Building permits, zoning and land rules in Sumner County, Tennessee

Yes. Unincorporated Sumner County, Tennessee requires a residential building permit, subject to the adopted code's listed exemptions¹. Sumner County Building & Codes administers plan review, permitting and inspections, and every new-construction application also goes through zoning review^1,3,4. The required inspection sequence runs from footing and underground plumbing through foundation, sill plate and waterproofing, rough-in, framing, and final plumbing, mechanical and structural inspections¹⁰. A residential dwelling cannot be occupied until the permit holder requests a final inspection, the county performs it and Building & Codes issues a certificate of occupancy³.

A Tennessee owner may build a single residence for personal use without a contractor license, limited to one permit every two years; the home cannot be for sale, lease or rent⁸. Anyone the owner pays more than $25,000 is a prime contractor who must be licensed⁸. County zoning generally cannot regulate a building that is incidental to an agricultural enterprise on agricultural land, but the state exemption has location exceptions, including the one-hundred-year floodplain¹¹.

An agricultural exemption applies only to the specific use described in a submitted Zoning Compliance application, not to the property generally, and an agricultural structure in the 100-year floodplain must still meet FEMA elevation or floodproofing rules¹².

The Sumner County Building & Codes Department is at 355 N. Belvedere Drive, Room 208, Gallatin, TN 37066, phone (615) 452-1467⁴. Contact that office about building permits, plan review, inspections and certificates of occupancy^3,4. The county publishes a new-construction permit process and supporting planning and zoning documents⁵.

Sumner County Planning & Zoning is at 355 N. Belvedere Dr., Room 202, phone (615) 451-6097⁵. Engineering & Floodplain Administration uses the same address and phone number and coordinates development in designated FEMA flood zones¹³. TDEC, rather than the county, handles septic permitting and inspections; applications are online at tdec.tn.gov/septic^2,14. The Sumner County Highway Department handles work on county road rights-of-way, while a driveway on state highway right-of-way requires a TDOT permit^15,16.

Yes. Sumner County zoning applies to land use and new construction in the county's unincorporated planning area; incorporated municipalities may administer their own rules^1,6. The county publishes its zoning resolution, zoning districts and map, and the current resolution is listed as effective 12/8/25⁵. Sumner County also regulates subdivision proposals, so a tract's zoning does not by itself establish that it can be divided⁵.

Development limits depend on the parcel's district and use. Maximum building height is district-specific, with the Agricultural Reserve and Rural Residential tables listing 35 feet¹. Maximum lot coverage is also district-specific; residential development in those two districts is listed at 20%¹. Minimum residential lot sizes depend on the district: 15 acres in AR, 40,000 square feet in RR and 20,000 square feet in SR¹. The AR district front, rear and side setbacks are 75, 30 and 20 feet, and a five-foot setback from recorded easements generally applies¹. An accessory dwelling unit must be at least 300 square feet, one is allowed per lot with an owner living on site, and a lot with septic needs at least 40,000 square feet¹. New mobile homes are allowed only in the AR and MHC districts, or as an accessory unit by special exception on at least five acres with medical-hardship documentation¹. Ask Planning & Zoning to confirm the current district, permitted use, setbacks, height, coverage and subdivision path before designing around a parcel⁵. Sumner County's mobile-home instructions separately require setbacks to conform to zoning¹⁷.

TDEC, not Sumner County, administers septic permits and inspections². A permit is required to construct, modify or repair a septic system, and a TDEC Environmental Scientist evaluates the site to determine the required system type². Apply online at tdec.tn.gov/septic before committing to a house location¹⁴. For the county building permit, a septic property needs septic approval and a valid permit or affidavit of disclosure; a property using sewer instead needs a paid sewer-tap receipt².

When installation is complete, the installer must schedule TDEC's final inspection before covering the system; approval results in a Certificate of Completion². Only 21.1% of Sumner County soils avoid a severe limitation rating for a conventional drain field, so make the site evaluation an early purchase contingency⁹. The county requires environmental completion documentation before issuing the certificate of occupancy where it applies².

Sumner County does not allow recreational vehicles or camping trailers to be used for living, sleeping or housekeeping on residential lots except under its temporary-use rules⁶. A bona fide visit by relatives or invited guests may last no more than 14 days per visit in a calendar year⁶. Temporary occupancy during construction, renovation, or recovery from fire or natural disaster requires a temporary-use permit and approved water, sewer and electric service⁶.

Sumner County treats a tiny home on a trailer frame as a recreational vehicle and does not allow it as a permanent residence¹. A tiny home on skids must be secured to a permanent foundation and anchored against wind uplift, and a newly constructed tiny home needs a certificate of occupancy before anyone moves in¹. A delivered, preassembled tiny home goes through the State Fire Marshal's modular-building inspection program¹⁸. We could not confirm a countywide minimum dwelling size, so ask Planning & Zoning about the parcel's district⁵.

1. Ask Sumner County Planning & Zoning to confirm the parcel's district, use, setbacks, height, lot coverage and subdivision status^1,5.
2. If the site is in a designated FEMA flood zone, obtain county floodplain review before development¹³.
3. Secure TDEC septic approval or a paid sewer-tap receipt, plus a water-tap receipt or water-well driller's report^2,19.
4. Obtain the county-road driveway permit when applicable; the Highway Department checks the proposed connection with Stormwater Management¹⁵. A state-highway driveway instead requires a TDOT permit¹⁶.
5. Submit the county permit packet with the required property records, site plan, construction plans, contractor credentials when applicable, land-disturbance documents, zoning packet and tax documentation¹⁹.
6. Schedule county building inspections and TDEC's final septic inspection before the system is covered^2,3.
7. Request the final building inspection and obtain the certificate of occupancy before moving in³.

Confirm the parcel's zoning district and subdivision history before paying for development potential; Sumner County publishes the district framework and regulates land subdivision in unincorporated areas⁵. Confirm buildable area as well as use because height and lot-coverage limits vary by district¹.

Make septic feasibility a purchase contingency: only 21.1% of Sumner County soils avoid a severe limitation rating for a conventional drain field, and TDEC determines the system type through a site evaluation^2,9. Confirm whether the parcel can document a water tap or well-driller's report and either septic approval or a sewer tap for the permit packet¹⁹. Development in a designated FEMA flood zone requires county coordination and review¹³.

Confirm which agency owns the road before assuming access is settled: county-road connections require the county process, while state-highway connections require TDOT approval^15,16. Ask Building & Codes for current permit charges and the Adequate Facilities Tax before budgeting⁴.