single-family entry is an example of district-specific standards and is not a countywide setback.

    R1 single-family front yard: 40 feet · R1 single-family side yard: 10 feet · R1 single-family rear yard: 30 feet · R1 single-family minimum lot area: 40000 square feet · R1 single-family minimum lot width: 100 feet

    “Residential One District R1 [...] Single family 40,000 40,000 100 40 10 30 30' [...] Residential Three District R3 [...] Single family 12,000 12,000 80 30 10 30 30'”
    2 more reviewed findings on this topic
    • District specific (with conditions) — Permitted residential uses in Frederick County zoning districts RC, A, R1, R3, R5, R8, R12, and R16.
      “Use Classification | Minimum Lot Area | Minimum Lot Area per Unit | Lot Width | Front Yard | Side Yard | Rear Yard | Height [...] Resource Conservation District RC [...] Single family | 10 acres | 10 acres | 300 | 50 | 50 | 50 | 30' [...] Residential One District R1 [...] Single family | 40,000 | 40,000 | 100 | 40 | 10 | 30 | 30' [...] Residential Three District R3 [...] Single family | 12,000 | 12,000 | 80 | 30 | 10 | 30 | 30' [...] Residential Five District R5 [...] Single family | 8,000 | 8,000 | 70 | 30 | 8 | 30 | 30' [...] Residential Eight District R8 [...] Single family | 6,000 | 6,000 | 65 | 25 | 8 | 30 | 30' [...] Residential Twelve District R12 [...] Single family | 6,000 | 6,000 | 65 | 25 | 8 | 30 | 30' [...] Residential Sixteen District R16 [...] Single family | 6,000 | 6,000 | 60 | 25 | 8 | 30 | 30'”
    • Specified — Development within Frederick County Floodplain District and along perennial or intermittent streams.
      “A minimum setback of 25 feet shall be provided from all Floodplain district boundaries, except as otherwise approved through the mitigation process described in § 1-19-9.110 (B)(7), or a minimum setback of 50 feet shall be provided from the bank of any perennial or intermittent stream, whichever is greater. In any area designated as a special flood hazard area, the setback must be 100 feet from the top of bank of a watercourse. All setback areas shall be maintained or planted with natural vegetation.”
  • Building heightDistrict specific (with conditions)

    Maximum building height for permitted uses in Frederick County zoning districts.

    • The table's maximum height varies by district and use.
    • Special-exception uses have additional design requirements under §§ 1-19-8.320 et seq.
    • Footnotes include exceptions for equal-to-structure height, Village Center requirements, special self-storage setbacks, and other cited provisions.

    RC single-family maximum height: 30 ft · A single-family maximum height: 30 ft · R1 single-family maximum height: 30 ft · R8 multifamily maximum height: 40 ft · R12 multifamily maximum height: 100 ft · MX single-family maximum height: 40 ft

    “Table II is § 1-19-6.100 of this Code and sets out the minimum lot area, frontage, yards and the maximum building height allowed for permitted uses in each zoning district.”
  • Living in an RVLimited

    Occupancy of recreational vehicles in unincorporated Frederick County.

    • The county definition limits occupancy to an RV park approved by the county.
    • The recreational vehicle must be built on a single chassis, be 400 square feet or less at the longest horizontal projection, and be self-propelled or towable.
    • The vehicle must have a current valid license plate and be ready for highway use.
    • The vehicle may be occupied for less than 14 consecutive days on a single site.
    • A recreational vehicle campground is a transient-occupancy use for tents, camp trailers, travel trailers, motor homes, or similar movable temporary sleeping quarters.
    • Recreational vehicle campgrounds are provided through the Open Space Recreation floating zoning district in agricultural/rural areas, require a minimum 10-acre tract, and require the applicable floating-zone review and approval process.
    • Campgrounds must provide individual electrical and water outlets, toilet and shower facilities, and sanitary facilities required by the Frederick County Health Department.
    • Maximum campground density is 15 campsites per acre, with at least 3,000 square feet per campsite and a 50-foot property-line setback.
    • Only the resident owner or manager may have permanent residential occupancy at the campground.
    • One acre for every 10 acres of site area must be used for recreation space, excluding required setbacks; campsites must be at least 20 feet apart; utilities must be underground under Maryland Public Service Commission rules.

    maximum RV size: <= 400 square feet (at the longest horizontal projection) · maximum occupancy duration: < 14 consecutive days (on a single site) · minimum campground tract: >= 10 acres (for a recreational vehicle campground) · maximum campground density: <= 15 campsites per acre · minimum campsite area: >= 3000 square feet · minimum campsite property-line setback: >= 50 feet · minimum distance between campsites: >= 20 feet

    “and is only occupied when located in an RV park which is approved by the county.”
    3 more reviewed findings on this topic
    • Prohibited — Occupancy of a recreational vehicle as temporary living quarters on land governed by Frederick County zoning outside incorporated municipalities with separate zoning authority.
      “RECREATIONAL VEHICLE. A vehicle built on a single chassis which is 400 square feet or less at the longest horizontal projection, self-propelled or towable, and designed primarily for temporary living while traveling or camping and is only occupied when located in an RV park which is approved by the county.”
    • Temporary only (with conditions) — Recreational-vehicle occupancy within a county-approved RV park governed by Frederick County zoning.
      “CAMPGROUND, RECREATIONAL VEHICLE. Land for transient occupancy by camping in tents, camp trailers, travel trailers, motor homes, or similar movable temporary sleeping quarters for recreation, educational, or vacation purposes.”
    • Limited — Occupancy of recreational vehicles for temporary living, traveling, or camping in Frederick County.
      “Be occupied for less than 14 consecutive days on a single site.”
  • Camping on your landLimited

    Temporary or occasional tent camping in a private park in the Resource Conservation (RC) District.

    • The use must be in a private park in the RC District.
    • The property must comply with minimum lot area, lot width, yard setback, and height requirements in § 1-19-6.100.
    • The property must have frontage on and access to a 20-foot-wide paved public road.
    • The requirements of § 1-19-7.200 and, where applicable, § 1-19-7.700 must be met.
    • The private park provision does not permit a recreational vehicle campground, golf course, golf driving range, swimming pool, fairground, zoo, hotel, motel, or lodge.

    minimum public-road width: >= 20 feet (paved public road)

    “A private park may include natural or paved trails, scenic viewing areas, parking facilities, forestry activities, tot lots, temporary or occasional tent camping”
  • Manufactured homesLimited

    Manufactured homes designed and built solely for residential purposes or human habitation that are relocated into Frederick County.

    • The manufactured home must bear a HUD label certifying compliance with federal standards.
    • Non-labeled manufactured homes and mobile homes are prohibited from being relocated into Frederick County.
    • The cited provision addresses labeling and relocation; it does not by itself establish a general prohibition on occupancy of a compliant manufactured home already lawfully located in the county.

    HUD label: true (Required for manufactured/mobile homes designed and built solely for residential purposes or human habitation.)

    “All manufactured/mobile homes designed and built solely for residential purposes or human habitation must bear a HUD label certifying compliance with the federal standards. Non-labeled manufactured homes and mobile homes shall be prohibited from being relocated into Frederick County.”
  • Accessory dwellingsLimited

    Limited accessory dwelling units on single-family lots in the RC, A, R1, R3, R5, R8, R12, R16, VC, MXD, PUD, and MX districts on unincorporated land in Frederick County.

    • Only one limited accessory dwelling unit may be created on a lot.
    • The ADU may be within a single-family dwelling, in an accessory structure, or built as a separate accessory structure on a single-family lot.
    • The property owner must reside in the principal dwelling or in the ADU.
    • At least one additional parking space must be provided; on-street parking may satisfy this requirement.
    • The ADU may not exceed 1,000 square feet, excluding decks, porches, patios, or other items that are not part of the primary footprint; an ADU greater than 1,000 square feet must be reviewed as a special exception under § 1-19-8.321.
    • An ADU in an accessory structure or separate accessory structure must comply with § 1-19-8.240(B), including the applicable accessory-structure floor-area and footprint limits and the stated R-1 exception allowing one accessory structure up to 2,000 square feet when the lot is at least 20,000 square feet.
    • Short-term rental of ADUs in the nature of extended-stay hotels, Airbnbs, or seasonal temporary housing is not permitted.
    • The owner of the principal residence must file an annual statement with the Zoning Administrator verifying that the conditions remain unchanged.
    • If ownership changes, the subsequent owner must provide a statement regarding continued use and eligibility.
    • The Zoning Administrator may revoke approval if the ADU does not comply with the listed provisions or applicable safety, health, and environmental standards.
    • The zoning ordinance jurisdiction excludes properties and structures owned or used by the United States government or the State of Maryland.

    maximum ADUs per lot: 1 ADU · maximum ADU size: <= 1000 square feet (Excludes decks, porches, patios, and other items not part of the primary footprint; larger ADUs require special-exception review) · additional parking spaces: >= 1 space (On-street parking may be used) · accessory-structure footprint exception: <= 2000 square feet (One accessory structure on an R-1 property; lot size must equal or exceed 20,000 square feet)

    “The limited accessory dwelling unit shall not exceed 1,000 square feet in size, excluding decks, porches, patios or other items”
    2 more reviewed findings on this topic
    • Allowed (with conditions) — One accessory dwelling unit not exceeding 1,000 square feet on a single-family lot in the RC, A, R1, R3, R5, R8, R12, R16, VC, MXD, PUD, or MX district.
      “The limited accessory dwelling unit shall not exceed 1,000 square feet in size”
    • Allowed (with conditions) — One accessory dwelling unit greater than 1,000 square feet on a single-family lot in the RC, A, R1, R3, R5, R8, R12, R16, VC, MXD, PUD, or MX district, subject to special-exception review.
      “Accessory dwelling units greater than 1,000 square feet shall be allowed in single-family dwellings, in an accessory structure, or built as a separate accessory structure”
  • Who permits septicCounty

    Administration of well and septic services in Frederick County.

    • The Frederick County Health Department Well & Septic program handles permit issuance, septic-system installation inspection, site review, and related environmental-health functions.
    “Inspection of septic system installation”
  • Septic permitRequired

    Septic-system alteration, new installation, or repair in Frederick County.

    • The official FAQ states the permit requirement for altering, installing a new septic system, or repairing a septic system.
    • For new residential construction served by septic, the applicant must provide the name of a licensed septic installer/master plumber at building-permit application; without one, the permit will not be approved.
    • Beginning August 1, 2022, OSDS plans must be developed and submitted for approval by qualified private-sector designers.
    “You need a septic permit when you are altering, installing a new septic system or repairing your septic system in anyway.”
  • Septic inspectionRequired

    Final inspection of septic installations serving new residential construction in Frederick County.

    • A final septic inspection is required before a Use and Occupancy Certificate is issued.
    • The septic installer is responsible for ensuring that the final inspection is completed.
    • The Health Department also conducts preliminary site visits for new-home permits, generally within 10 business days, and may impose a $75 reinspection fee when required staking is missing, incorrect, or not visible.

    reinspection fee: 75 USD (when required staking is missing, incorrect, or not visible)

    “A final septic inspection is required through the Well & Septic Office prior to a Use and Occupancy Certificate being issued.”
  • Off-grid sanitationLimited

    Individual private water and septic systems used instead of public community systems in Frederick County.

    • Individual well and septic systems are allowed in NPS, PS, W-5/Dev., and S-5/Dev. classifications.
    • S-5/W-5 properties are not required to connect to the community system.
    • Where adequate public lines abut certain higher-service classifications, individual systems may not be permitted.
    • Individual systems must comply with State of Maryland and Frederick County Health Department regulations and policies concerning percolation testing, well drilling, water appropriation, and lot size.
    • Interim individual systems may be used when an existing public system is inadequate or unavailable, but the permit must state its interim nature and require connection to a future regional system within one year or less after availability.

    future-system connection deadline: <= 1 year or less (after a future regional community system becomes available)

    “Individual well and septic systems will be allowed”
  • Well permitRequired

    Domestic, geothermal, monitoring, and test wells in Frederick County.

    • Applicants must apply in person to the Frederick County Health Department, Environmental Health Services.
    • The permit fee is listed on the Health Department fee schedule and may be paid in cash, check, or Visa/Mastercard.
    • The applicant must provide property information and choose a licensed well driller.
    • The permit is issued only after Health Department review and approval of required plats or site plans and/or the drilling location.
    • For an individual well serving new residential construction, the well must be drilled and its completion report submitted to and reviewed by the Health Department before building-permit approval.
    “Applicants must complete a well permit application in person at the Frederick County Health Department, Environmental Health Services.”
  • Mandatory utility hookupConditional

    Connection to public water and sewer systems in Frederick County, subject to the parcel’s Water and Sewerage Plan classification.

    • Properties classified S-5/W-5 are not required to connect to the community system.
    • Properties classified S-4/W-4 or S-3/W-3 must connect when public service lines abut the property and adequate capacity exists.
    • Individual private water or septic systems may not be permitted when adequate public water and sewer lines abut property classified W-4 Dev, S-4 Dev, W-3 Dev, S-3 Dev, or W-1/S-1 and the lines are in a public right-of-way or public easement.
    • Individual systems must comply with State of Maryland and Frederick County Health Department regulations and policies.
    “Properties classified S-5/W-5 are not required to connect to the community system.”
  • Agricultural exemptionConditional

    Proposed agricultural buildings and farm stands subject to Frederick County's building-code administration.

    • The construction must qualify under Frederick County local amendment to § 101.2, Exception 4.
    • An agricultural building must be designed and constructed to house farm implements, hay, grain, poultry, livestock, or other horticultural products.
    • The building must not be a place of human habitation.
    • The building must not be a place of employment where agricultural products are processed, treated, or packaged.
    • The building must not be a place used by the public.
    • A zoning certificate application is required through the county citizen portal.
    • For building impervious area between 5,000 and 7,500 square feet, a Standard Stormwater Management Plan must be submitted and approved by the Soil Conservation District before application.
    • If building impervious area is greater than 7,500 square feet, a formal Standard Stormwater Management review is required.
    • If the structure is used with an agritourism enterprise, a Zoning Verification Application must be submitted concurrently, and issuance of the Zoning Certificate is contingent on the Zoning Verification.
    • Electrical or plumbing work requires separate permits and inspections; the building-code exemption does not exempt the structure from Electrical and Plumbing Code or other codes.
    • The stated application fees are $33 filing, $57 zoning review, $63 building review, and $75 Health Department review; additional fees may apply for stormwater review, a new driveway apron, and septic review.
    • The zoning certificate is non-transferable and non-assignable and is valid for one year; if the use is not established within one year, the applicant must contact the county.

    farm stand maximum area: <= 600 square feet (Farm-stand condition, not the agricultural-building condition.) · stormwater plan threshold: 5,000-7,500 square feet of building impervious area (Soil Conservation District approval required before application.) · formal stormwater review threshold: > 7500 square feet of building impervious area (Formal Standard Stormwater Management review required.) · filing fee: 33 USD · zoning review fee: 57 USD · building review fee: 63 USD · Health Department review fee: 75 USD · zoning certificate validity: 1 year (Use must be established within one year.)

    “This information is intended for a proposed agricultural building, farm stand, or structure that qualifies as EXEMPT FROM THE FREDERICK COUNTY BUILDING CODE, per local amendment to § 101.2, Exception 4: Agricultural Buildings and farm stands. To qualify for exemption from the Building Code, the construction must meet all of the following conditions:”
    2 more reviewed findings on this topic
    • Available (with conditions) — Agricultural buildings and farm stands qualifying for exemption from the Frederick County Building Code.
      “EXEMPT FROM THE FREDERICK COUNTY BUILDING CODE, per local amendment to § 101.2, Exception 4: Agricultural Buildings and farm stands.”
    • Conditional — Frederick County development impact-fee waiver for qualifying farm lots associated with a full-time farmer's parent, sibling, child, or grandchild.
      “Impact fees collected under this chapter may be waived for farm lots if the following conditions are met at the time that the waiver is applied for:”
  • Subdividing landRegulated (with conditions)

    Subdivision of land in Frederick County, including compliance with county and state requirements and county subdivision regulations.

    • Well and septic regulations apply before land may be transferred as a subdivided lot.
    • A subdivision plan must be prepared by a Maryland-licensed surveyor and submitted to the Office of Permitting and Inspections for approval.
    • Agricultural cluster developments may prohibit further subdivision of the remainder unless rezoned or otherwise authorized by county ordinance or regulation.
    “All properties must go through the subdivision regulations set by the Frederick County Office of Permitting and Inspections.”
  • Driveway accessLimited

    New single-family dwelling driveway entrances on open-section roads in Frederick County, particularly county-maintained roads without curb and gutter.

    • The packet states that the driveway entrance apron permit applies to open-section driveway entrances only.
    • A copy of the recorded plat must accompany the permit.
    • The driveway apron must be inspected and approved before issuance of the dwelling Certificate of Occupancy.
    • The packet's fee worksheet states that the driveway permit fee is charged for a new apron on a county-maintained road, open section without curb and gutter only.
    • Properties within incorporated towns do not include the marked county fees and require town paperwork before permit application.

    driveway permit fee: 100 USD (Charged for a new apron on a county-maintained road, open section without curb and gutter only)

    “Driveway Entrance Apron Permit. Open section driveway entrances ONLY. Must include copy of recorded plat.”
  • Permit feesPublished

    Frederick County permitting fees and related fee schedules administered by the Department of Permits and Inspections and Zoning Administration.

    • The county publishes separate fee schedules and worksheets by permit category and construction type.
    • The fee page identifies a fee schedule effective July 1, 2026, an increased impact-fee notice effective July 1, 2026, and an SCD fee increase effective September 1, 2026.
    • Online credit-card and debit-card payments incur a 2.50% service fee per transaction; online-check payments incur a $1.49 service fee per transaction.

    fee schedule effective date: 2026-07-01 · SCD fee increase effective date: 2026-09-01 · credit/debit online payment service fee: per 2.5 percent per transaction · online check payment service fee: per 1.49 USD per transaction

    “Fee Schedule - Effective July 1, 2026 Notice of Increased Impact Fees - Effective July 1, 2026 SCD Fee Increase - Effective September 1, 2026 Change in Timing of Development Impact Assessment”
  • Permit processPublished (with conditions)

    New construction, modifications, alterations, changes of use, and accessory structures in Frederick County and municipalities for which the county issues permits.

    • Approval is required for all new construction in the county or municipalities except the City of Frederick and Mt. Airy, which are responsible for their own building permits.
    • Zoning certificates for properties within municipalities must be applied for before a building permit application at the Department of Permits and Inspections.
    • Applications must be made through the county application portal.
    • Approval is also required for modifications, alterations, changes of building or structure usage, and accessory structures such as sheds, pools, decks, garages, and signs.
    • A separate permit application is required for each structure, use, or permit type.
    • All fees are due at application except impact fees and tap fees when applicable; impact fees must be paid before permit issuance.
    • Plan-review timeframes and outside-agency review timeframes may vary.

    online check payment service fee: per 1.49 USD per transaction · credit/debit payment service fee: per 2.5 percent per transaction

    “Applications and online payments are processed in the portal.”

Maryland rules that apply here

  • Building in a floodplainRequired

    All development in FEMA-mapped 100-year floodplains in Maryland counties, cities, and most towns.

    • Local jurisdictions must issue floodplain permits.
    • Development includes grading, filling, clearing, dredging, extraction, storage, subdivision, and construction or improvement of structures and buildings.
    • All necessary federal, State, and local permits must be obtained before development begins.
    • For construction in wetlands and floodplains, a State permit from MDE's Wetlands and Waterways Program is required.
    • Questions about local requirements must be directed to the local permit office.
    “The NFIP requires local jurisdictions to issue permits for all development in the 100-year floodplain, as depicted on maps issued by FEMA.”
    2 more reviewed findings on this topic
    • Required — Development in FEMA-mapped 100-year floodplains in Maryland, including grading, filling, clearing, dredging, extraction, storage, subdivision, and construction or improvement of structures and buildings.
      “The NFIP requires local jurisdictions to issue permits for all development in the 100-year floodplain, as depicted on maps issued by FEMA.”
    • Limited — New buildings, fill, and development that impedes floodwaters or increases water-surface elevations in Maryland floodways.
      “Ordinances do not allow new buildings or fill in the floodway.”
  • county zoning authorityGeneral

    Maryland counties adopting and enforcing zoning and planning laws, including for unincorporated county territory within the county's jurisdiction.

    • The authority is exercised through local laws and remains subject to other public general law, public local law, and any applicable State-government regulatory authority.
    • The statute states that the State policy is that planning and zoning controls are implemented by local government.
    “A county may enact local laws relating to zoning and planning to protect and promote public safety, health, morals, and welfare, including: [...] It is the policy of the State that planning and zoning controls shall be implemented by local government.”
  • county building authorityLimited

    Maryland counties requiring building permits and adopting or enforcing building codes for residential construction in unincorporated areas.

    • Local Government Article § 13-901 applies to all counties except Anne Arundel County, Baltimore City, Baltimore County, Cecil County, Charles County, Howard County, Prince George’s County, Queen Anne’s County, and Worcester County.
    • Under § 13-901(c), covered county governing bodies may regulate building construction, adopt and enforce building codes, require building permits, impose permit and inspection fees, and inspect buildings and structures.
    • Section 13-902 applies only to Calvert, Caroline, Dorchester, Frederick, Harford, Kent, and Worcester Counties.
    • Under § 13-902(c), a building or housing code generally does not apply to a building on a farm or premises devoted solely to agricultural uses, except that it applies in Calvert County to dwellings on which construction began after July 1, 1979 and in Frederick County to residential buildings or buildings constructed for human habitation regardless of location or auxiliary use.
    • Kent County must adopt a building code and housing code; Calvert, Caroline, Dorchester, Frederick, Harford, and Worcester Counties may adopt them.
    • A building code adopted under § 13-902 must require a building permit before a building is built or improved and include standards for structural safety, fire prevention, lighting, ventilation, and proper access.
    • Later amendments to codes incorporated by reference are not effective in Caroline, Frederick, Harford, Kent, and Worcester Counties until incorporated into the county code.
    • Separate county-specific provisions apply to Cecil, Charles, Queen Anne’s, and St. Mary’s Counties, including the Charles County exemption for farm buildings and other outbuildings costing less than $2,500.
    • The Maryland Building Performance Standards apply statewide to each building or structure for which a building permit application is received by a local jurisdiction on or after August 1, 1995.

    building permit before building is built or improved: true (Required in a building code adopted under Local Government Article § 13-902.) · Charles County farm-building or outbuilding cost exemption: < 2500 USD (The Charles County building code does not apply to farm buildings or other outbuildings costing less than $2,500.) · Maryland Building Performance Standards application date: >= 1995-08-01 (Applies to building permit applications received on or after this date.)

    “This section applies to all counties except: [...] The governing body of a county may: (1) regulate the construction of buildings and signs; (2) adopt a building code; (3) provide for enforcement of the code; (4) require permits for the construction of buildings and signs; (5) impose permit and inspection fees; (6) provide for inspection of buildings and structures;”

Inside cities and towns in Frederick County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

  • Building code adoptedAdopted (with conditions)

    Building permits administered by the City of Frederick within Frederick County, Maryland.

    • Effective January 1, 2026, the 2021 IBC, IRC, and IECC, along with the Maryland Building Performance Standards, apply to permits applied for after December 31, 2025.
    • The City page separately lists 2021 IMC, 2018 IPC and IFGC, 2024 NFPA 58, 2023 NEC with local amendments, and 2024 NFPA 1 and NFPA 101 with local amendments or state-code incorporation.
    • The City of Frederick administers its own building permits rather than the Frederick County process.

    effective date: 2026-01-01 (Applicable to permits applied for after December 31, 2025)

    “Note: Effective January 1, 2026, the 2021 Editions of the IBC (International Building Code), IRC (International Residential Code), and IECC (International Energy Conservation Code), along with the Maryland Building Performance Standards, will be applicable to permits applied for after December 31, 2025. These codes will replace the previously enforced 2015 Editions.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Lot coverage — Lot coverage in Frederick County zoning districts.
  • Tiny homes — Occupancy of a tiny home in Frederick County, Maryland.
  • Short-term rentals — Short-term rental use in Frederick County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Frederick County, Maryland

Is Frederick County a good place to live off-grid or homestead?

Frederick County scores 44/100 on the Bolthole Index, a marginal county profile. Its strengths: a durable current and mid-century hazard profile and workable self-sufficiency basics: 44.6″/yr rainfall and 45.4% wooded land. Watch-outs: about 198,836 people within a 30-minute drive.

Do you need a building permit in Frederick County, Maryland?

Frederick County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Frederick County Health Department - Environmental Health / Well & Septic Office. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Frederick County?

Living in an RV on your own land in Frederick County is limited to specific cases: Occupancy of recreational vehicles in unincorporated Frederick County. The county definition limits occupancy to an RV park approved by the county. The recreational vehicle must be built on a single chassis, be 400 square feet or less at the longest horizontal projection, and be self-propelled or towable. Confirm with the county before relying on it.

How much does land cost in Frederick County, Maryland?

Land in Frederick County runs about $11,000 per acre, based on the latest county data.

What is the water situation in Frederick County?

Frederick County gets about 44.6" of rain a year, with severe drought in roughly 0.9% of years.

How remote is Frederick County?

A representative private-land location has about 198,836 people within a 30-minute drive and 11,911,488 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Frederick compares in Maryland

Compare side-by-side →See all 24 Maryland counties ranked →