Unincorporated Henry County, Tennessee does not require a county building permit and has no local zoning ordinance12. Municipalities may set their own building-permit and zoning rules, but TDEC still handles septic permits throughout Henry County34. State contractor-licensing rules and electrical inspection also apply56.
At a glance
- Building permit
- Not required in unincorporated Henry County; commercial businesses must still follow State Fire Codes1
- Zoning
- No county zoning or county zoning districts in unincorporated areas; municipalities may have separate rules78
- Septic permits
- Tennessee Department of Environment and Conservation (TDEC) issues the permit and does the perc test9
- RV / tiny home living
- Unrestricted by county zoning in unincorporated Henry County; septic and other state requirements still apply1011
- Owner-builder
- An owner may build one residence for personal use every two years, but hired work of $25,000 or more requires a licensed contractor5
- Minimum home size
- No county zoning-based minimum dwelling size in unincorporated Henry County; other construction, septic and safety requirements may still apply12
- Septic permit fee
- $400 for a new conventional system up to 1,000 gallons/day, $500 for an alternative system, no fee for a repair permit13
- Septic soil difficulty
- Only 7.8% of county soils are free of severe limits for a conventional drain field14
Who to call
Codes & inspections
Henry County Mayor's Office (Property Subdivision and Codes Enforcement)
Confirms building permits are not required and no zoning applies in unincorporated Henry County, and administers county subdivision review under the Henry County Subdivision Bylaws and Regulations
Septic permits
Septic System Construction Permits, soil perc testing, and final inspections for Henry County
Contact details are copied from each office’s official page and were checked against it on October 7, 2026.
Off-grid gear
Going off-grid in Henry 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.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Henry County, Tennessee?
No. A county building permit is not required in unincorporated Henry County, but commercial businesses must follow State of Tennessee Fire Codes1. Under Tennessee's owner-builder licensing exemption, an owner may construct one residence every two years for personal use, not for resale, lease or rent; anyone hired for a portion costing $25,000 or more must be licensed5. Any electrical connection to the local electric company needs inspection by the State Electrical Inspector6. Henry County is an opt-out jurisdiction for residential code administration15. An owner or contractor may nevertheless obtain an optional state building permit and request a State Fire Marshal inspection16. If the inspected dwelling meets statewide building-construction safety standards, the State Fire Marshal's Office can issue a Certificate of Occupancy17.
Who issues building and septic permits in Henry County?
Henry County does not issue building permits for construction in unincorporated areas6. The Henry County Mayor's Office handles property subdivision and codes enforcement, including county subdivision review for a tract split1819. Inside a municipality, ask that municipality whether it requires a building permit or zoning approval; the county's no-building-permit and no-zoning rules apply only to unincorporated land13. Septic authority does not shift to the municipality: TDEC's Division of Water Resources handles septic permits, soil evaluation and final septic inspection throughout Henry County204. Commercial businesses must follow State Fire Codes, and electrical connections need State Electrical Inspector approval before connection to the local electric company6.
Does Henry County have zoning?
Unincorporated Henry County has no county zoning ordinance or county-administered zoning districts78. Henry County therefore sets no zoning-based minimum dwelling size there, although construction, septic, health, subdivision and safety requirements can still apply12. County zoning also sets no minimum lot size, setbacks, lot coverage or building-height limit and does not restrict accessory dwellings, RVs, tiny homes, manufactured homes or temporary camping10. Tennessee's agricultural zoning exemption is not a blanket waiver: where county zoning applies, the land must be devoted to agriculture and the structure incidental to that enterprise, with exclusions including floodplain land and sites near specified public facilities21. These answers do not govern municipalities3.
How do septic permits work in Henry County?
Every new septic installation, modification or repair in Henry County needs a TDEC permit before work begins, including an off-grid home11. Obtain septic approval before dirt work or construction of the building pad11. A conventional system costs $400 up to 1,000 gallons per day design flow, plus $100 for each additional 1,000 gpd; an alternative system costs $500 up to 1,000 gpd, plus $150 for each additional 1,000 gpd; and a repair permit has no permit fee13. Only 7.8% of Henry County's land is free of severe limitations for a conventional drain field14. An alternative system requires an extra-high-intensity soils map prepared by a Tennessee-licensed soils consultant before TDEC evaluates it11. After installation, the installer schedules TDEC's final inspection before covering the system2022.
Can you live in an RV or tiny home on your land in Henry County?
Yes, county zoning does not restrict RV, tiny-home, manufactured-home or temporary-camping occupancy on unincorporated Henry County land10. Henry County also sets no zoning-based minimum dwelling size there, but that does not remove building, septic, health, subdivision or safety requirements12. Inside a municipality, ask the municipality about building permits and zoning approval; TDEC remains responsible for septic permits throughout Henry County34. Any septic or alternative subsurface system for an off-grid residence needs TDEC permitting and soil evaluation before dirt work or building-pad construction11. When an eligible utility has sewer in the abutting public way, it may require an occupied building to connect and stop using another sewage-disposal method23. Confirm sanitation approval with TDEC and sewer availability with the serving utility before occupancy.
What are the steps to build a home in Henry County?
- Confirm the parcel is outside an incorporated municipality; Henry County's no-building-permit and no-zoning answers apply only to unincorporated land17.
- Check the flood map and ask the county floodplain administrator whether local review is required before development24.
- If the project divides a tract, take the proposal to the County Mayor's Office for subdivision review19.
- Request the TDEC septic site evaluation and septic permit before dirt work or building-pad construction11.
- If building for yourself, confirm the state owner-builder exemption: it covers one residence every two years for your own use, not resale, lease or rent, and hired work of $25,000 or more requires a licensed contractor5.
- Obtain a TDOT driveway permit before constructing access on state-highway right-of-way25. Ask the relevant road authority about access from another road.
- Decide whether to request the optional State Fire Marshal building inspection, then arrange State Electrical Inspector approval for the utility connection166.
What should you check before buying land in Henry County?
Start with septic feasibility: only 7.8% of Henry County soils are free of severe limits for a conventional drain field, so obtain a site evaluation before fixing the house location or price14. Check whether any building area lies in a mapped floodplain because local review may be required and requirements vary by community24. Confirm whether the parcel is inside a municipality, since the county's no-permit and no-zoning rules apply only to unincorporated land12. On unincorporated land, county zoning sets no minimum lot size or setback, but a recently divided tract may still need county subdivision review1019. A driveway within state-highway right-of-way needs a TDOT permit25. We could not confirm a countywide public-water or sewer connection rule or a separate owner permit for a private domestic well; ask the serving utility and TDEC before relying on private systems.
Watch-outs
- Henry County is listed as an "opt-out" jurisdiction for Tennessee's state residential building-permit program, so a state building permit and inspection are available on request but not required; don't assume a State Fire Marshal permit is mandatory here16.
- Development in or near a regulated mapped floodplain may require local review before work begins; requirements vary by community, so contact the county floodplain administrator for land outside city limits24.
- We could not confirm Henry County rules for short-term rentals, a separate owner permit for a domestic well, or a countywide water or sewer connection mandate; ask the County Mayor's Office, TDEC and the serving utility before relying on any of those assumptions1820.
Sources
- Property Subdivision and Codes Enforcement – Henry County, quoted and re-checked
- Property Subdivision and Codes Enforcement – Henry County, quoted and re-checked
- Property Subdivision and Codes Enforcement – Henry County (2026 county census)
- Online Application for Septic Related Services, quoted and re-checked
- tn.gov, quoted and re-checked
- Property Subdivision and Codes Enforcement – Henry County, quoted and re-checked
- Property Subdivision and Codes Enforcement – Henry County, quoted and re-checked
- Property Subdivision and Codes Enforcement – Henry County, quoted and re-checked
- TDEC - Subsurface Sewage Disposal Systems (SSDS) (2026 county census)
- Tennessee law on county zoning and building authority
- Property Subdivision and Codes Enforcement – Henry County, quoted and re-checked
- Property Subdivision and Codes Enforcement, quoted and re-checked
- Septic System Construction Permit, 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
- Property Subdivision and Codes Enforcement, quoted and re-checked
- Tennessee Fire Marshal’s Office Residential Permits Residential Jurisdictions & Inspectors, quoted and re-checked
- Tennessee Fire Marshal’s Office Residential Permits Residential Jurisdictions & Inspectors, quoted and re-checked
- Henry County Mayor's Office (Property Subdivision and Codes Enforcement) (henrycountytn.org)
- Property Subdivision and Codes Enforcement – Henry County, quoted and re-checked
- Tennessee Department of Environment and Conservation (TDEC), Division of Water Resources - Subsurface Sewage Disposal Systems (tn.gov)
- Exemption from County Zoning Regulation for Buildings on Land Used for Agriculture, quoted and re-checked
- Subsurface Sewage Disposal System Frequently Asked Questions, quoted and re-checked
- Utility Customers Frequently Asked Questions (Tennessee statewide rule), quoted and re-checked
- Statewide Floodplain Administrator Directory, quoted and re-checked
- Rules of the Tennessee Department of Transportation, Chapter 1680-10-01: Constructing Driveway Entrances on State Highway Rights-of-Way, quoted and re-checked
Written October 7, 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.