Bolthole Index

Cobb County, Georgia

Building permits, zoning and land rules in Cobb County, Georgia

37Index Score / 100
#159 of 159 in Georgia

Unincorporated Cobb County, Georgia requires permits for building, electrical, mechanical, plumbing and gas construction1. Cobb County administers zoning and permit review outside city limits, while cities may run their own zoning and building review23. Cobb & Douglas Public Health handles septic permitting and approval throughout Cobb County4.

At a glance

Building permit
Required for building, electrical, mechanical, plumbing and gas work1
Zoning
Yes; the county zones unincorporated land, while municipalities may administer their own zoning23
Septic permits
County health construction permit, site inspection and final approval required56
Owner-builder
Conditional for an owner-occupied home that will not be sold or rented7
Driveway / road access
Cobb DOT approval required for access to a county road; city roads and state routes are excluded8
Minimum lot size
Varies by zoning district9
Manufactured homes
State installer permit required, plus local zoning and siting rules10

Who to call

Building permits

Cobb County Building Development

Building, electrical, mechanical, plumbing and gas permits, plan review and inspections for unincorporated Cobb County, including owner-builder (homeowner) permits

770-528-2053

residentialpermitreview@cobbcounty.gov

1150 Powder Springs St, Ste 400, Marietta, GA 30064

Planning & zoning

Cobb County Zoning Division

Zoning, variances and land-use advice for the Planning Commission, Board of Zoning Appeals and Board of Commissioners in unincorporated Cobb County

(770) 528-2035

comdev@cobbcounty.gov

1150 Powder Springs St, Ste 400, Marietta, GA 30064

Floodplain permits

Cobb County Stormwater Management Division (SWM)

Floodplain management, FEMA Community Rating System participation and flood-risk information for Cobb County

770-419-6435

stormwater@cobbcounty.gov

Roads & driveways

Cobb County Department of Transportation (Cobb DOT)

Review and approval of new driveways connecting to a Cobb County road (no separate driveway permit exists; approval usually comes through the land-disturbance-permit or final-plat process)

(770) 528-1600

cobbdot@cobbcounty.gov

1890 County Services Parkway, Marietta, GA 30008

Septic permits

Cobb & Douglas Public Health, Environmental Health Division

Septic (onsite sewage) system permitting, site evaluation and inspection for Cobb County

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

Off-grid gear

Going off-grid in Cobb County means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Cobb County, Georgia?

Cobb County requires building, electrical, mechanical, plumbing and gas permits before construction in unincorporated Cobb County1. Georgia’s mandatory construction codes apply statewide, and Cobb County enforces applicable codes for new construction, additions and remodeling in its unincorporated jurisdiction1112. Residential applicants collect documents, calculate fees, submit an application packet, complete review and obtain approval before required inspections13. Cobb County’s published residential schedule uses ICC valuation data and $6 per $1,000 of estimated construction cost for a new complete building, with additional $50 CO/LOC, $15 technology and $100 site-plan review fees14. An owner-builder must own and occupy the home rather than offer it for sale or rent; subcontracted trade work needs separate permits and properly licensed contractors7.

Who issues Cobb County building permits, and how do you reach the office?

Cobb County Building Development handles residential building permits in unincorporated Cobb County; residential questions can go to residentialpermitreview@cobbcounty.gov at 1150 Powder Springs St, Ste 400, Marietta, GA 30064115. Owner-builders must complete a preconstruction consultation with the Chief Building Inspector at 770-528-2053 before approval to act as general contractor15. Commercial building applications and plans start with Cobb County Community Development’s Building Permit office16. In the commercial review process, applicable Cobb County Water System fees must be paid before building-permit issuance17. Roswell, mainly in Fulton County but reaching into Cobb County, issues its own building permits18. Septic permitting for property in Cobb County remains with Cobb & Douglas Public Health Environmental Health4.

Does Cobb County have zoning?

Cobb County’s Zoning Division administers zoning for unincorporated Cobb County and publishes a zoning map, district information, forms and Unified Development Code219. Roswell, a city mainly in Fulton County that reaches into Cobb County, administers its own zoning20. Septic approvals for Cobb County property remain with Cobb & Douglas Public Health Environmental Health4. Minimum residential lot size depends on the parcel’s zoning district9. Reach the Cobb County Zoning Division at (770) 528-203521. We could not confirm complete accessory-dwelling, minimum dwelling-size, setback, lot-coverage or height rules; ask the Zoning Division for the requirements of the parcel’s district.

How do septic permits work in Cobb County?

Cobb & Douglas Public Health Environmental Health handles Cobb County septic applications; the County Board of Health performs the permitting and final-approval functions422. Obtain a health construction permit before physically developing a lot or structure that will use septic or installing a system component; repairs, replacements and additions also require permits and inspections23. Applications include system plans, water-supply information, bedroom or flow data and soil conditions, and approval requires a favorable site inspection24. Do not backfill or use the system before final inspection and written approval6. Current residential inspection/permit fees are $250, and repair or modification review/permit/inspection fees are $170; a new Environmental Health fee schedule takes effect January 1, 202724. About 65.1% of county soils lack severe limitations for conventional drain fields, but the actual site still needs evaluation25.

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

We could not confirm a complete rule allowing long-term RV residence or temporary camping on private land in unincorporated Cobb County; ask the Zoning Division about the parcel’s district and proposed duration. At a Cobb County amusement activity, camping or overnight residence requires a land-use permit, except for a reasonable number of overnight security personnel; that rule addresses amusement activities specifically26. Short-term rentals in unincorporated Cobb County require a proper certificate of occupancy for the main house and cannot use accessory structures or campers27. A site-built or modular tiny home must meet applicable Georgia building codes and receive local siting approval28. Where public or community sewage treatment is unavailable, occupied property must have an approved onsite sewage system sized for expected use29.

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

  1. Confirm whether the parcel is unincorporated or inside a city, then identify the zoning district, minimum lot size and proposed use with the applicable zoning office39.
  2. Before physical development of a septic-served lot, obtain the health construction permit and favorable site inspection2324.
  3. Begin unincorporated subdivision plat review with Community Development Site Plan Review; land-disturbing work needs an LDP unless exempt303113.
  4. Owner-builders must complete the Chief Building Inspector consultation and satisfy owner-occupancy conditions157.
  5. Submit residential building-permit documents, calculate fees and complete application review and approval1314.
  6. Obtain Cobb DOT approval for county-road access and the required floodplain-development permit before regulated work832.
  7. Complete building inspections and obtain septic final written approval before backfilling or use336.

What to check before you buy land in Cobb County

Cobb County has roughly 2,286 residents per square mile, so buyers should expect suburban development pressure34. Before closing, confirm jurisdiction, zoning and whether a proposed land division needs county site-plan review31930. A licensed well contractor must notify the county health department before drilling an individual private well; the available rule does not establish a separate general well permit35. Cobb DOT approval applies to county-road driveways, excluding city roads and state routes8. Ask Stormwater Management about floodplain status: regulated floodplain development requires a permit, and floodway encroachments are generally prohibited, with limited infrastructure exceptions requiring engineering analysis and a no-rise certification32.

Watch-outs

  • New commercial businesses, tenants and buildings in unincorporated Cobb County require a Certificate of Occupancy; a tenant taking over the same approved use may qualify for the Information Change Form process, and customary home occupations are excluded36.
  • A subdivision or mobile-home park cannot move into sale, lease, construction or physical development until the County Board of Health approves its water-supply and sewage-disposal plans37.
  • Bona fide agricultural or timber land can qualify for Georgia's conservation-use assessment at 40% of current-use value, but it requires a 10-year covenant filed with the county tax assessor and does not exempt the land from zoning or building rules38.
  • A licensed well contractor must notify the county health department before drilling, but we could not confirm a separate general permit for an individual private well35.

Sources

  1. Cobb County Code § 18-27 Permits Required (2026 county census)
  2. Zoning Division, quoted and re-checked
  3. Plan Review & Permitting, quoted and re-checked
  4. Septic System Applications And Requirements, quoted and re-checked
  5. Septic System Applications And Requirements, quoted and re-checked
  6. Subject 511-3-1 ON-SITE SEWAGE MANAGEMENT SYSTEMS, quoted and re-checked
  7. Homeowner Permit Request, quoted and re-checked
  8. Transportation Permitting and Approvals, quoted and re-checked
  9. 2026 Comprehensive Plan Amendments, quoted and re-checked
  10. Manufactured Housing (Georgia statewide rule), quoted and re-checked
  11. Mandatory and Permissive State Codes, quoted and re-checked
  12. Residential Permitting, quoted and re-checked
  13. Residential Permitting, quoted and re-checked
  14. New Fee Schedule Effective July 1, 2024, quoted and re-checked
  15. Cobb County Building Development (cobbcounty.gov)
  16. Plan Review and Permitting, quoted and re-checked
  17. assets.cobbcounty.gov, quoted and re-checked
  18. Roswell: Building – Community Development (Cobb County), quoted and re-checked
  19. Zoning Division, quoted and re-checked
  20. Roswell: Unified Development Code & Design Guidelines (Cobb County), quoted and re-checked
  21. Cobb County Zoning Division (cobbcounty.gov)
  22. Septic System Applications And Requirements, quoted and re-checked
  23. On-Site Sewage Management Systems, quoted and re-checked
  24. Septic System Applications And Requirements, quoted and re-checked
  25. 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
  26. Cobb County Code § 78-151, Condition of premises; orderly operation, quoted and re-checked
  27. Cobb County Short Term Rental New Application, quoted and re-checked
  28. Georgia Tiny House Fact Sheet (Georgia statewide rule), quoted and re-checked
  29. Subject 511-3-1 ON-SITE SEWAGE MANAGEMENT SYSTEMS, quoted and re-checked
  30. Plan Review and Permitting, quoted and re-checked
  31. Plan Review and Permitting, quoted and re-checked
  32. Defining Floodway, quoted and re-checked
  33. Residential Permitting, quoted and re-checked
  34. Population density: Bolthole Index county data
  35. Well Water, quoted and re-checked
  36. Obtain a Business License, quoted and re-checked
  37. Subject 511-3-1 ON-SITE SEWAGE MANAGEMENT SYSTEMS, quoted and re-checked
  38. Conservation Use Land Values (Georgia 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, Cobb County requires a building permit for a home.

RuleCobb CountyFulton CountyPaulding CountyDeKalb CountyDouglas CountyBartow CountyCherokee County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCobb & Douglas Public HealthCounty Board of HealthCounty Env. HealthCounty Board of HealthCobb & Douglas Public HealthNorthwest Georgia Public Health DistrictCounty Env. Health

County locator

Cobb County in Georgia

37
County map
Cobb County highlighted among the Georgia counties · colored by Index score

How Cobb County scores

Seclusion11100% ev.
Self-Sufficiency72100% ev.
Admin Boringness43100% ev.
Durability76100% ev.
Property Autonomy56100% ev.
Carry Cost31100% 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 →

$429kTypical home
0.7%Property tax
$21,524Land / acre
52.4"Annual rain
12.2% of yrsSevere drought
7.3 / yr (+6.8)Mid-century 100°F days
15.2 daysMid-century dry spell
2.28" (+7.7%)Mid-century 1-day rain
1.35×Wildfire change factor
100%Forward climate coverage
$1,836Home insurance / yr
3.1% / yrInsurance growth
1.56%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
1,159,729People within 30 min
9,428,224People within 2 hr
1,502,036Radius comparison (15 mi)
2,286People / sq mi
5.5%Federal land
76.6%Land at 15% slope or less
65.1%Soils rated "not limited" for septic (strict USDA rating)
130,519 acWorkable land screen
96.9 tonsBiomass / forest ac
61.1°FAvg temp

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Cities and towns in Cobb 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.

Answers from the rulebook for Cobb County

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

Cobb County rules

  • Building permitLimited

    Commercial building projects in unincorporated Cobb County.

    • All projects in unincorporated Cobb County must begin permit review with Cobb County Community Development.
    • Projects in Acworth, Kennesaw, Mableton, or Powder Springs require submission to both the Cobb County Fire Marshal and Cobb County Water System.
    • Projects in Austell, Marietta, or Smyrna are submitted to the city of jurisdiction for Fire Marshal-related review.
    “All projects in unincorporated Cobb County must begin the permit review process at the Building Permit office with Cobb County Community Development.”
    One more reviewed finding on this topic
    • Required — Commercial building projects in unincorporated Cobb County.
      “All projects in unincorporated Cobb County must begin the permit review process at the Building Permit office with Cobb County Community Development.”
  • Owner-builder exemptionConditional

    A property owner seeking a Cobb County homeowner permit to perform work on the owner's residence.

    • Applicant must intend to reside in the completed structure and not offer it for sale or rental.
    • Applicant must own the property.
    • Applicant functions as general contractor or subcontractor.
    • Further subcontracted electrical, plumbing, heating, and air-conditioning work must be separately permitted and performed by properly licensed contractors.
    • Inspections must follow the established sequence; noncompliant or out-of-sequence work may be ordered removed.
    • Only one permit is authorized per family unit.
    “Applicant intends to reside in completed structure and does not plan to offer same for sale or rental.”
  • InspectionsRequired

    Residential and commercial construction in the unincorporated Cobb County permitting jurisdiction.

    • Construction includes new construction, additions, and remodeling.
    • The county administers and enforces applicable building codes.
    “Permit Approval and Required Inspections”
    One more reviewed finding on this topic
    • Required — Permitted residential and commercial construction in unincorporated Cobb County.
      “Once a permit has been issued, all applicants are obligated to continue the building and inspections process using the House Bill 493 policy as outlined by Cobb County.”
  • Certificate of occupancyLimited

    New businesses, tenants, or buildings in commercial buildings within unincorporated Cobb County.

    • Every new business, tenant, or building is required to have a Certificate of Occupancy.
    • The certificate indicates that the building or tenant meets minimum adopted building and fire codes.
    • The stated requirement does not apply to residential businesses or customary home occupations.
    • If a Certificate of Occupancy already exists for the same use, a new tenant may be eligible for the Information Change Form process rather than a new certificate in the tenant's name.
    “Every new business, tenant, or building is required to have a Certificate of Occupancy. This certificate indicates that the building or tenant meets the minimum adopted building and fire codes. This does NOT apply to residential businesses/customary home occupations.”
  • County-wide zoningPresent (with conditions)

    Zoning administered by Cobb County for properties in unincorporated Cobb County.

    • The official county page specifically limits the referenced zoning map to unincorporated Cobb County.
    • Incorporated municipalities may administer their own zoning rules.
    “A zoning map for properties located within unincorporated Cobb County.”
  • Local zoningVaries (with conditions)

    Local zoning and related land-use administration across Cobb County, aggregated across unincorporated territory and incorporated municipalities.

    • Cobb County zoning and municipal zoning are administered by different jurisdictions.
    • Beginning March 3, 2025, the City of Mableton assumed all zoning and plan review services within its city limits.
    • For projects in unincorporated Cobb County, county Community Development handles the applicable permit-review process; projects within city limits may require submission to the city of jurisdiction.
    “Starting March 3, 2025, the City of Mableton assumed all zoning and plan review services within their city limits. Cobb County officials have been working with city officials to ensure a smooth transition.”
  • Zoning districtsPublished (with conditions)

    Zoning districts and zoning information for properties in unincorporated Cobb County.

    • The county provides zoning codes, a zoning map, zoning forms, zoning information, and an official Unified Development Code website.
    • This claim does not establish the specific dimensional or occupancy limits of each district.
    “Zoning Forms and Schedules [...] Zoning Codes [...] A zoning map for properties located within unincorporated Cobb County.”
  • Minimum lot sizeDistrict specific (with conditions)

    Residential zoning districts identified in Cobb County zoning materials.

    • Examples in the official plan include R-80 with an 80,000-square-foot minimum lot, R-40 with 40,000 square feet, R-30 with 30,000 square feet, R-20 with 20,000 square feet, R-15 with 15,000 square feet, and R-12 with 12,000 square feet.
    • The applicable minimum depends on the parcel's zoning district.
    “Sec. 134-193. R-80 Single-family residential district, Min. 80,000-square-foot lot size”
  • Living in an RVLimited

    Camping or overnight residence with or without a recreational vehicle at an amusement activity governed by Cobb County Code § 78-151.

    • A land use permit under section 134-36 is required for camping or overnight residence.
    • The owner may allow a reasonable number of overnight security personnel, including the owner, contracted agents, or employees of the owner.
    “No person including but not limited to, an operator, owner, employee, manager, vendor or invitee of the amusement activity shall be allowed to camp or reside overnight with or without a recreational vehicle, tent, sleeping bag, vehicle or other structure at an amusement activity unless authorized to do so via a land use permit in accordance with section 134-36 , except that the owner may allow a reasonable number of overnight security personnel, who may be either the owner, contracted agents or employees of the owner.”
  • Who permits septicLocal (with conditions)

    On-site sewage management permitting and related approvals for property located in Cobb County, administered through Cobb & Douglas Public Health Environmental Health.

    • The health district serves both Cobb and Douglas Counties.
    • The page directs applicants to the appropriate county Environmental Health Office for septic permitting and approval.
    “If you have questions about septic system permitting, approval, or other related issues, please contact the appropriate county Environmental Health Office.”
    One more reviewed finding on this topic
    • County (with conditions) — On-site sewage management permitting and approval for property in Cobb County through the applicable county Environmental Health Office and County Board of Health.
      “No person may backfill or use an on-site sewage management system until a final inspection has been made by the County Board of Health, and written approval has been issued by the County Board of Health.”
  • Septic permitRequired

    Lots or structures in Cobb County using an on-site sewage management system, including installation and components.

    • A construction permit must be obtained from the County Health Department before physical development or installation.
    • Repairs, replacements, and additions to existing systems must also be permitted and inspected.
    • Applications must include the listed ownership, location, plans, facility, water-supply, bedroom or flow, soil, signature, and other necessary information.
    “Repairs, replacement, or additions to existing systems must be permitted and inspected.”
    2 more reviewed findings on this topic
    • Required — New residential or commercial on-site sewage management systems and repairs or modifications to existing septic systems in Cobb County.
      “Obtaining a Permit to Repair or Modify an Existing Septic System (Residential or Commercial) [...] Obtaining a Septic Permit for New Residential Construction”
    • Required — Installation, repair, modification, or construction involving an on-site sewage management system on property located in Cobb County, Georgia.
      “Please be aware that any installation, repair, or modification of a septic system will require a permit from our department before any work can be done.”
  • Mandatory utility hookupConditional

    Commercial permitting requiring Cobb County Water System review or water service.

    • The cited source addresses commercial businesses and does not establish a universal water or sewer connection requirement for all property.
    • Applicable water/sewer fees may be discussed during plan review.
    • All Cobb County Water System fees must be paid before a building permit is issued in the described commercial process.
    “All CCWS fees must be paid before a building permit is issued.”
  • Subdividing landRegulated (with conditions)

    Subdivision of land into two or more parcels or lots in unincorporated Cobb County.

    • Unincorporated plats must begin review with Cobb County Community Development Site Plan Review.
    • Subdivision also requires compliance with the Georgia Plat Act and electronic filing with the Cobb County Clerk of Superior Court.
    “All plats in unincorporated Cobb County must begin the plat review process with the Cobb County Community Development Site Plan Review.”
  • Driveway accessRequired

    Driveways accessing a Cobb County road.

    • Cobb DOT approval applies to county roads.
    • The stated approval excludes roads within city boundaries and state routes.
    “Approval of driveways accessing a Cobb County road (excluding roads within City boundaries and state routes)”
  • Building in a floodplainRequired

    Any proposed improvement or development in Cobb County's regulated floodplain.

    • Development in the SFHA, including the floodway, must comply with an approved stormwater management plan or permit.
    • Within the regulatory floodway, encroachments including new construction, fill, substantial improvements, and other development are prohibited.
    • Exceptions may apply to bridges, culverts, roadways, and utilities if engineering analysis shows no increase in flood heights or floodway widths; a valid no-rise certification is required, and CLOMR/CLOMA may also be required.
    “Any proposed improvement or development in the regulated floodplain requires a permit.”
    One more reviewed finding on this topic
    • Required — Any proposed improvement or development in the regulated Cobb County floodplain.
      “Any proposed improvement or development in the regulated floodplain requires a permit.”
  • Short-term rentalsLimited

    Short-term rentals in unincorporated Cobb County.

    • Short-term rentals require a proper certificate of occupancy for the main house.
    • Short-term rentals are not permitted in accessory structures, campers, or similar locations.
    • Zoning verification must address whether the use is prohibited by zoning, stipulations, or variance stipulations.
    • One off-street parking space is required for each 390 square feet of total floor area within the unit.

    off-street parking: per 1 space per 390 square feet

    “Short term rentals are only permitted in the main house with proper Certificates of Occupancy. Short terms rentals are not permitted outside of the main house, in accessory structures, or campers and the like.”
  • Permit feesVariable (with conditions)

    Cobb County commercial permitting and Certificate of Occupancy processes.

    • Permitting fees are based on construction costs, type of structure, inspections required, and other applicable factors.
    • Fire Marshal fees may include plan review, inspections, re-reviews, consultations, and expedited review.
    “Permitting fees are applied based on construction costs, type of structure, and inspections required, etc.”
    2 more reviewed findings on this topic
    • Published (with conditions) — Cobb County development and inspection permit fees.
      “Effective July 1, 2024 all Development & Inspection Fee Schedules will be updated as shown below.”
    • Published — Cobb County development and inspection permit fees.
      “Effective July 1, 2024 all Development & Inspection Fee Schedules will be updated as shown below.”
  • Permit processPublished

    Commercial and land-development permit review in unincorporated Cobb County.

    • Commercial applications begin with the Building Permit office.
    • Land-disturbing activities require review and approval through an LDP.
    • Plans are distributed to relevant departments, including the Water System.
    “All land-disturbing activities in unincorporated Cobb County must be reviewed and approved via the issuance of an LDP.”
    2 more reviewed findings on this topic
    • Published (with conditions) — Residential permitting and land-disturbance permitting in unincorporated Cobb County.
      “Collect Documents Calculate Your Permitting Fees Submit the Application Packet Application Review Permit Approval and Required Inspections”
    • Partial — Residential and commercial permitting processes administered by Cobb County Community Development.
      “Find information on residential permitting including application processes, required documents, and guidelines for homeowners and contractors. The page outlines different types of permits, submission options, and inspection protocols.”

Georgia rules that apply here

  • Building code adoptedAdopted

    The Georgia mandatory state minimum construction codes, including the International Building Code, International Residential Code for One- and Two-Family Dwellings, International Fire Code, International Plumbing Code, International Mechanical Code, International Fuel Gas Code, National Electrical Code, International Energy Conservation Code, and International Swimming Pool and Spa Code, apply to construction statewide.

    • Any structure built in Georgia must comply with the mandatory codes whether or not the local government chooses to locally enforce them.
    • Local governments are not required to adopt the mandatory codes, but must adopt administrative procedures to enforce them under O.C.G.A. Section 8-2-25(a).
    • A local government may choose which mandatory codes it will locally enforce.
    • Local amendments cannot be less stringent than the state minimum code; must be based on local climatic, geologic, topographic, or public safety factors; must identify the need for more stringent requirements in legislative findings; and must be submitted to DCA 60 days before proposed adoption.
    • DCA has 60 days after submission to make a recommendation. If DCA recommends against adoption, the local governing body must specifically reject that recommendation before adopting and enforcing the amendment. If DCA does not respond within 60 days, the local government may adopt the amendment. Adopted local amendments must be filed with DCA.
    “As noted above, the building, one and two family dwelling residential, fire, plumbing, mechanical, gas, electrical, energy, and swimming pool codes are mandatory codes, meaning that under Georgia law, any structure built in Georgia must comply with these codes, whether or not the local government chooses to locally enforce these codes. In addition, since Georgia law gives the enumerated codes statewide applicability, it is not required that local governments have to adopt the mandatory codes.”
    4 more reviewed findings on this topic
    • Adopted (with conditions) — Georgia mandatory state minimum construction codes applicable to construction in Cobb County.
      “The mandatory codes are applicable to all construction whether or not they are locally enforced and the permissive codes are only applicable if a local government chooses to adopt and enforce one or more of these codes.”
    • Partial — Georgia permissive state construction codes, including the Disaster Resilient Building Code IBC Appendix, Disaster Resilient Building Code IRC Appendix, International Property Maintenance Code, International Existing Building Code, and National Green Building Standard.
      “The remaining codes are referred to as permissive codes. Unlike the mandatory codes, in order for a local government to enforce one or more of these permissive codes, that code or codes must be adopted, either by ordinance or resolution, by the local jurisdiction. A copy of the ordinance or resolution adopted must be forwarded to DCA (O.C.G.A. Section 8-2-25 (b)).”
    • Partial — Georgia construction, including residential construction, under the statewide State Minimum Standard Codes framework.
      “The mandatory codes are applicable to all construction whether or not they are locally enforced and the permissive codes are only applicable if a local government chooses to adopt and enforce one or more of these codes.”
    • Adopted — Georgia construction, including residential construction in unincorporated county areas.
      “The mandatory codes are applicable to all construction whether or not they are locally enforced”
  • Tiny homesLimited

    Site-built or modular tiny homes used as single-family dwelling units in Georgia.

    • Tiny homes that are modular dwellings or site-built dwellings are subject to the applicable Georgia building codes.
    • A tiny home must be approved for siting by the applicable local government; local zoning controls land use, location, height, width, foundation type, stories, and minimum lot or building size.
    • The 2020 Georgia IRC Appendix Q tiny-house provisions are not mandatory unless specifically referenced in the adopted local ordinance.
    • This claim does not establish statewide permission for RV-based or manufactured-home tiny homes, which are subject to different standards.

    tiny house floor area: <= 400 square feet or less, excluding lofts · minimum habitable room size referenced in Georgia amendment: >= 70 square feet (source fact sheet describes the 2012 IRC amendment; current local adoption and code edition must be confirmed)

    “Tiny homes are dwelling units and therefore they are subject to the same building code regulations as any other traditional site-built or stick-built home.”
  • Manufactured homesLimited

    Occupancy of manufactured homes installed in Georgia.

    • The home must qualify as a manufactured dwelling unit and satisfy applicable HUD standards.
    • A licensed installer must obtain the Georgia installation permit for each new or pre-owned manufactured home.
    • The installation must comply with state manufactured-housing rules, including inspection and reporting requirements before release of the completed home set for occupancy.
    • Local zoning, siting, utility, and other lawful local requirements may still affect whether a particular parcel may contain the home.

    minimum manufactured-home size: >= 320 square feet · manufactured-home installation permit fee: 60 USD per home · installation report deadline: 3 business days before completion and release for occupancy

    “Installers must purchase a permit from the Insurance and Safety Fire Commissioner's Office for each new or pre-owned manufactured home installed in Georgia.”
  • Septic inspectionRequired

    On-site sewage management systems in Georgia, including Cobb County.

    • A final inspection and written approval by the County Board of Health are required before backfilling or use.
    • Repairs, replacements, and additions to existing systems must be permitted and inspected.
    “No person may backfill or use an on-site sewage management system until a final inspection has been made by the County Board of Health, and written approval has been issued by the County Board of Health.”
    One more reviewed finding on this topic
  • Off-grid sanitationLimited

    Off-grid sanitation using privies, approved alternative onsite sewage systems, or certified composting toilets in Georgia.

    • Privies must meet the Manual's minimum design and construction criteria.
    • Alternative onsite sewage systems must be approved by the Department and meet the Manual's minimum design and construction criteria.
    • Composting toilets must be certified by the National Sanitation Foundation to current Standard 41 or certified by the manufacturer as meeting a nationally recognized standard.
    • Applicable County Board of Health permits and inspections remain required where the system is an onsite sewage management system.
    “composting toilets may be considered”
    One more reviewed finding on this topic
    • Allowed (with conditions) — Approved on-site sewage management systems where public or community sewage treatment systems are unavailable.
      “If public or community sewage treatment systems are not available, the owner of a building, residence, or property that is designed or intended for human occupancy or congregation shall provide an approved on-site sewage management system sufficient for the number of persons normally expected to use or frequent the building, residence or other property for two hours or more.”
  • Well permitLimited

    Domestic and other water-well construction in Georgia.

    • All water wells must comply with the Water Well Standards Act.
    • A water-well contractor must contact the local county health department in advance for site review.
    • Certain county health departments require a well-construction permit before construction.
    • Agricultural irrigation wells require a Letter of Concurrence before drilling begins.
    • Well Construction Data must be sent to the owner and local health department within 30 days after completion.

    well construction data submission deadline: <= 30 days after completion

    “certain county health departments require well construction permits prior to well construction”
    One more reviewed finding on this topic
    • Limited — Individual private wells drilled in Cobb County.
      “prior to actual construction, the water well contractor must notify the county health department of the intent to drill a water well”
  • Agricultural exemptionAvailable (with conditions)

    Bona fide agricultural and/or timber property qualifying for Georgia conservation-use current-use assessment.

    • The property must be devoted to a qualifying conservation use.
    • The property must be maintained in a qualifying use for ten years.
    • The owner must file the application with the county board of tax assessors by the county deadline for filing ad valorem tax returns.
    • This is a property-tax assessment benefit and does not itself establish an exemption from local zoning or building regulations.

    assessment basis: 40 percent of current use value · minimum covenant period: >= 10 years

    “Real property that is devoted to bona fide conservation uses is assessed at 40% of its current use value.”
    2 more reviewed findings on this topic
    • Available (with conditions) — Farm buildings or structures qualifying under Georgia law for exemption from the state minimum standard building codes.
      “exempts such buildings from the state minimum standard building codes.”
    • Available (with conditions) — Crop-management and animal-husbandry practices involved in producing agricultural or farm products on private property in Georgia.
      “regulating crop management or animal husbandry practices involved in the production of agricultural or farm products on any private property.”
  • county zoning authorityGeneral

    Georgia counties exercising zoning power over unincorporated areas within their territorial boundaries.

    • The Zoning Procedures Law confirms local-government zoning authority generally; it does not require a local government to exercise zoning power.
    • For counties, territorial boundaries are the unincorporated areas and certain areas defined in O.C.G.A. § 36-70-2(5.1).
    • County zoning ordinances and zoning decisions remain subject to the statutory minimum procedures, including public-hearing and notice requirements.
    • The statute defines zoning to include districting property for various uses, prohibiting other uses within zones or districts, and regulating development and improvement of real estate within those zones or districts.
    “While recognizing and confirming the authority of local governments to exercise zoning power within their respective territorial boundaries [...] “Local government” means any county or municipality”
  • county building authorityGeneral

    Georgia counties administering and enforcing state minimum construction codes, including residential construction in unincorporated areas.

    • Local governments must adopt reasonable administrative provisions for administering and enforcing state minimum standard codes.
    • Those administrative powers include inspecting buildings, employing inspectors and other personnel, requiring permits and establishing permit charges, and contracting with other local governments for code enforcement.
    • A local government may choose which mandatory state codes it locally enforces, but any mandatory code locally enforced must use the latest edition and DCA amendments.
    • Local amendments may not be less stringent than the state minimum code, must be based on local climatic, geologic, topographic, or public-safety factors, require legislative findings identifying the need, and must be submitted to DCA 60 days before proposed adoption.
    • Local amendments must be filed with DCA after adoption.
    “These powers include: [...] Requiring permits and to establishment charges for said permits; and Contracting with other local governments for code enforcement.”

Still unanswered

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

  • Minimum dwelling size — Minimum dwelling floor area or other minimum dwelling-size requirement in unincorporated Cobb County.
  • Setbacks — Building setbacks in unincorporated Cobb County.
  • Lot coverage — Lot coverage in unincorporated Cobb County.
  • Building height — Building height in unincorporated Cobb County.
  • Camping on your land — Temporary camping on private land in unincorporated Cobb County.
1 more unanswered
  • Accessory dwellings

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 Cobb County, Georgia

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

Cobb County scores 37/100 on the Bolthole Index, a marginal county profile. Its strengths: mixed durability signals and workable self-sufficiency basics (52.4″/yr rainfall). Watch-outs: little seclusion — roughly 1,159,729 people within a 30-minute drive and higher long-term carry cost.

Do you need a building permit in Cobb County, Georgia?

Cobb County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Cobb & Douglas Public Health, Environmental Health Division. 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.

How much does land cost in Cobb County, Georgia?

Land in Cobb County runs about $21,524 per acre, based on the latest county data.

What is the water situation in Cobb County?

Cobb County gets about 52.4" of rain a year, with severe drought in roughly 12.2% of years.

How remote is Cobb County?

A representative private-land location has about 1,159,729 people within a 30-minute drive and 9,428,224 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 Cobb compares in Georgia

Compare side-by-side →See all 159 Georgia counties ranked →