Cobb County, GA Building Permits, Zoning & Septic Rules

Unincorporated Cobb County, Georgia requires permits for building, electrical, mechanical, plumbing and gas construction¹. The county also administers zoning, publishes its residential permit process and fees, and requires permits for development in a floodplain²³⁴⁵. Cobb & Douglas Public Health handles septic approval through the County Board of Health⁶.

At a glance

Building permit: Required for building, electrical, mechanical, plumbing and gas work¹
Zoning: Yes, unincorporated Cobb County is zoned by the county's own Zoning Division²
Septic permits: County health construction permit, site inspection and final approval required⁷⁸
Owner-builder: Conditional for an owner-occupied home that will not be sold or rented⁹
Driveway / road access: Cobb DOT approval required for access to a county road; city roads and state routes are excluded¹⁰
Minimum lot size: Varies by zoning district¹¹
Manufactured homes: State installer permit required, plus local zoning and siting rules¹²

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

[email protected]

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

[email protected]

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

[email protected]

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

[email protected]

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 September 29, 2026.

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

Yes. Cobb County Code Section 18-27 requires a contractor or owner to obtain a permit through the Community Development Agency before building, electrical, mechanical, plumbing or gas construction in unincorporated Cobb County¹. Cobb County publishes a residential workflow covering document collection, fee calculation, application, review, approval and required inspections³. The county also publishes permit fees, including a rate based on estimated construction cost for a complete new residential building and separate listed charges for plan review, technology and completion documents⁴. An owner-builder permit is possible, but only for an owner who intends to live in the completed home and not offer it for sale or rent; separately permitted trade work and licensed subcontractors are still required where applicable⁹.

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

Cobb County Building Development is the first stop for residential construction permits in unincorporated Cobb County¹. The office is at 1150 Powder Springs St, Ste 400, Marietta, GA 30064, and residential permit questions can go to [email protected]¹³. Owner-builders must complete a preconstruction consultation with the Chief Building Inspector at 770-528-2053 before receiving approval to serve as general contractor¹³. Cobb County limits that route to property the applicant owns and will occupy, not a home intended for sale or rental, and requires separately permitted trade work plus properly licensed contractors for work the owner subcontracts⁹. Start with the county's published checklist for the project type, assemble the documents, calculate the fees, submit the packet and complete review and inspections³.

Does Cobb County have zoning?

Yes. Cobb County's Zoning Division administers zoning and variances for unincorporated land². Minimum lot size depends on the parcel's residential zoning district rather than one countywide minimum¹¹. Reach the Zoning Division at (770) 528-2035 or visit 1150 Powder Springs St, Ste 400, Marietta, GA 30064¹⁴. The available materials do not confirm complete county rules for RV residence, temporary camping, accessory dwellings, minimum dwelling size, setbacks, lot coverage or building height, so ask the Zoning Division about the parcel and proposed use before buying. Tiny homes built as site-built or modular dwellings must meet applicable Georgia building codes and receive local siting approval, but that statewide rule does not authorize RV-based tiny homes¹⁵.

How do septic permits work in Cobb County?

Cobb & Douglas Public Health regulates septic tanks in Cobb County, while the County Board of Health supplies the required permitting and final approval¹⁶⁶. Obtain a County Health Department construction permit before developing a lot that will use septic or installing any part of the system; the permit process includes a site inspection and also covers repairs, replacements and additions⁷. Do not backfill or use the system until the County Board of Health completes its final inspection and gives written approval⁸. About 65.1% of county soils are rated without severe limits for a conventional drain field, but that countywide figure does not replace evaluation of the actual site¹⁷. If public sewer is available, connection rules may apply, including immediate connection when an existing onsite system fails, subject to the reviewed conditions and any health-board determination¹⁸¹⁹.

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 living or temporary camping on private land in unincorporated Cobb County; ask the Zoning Division about the parcel's district and the proposed duration. A site-built or modular tiny home must comply with applicable Georgia building codes and receive local siting approval, while RV-based and manufactured tiny homes follow different standards¹⁵. A manufactured home also needs installation by a licensed installer under a state permit, plus applicable local zoning, siting and utility approval¹². Living off grid does not eliminate sanitation review: where public or community sewage treatment is unavailable, an occupied property must use an approved onsite sewage system sized for expected use, with construction and final approvals and inspections²⁰.

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

Confirm the parcel's zoning district, district-specific minimum lot size and any subdivision review with the Zoning Division before committing to a design²¹¹²¹.
If acting as owner-builder, complete the Chief Building Inspector consultation and confirm that the project meets the owner-occupancy and no-sale-or-rental conditions¹³⁹.
Follow Building Development's published sequence: collect the project documents, calculate fees, submit the application packet, complete review, receive approval and arrange required inspections³.
Where the property will use septic, obtain the health construction permit and site inspection before physical development begins⁷.
Obtain Cobb DOT approval for a driveway connecting to a county road; city streets and state routes use different authorities¹⁰.
If the site is in a floodplain, obtain the required floodplain development permit from Community Development and Inspections⁵.
Complete the septic final inspection before backfilling or use, then finish the county's required building inspections⁸³.

What to check before you buy land in Cobb County

Cobb County is about 12 miles from the nearest city of 100,000 or more and has roughly 2,286 residents per square mile, so buyers should expect suburban development pressure rather than remote-rural conditions²²²³. Before closing, verify zoning, minimum lot size and whether a proposed division needs County Board of Health approval for water and sewage plans²¹¹²¹. Check actual soils for septic suitability even though about 65.1% of county soils lack severe limits for a conventional drain field¹⁷. Confirm whether the driveway meets a county road, city street or state route because Cobb DOT's reviewed approval applies only to county-road access¹⁰. Check the flood map early: all development in a Cobb County floodplain requires a permit⁵. Typical home value is about $429,051, while the median property-tax bill is about $2,560 a year at an effective rate near 0.7%²⁴²⁵²⁶.

Watch-outs

Building before Cobb County issues the permit can trigger double the permit fee, subject to the published cap⁴.
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 plans²¹.
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 rules²⁷.
We could not confirm whether an individual private well needs a separate Cobb County permit; a well contractor must contact the local health department for site review before drilling²⁸.

Sources

Written September 29, 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.

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%Septic soil without severe limits

130,519 acWorkable land screen

96.9 tonsBiomass / forest ac

61.1°FAvg temp

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

Owner-builder exemptionConditional
A property owner applying for a Cobb County homeowner permit to perform work on the owner's residence.
- The applicant must intend to reside in the completed structure and not offer it for sale or rental.
- The applicant must own the property.
- The applicant functions as general contractor or subcontractor and must hire properly licensed contractors for subcontracted work.
- Electrical, plumbing, heating, and air-conditioning work must be separately permitted.
- Only one permit is authorized per family unit.
- Inspections must follow the established sequence; noncompliant or out-of-sequence work may be ordered removed.
- Knowingly false statements may result in criminal penalties.
“Applicant intends to reside in completed structure and does not plan to offer same for sale or rental.”
Homeowner Permit Request ↗Re-checked Sep 26, 2026
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”
2026 Comprehensive Plan Amendments ↗Re-checked Sep 26, 2026
Who permits septicCounty (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.
- The public-health page directs septic-permitting questions to the appropriate county Environmental Health Office.
- The Georgia rule assigns permit and final-approval functions to the 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 System Applications And Requirements ↗Re-checked Sep 26, 2026
Driveway accessRequired
Driveways accessing Cobb County roads outside city boundaries and excluding state routes.
- Cobb DOT approval applies to driveways accessing a Cobb County road.
- The page excludes roads within city boundaries and state routes.
- Development Standards may impose additional access and design requirements.
“Approval of driveways accessing a Cobb County road (excluding roads within City boundaries and state routes)”
Transportation Permitting and Approvals ↗Re-checked Sep 26, 2026
Building in a floodplainRequired
Development in Cobb County floodplains, including the Special Flood Hazard Area.
- The county states that all development in the floodplain requires a permit.
- Special Flood Hazard Areas are subject to specific development requirements.
- Property owners must contact the Cobb County Department of Community Development and Inspections Division for a permit.
- Wet floodproofing is not permitted in habitable areas; dry floodproofing is limited to non-residential structures.
“Keep in mind that all development in the floodplain requires a permit.”
Flood Protection for Your Property ↗Re-checked Sep 26, 2026
Permit feesPublished
Cobb County building permits and related development permits.
- The residential building permit fee is $6.00 per $1,000 of estimated construction cost for new complete building construction.
- Residential fee tiers range from $80 for construction cost up to $15,000 to $450 for $50,001-$75,000, with higher costs charged at $6 per $1,000.
- The fee schedule states an effective date of July 1, 2024 and says fees will be updated annually.
- Additional fees include a $50 certificate-of-occupancy or letter-of-completion fee for new homes, a $15 technology fee, a $100 site-plan-review fee for listed residential work, and reinspection fees of $50, $75, and $100.
- A $500 temporary certificate of occupancy fee is subject to approval and valid for a maximum of 30 days.
- Construction before permit issuance incurs double the permit fee, capped at $1,000.
residential building permit rate: 6 USD per 1000 USD construction cost (new complete building construction)
“Building permit fees will be updated annually to reflect the current published ICC chart.”
Cobb County Development & Inspections Building Permit Fee Schedule ↗Re-checked Sep 26, 2026
Permit processPublished
Residential permitting in unincorporated Cobb County.
- The county's process includes document collection, fee calculation, application submission, review, permit approval, and required inspections.
- The county provides homeowner permits, new single-family-home permits, mobile-home permits, accessory-structure permits, and other residential checklists.
“Collect Documents Calculate Your Permitting Fees Submit the Application Packet Application Review Permit Approval and Required Inspections”
Residential Permitting ↗Re-checked Sep 26, 2026
County-wide zoningPresent
Cobb County Community Development's Zoning Division administers zoning and variances for unincorporated Cobb County.
Cobb County Zoning Division ↗Scouted from the county site, not yet independently re-checked

Georgia rules that apply here

Building permitLimited
Construction throughout Georgia subject to the state minimum standard codes and local code-administration procedures.
- The mandatory building, residential, fire, plumbing, mechanical, gas, electrical, energy, and swimming-pool codes apply statewide whether or not locally enforced.
- 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 locally enforces.
- Permit requirements and permit charges are administered through local-government code-enforcement procedures; the statewide source does not establish one uniform permit requirement or fee for every jurisdiction.
“Requiring permits and to establishment charges for said permits; and”
Mandatory and Permissive State Codes ↗Re-checked Sep 26, 2026
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.”
Mandatory and Permissive State Codes ↗Re-checked Sep 26, 2026
3 more reviewed findings on this topic
- 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)).”
  Mandatory and Permissive State Codes ↗Re-checked Sep 26, 2026
- 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.”
  Mandatory and Permissive State Codes ↗Re-checked Sep 26, 2026
- 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”
  Mandatory and Permissive State Codes ↗Re-checked Sep 26, 2026
InspectionsLimited
Inspection and enforcement of state minimum standard construction codes by Georgia local governments.
- Local governments must adopt reasonable administrative provisions to administer and enforce the state minimum standard codes.
- Those provisions should include procedures for code enforcement, hearings, appeals from local inspectors, and other procedures necessary for local administration and enforcement.
- Local-government enforcement powers include inspecting buildings and other structures to ensure code compliance.
- If a local government chooses to locally enforce any state minimum code, it must enforce the latest editions and DCA-adopted amendments.
- Local amendments must satisfy the Uniform Codes Act requirements, including that requirements cannot be less stringent than the state minimum code and proposed amendments must be submitted to DCA 60 days before proposed adoption.
“Inspecting buildings and other structures to ensure compliance with the code;”
Enforcement of State Minimum Codes ↗Re-checked Sep 26, 2026
Certificate of occupancyLimited
Certificate-of-occupancy issuance for Georgia construction projects where the applicable county or municipality requires or administers one.
- Only a local governing authority may issue a certificate of occupancy.
- Inspections may be necessary or required for issuance according to the governing authority's requirements.
- The cited state materials do not establish a certificate-of-occupancy requirement for every building statewide.
“Only a local governing authority shall be authorized to issue a certificate of occupancy.”
Qualified Inspectors ↗Re-checked Sep 9, 2026
Zoning districtsPartial
Georgia zoning authority and local zoning-district systems.
- The state source establishes local-government authority to use zoning but does not publish the zoning districts for any particular parcel, county, or municipality.
- The applicable zoning ordinance and district must be identified from the parcel's county or municipality.
“It contains the Zoning Procedures Law which gives local governments the authority to use zoning to manage development activities.”
Governing Statutes, Regulations, and Guidance ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Partial — Zoning regulation and zoning districts used to manage development activities in Georgia.
  “It contains the Zoning Procedures Law which gives local governments the authority to use zoning to manage development activities.”
  Governing Statutes, Regulations, and Guidance ↗Re-checked Sep 9, 2026
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.”
Georgia Tiny House Fact Sheet ↗Re-checked Sep 9, 2026
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.”
Manufactured Housing ↗Re-checked Sep 9, 2026
Septic permitRequired
Construction, repair, replacement, or addition of an onsite sewage management system in Georgia.
- The County Board of Health must find the site suitable before issuing a construction permit.
- Repairs, replacements, and additions to existing systems must be permitted and inspected.
- A construction permit is valid for not more than 12 months from issuance.
- If a public water supply system is to be used, that system must be approved before the onsite sewage construction permit is issued.
permit validity: <= 12 months · conventional or chamber septic tank design capacity: 1000-10000 gallons
“without having first obtained ... a construction permit”
Manual for On-Site Sewage Management Systems ↗Re-checked Sep 9, 2026
One more reviewed finding on this topic
- Required — Installation, repair, replacement, or addition of an on-site sewage management system in Georgia, including Cobb County.
  “No person may begin the physical development of a lot or structure where an on-site sewage management system will be utilized, nor install an on-site sewage management system or component thereof, without having first obtained from the County Health Department a construction permit for the installation of an onsite sewage management system.”
  Subject 511-3-1 ON-SITE SEWAGE MANAGEMENT SYSTEMS ↗Re-checked Sep 26, 2026
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.”
Subject 511-3-1 ON-SITE SEWAGE MANAGEMENT SYSTEMS ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Required — Onsite sewage management systems before backfilling or use in Georgia.
  “until a final inspection has been made”
  Manual for On-Site Sewage Management Systems ↗Re-checked Sep 9, 2026
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”
Manual for On-Site Sewage Management Systems ↗Re-checked Sep 9, 2026
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.”
  Subject 511-3-1 ON-SITE SEWAGE MANAGEMENT SYSTEMS ↗Re-checked Sep 26, 2026
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”
Water Well Standards ↗Re-checked Sep 9, 2026
Mandatory utility hookupSewer (with conditions)
Buildings, residences, and properties designed or intended for human occupancy or congregation in Georgia when a public or community sewage treatment system is available.
- Connection is required when a public or community sewage treatment system is available within 200 feet of the property line or in a public right-of-way abutting the property.
- If an existing onsite sewage system fails, immediate connection to a public or community sewerage system is required if such a system is available.
- If a public or community sewage treatment system is to be constructed, an existing public or community sewer is to be extended to serve a lot, or an approved onsite sewage management system is to be used, the building sewer must be installed to ensure gravity flow at a self-cleaning velocity throughout.
- A residential onsite sewage system of less than 2,000 gallons per day that is failing may be exempted from connecting to sewer if repair or replacement meets the Manual for Onsite Sewage Management Systems criteria and the County Board of Health determines that sufficient area and usable soils exist.
sewer availability distance: <= 200 feet from property line (A public right-of-way abutting the property is an alternative availability condition.) · failing residential onsite sewage system flow: < 2000 gallons per day (The County Board of Health must determine sufficient area and usable soils, and repair or replacement must meet the Manual for Onsite Sewage Management Systems criteria.)
“Connection shall be made to a public or community sewage treatment system if such system is available within two hundred feet (200') of the property line, or available in a public right-of-way abutting the property. [...] If an existing on-site sewage system fails, immediate connection shall be made to a public or community sewerage system if such a system is available. (b) A residential on-site sewage system of less than two thousand gallons per day that is failing may be exempted from connecting to sewer if the repair or replacement of the system will meet the criteria set forth in the Manual for Onsite Sewage Management Systems and has sufficient area and usable soils as determined by the County Board of Health.”
GA DPH Onsite Sewage Manual ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Conditional — Properties using or potentially using public/community sewer or on-site sewage management systems.
  “If an existing on-site sewage system fails, immediate connection shall be made to a public or community sewerage system if such a system is available.”
  Subject 511-3-1 ON-SITE SEWAGE MANAGEMENT SYSTEMS ↗Re-checked Sep 26, 2026
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.”
Conservation Use Land Values ↗Re-checked Sep 9, 2026
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.”
  Codes Update Newsletter Spring 2011 ↗Re-checked Sep 26, 2026
- 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.”
  Official Code of Georgia Annotated, Title 2 Agriculture ↗Re-checked Sep 26, 2026
Subdividing landRegulated (with conditions)
Subdivision development involving on-site sewage management systems in Georgia, including Cobb County.
- Subdivision approval requires a completed Subdivision Analysis Record and supporting documents.
- For subdivisions and mobile-home parks, public water connection is required if available within 1,000 feet.
- Use of onsite systems is subject to soil and sewer-availability conditions.
public water supply distance: <= 1000 feet (subdivisions and mobile home parks)
“No person may sell, offer for sale, lease, rent, or begin construction or otherwise begin the physical development of a lot in a subdivision or mobile home park until written approval of plans for water supply and sewage disposal in the subdivision or park has been issued from the County Board of Health.”
Subject 511-3-1 ON-SITE SEWAGE MANAGEMENT SYSTEMS ↗Re-checked Sep 26, 2026
3 more reviewed findings on this topic
- Regulated (with conditions) — Creation and recording of subdivisions and subdivision plats in Georgia, subject to applicable state recording law and properly adopted local subdivision ordinances.
  “All of the properly adopted ordinances and regulations of a county remain fully enforceable against the developer or owner seeking to create the subdivision.”
  2005-5 ↗Re-checked Sep 9, 2026
- Limited — Creation and recording of subdivisions and subdivision plats in Georgia, subject to applicable county and municipal ordinances and statutory plat-recording rules.
  “All of the properly adopted ordinances and regulations of a county remain fully enforceable against the developer or owner seeking to create the subdivision.”
  2005-5 ↗Re-checked Sep 26, 2026
- Regulated (with conditions) — Statewide Georgia legal framework for subdivision creation and enforcement of properly adopted county subdivision ordinances.
  “All of the properly adopted ordinances and regulations of a county remain fully enforceable against the developer or owner seeking to create the subdivision.”
  2005-5, Office of the Attorney General ↗Re-checked Sep 26, 2026
Short-term rentalsLimited
Property-management services for Georgia properties available for less than 90 days' occupancy by guests or occupants; this is a conditional exemption from Chapter 40 of Title 43 and does not eliminate applicable zoning, tax, licensing, permit, or other local requirements.
- The property manager must enter into a written agreement with the owner specifying all management terms and conditions, reporting of income and expenses, and remitting income to the owner.
- The management agreement must not allow the property manager to rent or lease the property, and the guest or occupant agreement must not be a lease or rental agreement.
- Applicable zoning laws must not prohibit short-term occupancy uses of the property.
- The guest's or occupant's occupancy must be for less than 90 days.
- No deposit may exceed the cost of the rental required for the minimum rental period.
- The guest or occupant must pay required state or local sales taxes or excise taxes on rooms, lodgings, and accommodations, and the property manager must have required state or local business licenses or permits.
- The property manager must have authority to specify the rooms or units the guest or occupant will occupy.
- No extra charge may be made for basic utilities.
- Notice is not required for a guest or occupant to terminate occupancy of the room or unit, except as provided under Article 1 of Chapter 21 of Title 43.
- The room or unit must not be the guest's or occupant's permanent residence.
- The cited enactment concerns exemption from real-estate-broker licensing requirements; it is not a statewide authorization overriding local short-term-rental ordinances or private restrictions.
maximum occupancy duration: < 90 days (The condition requires occupancy for less than 90 days.)
“(a) Except as otherwise provided, this chapter shall not apply to: [...] (11) Any person who provides property management services on properties available for less than 90 days' occupancy by guests or occupants and meets all of the following conditions:”
House Bill 399 (AS PASSED HOUSE AND SENATE) ↗Re-checked Sep 26, 2026
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”
Georgia Zoning Statutes Compilation ↗Re-checked Sep 26, 2026
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.”
Administration and Enforcement of State Minimum Codes ↗Re-checked Sep 26, 2026

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 size in unincorporated Cobb County.
Setbacks — Building setbacks in unincorporated Cobb County.
Lot coverage — Lot coverage limits in unincorporated Cobb County.
Building height — Building-height limits in unincorporated Cobb County.
Living in an RV — Long-term or residential RV occupancy on private property in unincorporated Cobb County.

2 more unanswered

Camping on your land
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.

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

At a glance

Who to call

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

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

Does Cobb County have zoning?

How do septic permits work in Cobb County?

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

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

What to check before you buy land in Cobb County

Watch-outs

Sources

Cobb County in Georgia

How Cobb County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Cobb County

Cobb County rules

Georgia rules that apply here

Still unanswered

Living off-grid in Cobb County, Georgia

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

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

How much does land cost in Cobb County, Georgia?

What is the water situation in Cobb County?

How remote is Cobb County?

How Cobb compares in Georgia