Unincorporated Washington County, Alabama does not require a building permit for a home, and the county has no zoning ordinance, so there is no county-set minimum lot size, setback, or building-height rule to clear123. Septic is handled separately: any onsite sewage system needs a Permit to Install from the Washington County Health Department before construction begins4. Alabama's owner-builder exemption lets you act as your own contractor on a home you'll live in, as long as you supervise all the work yourself5.
At a glance
- Building permit
- Not required in unincorporated Washington County1
- Zoning
- No countywide zoning ordinance2
- Setbacks, lot size, height, lot coverage
- None set by the county; Alabama gives Washington County no general zoning power3
- RVs, tiny homes, manufactured homes
- Unrestricted by any county zoning rule, since the county has no zoning authority3
- Septic permits
- Washington County Health Department (Environmental Office)4
- Owner-builder exemption
- Yes, if you act as your own contractor and supervise the work5
- Manufactured home occupancy
- Allowed statewide if it meets Alabama's size and HUD-seal requirements6
Who to call
Septic permits
Washington County Health Department - Environmental Office
Septic tank (onsite sewage system) permits and complaints for Washington County
14900 St. Stephens Avenue, Chatom, Alabama 36518
Also useful
General county government contact; there is no separate county building, planning or zoning department to call
45 Court Street, Chatom, AL 36518
Roads & driveways
Washington County Road and Bridge Department
General maintenance of county roadways and drainage; county driveway/culvert access questions for roads not maintained by ALDOT
45 Court Street, Chatom, AL 36518
Contact details are copied from each office’s official page and were checked against it on September 24, 2026.
Do you need a building permit in Washington County, Alabama?
No. Washington County's list of official departments includes no building or permitting department, and no county building-permit requirement was found for unincorporated areas1. Alabama law lets a county commission adopt a building code by ordinance for unincorporated areas, but Washington County has not been confirmed to have done so7. If you act as your own contractor and personally supervise all the work on a one- or two-family home you'll occupy, Alabama's owner-builder exemption applies, though any subcontractor you hire must be licensed once their portion of the job exceeds $10,00058. Note that this exemption only waives contractor licensure, not any building permit, inspection, or certificate-of-occupancy rule that might separately apply. Farm buildings are separately exempt from Alabama's residential-contractor licensing requirement, though a residence inside a farm building is not9.
Who do you call with building or zoning questions in Washington County?
There's no dedicated building or zoning office to call: Washington County's official department list runs from the Circuit Court Clerk and County Commission through the Sheriff's Office and Solid Waste Authority, with no building, planning, or zoning department among them1012. For a general county question, call the Commission Office at (251) 847-2208, 45 Court Street in Chatom10. For a county road or driveway question, the Road and Bridge Department handles general maintenance of county roadways and drainage11. Septic is the one construction-related permit Washington County does issue, through the Health Department rather than the Commission12.
Does Washington County have zoning?
No. Washington County has no zoning department and no confirmed zoning ordinance2. Alabama counties don't have broad, general land-use authority under state law the way municipalities do; only a handful of counties (Baldwin, Russell, Shelby, and Jefferson, by local law) have created their own planning and zoning authority, and Washington County is not among them13. Because the county has no zoning power over unincorporated land, there's no county-set minimum lot size, setback, lot-coverage limit, or building-height rule, and no zoning-based restriction on RVs, tiny homes, manufactured homes, accessory dwellings, or temporary camping on your own unincorporated land3. This is specific to unincorporated Washington County; if your parcel is inside Chatom or one of the county's other towns, check that town's own rules separately.
How do septic permits work in Washington County?
Septic systems in Washington County go through the county Health Department's Environmental Office, part of the statewide Alabama Department of Public Health onsite sewage program4. Anyone not connected to a public sanitary sewer must get a Permit to Install from the local health department before installing a new system or repairing an existing one, and construction can't start until that permit is issued14. Only about 8.6% of Washington County's soils have no severe limitations for a conventional septic drain field, so expect a real chance you'll need an engineered system: Alabama requires a registered engineer to design any system where soil percolation is slower than 60 minutes or a shallow limiting zone is present1516. Call the Health Department at 251-847-2245 and ask for the Environmental Office to start the process12.
Can you live in an RV or tiny home on your land in Washington County?
Yes, as far as county zoning is concerned: because Washington County has no zoning authority over unincorporated land, there's no county zoning rule restricting RV, tiny-home, or manufactured-home occupancy on your own unincorporated parcel3. A manufactured home is separately recognized statewide as a residence in Alabama as long as it meets the state's size definition (at least 8 feet wide and 40 feet long in traveling mode, or 320 square feet once erected) and carries a HUD Seal6. Keep in mind this covers zoning only: if you ever add plumbing or an onsite sewage system for an RV, tiny home, or manufactured home, that system still needs its own septic permit from the Health Department4.
Building on land in Washington County: the steps, in order
- Confirm your parcel is in unincorporated Washington County rather than inside Chatom or another town, since town rules are separate from the county's2.
- Decide whether you'll act as your own contractor under Alabama's owner-builder exemption or hire a licensed contractor5.
- Contact the Washington County Health Department's Environmental Office at 251-847-2245 to apply for a Permit to Install before you start any septic work1214.
- If soil testing shows slow percolation or a shallow limiting zone, plan for a registered engineer to design your system16.
- If your driveway will connect to a state highway, submit ALDOT Permit Form BM-111 to the District Administrator before building it; you pay the turnout costs17.
- If you'll disturb one acre or more of land, budget for ADEM's $1,385 construction stormwater permit application fee18.
- Call the County Commission Office at (251) 847-2208 with any remaining local question, since Washington County has no separate building or zoning office10.
What to check before you buy land in Washington County
Test the soil before you count on a standard septic system: only about 8.6% of the county's soils carry no severe limitations for a conventional drain field, so a percolation test matters here15. The land itself is gentler than that soil number suggests, with about 95.2% at 15% slope or less and 88.3% wooded, so finding a buildable site is usually not the hard part1920. Washington County has no zoning, so confirm any deed restrictions or easements yourself, since the county won't have a zoning file on the parcel2. If any part of the property sits in a mapped Special Flood Hazard Area, a floodplain development permit applies wherever the local community participates in the National Flood Insurance Program21. Property tax runs low here, with an effective rate near 0.2% and a median annual bill around $3572223.
Watch-outs
- No county building, planning, or zoning department was found for Washington County; if your project is unusual, confirm with the County Commission Office rather than assuming no rule applies101.
- The county's Wikidata-listed official website, washingtoncountyal.com, returns a bot-blocking error on a plain fetch; this guide instead verified contacts on wcalabama.com, the county's other official site10.
- Washington County's zoning-free status applies to unincorporated land only; confirm separately with Chatom or another town if your parcel is inside town limits3.
Sources
- Washington County, Alabama - Departments (2026 county census)
- Washington County, Alabama - Departments (2026 county census)
- Alabama law on county zoning and building authority
- Soil and Onsite Sewage (2026 county census)
- EXEMPTIONS – Home Builders Licensure Board (2026 county census)
- What is a manufactured home? (Alabama statewide rule), quoted and re-checked
- Alabama County Commissioners Handbook, 13th Edition (Alabama statewide rule), quoted and re-checked
- EXEMPTIONS – Home Builders Licensure Board, quoted and re-checked
- Exemptions — Alabama Home Builders Licensure Board, quoted and re-checked
- Washington County Commission (wcalabama.com)
- Washington County Road and Bridge Department (wcalabama.com)
- Washington County Health Department - Environmental Office (alabamapublichealth.gov)
- Alabama County Commissioners Handbook, 13th Edition (Alabama statewide rule), quoted and re-checked
- Can I Live On This Lot?, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Onsite Sewage Disposal (Alabama statewide rule), quoted and re-checked
- ALDOT Permit Manual (Alabama statewide rule), quoted and re-checked
- Do I Need Permit Coverage? (Alabama statewide rule), quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- My house is in a floodplain. What do I do if I want to build an addition or otherwise improve it? (Alabama statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
Written September 24, 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.