Lexington, Tennessee, in Henderson County, requires a city building permit before covered excavation, construction, moving or alteration begins.1 The city enforces zoning and its adopted building codes, while TDEC handles septic permits where public sewer is not used.234
At a glance
- Building permit
- Required before covered excavation, construction, moving or alteration1
- Zoning
- City zoning applies, with standards that vary by district56
- Septic
- TDEC permits and inspects systems where public sewer is not used47
- RV living
- General private-land occupancy is unconfirmed; flood-hazard sites have a specific city limit8
- Tiny homes
- No specific occupancy rule confirmed; zoning and building-code review still apply59
- Owner-builder
- No city-specific exemption confirmed; ask Planning & Codes before filing10
- Certificate of occupancy
- Required before using covered new or altered land or buildings11
Who to call
Building permits
City of Lexington Building and Planning Department
City building permits, code enforcement, zoning, floodplain rules, site plans and subdivision regulations
33 1st Street, Lexington, TN 38351
Septic permits
TDEC Jackson Environmental Field Office
Septic-related inquiries for Henderson County, including Lexington properties where onsite sewage disposal is available
1625 Hollywood Drive, Jackson, TN 38305
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 Lexington 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 Lexington, Tennessee?
Yes. Inside Lexington city limits, a city building permit is required before excavation for construction, construction of a building or accessory structure, or the moving or alteration of a building begins.12 The application must include a dimensional sketch or scale plan and the existing and intended uses, and the permit becomes void after six months unless substantial progress has been made.12
Lexington follows the 2024 International Building, Residential, Mechanical, Plumbing, Fuel Gas and Fire Codes.3 New construction also goes through city inspections, which must be coordinated with 24-hour notice.13 The city requires a certificate of occupancy before covered new or altered land or buildings may be used.11
Who issues building permits in Lexington, TN?
The City of Lexington Building and Planning Department enforces the building, zoning, flood, sign, site-plan and subdivision rules inside Lexington.14 The Building Inspector issues the city building permit when the proposed work conforms to the zoning ordinance and other city ordinances.1
Reach Planning & Codes at (731) 968-7091 or visit 33 1st Street, Lexington, TN 38351.15 The city publishes both a building-permit application and a new-construction process.16 Lexington's published process calls for a site plan to the City Planner, engineer drawings and plans in digital form plus one hard copy, a pre-construction meeting, and coordinated inspections.17 City building-permit fees were not confirmed in the available official material, so ask Planning & Codes for the current fee before submitting.
Does Lexington have zoning, and what does it mean for a home?
Lexington has municipal zoning inside city limits, and the Official Zoning Map establishes the district that controls a parcel.18 The ordinance includes residential, business, industrial, flood-hazard and sign districts, so a land listing's proposed use must be checked against its mapped district.6
In the R-1 Low Density Residential District, a dwelling lot requires at least 10,000 square feet, and the dwelling setbacks are 30 feet in front, 30 feet in the rear and 15 feet on each side for a one- or two-story home.1920 Buildings may cover no more than 35% of an R-1 lot for dwellings and accessory uses.21 In R-2, the first dwelling unit requires 7,500 square feet, plus 2,500 square feet for each additional unit.22
How do septic permits and sewer work inside Lexington?
TDEC handles septic approval for a Lexington property where public sewer is not used, and a septic-system permit is required for construction, modification or repair.423 Obtain the septic permit before dirt work or construction of the building pad begins.24 After installation, the installer contacts the local Environmental Scientist for a final inspection before the system is covered; an approved system receives a Certificate of Completion.7
For Henderson County septic questions, call the TDEC Jackson Environmental Field Office at 731-441-5593.25 Lexington generally does not allow septic tanks where sewer is available, although the municipal code contains an exception for certain older platted lots that obtain TDEC approval.26 New subdivision development inside city limits must provide sanitary sewer service to each lot and connect it to the public system.27
Can you live in an RV or tiny home in Lexington?
Lexington's general rule for living in an RV on private land could not be confirmed, so ask Planning & Codes about the parcel, zoning district and proposed duration before occupying one. The city does have a specific flood-hazard rule: an RV on an identified flood-hazard site must be present for fewer than 180 consecutive days, be fully licensed and ready for highway use, or satisfy the new-construction anchoring and elevation requirements for a longer placement.8
A separate tiny-home occupancy rule and a numeric minimum dwelling floor area could not be confirmed. Any tiny-home proposal still must fit Lexington's mapped zoning district and adopted building codes.528 Single-unit mobile homes are specifically allowed on individual lots in R-4 subject to Planning Commission-approved screening or fencing and other setup conditions.29
Building a home in Lexington: what are the steps?
- Ask Planning & Codes to confirm the parcel's zoning district, allowed use, lot size and setbacks.5
- Confirm whether public sewer is available; if onsite sewage is possible, obtain the TDEC septic permit before dirt work or building-pad construction.2624
- Submit the site plan, then provide the required engineer drawings and plans in digital form plus one hard copy.17
- Obtain the city building permit before covered excavation, construction, moving or alteration begins.1
- Coordinate city inspections with 24-hour notice, and arrange the septic inspection before covering an onsite system.307
- Complete the final city inspection and obtain the certificate of occupancy before using the completed home.11
What should you check before buying land in Lexington?
Verify the city-limit status, zoning district, allowed use, lot area, setbacks and legal street access before treating a Lexington parcel as buildable.531 A building lot generally needs access from a qualifying public street; a permanent access easement must be at least 50 feet wide and generally cannot serve more than one lot or tract.32
Check flood maps early because Lexington requires a development permit before development activity begins in designated flood-hazard areas.33 For county-level site context, 0% of Henderson County soils are rated without severe limitations for a conventional septic drain field, making parcel-level septic evaluation especially important where sewer cannot be used.34 Henderson County's effective property-tax rate is about 0.5%, and the median annual property-tax bill is $732.3536
Watch-outs
- A Lexington building permit becomes void after six months unless substantial progress has been made.12
- Do not assume an RV can be occupied on a private lot; the general city rule was not confirmed, and identified flood-hazard sites have a specific 180-day condition.8
- Septic tanks generally cannot be used where Lexington sewer is available, subject to a limited exception for certain older platted lots with TDEC approval.26
- Development in a mapped Lexington flood-hazard area requires a city development permit before work begins.37
Sources
- Building Inspector / Planning & Codes (Lexington), quoted and re-checked
- Planning & Codes (Lexington), quoted and re-checked
- Planning & Codes (Lexington), quoted and re-checked
- mtas.tennessee.edu (Lexington), quoted and re-checked
- Zoning Ordinance, Lexington, Tennessee (Lexington), quoted and re-checked
- Zoning Ordinance, Lexington, Tennessee (Lexington), quoted and re-checked
- tn.gov (Lexington), quoted and re-checked
- Zoning Ordinance, Lexington, Tennessee (Lexington), quoted and re-checked
- Lexington, TN Building and Planning Department (Lexington), quoted and re-checked
- Can I build my own home without a license? (Tennessee statewide rule), quoted and re-checked
- Building Inspector / Planning & Codes (Lexington), quoted and re-checked
- Zoning Ordinance, Lexington, Tennessee (Lexington), quoted and re-checked
- Coordinated Flow Chart for New Construction (Lexington), quoted and re-checked
- Planning & Codes (Lexington), quoted and re-checked
- City of Lexington Building and Planning Department (lexingtontn.gov)
- Planning & Codes (Lexington), quoted and re-checked
- Coordinated Flow Chart for New Construction (Lexington), quoted and re-checked
- Zoning Ordinance, Lexington, Tennessee (Lexington), quoted and re-checked
- Zoning Ordinance, Lexington, Tennessee (Lexington), quoted and re-checked
- Zoning Ordinance, Lexington, Tennessee (Lexington), quoted and re-checked
- Zoning Ordinance, Lexington, Tennessee (Lexington), quoted and re-checked
- lexingtontn.gov (Lexington), quoted and re-checked
- Online Application for Septic Related Services (Lexington), quoted and re-checked
- Subsurface Sewage Disposal System Frequently Asked Questions (Lexington), quoted and re-checked
- TDEC Jackson Environmental Field Office (tn.gov)
- Lexington Municipal Code (Lexington), quoted and re-checked
- Municipal-Regional Subdivision Regulations (Lexington), quoted and re-checked
- Planning & Codes — Current building code (Lexington), quoted and re-checked
- lexingtontn.gov (Lexington), quoted and re-checked
- Coordinated Flow Chart for New Construction (Lexington), quoted and re-checked
- Municipal-Regional Subdivision Regulations (Lexington), quoted and re-checked
- Municipal-Regional Subdivision Regulations (Lexington), quoted and re-checked
- Provisions Governing Flood Hazard Districts (Lexington), 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
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Provisions Governing Flood Hazard Districts (Lexington), quoted and re-checked
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.