Unincorporated Franklin County, Tennessee requires a county building permit under its zoning resolution for construction, alteration, moving or filling1, although county government has not adopted a standard building code2. Winchester, Cowan, Decherd, Estill Springs, Huntland, Tullahoma and Monteagle have adopted standard codes, so inside those towns ask the town3. Septic permits come from TDEC rather than the county4.
At a glance
- Building permit
- Required for work governed by county zoning in unincorporated areas1
- Standard building code
- Not adopted by Franklin County government2
- Zoning
- County zoning applies in unincorporated Franklin County5
- Septic
- TDEC permit and final inspection required for installation or repair467
- Owner-builder
- Allowed for an owner’s own residence, subject to state conditions8
- RV or tiny-home living
- Not confirmed; ask Planning & Zoning about the parcel and proposed use9
- Floodplain development
- Development permit required before work in regulated flood areas10
Who to call
Building permits
Franklin County Planning & Zoning Department
Building permits, zoning, subdivision and floodplain questions for unincorporated Franklin County
1 South Jefferson Street, Basement Room 109, Winchester, TN 37398
Septic permits
TDEC Division of Water Resources — Columbia Environmental Field Office
Online septic applications and assistance for Franklin County
Also useful
Franklin County Planning and Zoning Department fee schedule
Published county planning, zoning and building-permit fees
Contact details are copied from each office’s official page and were checked against it on October 9, 2026.
Off-grid gear
Going off-grid in Franklin 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 Franklin County, Tennessee?
Yes. Unincorporated Franklin County requires a building permit before construction, alteration, repair, moving, a change of use, excavation or filling governed by the county zoning resolution begins1. The county government has not adopted a standard building code, but the county zoning permit requirement still applies21. The owner or agent must contact Planning & Zoning for an initial compliance inspection after staking the proposed footing location and again when the work is complete11. A conforming application is to be issued a permit within 3 days, and the permit becomes void after 12 months unless substantial progress has been made12. Starting before the permit is issued doubles the county fee1314.
Who issues Franklin County building permits, and how do you reach the office?
The Franklin County Planning & Zoning Department handles building permits and answers zoning, subdivision and floodplain questions for unincorporated Franklin County9. The office is at 1 South Jefferson Street, Basement Room 109, Winchester, TN 37398; call (931) 967-0981 or email ericbradford@franklincotn.gov9. The current county fee schedule lists $250 for a single-family home up to 1,000 square feet; larger single-family work is listed at $0.45 per conditioned square foot and $0.225 per non-conditioned square foot14. County fees are nonrefundable and double when work starts before the permit is obtained14. Winchester, Cowan, Decherd, Estill Springs, Huntland, Tullahoma and Monteagle have adopted standard building codes, so property inside those towns should start with the town rather than the county3. Septic permitting stays with TDEC wherever the property sits4.
Does Franklin County have zoning?
Franklin County zoning applies throughout the county’s unincorporated area, while incorporated municipalities may have separate rules5. Planning & Zoning maintains the district maps, so confirm the parcel’s district before relying on dimensional rules159. In R-1, a dwelling lot must contain at least 20,000 square feet and be at least 80 feet wide; a non-sewer lot may need more land for sanitary disposal16. R-1 principal structures are capped at 3 stories or 35 feet, and all structures together may cover no more than 40% of the lot1718. Agricultural uses and incidental buildings have a conditional exemption, but highway, airport, park, health, floodplain, septic and permit limits may still apply19.
How do septic permits work in Franklin County?
The Tennessee Department of Environment and Conservation administers septic permitting in Franklin County, and a permit is required to install or repair a subsurface sewage disposal system46. Apply through TDEC’s online septic portal; for assistance, contact the Columbia Environmental Field Office at 931-380-3371 or columbia.efo_adm@tn.gov20. Franklin County requires a septic permit, certificate of verification or other Tennessee-approved proof of sanitary-waste disposal before issuing the county building permit; a non-sewered subdivision lot must also reserve adequate area for a subsurface system21. TDEC requires the installer to notify the Division after installation and schedules the final inspection before the system is covered7. Only about 30.9% of county soils rate without severe limits for a conventional drain field, so establish septic feasibility before treating a homesite as buildable22.
Can you live in an RV or tiny home on land in Franklin County?
We could not confirm a complete rule for long-term RV occupancy, temporary camping or tiny-home occupancy in unincorporated Franklin County. Ask Planning & Zoning whether the proposed dwelling and occupancy are allowed in the parcel’s district before buying or moving a unit onto the land59. A tiny home does not bypass the general permit rule when the project involves regulated construction, moving or a change of use1. An accessory dwelling unit must be subordinate to a single-family home, located within an accessory structure, limited to 1,000 square feet and owner-occupied in either the main home or accessory unit; mobile homes cannot serve as accessory dwelling units23. Mobile homes are prohibited in R-1 and A-1, while other districts may differ24. Agricultural districts allow a residence including not more than 2 mobile homes for those owning and operating agricultural activities25. In a mapped Special Flood Hazard Area, an RV must be on site fewer than 180 consecutive days, be fully licensed and ready for highway use, or meet new-construction requirements26. A countywide minimum dwelling-floor-area rule remains unconfirmed; ask the office about the specific parcel9.
Building a home in Franklin County: the steps, in order
- Ask Planning & Zoning to confirm that the parcel is in unincorporated Franklin County and identify its zoning district515.
- Confirm that the proposed home and lot meet district rules; any subdivision plat needs final Planning Commission approval before recording1627.
- Apply to TDEC for the septic permit if the site will not use approved sewer, because the county requires sanitary-waste documentation before issuing its permit2120.
- Submit the county application with a dimensional sketch or scale plan showing the buildings and intended uses12.
- Obtain the county building permit before starting, since an early start doubles the fee114.
- After staking the footing location, request the initial county compliance inspection and contact Planning & Zoning again at completion11.
- For a newly created access easement, obtain Planning Commission review; a driveway entering state highway right-of-way also needs a TDOT permit2829.
What should you check before buying land in Franklin County?
Start with the zoning district, legal access, flood status, water source and septic feasibility. Franklin County requires compliance with its Floodplain District provisions for development in a mapped special-flood-hazard area; permits and elevation or floodproofing records may be required30. Newly created access easements must also be reasonably developable as determined by the Planning Commission28. About 30.9% of county soils rate without severe limitations for a conventional drain field, while about 64.6% of the land has a slope of 15% or less, so evaluate the actual homesite rather than countywide averages alone2231. We could not confirm the private-well permit rule; ask Planning & Zoning which state office should review a proposed well9. The effective property-tax rate is about 0.6%, and the median annual property-tax bill is about $1,2183233.
Watch-outs
- No locally adopted standard building code does not mean no permit: the Franklin County zoning permit and compliance inspections still apply in unincorporated areas2111.
- Do not start construction before the county permit is issued, because Franklin County doubles the applicable fee after work has begun1314.
- RV living, temporary camping, tiny-home occupancy, a countywide minimum dwelling size and private-well permitting remain unconfirmed; take the parcel number and proposed use to Planning & Zoning before committing to the land9.
Sources
- Building Permits, quoted and re-checked
- Building Codes, quoted and re-checked
- Codes, quoted and re-checked
- SSDS Frequently Asked Questions, quoted and re-checked
- Planning & Zoning Department, quoted and re-checked
- Subsurface Sewage Disposal System (SSDS) Permits, quoted and re-checked
- Subsurface Sewage Disposal System (SSDS) Frequently Asked Questions (Tennessee statewide rule), quoted and re-checked
- Tennessee Residential Permit FAQs, quoted and re-checked
- Franklin County Planning & Zoning Department (franklincotn.us)
- Franklin County Zoning Resolution Master, quoted and re-checked
- Franklin County Zoning Resolution Master, quoted and re-checked
- Franklin County Zoning Resolution Master, quoted and re-checked
- Building Permits, quoted and re-checked
- Franklin County Planning and Zoning Department fee schedule (franklincotn.us)
- Franklin County Zoning Resolution Master, quoted and re-checked
- Franklin County Zoning Resolution Master, quoted and re-checked
- Franklin County Zoning Resolution Master, quoted and re-checked
- Franklin County Zoning Resolution Master, quoted and re-checked
- Franklin County Zoning Resolution Master, quoted and re-checked
- TDEC Division of Water Resources — Columbia Environmental Field Office (franklincotn.us)
- Franklin County Zoning Resolution Master, 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
- franklincotn.us, quoted and re-checked
- Franklin County Zoning Resolution Master, quoted and re-checked
- Zoning Resolution Master, quoted and re-checked
- Zoning Resolution Master, quoted and re-checked
- Franklin County Subdivision Regulations, quoted and re-checked
- Franklin County Subdivision Regulations, quoted and re-checked
- Highway Entrance Permits (Tennessee statewide rule), quoted and re-checked
- Franklin County Subdivision Regulations, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
Written October 9, 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.