Bolthole Index

Marion County, Tennessee

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

71Index Score / 100
#49 of 95 in Tennessee

Unincorporated Marion County, Tennessee requires county building permits for residential and other listed construction, including mobile homes, decks, plumbing and mechanical work.1 The county has no zoning in its unincorporated area, but setbacks, septic approval, building rules and private restrictions can still shape a project.234

At a glance

Building permit
Required for residential and other listed construction in unincorporated Marion County1
Zoning
No county zoning in unincorporated Marion County; private restrictions and city rules may still apply2
Septic
A TDEC construction permit is required for a new system or repair54
Setbacks
General county setbacks are 40 feet front and 15 feet at the sides and rear3
Mobile homes
County inspection and permit required before placement, with stated lot and setback rules6
Owner-builder
Allowed for an individual-use home under Tennessee's conditions78
State-highway driveway
A TDOT permit is required before construction, modification or a change in use9

Who to call

Building permits

Marion County Building and Planning

Building permitting and planning assistance for unincorporated Marion County

423 942 8019

[email protected]

Online permits →

Septic permits

TDEC Chattanooga Environmental Field Office

TDEC environmental field-office contact for Marion County, including Division of Water Resources assistance

(423) 634-5745

1301 Riverfront Parkway | Suite #206 | Chattanooga, TN 37402

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 Marion County, Tennessee?

Yes. Unincorporated Marion County requires a county building permit for listed work that includes residential, commercial and storage construction, pole barns, mobile homes, decks, in-ground pools, roof-mounted solar panels, plumbing and mechanical work.1 Property inside a Marion County city goes through that city instead.1

Before the county application is complete, the permit procedure calls for septic approval or verification, scaled drawings, the tax-map and parcel information, and an emergency-services address.1 Marion County Building and Planning provides the online permit portal and assistance for permitting in the unincorporated county.10 The statewide residential program applies only where the State Fire Marshal administers that program, so applicants here should begin with the county office rather than assume the state fee table is their local fee schedule.1110

Who issues building permits in Marion County, Tennessee?

Marion County Building and Planning is the starting point for building permits on unincorporated land, and its official page links to the county's online permitting portal.10 The office can be reached at 423 942 8019 or [email protected].10

Bring the parcel's tax-map and parcel identifiers, its emergency-services address, septic documentation and scaled plans when preparing the application.1 For land inside an incorporated city, contact the city because city permitting applies there.1 An owner may act as builder for a Tennessee home intended for the owner's individual use, but the state limits that route to one permit every two years and excludes a residence built for sale, lease or rent.8 If the owner hires a contractor paid more than $25,000, the contractor is treated as the licensed prime and must obtain the permit for inspections.8

Does Marion County, Tennessee have zoning?

Unincorporated Marion County has no county zoning.2 That does not erase the county's building-permit system or its general setbacks: buildings are set back 40 feet from the front property line and 15 feet from each side and the rear, with measurements taken from property lines rather than the road or right-of-way.3

A deed, recorded plat, development restriction or homeowners association may impose private limits even where county zoning is absent, and incorporated cities may administer their own local rules.2 Marion County has specific placement rules for mobile homes as well: county review is required before placement, and a Tennessee-authorized installer must perform setup.6 Buyers considering a tiny home should not treat the absence of zoning as approval for a particular structure or use; ask Marion County Building and Planning how the building code, septic approval and setbacks apply to the proposed design.110

How do septic permits work in Marion County, Tennessee?

Tennessee requires a Septic System Construction Permit before installing a subsurface sewage system or repairing a faulty one, and Marion County directs applicants toward TDEC's Division of Water Resources process.54 The state application requires site and system information; a soil map may be required, while large conventional or alternative systems require a licensed engineer's design.4

The published state fee is $400 for a new conventional system with design flow up to 1,000 gallons per day, or $500 for a new alternative system at that flow.4 Repair permits have no permit fee, though the repair construction inspection fee is $100.4 Only 4.8% of county soils are rated without severe limits for a conventional drain field, so septic feasibility deserves early attention before siting a house.12 The TDEC Chattanooga Environmental Field Office serves Marion County and can route Division of Water Resources questions.13

Can you live in an RV or tiny home in Marion County, Tennessee?

We could not confirm a county rule that answers whether someone may occupy an RV on private land in unincorporated Marion County. Ask Marion County Building and Planning about temporary occupancy, utility hookups and sanitation before buying or moving an RV onto a parcel.10 Tennessee's septic-permit requirement still applies when a subsurface sewage system is installed or a faulty system is repaired.4

A tiny home intended as a residence should not be assumed exempt merely because unincorporated Marion County has no zoning.2 Residential construction is among the work for which the county issues building permits, and the county's general building setbacks still apply.13 A mobile home follows a more specific path: county inspection and a mobile-home permit are required before installation, setup must be by a Tennessee-authorized installer, and the home must occupy an individual lot.6

What are the steps to build a home in Marion County, Tennessee?

For a home on unincorporated Marion County land, use this order:

  1. Confirm that the parcel lies outside an incorporated city, because property in a city uses that city's permitting process.1
  2. Review the deed and plat for private restrictions, then lay out the house using the county's 40-foot front and 15-foot side and rear setbacks.23
  3. Resolve wastewater service early; a new or repaired septic system needs a TDEC construction permit, while some qualifying utilities may require sewer connection where service abuts an existing developed parcel.414
  4. Obtain an emergency-services address and prepare the scaled plans, parcel identifiers and septic verification required for the county application.1
  5. Apply through Marion County Building and Planning's portal and coordinate the required inspections with that office.10
  6. If the driveway enters a state-highway right-of-way, obtain TDOT approval before construction or changing its use.9

What should you check before buying land in Marion County, Tennessee?

Start with buildability, not the asking price. Only 40.7% of Marion County land is at a slope of 15% or less, and just 4.8% of its soils are rated without severe limitations for a conventional septic drain field.1512 Those countywide figures do not decide an individual parcel, but they make a site-specific soil evaluation, driveway layout and house pad review especially valuable before closing.

Confirm legal access and identify whether the road is county-maintained or a state highway; a driveway on state-highway right-of-way requires a TDOT permit before construction, modification or change in use.9 We could not confirm a general Marion County driveway-permit rule for county roads, so ask the county office before finalizing access.10 Verify water availability directly with the serving utility or a qualified well professional because a countywide well-permit answer could not be confirmed. The county's effective property-tax rate is about 0.4%, with a median annual bill of $771.1617

Watch-outs

  • No county zoning does not mean no constraints: unincorporated parcels remain subject to building permits, setbacks, septic rules and possible private restrictions.2134
  • Mobile homes need county inspection and a permit before placement, plus setup by a Tennessee-authorized installer.6
  • RV occupancy, off-grid sanitation and private-well permitting could not be confirmed; ask Marion County Building and Planning and TDEC before relying on those uses.1013

Sources

  1. Services — Marion County, quoted and re-checked
  2. Frequently Asked Questions, quoted and re-checked
  3. Marion County Planning and Building Office Procedures and Requirements, quoted and re-checked
  4. Septic System Construction Permit (Tennessee statewide rule), quoted and re-checked
  5. TDEC - Subsurface Sewage Disposal Systems (SSDS) (2026 county census)
  6. Required Building Inspections, quoted and re-checked
  7. Marion County Building & Planning (2026 county census)
  8. Can I build my own home without a license? (Tennessee statewide rule), quoted and re-checked
  9. Highway Entrance Permits (Tennessee statewide rule), quoted and re-checked
  10. Marion County Building and Planning (marioncountytn.net)
  11. Residential Permit FAQs (Tennessee statewide rule), 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 Chattanooga Environmental Field Office (tn.gov)
  14. Utility Customers Frequently Asked Questions (Tennessee statewide rule), quoted and re-checked
  15. Share of land at 15% slope or less: Bolthole Index county data
  16. Effective property tax rate: Bolthole Index county data
  17. Median property tax bill: Bolthole Index county data

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.

Found land here? Start a Property Hunt →

County locator

Marion County in Tennessee

71
County map
Marion County highlighted among the Tennessee counties · colored by Index score

How Marion County scores

Seclusion48100% ev.
Self-Sufficiency63100% ev.
Admin Boringness63100% ev.
Durability54100% ev.
Property Autonomy71100% ev.
Carry Cost81100% 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 →

$267kTypical home
0.4%Property tax
$5,249Land / acre
61.5"Annual rain
7.1% of yrsSevere drought
4.4 / yr (+4.2)Mid-century 100°F days
13.8 daysMid-century dry spell
2.66" (+10.3%)Mid-century 1-day rain
1.5×Wildfire change factor
100%Forward climate coverage
$1,823Home insurance / yr
0.7% / yrInsurance growth
0.94%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
17,225People within 30 min
4,238,284People within 2 hr
50,238Radius comparison (15 mi)
59People / sq mi
0.4%Federal land
40.7%Land at 15% slope or less
4.8%Septic soil without severe limits
12,883 acWorkable land screen
82.4%Wooded land
55.3 tonsBiomass / forest ac
58.5°FAvg temp

Scout Marion County

Camp here before you commitBook a few nights nearby on Hipcamp →Already own land here?Earn money hosting campers — get $100 when you become a Hipcamp host →

Some links are affiliate or referral links — we may earn a commission, at no cost to you.

Property hunt

Find land. Bring the promising ones back.

Search live inventory elsewhere, then cost and vet each candidate here. No copied listings, account, or paid data feed.

View your full hunt →
ZillowLand & lotsRealtor.comLand listingsLandSearchRural & vacant land

Each button opens a current land search for Marion County. Listing sites control their own results and filters.

Analyze a property
Add setup-cost allowances

Use rough quotes or placeholders. Blank fields count as $0.

Working estimate

—land + entered setup costs
Asking $ / acre
—
Setup allowance
—
All-in $ / acre
—

A planning estimate, not a valuation or contractor quote. The USDA benchmark includes farm land and buildings; it is context, not a parcel comp.

Before an offer

Parcel due diligence

0/8 checked

Saved properties and checklist progress stay on this device. Bolthole Index does not receive them.

Answers from the rulebook for Marion County

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

Marion County rules

  • Building permitRequired

    Construction requiring a Marion County building permit in unincorporated Marion County.

    • The county building office issues permits for listed construction categories including commercial, residential, storage, pole barns, mechanical, plumbing, decks, in-ground pools, cell towers, roof-mounted solar panels, and mobile homes.
    • The procedures document requires a septic application or verification, two sets of scaled drawings, tax map and parcel numbers, and a 9-1-1 address before the application is completed.
    • Permitting for property in county cities is through the city.
    “The Building Office issues building permits”
  • County-wide zoningAbsent

    County zoning in unincorporated Marion County, Tennessee.

    • The county FAQ states that some plats or developments may have private covenants, restrictions, provisions, or homeowners associations.
    • Incorporated cities in Marion County may administer their own local rules.
    “There is no zoning in unincorporated Marion County, Tennessee”
  • SetbacksSpecified

    General building setbacks stated by the Marion County Building and Planning Office for unincorporated property.

    • Setbacks are measured from property lines, not the road or right-of-way.

    front setback: 40 feet · side setback: 15 feet · rear setback: 15 feet

    “Front – 40 Feet; Side – 15 Feet; Rear – 15 Feet”
  • Manufactured homesLimited

    Manufactured/mobile-home placement and occupancy in unincorporated Marion County.

    • All mobile homes must be placed on an individual lot.
    • Minimum lot size is 15,000 square feet with public water and 25,000 square feet with well water.
    • Mobile-home setbacks are 40 feet front, 15 feet side, and 25 feet rear.
    • A licensed installer authorized by Tennessee must set up the mobile home.
    • A county pre-placement inspection and mobile-home permit are required before installation.

    minimum lot size with public water: 15000 square feet · minimum lot size with well water: 25000 square feet · front setback: 40 feet · side setback: 15 feet · rear setback: 25 feet

    “all Mobile Homes must be placed on an individual lot.”
  • Who permits septicTennessee Department of Environment and Conservation (TDEC) - Division of Water Resources

    County directs applicants to TDEC/Division of Water Resources approved soil consultants; subsurface sewage (septic) permits are issued statewide by TDEC.

    TDEC - Subsurface Sewage Disposal Systems (SSDS) ↗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”
  • 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.”
  • 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)

    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.

    • The state program does not apply where a local government enforces local building codes under an exemption or where the city or county has opted out by a two-thirds vote.
    • For construction costs above the maximum listed in the table, an additional fee of $50.00 applies for each additional $50,000 or fraction thereof.
    • The construction cost cannot be less than $60.57 per heated square foot of construction.
    • An HVAC and Plumbing Inspection is required for all new construction.
    • A slab other than Monolith Pour Inspection is required when slab and footing are cast separately.

    permit fee for construction cost $0 to $5,000: 100 USD · permit fee for construction cost $5,001 to $100,000: 350 USD · additional fee for plumbing and HVAC inspection: 100 USD (Applicable as stated in the fee table.) · additional fee for slab other than monolith pour: 100 USD (Applicable when slab and footing are cast separately.)

    “$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”
  • 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.

  • Septic inspection — Septic-system inspection requirements in Marion County.
  • Off-grid sanitation — Off-grid sanitation systems in Marion County.
  • Well permit — Private well permitting in Marion County.
  • Short-term rentals — Short-term-rental regulation in Marion 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 Marion County, Tennessee

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

Marion County scores 71/100 on the Bolthole Index, a strong county profile. Its strengths: manageable long-term carry cost and a stronger property-autonomy legal backdrop.

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

Marion 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. 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 Marion County, Tennessee?

Land in Marion County runs about $5,249 per acre, based on the latest county data.

What is the water situation in Marion County?

Marion County gets about 61.5" of rain a year, with severe drought in roughly 7.1% of years.

How remote is Marion County?

A representative private-land location has about 17,225 people within a 30-minute drive and 4,238,284 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 Marion County means bringing your own water and power. The kit we’d start with:

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

How Marion compares in Tennessee

Compare side-by-side →See all 95 Tennessee counties ranked →