Bolthole Index

Obion County, Tennessee

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

75Index Score / 100
#31 of 95 in Tennessee

Unincorporated Obion County, Tennessee requires a building permit, even though the county has no building code outside city limits.12 Get the county permit from the Obion County Assessor’s Office; septic construction, modification and repair require a separate state permit through the Tennessee Department of Environment and Conservation.34

At a glance

Building permit
Required in unincorporated Obion County1
Building code
No county code outside city limits; cities have their own codes2
Zoning
No zoning code in unincorporated Obion County5
Septic
TDEC permit required for construction, modification or repair64
Owner-builder
Allowed for an owner’s individual-use residence, subject to state conditions7

Who to call

Building permits

Obion County Assessor of Property

Building and demolition permits for property in unincorporated Obion County

(731) 507-0999 Ext.#4

4 Bill Burnett Circle, PO Box 327, Union City, TN 38281

Septic permits

TDEC Jackson Environmental Field Office

Septic-related inquiries and Division of Water Resources services for Obion County

731-441-5593

1625 Hollywood Drive, Jackson, TN 38305

Online permits →

Contact details are copied from each office’s official page and were checked against it on September 27, 2026.

Do you need a building permit in Obion County, Tennessee?

Yes. Buildings and related work in unincorporated Obion County require a building permit, and the county directs applicants to the Assessor’s Office in the courthouse.1 The Assessor says permits are used for new buildings and remodels, demolition permits remove buildings from the records, and applicants should obtain permits for room additions, repairs after storm or flood damage, and new-home construction.8

The permit requirement does not mean the county has adopted a building code: Obion County says each city has its own codes, while no county code exists outside city limits.2 A parcel inside Union City or another municipality therefore needs a city-specific answer rather than the unincorporated-county answer.2

Who handles building permits in Obion County?

The Obion County Assessor of Property is the building-permit contact for a house or building located in unincorporated Obion County.8 Call the office at (731) 507-0999 Ext.#4 or visit 4 Bill Burnett Circle in Union City; the office page also lists PO Box 327, Union City, TN 38281.8

Tell the office the parcel location and describe the proposed new building, remodel, room addition, repair or demolition, because those are the project types the Assessor identifies on its permit page.8 For land inside a city, contact that city’s building office instead; Obion County’s own guidance specifically routes Union City properties to the Union City Building Department.8

Does Obion County have zoning?

Unincorporated Obion County has no zoning code, and the county also says no building code exists outside city limits.52 That does not cancel the county building-permit requirement or the separate state septic rules.14

The no-zoning answer is limited to land outside municipal limits; each city in Obion County has its own codes.2 We could not confirm countywide rules for minimum home size, setbacks, subdivision approval, short-term rentals or floodplain development. Before treating a parcel as buildable, give the Assessor the parcel number and ask whether another county, city, floodplain or utility approval applies to the specific site.

How do septic permits work in Obion County?

TDEC administers septic permits for Obion County through the Jackson Environmental Field Office.6 A permit is required to construct, modify or repair a septic system, and the installer must arrange a final inspection before covering the completed system.49

Applications may be filed online or on paper with the appropriate field office; review generally takes 10 days and must finish within 45 days after submission.10 The conventional-system permit is $400 for design flow up to 1,000 gallons per day, with a $100 construction inspection; alternative systems begin with a $500 permit and a $200 inspection.11 Only 12.2% of county soils are rated without severe limits for a conventional drain field, so make the site evaluation an early contingency.12 Call TDEC’s septic-inquiry line at 731-441-5593.13

Can you live in an RV or tiny home in Obion County?

We could not confirm an unincorporated Obion County rule that allows or prohibits living in an RV on private land, or a rule that sets a minimum size for a tiny home. No county zoning code exists outside city limits, but the county still requires a building permit and Tennessee still requires a permitted septic system for construction, modification or repair.514

Before buying, ask the Obion County Assessor whether the proposed structure needs a county permit and ask TDEC how the planned wastewater arrangement can be approved.813 If the parcel abuts a street with sanitary sewer, a qualifying utility system may have authority to require the building to connect and stop using another sewage-disposal method.14 City rules require a separate check for parcels inside municipal limits.2

Building a home in Obion County: what are the steps?

  1. Confirm that the parcel is outside city limits, because cities have their own codes while unincorporated Obion County has no county building code.2
  2. Call the Obion County Assessor and obtain the required county building permit.18
  3. Apply to TDEC for the septic construction permit before installation or repair, allowing for the published review period.410
  4. If access will be built or changed on state highway right-of-way, obtain the required TDOT highway-entrance permit.15
  5. If building for your own use, confirm the owner-builder conditions: one permit every two years, no sale, lease or rent, and licensing rules for hired prime contractors.7
  6. Have the septic installer arrange TDEC’s final inspection before covering the system.9

What should you check before buying land in Obion County?

Start with jurisdiction: a city parcel follows city codes, while unincorporated Obion County has no county zoning or building code but still requires a building permit.521 Then make the purchase contingent on a workable wastewater plan, because only 12.2% of soils are rated without severe limits for a conventional drain field.12

Confirm legal road access and whether a proposed entrance touches state highway right-of-way, where a TDOT permit is required.15 Ask the relevant utility whether sewer service is available and whether connection is mandatory for the parcel.14 We could not confirm the county’s private-well, floodplain-development or county-road driveway requirements; ask TDEC about wells, the Assessor about parcel-specific approvals, and the road authority that maintains the frontage before closing.

Watch-outs

  • A county building permit is still required even though unincorporated Obion County has no county building code or zoning code.125
  • Do not cover a permitted septic installation until the installer has arranged the required final inspection.9
  • Rules inside an Obion County city differ from the unincorporated-county rules because each city has its own codes.2

Sources

  1. Frequently Asked Questions, quoted and re-checked
  2. Frequently Asked Questions, quoted and re-checked
  3. Frequently Asked Questions (2026 county census)
  4. Septic System Construction Permit, quoted and re-checked
  5. Obion County, TN - FAQs (2026 county census)
  6. Septic System Construction Permit, quoted and re-checked
  7. Can I build my own home without a license? (Tennessee statewide rule), quoted and re-checked
  8. Obion County Assessor of Property (obioncountytn.gov)
  9. Subsurface Sewage Disposal System Frequently Asked Questions, quoted and re-checked
  10. Septic System Construction Permit, quoted and re-checked
  11. Septic System Construction Permit, quoted and re-checked
  12. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  13. TDEC Jackson Environmental Field Office (tn.gov)
  14. Utility Customers Frequently Asked Questions (Tennessee statewide rule), quoted and re-checked
  15. Highway Entrance Permits (Tennessee statewide rule), quoted and re-checked

Written September 27, 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.

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County locator

Obion County in Tennessee

75
County map
Obion County highlighted among the Tennessee counties · colored by Index score

How Obion County scores

Seclusion57100% ev.
Self-Sufficiency72100% ev.
Admin Boringness64100% ev.
Durability49100% ev.
Property Autonomy71100% ev.
Carry Cost86100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$168kTypical home
0.6%Property tax
$4,192Land / acre
52.9"Annual rain
7.4% of yrsSevere drought
12.5 / yr (+11.5)Mid-century 100°F days
16.2 daysMid-century dry spell
2.48" (+7.8%)Mid-century 1-day rain
1.63×Wildfire change factor
100%Forward climate coverage
$1,881Home insurance / yr
0.2% / yrInsurance growth
0.99%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
31,288People within 30 min
1,102,038People within 2 hr
37,724Radius comparison (15 mi)
55.8People / sq mi
0.3%Federal land
81.7%Land at 15% slope or less
12.2%Septic soil without severe limits
41,062 acWorkable land screen
32.6%Wooded land
88.1 tonsBiomass / forest ac
58.9°FAvg temp

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Answers from the rulebook for Obion County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Obion County rules

  • Building permitRequired

    Buildings and related work in unincorporated Obion County.

    • The FAQ states a permit is required even though no county building code exists outside city limits.
    • Permits can be obtained from the Obion County Assessor’s Office in the courthouse.
    “Outside of city limits, no code exists. However, you do need to pull a building permit.”
  • Building code adoptedNot adopted

    County building code in unincorporated Obion County.

    • Municipal building codes may apply inside city limits.
    “Each city in the county has its own codes. Outside of city limits, no code exists.”
  • County-wide zoningAbsent

    Per the county FAQ, each city has its own codes but outside city limits no zoning code exists, so unincorporated Obion County is not zoned.

    Obion County, TN - FAQs ↗Scouted from the county site, not yet independently re-checked

Tennessee rules that apply here

  • Owner-builder exemptionConditional

    A Tennessee property owner constructing a single residence for the owner's individual use.

    • The owner may have one permit every two years.
    • The residence must not be for sale, lease, or rent.
    • If the owner hires a contractor, the contractor is a prime and must be licensed and obtain the building permit for inspections.
    • Contracts may not be split into phases to circumvent the licensing law.
    • Anyone paid more than $25,000 by the owner is considered a prime and must be licensed.
    • The exemption is based on TCA 62-6-103 and Rule 0680-1-.22.

    owner permits: per 1 permit per two years · contractor payment threshold: > 25000 USD (Anyone paid in excess of this amount is considered a prime and must be licensed.)

    “one permit every two years to build their home as long as it is not for sale, lease, or rent (individual use).”
  • Certificate of occupancyLimited

    Certificates of occupancy for one- and two-family dwellings in Tennessee opt-out or non-code jurisdictions when the State Fire Marshal's Office inspects the dwelling during construction.

    • The owner or contractor may obtain a state building permit to request the inspection.
    • The Certificate of Occupancy is released only if the dwelling is determined to meet statewide building construction safety standards.
    • The source describes this process for opt-out or non-code jurisdictions and for new construction or additions to existing homes.
    “determined to meet the statewide building construction safety standards, the State Fire Marshal’s Office will release a Certificate of Occupancy”
  • Who permits septicState (with conditions)

    Subsurface sewage disposal systems serving property in Obion County.

    • TDEC administers the state septic program through the Division of Water Resources and the appropriate Environmental Field Office.
    • The Jackson Environmental Field Office lists Obion among its counties served.
    “Benton, Carroll, Decatur, Dyer, Hardin, Haywood, Lake Lauderdale, Obion, Weakley, Chester, Crockett, Gibson, Hardeman (Division of Water Resources served by Memphis EFO, except for septic related services), Henderson, Henry, Madison, McNairy”
  • Septic permitRequired

    Installation of a subsurface sewage disposal system on property in Tennessee, and repair of an existing faulty system.

    • A Septic System Construction Permit is required before installation or repair.
    • The application requires site and system information; soils maps may be required and large conventional or alternative systems require a licensed-engineer design.
    • The review generally takes 10 days and must be completed within 45 days.
    • New conventional permit fee is $400 up to 1,000 gallons per day, plus $100 for each additional 1,000 gallons per day.
    • New alternative permit fee is $500 up to 1,000 gallons per day, plus $150 for each additional 1,000 gallons per day.
    • Experimental SSDS permit fee is $500.
    • Repair permits have no permit fee; repair construction inspection fee is $100.
    • Contract counties Blount, Davidson, Hamilton, Jefferson, Knox, Madison, Sevier, Shelby, and Williamson may require an additional permit.

    new conventional SSDS permit fee: 400 USD up to 1000 gallons per day design flow ($100 for each additional 1000 gpd flow) · new alternative SSDS permit fee: 500 USD up to 1000 gallons per day design flow ($150 for each additional 1000 gpd flow) · experimental SSDS permit fee: 500 USD · repair permit fee: No permit fee

    “Any individual or property owner who desires to have a subsurface sewage disposal (septic) system installed on their property or requiring repair to an existing faulty system must get a Septic System Construction Permit.”
    One more reviewed finding on this topic
    • Required — Construction, modification, or repair of septic systems in Obion County.
      “A septic system permit is required for the construction, modification or repair of a septic system.”
  • Septic inspectionRequired

    Permitted septic installations in Obion County.

    • The installer must contact the local Environmental Scientist for a final inspection before the system is covered.
    • If approved, the Environmental Scientist issues a Certificate of Completion.
    “When installation is complete, the installer will contact the local Environmental Scientist to schedule a final inspection before the system is covered.”
  • Mandatory utility hookupSewer (with conditions)

    Residential, commercial, or industrial buildings on lots or parcels abutting a street or other public way containing a sanitary sewer, where the applicable Tennessee utility system has issued bonds payable for sewer services.

    • The cited Tennessee statute grants qualifying utility systems authority to require connection.
    • The building must exist on the abutting lot or parcel.
    • The owner, tenant, or occupant may be required to cease using other means for disposal of sewage, sewage waste, or other polluting matter.
    • This source describes authority to require sewer connection; it does not establish that every Tennessee property has sewer available.
    “Utility systems within the State of Tennessee that have issued bonds payable for sewer services are granted authority in TCA § 7-35-201 (1) to "require the owner tenant or occupant of each lot or parcel of land that abuts upon a street or other public way containing a sanitary sewer and upon which lot or parcel a building exists for residential, commercial or industrial use, to connect the building with the sanitary sewer and to cease to use any other means for the disposal of sewage, sewage waste or other polluting matter."”
  • Agricultural exemptionConditional

    Buildings or structures on land used for agricultural purposes and subject to county zoning regulation in Tennessee.

    • The building or structure must be located on lands devoted to agricultural uses.
    • The building or structure must be incidental to the agricultural enterprise.
    • The exemption does not apply to agricultural lands adjacent or in proximity to state or federal-aid highways, public airports, or public parks.
    • The exemption does not apply to land located within the one-hundred-year flood plain.
    • The Attorney General opinion states that the provision applies to counties only and has no application to municipalities.
    • There is no blanket exemption for cotton gins, grain elevators, slaughterhouses, processing plants, or milk bottling plants; those structures qualify only when the statutory conditions are met.
    “it must be located on lands “devoted to agricultural uses;” and (2) it must be “incidental to the agricultural enterprise.””
  • Driveway accessLimited

    Construction, modification, revision, or change in use of a driveway on Tennessee state highway right-of-way.

    • The requirement applies to state highway right-of-way and does not establish a permit requirement for every driveway on every road.
    • Property owners must obtain the permit from TDOT.
    • County or municipal land-use regulations may also apply.
    “Under state law, a permit is required before construction of a driveway on state highway right-of-way, including the modification, revision, or change in use”
  • Permit feesPublished (with conditions)

    Tennessee SSDS permits and inspections applicable in Obion County.

    • Fees vary by system type and design flow.
    • Repair permits have no permit fee but repair construction inspection has a $100 fee.

    new conventional or large diameter graveless pipe SSDS permit: 400 USD up to 1000 gallons per day design flow ($100 for each additional 1000 gpd flow) · new conventional SSDS construction inspection: 100 USD · new alternative SSDS permit: 500 USD up to 1000 gallons per day design flow ($150 for each additional 1000 gpd flow) · alternative SSDS construction inspection: 200 USD · experimental SSDS permit: 500 USD · repair permit: No permit fee · repair construction inspection: 100 USD

    “New Conventional or Large Diameter Graveless Pipe SSDS Permit | $400 up to 1000 gallons per day design flow”
    One more reviewed finding on this topic
    • Published (with conditions) — Residential building permits administered by Tennessee's State Residential Building Code Enforcement Program for one- and two-family dwellings and townhouses where the state program applies.
      “$0 to $5,000 | $100 | $100 | $100 $5,001 to $100,000 | $350 | $100 | $100”
  • Permit processPublished (with conditions)

    Residential permit purchase and inspection process under Tennessee's State Residential Building Code Enforcement Program.

    • The state program applies to one- and two-family dwellings and townhouses only in areas without the stated local-code exemption or opt-out.
    • A first-time CORE user must register for an account.
    • A building permit must be purchased online or at a local Issue Agent.
    • Inspections cover the foundation before pouring, framing/rough-in construction, and final construction.
    • One free re-inspection is available; each additional re-inspection requires an additional fee.
    • A homeowner may build a home only if it will be the homeowner's residence, not sold or leased, and the homeowner has not received a homeowner building permit during the preceding 24 months.
    • Detached garages, sheds, barns, and other detached structures not used for living purposes do not require a state residential building permit.
    • A permit is not required for installation of a manufactured or modular home, but custom site work such as a deck, patio, or stoop requires a permit.

    effective date for permit requirement for additions over 30 square feet: 2011-10-01 (Applies to additions to existing homes.) · free re-inspections per project: 1 inspection (Available if a required inspection is not passed the first time.)

    “A building permit must be purchased online or at a local Issue Agent. The cost of the building permit is based on the estimated cost”
    One more reviewed finding on this topic
    • Published (with conditions) — Tennessee SSDS permit process applicable in Obion County.
      “A detailed review of the application is conducted, and the applicant is notified when the review is complete. The review process generally takes 10 days and must be completed within 45 days of the date the application was submitted.”
  • county zoning authorityGeneral

    County legislative bodies adopting zoning regulations for portions of Tennessee counties outside municipal corporations.

    • The authority is exercised under the conditions and procedures in Tennessee Code Annotated §§ 13-7-101 through 13-7-119.
    • The grant applies to portions of counties outside municipal corporations.
    • County zoning authority does not authorize county building permits or regulation of buildings or structures on agricultural land when the building or structure is incidental to the agricultural enterprise, except on agricultural lands adjacent or in proximity to state federal-aid highways, public airports or public parks.
    • The agricultural-land limitation applies to counties only and has no application to municipalities.
    “Under Tenn. Code Ann. § 13-7-101, et seq., the General Assembly has expressly delegated the authority to county legislative bodies to enact zoning regulations and create a board of zoning appeals.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Off-grid sanitation — Off-grid sanitation systems in unincorporated Obion County.
  • Well permit — Private wells in unincorporated Obion County.
  • Subdividing land — Subdivision regulation in unincorporated Obion County.
  • Building in a floodplain — Floodplain-development requirements in unincorporated Obion County.
  • Short-term rentals — Short-term-rental regulation in unincorporated Obion County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Obion County, Tennessee

Is Obion County a good place to live off-grid or homestead?

Obion County scores 75/100 on the Bolthole Index, a strong county profile. Its strengths: manageable long-term carry cost and strong self-sufficiency basics: 52.9″/yr rainfall plus 32.6% wooded land.

Do you need a building permit in Obion County, Tennessee?

Obion County generally requires a residential building permit, and it has no county-wide zoning. Onsite septic is permitted by Tennessee Department of Environment and Conservation (TDEC), Division of Water Resources - SSDS. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Obion County, Tennessee?

Land in Obion County runs about $4,192 per acre, based on the latest county data.

What is the water situation in Obion County?

Obion County gets about 52.9" of rain a year, with severe drought in roughly 7.4% of years.

How remote is Obion County?

A representative private-land location has about 31,288 people within a 30-minute drive and 1,102,038 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Off-grid gear

Going off-grid in Obion County means bringing your own water and power. The kit we’d start with:

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How Obion compares in Tennessee

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