Bolthole Index

Baltimore County, Maryland

Building permits, zoning and septic rules in Baltimore County, Maryland

38Index Score / 100
#19 of 24 in Maryland

Baltimore County, Maryland requires a building permit for a new home, and the Department of Permits, Approvals and Inspections (PAI) issues it and enforces the county's building, electrical, plumbing and zoning codes1. Permitted work is inspected during construction and at completion2. Septic permitting is locally administered by Ground Water Management under Maryland rules34.

At a glance

Building permit
Required; the Department of Permits, Approvals and Inspections (PAI) issues it and enforces building, electrical, plumbing and zoning codes1
Zoning
Yes, countywide, on a map the County Council controls and reviews every four years56
Septic
Ground Water Management administers permits locally under Maryland rules; public sewer connection may be required where service is adequate and economically available347
RV living
Not allowed. A recreational vehicle may be stored on a residential lot but may not be lived in or otherwise occupied while stored there8
Wells
A permit from the county Approving Authority is required before drilling any well9
Owner-builder
Maryland's statewide home-improvement exemption covers work you do yourself on your own home, but it does not create a general exemption for new-home construction10
Septic soils
About 17.7% of soils avoid severe limits for a conventional drain field11
Property tax
Effective rate about 1.1%, median bill near $3,645/year1213

Who to call

Building permits

Baltimore County Department of Permits, Approvals and Inspections (PAI)

Building, electrical, plumbing and zoning permits and code enforcement, and oversight of land development and use, for Baltimore County

410-887-3353

111 West Chesapeake Avenue, Towson, MD 21204

Online permits →

Septic permits

Baltimore County Ground Water Management Section

Drinking water well permits, onsite sewage disposal (septic) system permits, and removal of residential underground storage tanks for Baltimore County

410-887-2762

groundwater@baltimorecountymd.gov

111 West Chesapeake Avenue, Room 305, Towson, MD 21204

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

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

Yes. The Department of Permits, Approvals and Inspections (PAI) issues building permits and enforces Baltimore County's building, electrical, plumbing and zoning codes1. Once a permit is issued, the code official inspects the work during construction and at completion; damage or changes to inspected work before occupancy approval require notice and reinspection2. Maryland's owner-performed home-improvement exception does not create a general building-permit exemption for new-home construction or other work, so ask PAI which permits your scope requires10. A written permit signed by the Building Engineer is required before any erecting, constructing, repairing, altering or demolishing, and working without one can bring a $1,000 civil penalty14. The county will not issue a building permit unless sewage and drainage provisions are approved by the Building Engineer and the Director of Environmental Protection and Sustainability, so septic or sewer planning comes first14. Appropriate use and occupancy certificates are also part of the local enforcement system when applicable to the project15. Baltimore County has adopted the 2021 International Building and Residential Codes with local amendments, and its own electrical and plumbing codes replace the model code's versions of those provisions16. Agricultural buildings as the code defines them are excluded from the building-code provisions, but electrical and plumbing permits and other local, state and federal requirements still apply to them16.

Who is the Baltimore County building department, and how do you reach them?

The Department of Permits, Approvals and Inspections (PAI) is at 111 West Chesapeake Avenue, Towson, MD 21204, phone 410-887-335317. PAI is the one-stop office for building, electrical, plumbing and zoning permits, so it's the right first call whether your question is about a permit, an inspection, or whether your lot's zoning allows what you want to build175.

Does Baltimore County have zoning?

Yes, countywide. Properties are governed by the county's official zoning map, and the Baltimore County Council has sole legislative authority to set or change any property's zoning classification518. The Council reviews that map comprehensively every four years and separately considers individual property reclassification requests in between5. Lot size depends on the zone. In the rural R.C.5 zone, a lot under one and one-half acres may not be created, density tops out at 0.5 dwelling per acre, and a principal building must sit at least 50 feet from any lot line other than a street line1920. In the D.R. residential zones, the minimum net lot area per dwelling for qualifying small lots runs from 40,000 square feet in D.R.1 to 6,000 in D.R.5.521. Zoning is also where the county's recreational-vehicle rules live: one RV may be stored on a residential lot under specific setback rules, but it can't be lived in while stored there, and as of Bill 20-25 an RV can't be parked on a public road in a residential zone for more than a 24-hour loading window, with a $250-per-day fine for violations8.

How do septic permits work in Baltimore County?

Baltimore County Ground Water Management administers onsite sewage disposal permits locally under Maryland rules, while the Maryland Department of the Environment coordinates with local authorities34. A permit is required before constructing or altering a septic system, and the system cannot be covered or used until it is inspected and approved2223. If an adequate community sewer is economically available, the approving authority may require connection instead, and a septic proposal must conform to the county water and sewerage plan7. The county now supplies minimum design criteria rather than the full design, so a new or repaired system needs a licensed designer, licensed installer and site plan24. Only about 17.7% of county soils avoid severe limits for a conventional drain field, making early site evaluation especially valuable11.

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

Baltimore County does not allow living in an RV stored on a residential lot; a stored RV must remain licensed, except for a truck camper, and mechanically ready to move8. A portable toilet is not a workaround for occupying a new or changed building: without authorization, a portable unit cannot support that occupancy and cannot be used longer than 3 days in a 60-day period25. Privy plans and location also require approval before a sewage-disposal construction permit is issued25. We could not confirm a rule specifically allowing a tiny home as a standalone residence, so ask PAI about the parcel's zoning, building permit and occupancy requirements before buying land for that use17. For a manufactured home, Maryland law bars a county from prohibiting a new manufactured home in a zone that allows single-family homes, but local zoning, utility-connection, site-preparation and permit rules still apply26.

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

  1. If you plan to divide land, know that a subdivision into three or fewer single-family lots is exempt from the community input meeting and Hearing Officer hearing but still must meet the zoning regulations, and an agricultural subdivision with no new streets is exempt from the development title but not from zoning or septic rules2728.
  2. Check the parcel's classification on Baltimore County's official zoning map before design; the County Council controls property classifications518.
  3. Ask Ground Water Management whether the property must connect to available community sewer or can use septic; if septic is allowed, line up the required licensed designer and installer724.
  4. Obtain the well permit before drilling if the site needs private water9.
  5. Submit the building permit to PAI, along with any electrical and plumbing permits the project requires; sealed plans are generally required, though the building official can waive that when the scope does not need review, and fees follow a schedule the County Administrative Officer sets12930.
  6. Complete required inspections during construction and at completion, and obtain the appropriate use and occupancy certificate when applicable215.
  7. For development in a special flood hazard area, plan for periodic floodplain inspections; an elevated structure or manufactured home needs an elevation certificate before final inspection and occupancy approval3132.

What to check before you buy land in Baltimore County

Septic and sewer: ask Ground Water Management whether community sewer connection is required before paying for a septic design, and remember that only about 17.7% of county soils avoid severe limits for a conventional drain field71124. Wells: a private well needs a permit before drilling starts9. Flood risk: Baltimore County regulates tidal and nontidal floodplains under a county code that keeps a higher protection standard than the state model ordinance33. Permitted development in a special flood hazard area receives periodic compliance inspections, and an elevated structure or manufactured home needs an elevation certificate before final inspection and occupancy approval3132. Access: a driveway entering a Maryland state right-of-way requires coordination with the applicable State Highway Administration district office for a permit34. Taxes: the effective property tax rate is about 1.1%, with a median annual bill near $3,6451213.

Watch-outs

  • You cannot live in an RV stored on a residential lot in Baltimore County, even short-term; the county's zoning rules only allow storage, not occupancy, and enforcement extends to a per-day fine for related public-road parking violations8.
  • Since July 1, 2023, Baltimore County no longer designs septic (OSDS) systems itself; budget for a licensed OSDS designer and installer rather than expecting the county to hand you a design24.
  • A septic system is not automatically available to every parcel: the approving authority may require connection where community sewer is adequate and economically available7.
  • Portable toilets and privies do not create a general off-grid sanitation exemption; portable-unit occupancy and duration are restricted, and privy plans require approval25.
  • Whether a tiny home can be occupied as a standalone residence, and the county's numbers for lot coverage and building height, were not confirmed in the official Baltimore County materials reviewed; lot sizes and setbacks are confirmed only for the R.C.5 and D.R. zones, so check your parcel's exact zone with PAI before you rely on any figure1917.

Sources

  1. Baltimore County Code amendments: Title 2, Buildings (2026 county census)
  2. 2025 Baltimore County Bill 49-24, quoted and re-checked
  3. Baltimore County Ground Water Management (2026 county census)
  4. Wastewater Permits Program, quoted and re-checked
  5. CZMP – Baltimore County Council (2026 county census)
  6. CZMP – Baltimore County Council, quoted and re-checked
  7. regs.maryland.gov, quoted and re-checked
  8. Bill 20-25 — Parking of Recreational Vehicles on Public Roads, quoted and re-checked
  9. Chapter 04 Well Construction, quoted and re-checked
  10. Maryland Business Regulation Article § 8-504 (2026 county census)
  11. 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
  12. Effective property tax rate: Bolthole Index county data
  13. Median property tax bill: Bolthole Index county data
  14. Baltimore County Code amendments: Title 2, Buildings, quoted and re-checked
  15. Maryland Public Safety Article § 12-505, quoted and re-checked
  16. Bill 49-24 — The Building Code of Baltimore County, quoted and re-checked
  17. Baltimore County Department of Permits, Approvals and Inspections (PAI) (baltimorecountymd.gov)
  18. CZMP – Baltimore County Council, quoted and re-checked
  19. Baltimore County Zoning Regulations, § 1A04.3, quoted and re-checked
  20. Baltimore County Zoning Regulations, § 1A04.3, quoted and re-checked
  21. Baltimore County Zoning Regulations, Article 1B, D.R. Zones, quoted and re-checked
  22. .03 On-Site Sewage Disposal Permits, quoted and re-checked
  23. regs.maryland.gov, quoted and re-checked
  24. Baltimore County Ground Water Management Section (baltimorecountymd.gov)
  25. .08 Special Methods of Sewage Collection and Disposal, quoted and re-checked
  26. Maryland Land Use Article § 4-104 (Maryland statewide rule), quoted and re-checked
  27. Limited Exemptions, quoted and re-checked
  28. Limited Exemptions, § 32-4-105, quoted and re-checked
  29. Baltimore County Building Code legislation, Bill 49-24, quoted and re-checked
  30. Baltimore County Code, § 35-2-302, quoted and re-checked
  31. 2025 - Baltimore County - 06-24, quoted and re-checked
  32. 2025 - Baltimore County - 06-24, quoted and re-checked
  33. countycouncilweb.s3.amazonaws.com, quoted and re-checked
  34. Access Management/Permits - MDOT SHA (Maryland statewide rule), quoted and re-checked

Written October 10, 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, Baltimore County requires a building permit for a home.

RuleBaltimore CountyBaltimore CityCarroll CountyHarford CountyHoward CountyKent CountyAnne Arundel County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Ground Water ManagementMD Dept. of the Env.County Health Dept.County Health Dept.County Health Dept.County Health Dept.County Dept. of Health

County locator

Baltimore County in Maryland

38
County map
Baltimore County highlighted among the Maryland counties · colored by Index score

How Baltimore County scores

Seclusion11100% ev.
Self-Sufficiency71100% ev.
Admin Boringness42100% ev.
Durability85100% ev.
Property Autonomy43100% ev.
Carry Cost44100% 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 →

$368kTypical home
1.1%Property tax
$13,587Land / acre
47.5"Annual rain
0.8% of yrsSevere drought
4.9 / yr (+4.6)Mid-century 100°F days
12.5 daysMid-century dry spell
2.31" (+8.2%)Mid-century 1-day rain
1.47×Wildfire change factor
100%Forward climate coverage
$1,752Home insurance / yr
2.1% / yrInsurance growth
0.8%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
1,015,807People within 30 min
16,727,485People within 2 hr
1,074,512Radius comparison (15 mi)
1,411.7People / sq mi
2.2%Federal land
79.8%Land at 15% slope or less
17.7%Soils rated "not limited" for septic (strict USDA rating)
56,715 acWorkable land screen
92.3 tonsBiomass / forest ac
54.8°FAvg temp

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Answers from the rulebook for Baltimore County

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

Baltimore County rules

  • Building permitRequired

    Erecting, constructing, repairing, altering, remodeling, removing, or demolishing a building or structure in Baltimore County.

    • A written permit signed by the Building Engineer must be obtained before the covered work.
    • The requisite permit fee must be paid.
    • The Building Engineer may not issue a permit for construction or erection of a building or structure unless adequate provisions are made for disposing of waste, sewage, and drainage, and the related plans are submitted to and approved by the Building Engineer and the Director of Environmental Protection and Sustainability or the Director's designee.
    • A person who performs covered work without obtaining a permit may be subject to a misdemeanor and a $1,000 civil penalty.

    permit: written permit signed by the Building Engineer · permit fee: requisite fee · civil penalty for work without permit: 1000 USD

    “A person may not erect, construct, repair, alter, remodel, remove, or demolish a building or structure in the county without: (1) Obtaining a written permit signed by the Building Engineer; and (2) Paying the requisite fee for the permit.”
  • Building code adoptedAdopted (with conditions)

    Construction, alteration, addition, repair, removal, demolition, enlargement, replacement, relocation, equipment, use or occupancy, location, and maintenance of buildings and structures and their service equipment in Baltimore County.

    • The 2021 International Building Code, International Residential Code, International Mechanical Code, International Energy Conservation Code, and International Swimming Pool and Spa Code are adopted subject to the bill's additions, amendments, and deletions.
    • Baltimore County electrical and plumbing/gasfitting codes replace specified electrical and plumbing provisions of the adopted model codes.
    • The Baltimore County Livability Code serves as the International Property Management Code, and the Baltimore County Fire Prevention Code serves as the International Fire Code.
    • The code applies to county buildings but does not apply to buildings or portions used exclusively by federal and state government agencies until that use ceases.
    • The code applies except where matters are otherwise provided for in other ordinances or statutes or in rules and regulations authorized under the code.
    • Agricultural buildings as defined in the 2021 International Building Code are excluded from the building-code provisions, but required electrical and plumbing/gasfitting permits and all other applicable local, state, and federal requirements still apply.
    • The act states that, having passed by the affirmative vote of five County Council members, it takes effect 15 days after enactment.

    International Building Code edition: 2021 edition (subject to county amendments, additions, and deletions) · International Residential Code edition: 2021 edition (subject to county amendments, additions, and deletions) · International Mechanical Code edition: 2021 edition (subject to county amendments, additions, and deletions) · International Energy Conservation Code edition: 2021 edition (subject to county amendments, additions, and deletions) · International Swimming Pool and Spa Code edition: 2021 edition (subject to county amendments, additions, and deletions)

    “SECTION 2. AND BE IT FURTHER ENACTED that the International Building Code, 2021 Edition, including Appendices C, F, G, and N, the International Residential Code, 2021 Edition, including Appendices AF, AK, AQ, AR, and AS, the International Mechanical Code, 2021 Edition, the International Energy Conservation Code, 2021 Edition, including Appendix CB, and the International Swimming Pool and Spa Code, 2021 Edition are hereby adopted subject to the additions, amendments, or deletions set forth herein.”
  • InspectionsRequired

    Work for which a Baltimore County building permit has been issued.

    • Inspections occur from time to time during and upon completion of permitted work.
    • The code official may include any or all inspections listed in Section 110 of the International Building Code, Section R109 of the International Residential Code, and Sections C105 and R105 of the International Energy Conservation Code.
    • If an event before issuance of a certificate of occupancy causes change or damage to previously inspected work, the builder must notify the building official and a reinspection is required.
    • The owner must complete other inspections required by the code or requested by the building official.
    “AFTER ISSUING A BUILDING PERMIT, THE CODE OFFICIAL SHALL CONDUCT INSPECTIONS FROM TIME TO TIME DURING AND UPON COMPLETION OF THE WORK FOR WHICH A PERMIT HAS BEEN ISSUED.”
    One more reviewed finding on this topic
    • Limited — Development permitted in Baltimore County special flood hazard areas.
      “THE FLOODPLAIN ADMINISTRATOR SHALL MAKE PERIODIC INSPECTIONS OF DEVELOPMENT PERMITTED IN SPECIAL FLOOD HAZARD AREAS, AT APPROPRIATE TIMES THROUGHOUT THE PERIOD OF CONSTRUCTION IN ORDER TO MONITOR COMPLIANCE.”
  • Certificate of occupancyLimited

    Elevated structures and manufactured homes in Baltimore County special flood hazard areas, including new structures, substantially improved structures, and additions.

    • A final inspection is required before issuance of the certificate of occupancy.
    • The permittee must submit an elevation certificate before final inspection and issuance of the certificate of occupancy.
    • The rule applies to elevated structures and manufactured homes, including new structures and manufactured homes, substantially improved structures and manufactured homes, and additions to structures and manufactured homes.
    “THE PERMITTEE SHALL HAVE AN ELEVATION CERTIFICATE PREPARED AND SUBMITTED PRIOR TO FINAL INSPECTION AND ISSUANCE OF A CERTIFICATE OF OCCUPANCY FOR ELEVATED STRUCTURES AND MANUFACTURED HOMES”
  • County-wide zoningPresent (with conditions)

    Properties governed by Baltimore County's official zoning map and zoning classifications.

    • The official zoning map is adopted by the Baltimore County Council.
    • The County reviews the map comprehensively every four years and considers requests to change individual property classifications.
    • The County Council has sole legislative authority to determine a property's zoning classification.
    “The County’s official zoning map is adopted by the Baltimore County Council.”
  • Local zoningPresent (with conditions)

    Local land-use zoning administered through Baltimore County's official zoning map and County Council zoning classifications.

    • The source identifies Baltimore County as the zoning authority for the official county zoning map.
    • Zoning classification is property-specific and determined legislatively by the County Council.
    • This claim does not establish rules administered by any separate municipality or subordinate authority.
    “The County Council has the sole legislative authority to determine the zoning classification of a property.”
  • Minimum lot sizeSpecified

    Lots created in Baltimore County's R.C.5 Zone.

    • A lot under one and one-half acres may not be created in the R.C.5 Zone.
    • The maximum gross residential density is 0.5 dwelling per acre.
    • Certain pre-September 2, 2003 single lots of record may seek a special hearing to alter the minimum lot-size requirement.
    • The Department of Planning may authorize a smaller lot size per residential unit for specified pre-June 11, 2004 growth-allocation acreage, but never less than one acre per unit, if at least 50 percent of the tract is donated to and accepted by the County for public benefit.
    • Certain existing recorded lots or parcels may be approved under the standards in force at the time of lot recordation.

    minimum lot area: >= 1.5 acres (R.C.5 Zone; subject to stated exceptions) · maximum gross residential density: <= 0.5 dwelling per acre (R.C.5 Zone) · growth-allocation minimum lot size: >= 1 acre per unit (Specified Department of Planning authorization)

    “A lot having an area of less than one and one-half acres may not be created in an R.C.5 Zone. The maximum gross residential density is 0.5 dwelling per acre.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Dwellings on qualifying small lots or tracts in Baltimore County D.R. zones.
      “D.R.1 | 40,000 | 150 | 50 | 20 | 50 | 50 D.R.2 | 20,000 | 100 | 40 | 15 | 40 | 40 D.R.3.5 | 10,000 | 70 | 30 | 10 | 25 | 30 D.R.5.5 | 6,000 | 55 | 25 | 10 | — | 30 D.R.10.5 | 3,000 | 20 | 10 | 10 | — | 50 D.R.16 | 2,500 | 20 | 10 | 25 | — | 30”
  • SetbacksSpecified

    Principal buildings hereafter constructed in Baltimore County's R.C.5 Zone.

    • At least 150 feet from the center line of any collector road or scenic route identified in the Baltimore County Master Plan.
    • At least 100 feet from the center line of any road that leads to or connects with a collector road.
    • At least 75 feet from the center line of any other street or road.
    • At least 50 feet from any lot line other than a street line.
    • A principal building contiguous to an R.C.2 or R.C.7 Zone must be at least 150 feet from the zone line.
    • The rule is subject to the exception in Paragraph 5.

    collector-road or scenic-route setback: 150 feet (Measured from center line) · connecting-road setback: 100 feet (Measured from center line) · other-street-or-road setback: 75 feet (Measured from center line) · non-street lot-line setback: 50 feet · R.C.2 or R.C.7 zone-line setback: 150 feet (For a principal building contiguous to the zone line)

    “Any principal building hereafter constructed in an R.C.5 Zone shall be situated at least 150 feet from the center line of any collector road, or any scenic route identified in the Baltimore County Master Plan, and 100 feet from the center line of any road that leads to or connects with a collector road, and at least 75 feet from the center line of any other street or road, and at least 50 feet from any lot line other than a street line, except as otherwise provided in Paragraph 5 below.”
  • Living in an RVProhibited

    Living in or otherwise occupying a recreational vehicle when stored on a residential lot in Baltimore County; the cited rule also addresses RV storage and public-road parking in residential zones.

    • One recreational vehicle may be stored on a residential lot subject to the cited zoning requirements.
    • Except for a truck camper, the vehicle must have a current license.
    • The vehicle must be mechanically ready to be moved at any time.
    • A recreational vehicle may not be lived in or otherwise occupied when stored on a lot.
    • On a lot occupied by a single-family detached or semi-detached dwelling, one vehicle may be stored 2.5 feet from any rear or side lot line; in a side yard it must be at least eight feet to the rear of a lateral projection of the front foundation line.
    • For an individually owned row or group house, the vehicle must be entirely in the rear yard and 2.5 feet from side or rear lot lines.
    • Multifamily rental or condominium storage areas must be specially designed and screened from adjacent off-site residential uses.
    • Under Bill 20-25, a recreational vehicle may not be parked or stood on a public road, street, or way within a residential zone, except for a 24-hour loading or unloading period; violation is a misdemeanor and carries a $250-per-day fine.
    • The Act takes effect 14 days after enactment.

    residential-lot side/rear setback: 2.5 feet (Single-family detached or semi-detached dwelling lots; row/group houses must be entirely in the rear yard.) · side-yard setback from front foundation projection: >= 8 feet (Single-family detached or semi-detached dwelling lots.) · public-road loading/unloading period: 24 hours (Residential zones and the MD 43 Overlay District.) · public-road violation fine: 250 USD per day

    “Contrary provisions of these regulations notwithstanding, one recreational vehicle may be stored on a residential lot as set forth below. Such vehicle, except a truck camper, shall have a current license, may not be lived in, or otherwise occupied, when stored on a lot and shall be mechanically ready to be moved at any time.”
  • Agricultural exemptionConditional

    Subdivision of land for agricultural purposes in Baltimore County

    • The subdivision must comply with all applicable Baltimore County Zoning Regulations.
    • No new streets may be involved.
    • The exemption is from the cited development title and does not eliminate applicable zoning, environmental, forest-conservation, septic, or other requirements.
    “Subject to compliance with all applicable Baltimore County Zoning Regulations, the subdivision of land for agricultural purposes is exempt from this title if no new streets are involved.”
  • Subdividing landLimited

    Certain Baltimore County residential subdivisions and minor developments of three or fewer lots

    • The source lists exemption from the community input meeting and Hearing Officer hearing for subdivision of land into three or fewer lots for residential single-family dwellings and for a minor development not exceeding three lots.
    • If a lot is served by a panhandle driveway, subdivision into three or fewer residential single-family lots is exempt only from the concept-plan requirements under §§ 32-4-211 through 32-4-217 and county review requirements under §§ 32-4-226 and 32-4-227.
    • All development exempted under the subsection must comply with Subtitles 3, 4, and 5 and all applicable Baltimore County Zoning Regulations.
    • Development in an R.C.6 zone remains subject to Subtitle 2, Part V.

    residential single-family subdivision threshold: <= 3 lots (The listed exemption concerns the community input meeting and Hearing Officer hearing; panhandle lots have narrower exemption coverage.) · minor development threshold: <= 3 lots

    “The subdivision of land into three or fewer lots for residential single-family dwellings;”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Urban residential subdivisions in Baltimore County, including development reviewed by housing type and DR zoning district
      “Except as provided in §§ 32-4-105, 32-4-106, and 32-4-107 of this title, an approved Development Plan is required for a development and a plat is required for a subdivision.”
  • Building in a floodplainLimited

    Development in Baltimore County tidal and nontidal floodplain areas.

    • Baltimore County regulates floodplains through County Code provisions conforming to the Maryland Model Floodplain Ordinance.
    • The rules are intended to comply with the National Flood Insurance Program.
    • The county maintains a higher floodplain-protection standard for tidal and nontidal waters.
    “Bill 6-24 brought Baltimore County into alignment with the model ordinance, while maintaining the higher standard of floodplain protection that has been a hallmark of program implementation in this County for both tidal waters and nontidal waters of the State.”
  • Short-term rentalsLimited

    Residential dwelling units rented through a hosting platform for no more than 30 consecutive days in Baltimore County.

    • A host must obtain a county short-term-rental license before advertising, accepting bookings, or renting.
    • The application fee and renewal fee may not be less than $300.
    • The license expires on the third anniversary of its effective date and may be renewed for an additional three-year term.
    • A license may not be issued to a dwelling with a long-term rental license or to an accessory dwelling unit.
    • Guest limits depend on bedrooms, parking, and septic capacity; maximums are 8 guests for a single-family detached dwelling and 6 guests for a single-family attached or semi-detached dwelling.
    • The rental may not be advertised as private or public event space.
    • At least one guest must be at least 21 years old; the host must maintain at least $1,000,000 liability insurance and be available or onsite within 60 minutes.
    • Hosts must retain electronic guest records for 3 years.
    • Hosts operating before the Act's effective date have 180 days to comply.

    application fee minimum: >= 300 USD · renewal fee minimum: >= 300 USD · license term: 3 years (renewable for an additional three-year term) · maximum guests, single-family detached: <= 8 guests (subject also to bedroom, parking, and septic-capacity limits) · maximum guests, single-family attached or semi-detached: <= 6 guests (subject also to bedroom, parking, and septic-capacity limits) · maximum rental period per same guest: <= 30 consecutive days

    “A HOST MAY NOT ADVERTISE A SHORT-TERM RENTAL ON A HOSTING PLATFORM, ACCEPT A BOOKING TRANSACTION, OR RENT A SHORT-TERM RENTAL TO A GUEST UNLESS THE HOST HAS BEEN ISSUED A LICENSE FOR THE SHORT-TERM RENTAL IN ACCORDANCE WITH THIS SUBTITLE.”
  • Permit feesVariable (with conditions)

    County building-permit fees for erection, construction, repair, alteration, remodeling, removal, or demolition of a building or structure.

    • The County Administrative Officer may establish the fee schedule.
    • The County Administrative Officer may increase or decrease fees when considered necessary and proper.
    “The County Administrative Officer may: (1) Establish a schedule of fees for the issuance of permits for the erection, construction, repair, alteration, remodeling, removal, or demolition of a building or structure in the county; and (2) Increase and decrease the fees when considered necessary and proper.”
  • Permit processPublished (with conditions)

    Building permit submission, review, inspection, and approval process in Baltimore County.

    • Construction documents generally must be prepared by a registered architect or engineer and bear the original signature and seal.
    • The building official may waive sealed-document submission in whole or in part when the work scope does not require that review.
    • A revised site plan is required when a lot is changed from the official plat site plan.
    • Signed and sealed plans and data sheets are required with a change-of-occupancy permit request unless otherwise allowed by applicable code.
    • Inspections occur during and upon completion of permitted work.
    • Other regulatory approvals may be required.
    “AFTER ISSUING A BUILDING PERMIT, THE CODE OFFICIAL SHALL CONDUCT INSPECTIONS FROM TIME TO TIME DURING AND UPON COMPLETION OF THE WORK FOR WHICH A PERMIT HAS BEEN ISSUED.”

Maryland rules that apply here

  • Owner-builder exemptionConditional

    Home-improvement permits for work performed by a property owner in a Maryland county or municipal corporation.

    • The exception applies to a permit for a home improvement performed by a property owner.
    • It does not establish a general exemption from building permits for new-home construction or all construction work.
    • For home improvements not performed by the property owner, the permit must include the license number of a licensed contractor.
    • The statute applies to building and permits departments of counties and municipal corporations.
    “Except for a permit for a home improvement to be performed by a property owner”
    One more reviewed finding on this topic
  • Zoning districtsPartial

    Statewide generalized zoning information published by the Maryland Department of Planning for planning and regional analysis; it is not a substitute for the applicable county or municipal zoning ordinance.

    • Each local jurisdiction is responsible for its own zoning, except certain municipalities that do not exercise planning and zoning authority.
    • Maryland has hundreds of unique local zoning categories.
    • MDP groups generalized zoning into Rural, Residential, and Other, further divided into 11 generalized zoning categories.
    • The generalized categories do not establish the complete regulatory zoning districts or permitted uses for a specific parcel.
    “To aid regional and state-level planning purposes, MDP classified zoning districts under three main groups—Rural, Residential, and Other—which are further broken down into 11 distinct Generalized Zoning Categories.”
  • Manufactured homesAllowed (with conditions)

    Placement and resulting residential use of qualifying manufactured homes in zones that allow single-family residential uses.

    • The manufactured home must meet the Maryland statutory definition and applicable federal safety standards.
    • The home must be converted to real property by attachment to a permanent foundation, identical ownership of the home and parcel, and recording an affidavit of affixation.
    • Local jurisdictions may apply building codes, zoning codes, and other local requirements.
    • The rule does not require local jurisdictions to allow mobile homes on wheels or temporary foundations.
    • Local jurisdictions may require the same historic-district standards applicable to traditional single-family homes.
    “A legislative body may not prohibit the placement of a new manufactured home or modular dwelling in a zone that allows single–family residential uses”
    One more reviewed finding on this topic
    • Limited — Placement of a new manufactured home in a Maryland zoning zone that allows single-family residential uses; this claim does not establish unrestricted statewide occupancy on every parcel.
      “A legislative body may not prohibit the placement of a new manufactured home or modular dwelling in a zone that allows single–family residential uses”
  • Accessory dwellingsLimited

    Accessory dwelling unit development statewide under Maryland Land Use Article Title 4, Subtitle 5.

    • The subtitle applies only to land with a single-family detached dwelling unit as the primary dwelling unit.
    • Each legislative body must adopt a local law authorizing accessory dwelling unit development on or before October 1, 2026.
    • A local law may establish accessory dwelling unit safety standards.
    • A local law may prohibit full or partial conversion of an accessory structure when the only vehicular access is from an alley.
    • Construction must meet public health, safety, and welfare standards, including relevant building codes and adequate public facilities provisions.
    • A local law must exclude the accessory dwelling unit from density calculations and residential-growth limits applicable to the lot, parcel, or tract.
    • A local law may not establish side- or rear-yard setback requirements exceeding existing accessory-structure setback requirements.
    • Additional off-street parking requirements may be established only under the statutory considerations, with a waiver process and a completed parking study.

    local authorization deadline: 2026-10-01 · primary dwelling type: single-family detached dwelling unit · side and rear setback ceiling: <= existing accessory structure setback requirements

    “each legislative body shall adopt a local law authorizing the development of accessory dwelling units in accordance with this section.”
  • Who permits septicMixed

    Statewide onsite sewage disposal administration in Maryland.

    • The Maryland Department of the Environment provides technical assistance and direction for delegated programs.
    • County health departments and local approving authorities implement the delegated onsite sewage disposal programs.
    • The actual permitting authority for a parcel is the applicable local approving authority.
    • State regulations remain applicable statewide.
    “The Onsite Systems Division provides technical assistance and direction to County Health Departments and Local Approving Authorities for the implementation of delegated programs for Onsite Sewage Disposal Systems (OSDS) and individual wells.”
    One more reviewed finding on this topic
    • Mixed — Regulation of individual wells and septic systems in Maryland, including Baltimore County
      “Regulation of individual well and septic systems in conjunction with local health departments.”
  • Septic permitRequired

    Construction or alteration of on-site sewage disposal systems in Baltimore County under Maryland regulations

    • An application must be submitted in the form required by the Approving Authority and include the required site plan, soil evaluations, percolation and other test locations, proposed design, improvements, treatment methods, and well information.
    • Construction or alteration may not proceed without the permit.
    • For facilities using an on-site sewage disposal system and private water supply, both an on-site sewage disposal permit and well construction permit are required before construction or alteration.
    • For facilities using an on-site sewage disposal system and public water supply, an on-site sewage disposal permit is required before construction or alteration.
    • The permit may be denied if a safe and adequate water supply is unavailable or if the system may pollute protected waters.
    • The permit is valid for no more than 2 years from issuance, subject to discretionary renewal and possible additional testing.
    • The project must conform to the approved county water and sewerage plan.

    permit validity: <= 2 years maximum (May be renewed at the discretion of the Approving Authority; additional testing or evaluations may be required.)

    “A person may not construct or attempt to construct an on-site sewage disposal system without first receiving a permit from the Approving Authority.”
    One more reviewed finding on this topic
    • Required — Construction or alteration of an onsite sewage disposal system, and construction or alteration of structures served or to be served by such a system, statewide in Maryland.
      “A person may not construct or attempt to construct an on-site sewage disposal system without first receiving a permit from the Approving Authority.”
  • Septic inspectionRequired

    Any onsite sewage disposal system before it is covered or used statewide in Maryland.

    • Inspection and approval must be by the Approving Authority or a third party approved by the Approving Authority.
    • The Approving Authority may require installation, inspection, and approval before issuance of a building permit when hydrologic or geologic problems exist or construction could adversely impact the system.
    • Property-transfer inspections have separate licensing requirements under COMAR 26.04.12.
    “No part of an on-site sewage disposal system may be covered or used until it has been inspected and approved by the Approving Authority or a third party approved by the Approving Authority.”
    One more reviewed finding on this topic
    • Required — On-site sewage disposal system installation and use in Baltimore County
      “may be covered or used until it has been inspected and approved”
  • Off-grid sanitationLimited

    Portable units, privies, and other special sewage-collection methods used for sanitation in Baltimore County

    • Except as authorized by the Maryland Department of Health, portable units may not facilitate occupation or use of a new building, a modified or expanded existing building, or a change in use.
    • A portable unit may not be used for longer than 3 days within a 60-day period without authorization from the Approving Authority.
    • The Approving Authority may require a permit for a portable unit or privy and may inspect it and require corrective action.
    • Privy location and construction plans must be approved by the Approving Authority before issuance of a sewage-disposal construction permit.
    • Privies must prevent soil contact with fecal matter, fly access, contamination of ground or surface water, insect and rodent access, and odor nuisances.

    portable-unit duration: <= 3 days (Within any 60-day period without authorization from the Approving Authority.)

    “A person may not utilize, operate, or make available a portable unit for longer than 3 days within a 60-day period”
  • Well permitRequired

    Construction of wells in Baltimore County, including private water-supply wells

    • An application must be made on forms provided by the Approving Authority and submitted for review.
    • A well may not be constructed until the Approving Authority issues a permit to drill, except under the emergency procedure in Regulation .06.
    • The permit may be issued only to a person licensed by the State Board of Well Drillers as a master well driller.
    • A separate permit is required for each well, although a cluster may be permitted under one permit.
    • The permit is valid for 12 months and may be extended in 6-month increments upon written request by the well driller.
    • Reworking or repairing an existing well without deepening does not require a well construction permit; deepening may also be exempt in specified circumstances under Regulation .11.

    permit validity: 12 months (May be extended in 6-month increments upon written request by the well driller.)

    “A well may not be constructed until the Approving Authority has issued a permit to drill the well”
    One more reviewed finding on this topic
    • Required — Construction of any well in Maryland, including wells serving private or non-community water supplies.
      “A well construction permit is required for any well that is constructed in the State of Maryland.”
  • Mandatory utility hookupConditional

    Residential and other establishments statewide in Maryland, particularly properties governed by COMAR 26.04.02, concerning use of individual water or sewerage systems and connection to community systems.

    • Except as authorized by the Department, a person may not construct or install an on-site sewage disposal system to serve property already connected to a community sewerage system.
    • If a community sewerage system is adequate and economically available to the building served, the Approving Authority may require connection.
    • An individual water supply or sewerage system may be allowed where a community system is unavailable or not required only if the Department finds the individual system adequate and safe before the community system is scheduled to be available.
    • The individual system must be constructed in the most economical and convenient way to permit future connection, and the person must guarantee connection when the county governing body sets a time, including by posting a bond or making another arrangement the Department considers necessary and adequate.
    • The Secretary may order connection when a public water or sewerage system is directly available and the existing private system is or could become prejudicial to health or the environment.
    “The Approving Authority may require a connection to the community sewerage system.”
    One more reviewed finding on this topic
    • Conditional — Properties in Baltimore County served or potentially served by community sewerage systems
      “the Approving Authority may require a connection to the community sewerage system.”
  • Driveway accessLimited

    Construction or modification of residential driveways within Maryland State right-of-way under MDOT State Highway Administration jurisdiction.

    • The requirement applies within the State right-of-way.
    • The applicant must coordinate with the applicable MDOT SHA district office for obtaining a permit.
    • Local planning and zoning or development review may also apply.
    • The source does not establish a statewide permit requirement for driveways outside State right-of-way.
    “You need a permit for the following activities within the State right of way. For a Commercial/Industrial/Residential Access Permit, see above. Construction or modification of residential driveways”
  • 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;”

Still unanswered

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

  • Minimum dwelling size — Minimum floor area for dwellings in Baltimore County.
  • Lot coverage — Lot coverage in Baltimore County
  • Building height — Building height requirements in unincorporated Baltimore County.
  • Camping on your land — Temporary camping on private land in Baltimore County.
  • Tiny homes — Occupancy of tiny homes on private land in Baltimore 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 Baltimore County, Maryland

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

Baltimore County scores 38/100 on the Bolthole Index, a marginal county profile. Its strengths: a durable current and mid-century hazard profile and strong self-sufficiency basics: 47.5″/yr rainfall with little drought. Watch-outs: little seclusion — roughly 1,015,807 people within a 30-minute drive.

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

Baltimore County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Baltimore County Ground Water Management (Dept. of Environmental Protection and Sustainability). 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 Baltimore County?

Living in an RV on your own land in Baltimore County is prohibited: Living in or otherwise occupying a recreational vehicle when stored on a residential lot in Baltimore County; the cited rule also addresses RV storage and public-road parking in residential zones. One recreational vehicle may be stored on a residential lot subject to the cited zoning requirements. Except for a truck camper, the vehicle must have a current license. Confirm with the county before relying on it.

How much does land cost in Baltimore County, Maryland?

Land in Baltimore County runs about $13,587 per acre, based on the latest county data.

What is the water situation in Baltimore County?

Baltimore County gets about 47.5" of rain a year, with severe drought in roughly 0.8% of years.

How remote is Baltimore County?

A representative private-land location has about 1,015,807 people within a 30-minute drive and 16,727,485 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 Baltimore compares in Maryland

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