Unincorporated St. Clair County, Alabama requires no county building permit and has no county zoning ordinance12. Municipal building-code and zoning requirements vary by address34. The St. Clair County Health Department handles septic permits countywide; floodplain development permits and subdivision approval remain separate requirements where applicable567.
At a glance
- Building permit
- Not required in unincorporated St. Clair County1
- Zoning
- None in unincorporated areas; municipal rules vary24
- Building codes
- Coverage varies by project type and municipal jurisdiction38
- Septic permit
- St. Clair County Health Department permit required before new work or a non-waived repair59
- Owner-builder licensing
- Exempt if you act as your own contractor and personally supervise a home for your own use10
- Agricultural building licensing
- Exempt, except for any residence within the building11
- Floodplain development permit
- Required before development in identified flood-hazard areas612
- Subdivision regulations
- Development approval and published fees apply in the county's subdivision jurisdiction713
Who to call
Also useful
County policy, the county's written position on zoning/permits/certificate of occupancy, and the first call for anything not assigned to another county office
165 5th Avenue Suite 100, Ashville, AL 35953
Septic permits
St. Clair County Health Department (Environmental Services)
Onsite sewage (septic) applications and permits, septic tank and grease trap permits, and private well water testing for St. Clair County
1175 23rd Street North, Pell City, AL 35125
Roads & driveways
St. Clair County Engineer / Road Department
Road right-of-way and utility permits, floodplain development permits (per the county commission's letter) and countywide subdivision regulations
31588 Highway 231, Ashville, AL 35953
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 St. Clair County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
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Do you need a building permit in St. Clair County, Alabama?
No county building permit or county certificate of occupancy is required in unincorporated St. Clair County114. An owner can build without seeking a county building-permit exemption, although state licensing rules for electrical, plumbing and HVAC work may still apply15. Floodplain development permits, septic permits and subdivision approval remain separate requirements where applicable6167. Alabama’s State Building Code covers specified projects, including state-owned or state-funded work, schools, hotels, motels and movie theaters; the Division of Construction Management does not have jurisdiction over ordinary residential property17. The county’s no-building-permit letter does not establish that no residential building code applies; ask the County Commission about the code applicable to an unincorporated home318.
Who issues building permits in St. Clair County?
For unincorporated St. Clair County, reach the County Commission at (205) 594-2100, 165 5th Avenue Suite 100, Ashville, AL 35953, for its written building-permit and zoning position18. The County Engineer handles floodplain development applications and county subdivision review; reach the Road Department at 205-594-2190, 31588 Highway 231, Ashville, AL 35953121920. Moody issues municipal building permits, as do Trussville and Leeds, cities mainly in Jefferson County that reach into St. Clair County212223. Septic permits for addresses in the St. Clair County portions remain with the St. Clair County Health Department5. Springville has adopted residential and commercial building codes, and Pell City enforces municipal building codes and inspections824.
Does St. Clair County have zoning?
Unincorporated St. Clair County has no county zoning ordinance; Pell City has municipal zoning within its corporate limits4. Moody sets its own zoning, as do Trussville and Leeds, cities mainly in Jefferson County that extend into St. Clair County252627. Septic permitting for land in St. Clair County stays with the St. Clair County Health Department5. In unincorporated St. Clair County, county zoning sets no minimum dwelling size, minimum lot size, setbacks, lot coverage or building height and does not prohibit accessory dwellings, tiny-home occupancy or temporary camping28. Floodplain, septic and subdivision requirements can still control a project6167. Confirm municipal planning jurisdiction with the County Engineer before relying on the county subdivision rules29.
How do septic permits work in St. Clair County?
The St. Clair County Health Department handles onsite sewage applications and septic permits throughout St. Clair County, including addresses inside cities5. A property not connected to public sewer needs a local Health Department permit before a new system or a non-waived repair; site evaluation, soil testing, professional design and licensed installation may apply, and some lots are unsuitable for onsite sewage disposal916. The usual process includes an installation inspection and Approval for Use before occupancy30. An engineered small-flow system submitted on the CEP-2 application is different: the Health Department reviews it for completeness, but the professional engineer is responsible for compliant installation and no Health Department site visit or installation inspection occurs31. A qualifying conventional dwelling repair may use a signed and notarized waiver granted before work begins; the repair is not inspected and no Approval for Use is issued3233. Only about 19% of county soils rate without severe limits for a conventional drain field34.
Can you live in an RV or tiny home on your land in St. Clair County?
An occupied off-grid home in St. Clair County needs lawful sewage disposal, and some lots are unsuitable for an onsite system16. In an identified flood-hazard area, an RV must either remain for fewer than 180 consecutive days while licensed, highway-ready and free of permanent attachments, or meet the ordinance's new-construction standards35. A manufactured home in a flood-hazard area must be securely anchored and satisfy the applicable elevation standard36. Outside flood-hazard areas, we could not confirm a general county rule for long-term RV occupancy; ask the County Commission before treating an RV as a residence18. Inside Pell City, municipal zoning and building-code requirements apply, while septic permits remain with the St. Clair County Health Department37245.
Building a home in St. Clair County: the steps, in order
- Confirm whether the parcel is unincorporated, inside a city or within a municipal planning jurisdiction because building permits, zoning and subdivision authority can differ13729.
- If the property is being divided, contact the County Engineer before offering lots; county subdivision rules apply in unincorporated areas, subject to municipal planning jurisdiction729.
- Ask the County Engineer whether the site is in an identified flood-hazard area and obtain the floodplain development permit before covered work starts612.
- Have the site and soil evaluated, then obtain the septic permit from the St. Clair County Health Department before new onsite sewage work begins59.
- Use the owner-builder path only if you will act as contractor, personally supervise the home and build it for your own use rather than for sale10.
- Obtain an ALDOT turnout permit before building access onto a state highway38.
- Complete the applicable septic closeout: the usual path requires inspection and Approval for Use, while the repair waiver means no inspection or Approval for Use3033.
What to check before you buy land in St. Clair County
Start with sewage feasibility: only about 19% of St. Clair County soils rate without severe limits for a conventional drain field, and some sites cannot support onsite sewage disposal3416. Check flood status with the County Engineer because development in an identified flood-hazard area needs a floodplain development permit before work begins612. For a proposed land split in the county's subdivision jurisdiction, budget a $25 Permit to Develop fee, a $200 minor-subdivision review fee, or a $500 major-subdivision fee plus $50 per lot or site13. Subdivision review fees are estimates reconciled against actual inspection and testing costs, so the published schedule is not a total-cost ceiling13. A municipal planning commission may instead have territorial jurisdiction, and county involvement there can be waived or limited to plat approval rather than enforcement29. A driveway connecting to a state highway needs an ALDOT turnout permit38. St. Clair County's effective property-tax rate is about 0.3%, and the median annual property-tax bill is about $6663940.
Watch-outs
- No county building permit does not mean no building code: county residential-code adoption remains unconfirmed, while Springville and Pell City have municipal code requirements3824.
- A qualifying conventional dwelling repair may use a signed and notarized waiver, but the repair will not be inspected and no Approval for Use will be issued3233.
- Off-grid sewage rules do not establish approval for composting toilets or holding tanks; ask the St. Clair County Health Department about the proposed system165.
Sources
- Zoning Restrictions in unincorporated areas of St. Clair County, quoted and re-checked
- Zoning for unincorporated parts of St. Clair County, quoted and re-checked
- Zoning Restrictions in unincorporated areas of St. Clair County, quoted and re-checked
- Zoning for unincorporated parts of St. Clair County, quoted and re-checked
- Environmental Services, quoted and re-checked
- February 2020 Flood Damage Prevention Ordinance, quoted and re-checked
- Subdivision Regulations, quoted and re-checked
- Inspections — City of Springville, quoted and re-checked
- Onsite Sewage Disposal, quoted and re-checked
- Exemptions – Home Builders Licensure Board, quoted and re-checked
- Home Builders Licensure Law, quoted and re-checked
- February 2020 Flood Damage Prevention Ordinance, quoted and re-checked
- County Engineer / Road Department, quoted and re-checked
- Zoning for unincorporated parts of St. Clair County, quoted and re-checked
- Alabama law on county zoning and building authority
- Onsite Sewage Disposal, quoted and re-checked
- State Building Code, quoted and re-checked
- St. Clair County Commission (stclairco.com)
- Subdivision Regulations, St. Clair County, Alabama, quoted and re-checked
- St. Clair County Engineer / Road Department (stclairco.com)
- Moody: Inspection | City of Moody (St. Clair County), quoted and re-checked
- Trussville: Licenses & Permits - City of Trussville (St. Clair County), quoted and re-checked
- Leeds: official source (St. Clair County), quoted and re-checked
- Inspections and Building Permits, quoted and re-checked
- Moody: Inspection | City of Moody (St. Clair County), quoted and re-checked
- Trussville: Trussville Code of Ordinances, Appendix A, Sec. 1.0 A-1 Agriculture district (St. Clair County), quoted and re-checked
- Leeds: City of Leeds Zoning Ordinance (St. Clair County), quoted and re-checked
- Alabama law on county zoning and building authority
- Subdivision Regulations, St. Clair County, Alabama, quoted and re-checked
- Onsite Sewage Disposal, quoted and re-checked
- CEP-2 Application for a Permit to Install (Repair) a Small-Flow Onsite Sewage Disposal System, quoted and re-checked
- Waiver of a Permit to Repair a Conventional Onsite Sewage Disposal System, quoted and re-checked
- Onsite Repair Procedures, quoted and re-checked
- 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
- February 2020 Flood Damage Prevention Ordinance, quoted and re-checked
- February 2020 Flood Damage Prevention Ordinance, quoted and re-checked
- Pell City Zoning Ordinance / Land Use Regulations, quoted and re-checked
- ALDOT Permit Manual (Alabama statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
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.