Unincorporated DeKalb County, Georgia requires a building permit for construction projects handled by the county, and its zoning ordinance controls land use12. DeKalb Public Health separately requires permits before a contractor installs a new septic system or drain line or repairs an existing system3. First confirm whether the parcel is inside a city, because a city may be the primary permitting authority4.
At a glance
- Building permit
- Required for projects handled by unincorporated DeKalb County1
- Zoning
- County zoning applies in unincorporated DeKalb County2
- Septic permits
- Required for new systems, new drain lines and repairs3
- Owner-builder
- A primary-residence owner may take responsibility but must file a Homeowner’s Affidavit5
- Tiny homes
- Building-code and local zoning approval apply; parcel-specific occupancy rules remain unconfirmed6
- RV living
- We could not confirm a county rule; ask the Zoning Division before occupying an RV7
- Manufactured homes
- A state installation permit and applicable local approvals are required8
Who to call
Building permits
DeKalb County Permits, Plan Review & Inspections Division
Plan review, building permits and inspections for county-handled construction and development projects
178 Sams Street, Decatur, GA
Zoning
Zoning, rezoning, variances and special land use permits in unincorporated DeKalb County
178 Sams Street, Decatur, GA
Septic permits
DeKalb Public Health Environmental Health
Septic-system plan review, site evaluation, permits and complaints
445 Winn Way, Suite 320, Decatur, GA 30030
Floodplain permits
DeKalb County Floodplain Management
Floodplain questions and property-specific floodplain guidance
Contact details are copied from each office’s official page and were checked against it on September 27, 2026.
Do you need a building permit in DeKalb County, Georgia?
Yes. A building permit application is required for construction projects handled by unincorporated DeKalb County, including residential work, while an incorporated city may be the primary authority for property inside its limits1. The county reviews plans, issues permits and conducts inspections through final inspection910. DeKalb County adopted the 2024 ICC codes effective January 1, 202611. An owner working on a primary residence may assume responsibility instead of hiring a contractor, but must submit a Homeowner’s Affidavit; permits and inspections still apply5. After every required inspection succeeds, a project that requires a certificate of occupancy may obtain one from DeKalb Development Services12.
Who is the DeKalb County building department, and how do you reach it?
DeKalb County’s Permits, Plan Review & Inspections Division is the building department for county-handled projects9. The office is at 178 Sams Street, Decatur, GA; call 404-371-2155 or email [email protected]9. Applicants submit plans and required documents through ProjectDox, county reviewers examine the applicable disciplines, applicants answer comments, and approval leads to permit issuance13. The published fee schedule lists a minimum building-permit fee of $175 plus a $20 technology fee, while total charges vary by project, valuation, reviews, inspections and services14. For parcel use, rezoning, a variance or a special land use permit, contact the Zoning Division separately at the same street address7.
Does DeKalb County have zoning?
Yes. DeKalb County’s Zoning Ordinance establishes land-use standards for development in unincorporated DeKalb County, and the Zoning Division administers the ordinance, overlay districts and land-use regulations27. The county publishes district and overlay regulations, but the answer for a particular tract depends on its mapped district and any overlay15. Ask the Zoning Division to confirm the proposed dwelling type, use, setbacks and parcel-specific approvals before purchase7. Georgia treats a site-built or modular tiny home as a dwelling subject to applicable building codes and local siting approval; local zoning may control its location, dimensions, foundation, lot size and building size6. We could not confirm DeKalb-specific rules for RV residence, temporary camping, accessory dwellings or minimum home size, so those questions also belong with the Zoning Division7.
How do septic permits work in DeKalb County?
DeKalb Public Health Environmental Health handles on-site sewage systems countywide16. A certified contractor must obtain approval before installing a new septic system or drain line or repairing an existing system, using the construction-permit application and engineered-site-plan checklist3. Applications may be emailed to [email protected] or delivered to 445 Winn Way, Suite 320, Decatur, GA 30030317. The system cannot be backfilled or used until the County Board of Health completes its final inspection and issues written approval18. Pumping out an existing tank does not require a permit, but the pumping contractor must be certified19. About 51.4% of county soils lack severe limitations for a conventional drain field, so obtain a parcel-specific site evaluation before budgeting for a standard system20.
Can you live in an RV or tiny home in DeKalb County?
We could not confirm a DeKalb County rule that allows long-term RV occupancy or temporary camping on private land, so ask the Zoning Division about the parcel and proposed use before moving an RV onto unincorporated land7. For a site-built or modular tiny home used as a dwelling, Georgia requires the applicable building codes and local approval for siting; local zoning controls matters such as land use, location, foundation and minimum lot or building size6. DeKalb-specific tiny-home occupancy limits remain unconfirmed, so the statewide rule is not permission for a particular parcel7. A manufactured home follows a different path: a licensed installer must obtain the state installation permit, and local zoning, siting and utility requirements may also apply8.
Building a home in DeKalb County: the steps, in order
- Confirm whether the parcel is in unincorporated DeKalb County or an incorporated city, because the city may be the primary permit authority4.
- Confirm the zoning district, overlay and proposed residential use with the Zoning Division157.
- If the home will use septic, secure Environmental Health approval before site development or installation begins16.
- If the home will use public sewer instead, complete the county’s Sewer Capacity Evaluation21.
- Submit plans and required documents through ProjectDox; an owner taking responsibility for a primary residence must include a Homeowner’s Affidavit135.
- Respond to plan-review comments, obtain the permit and complete required inspections1310.
- After all required inspections pass, obtain a certificate of occupancy when the project requires one12.
What should you check before buying land in DeKalb County?
Start with jurisdiction, zoning and access: confirm whether the tract is unincorporated, identify its zoning district and overlay, and ask the appropriate road authority about driveway approval41522. Development in a county-reviewed flood hazard area must satisfy FEMA and local standards, so ask Floodplain Management for a parcel-specific determination2324. For septic land, verify soil and site suitability; only 51.4% of county soils lack severe conventional drain-field limitations20. For a well, Georgia requires advance contact with the county health department, but we could not confirm that DeKalb requires a separate construction permit25. DeKalb County has about 2,850 residents per square mile, and the nearest city of 100,000 or more is about 11 miles from the county center, so expect an urban land market rather than remote acreage2627. The effective property-tax rate is about 0.9%, with a median annual bill near $3,0462829.
Watch-outs
- A DeKalb mailing address does not prove county jurisdiction; incorporated cities may be the primary permitting authority, so check the parcel before applying4.
- We could not confirm long-term RV occupancy or temporary-camping rules for unincorporated DeKalb County; ask the Zoning Division about the exact parcel and use7.
- A failed on-site sewage system must connect immediately to an available public or community sewer unless the stated county health criteria support an exemption21.
Sources
- Permits, Plan Review & Inspections, quoted and re-checked
- Zoning, quoted and re-checked
- Septic Systems, quoted and re-checked
- Permits, Plan Review & Inspections (2026 county census)
- Permits, Plan Review & Inspections, quoted and re-checked
- Georgia Tiny House Fact Sheet (Georgia statewide rule), quoted and re-checked
- DeKalb County Zoning Division (dekalbcountyga.gov)
- Manufactured Housing (Georgia statewide rule), quoted and re-checked
- DeKalb County Permits, Plan Review & Inspections Division (dekalbcountyga.gov)
- Permits, Plan Review & Inspections, quoted and re-checked
- Mandatory and Permissive State Codes, quoted and re-checked
- Permits, Plan Review & Inspections, quoted and re-checked
- Permits, Plan Review & Inspections, quoted and re-checked
- Building Permit Fee Schedule, quoted and re-checked
- Zoning, quoted and re-checked
- On-Site Sewage Management Systems Manual, quoted and re-checked
- DeKalb Public Health Environmental Health (dekalbpublichealth.com)
- On-Site Sewage Management Systems Manual, quoted and re-checked
- Septic Systems, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Permits, Plan Review & Inspections, quoted and re-checked
- Regulations for Driveway & Encroachment Control Manual (Georgia statewide rule), quoted and re-checked
- Land Development, quoted and re-checked
- DeKalb County Floodplain Management (dekalbcountyga.gov)
- Water Well Standards (Georgia statewide rule), quoted and re-checked
- Population density: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
Written September 27, 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.