Unicoi County, TN: Limited Building Permits

Unincorporated Unicoi County, Tennessee is listed as an opt-out jurisdiction under the state residential building program, so a state residential permit is available for an optional inspection rather than imposed through the standard statewide program¹². Whether the county requires its own building permit, and whether it zones unincorporated land, could not be confirmed; ask Unicoi County Planning and Development before designing for a parcel³⁴⁵. Inside Erwin and the Town of Unicoi, each town sets its own zoning⁶⁷, while septic construction permits for every address come from TDEC's Division of Water Resources⁸.

At a glance

Building permit: State program is opt-out; confirm any local requirement with county Planning and Development⁹³⁵
Optional state inspection: Available through a state residential permit in an opt-out jurisdiction²⁹
Zoning: Unconfirmed for unincorporated Unicoi County; ask Planning and Development⁴⁵
Septic permit: Required through TDEC before installing or repairing a septic system⁸¹⁰
Owner-builder: Conditional state exemption for a personal residence that will not be sold, leased or rented¹¹
RV and tiny-home living: Unconfirmed; ask Planning and Development before relying on either use⁴⁵
Septic soil difficulty: Only 1.6% of soils rate without severe limits for a conventional drain field¹²

Who to call

Planning & zoning

Unicoi County Planning and Development

County contact for parcel-specific planning, zoning and local building-permit questions

423-743-9391

100 North Main Ave. #102 | Erwin, TN 37650

Building permits

Tennessee State Fire Marshal's Office assigned residential inspector for Unicoi County

State residential permit inspections requested for Unicoi County as an opt-out jurisdiction

423-672-8967

aplusinspktr@gmail.com

Online permits →

Septic permits

Johnson City Environmental Field Office (TDEC Division of Water Resources)

Septic permit help, site evaluations, inspections and existing septic layout requests for Unicoi County

(423) 854-5400

TDEC.Johnsoncity.EFO@tn.gov

2305 Silverdale Drive, Johnson City, TN 37601-2162

Online permits →

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 Unicoi County means bringing your own water and power. The kit we’d start with:

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

Unicoi County appears as "OPT OUT" on the State Fire Marshal's official residential-inspector list⁹. Tennessee's statewide residential permit requirement applies only where the state program operates; local governments may enforce their own codes, and counties may remove unincorporated areas from the state program¹³. That means the standard mandatory state permit cannot by itself answer whether Unicoi County requires a local permit³. Unicoi County does not publish enough detail on its Planning and Development page to confirm the local requirement, applicable code, fees or inspection sequence, so ask that department about the exact parcel and project⁵³. Owners who want a state inspection may obtain a state building permit in an opt-out jurisdiction, and the State Fire Marshal may release a Certificate of Occupancy when the dwelling meets statewide safety standards².

Who handles building and planning questions in Unicoi County?

Start with Unicoi County Planning and Development for the local answer on an unincorporated parcel; the county publishes the department page with its courthouse contact information⁵. Ask whether the proposed house, addition, manufactured home or accessory structure needs a local approval, which code authority applies and which inspections are required³. For an optional state inspection, Tennessee's official jurisdiction list provides an assigned residential inspector for opt-out Unicoi County⁹. A state inspection is a separate path: an owner or contractor may obtain a state building permit to request inspection of a new or expanded dwelling in an opt-out jurisdiction². Tennessee's state residential permit does not replace septic approval, floodplain compliance, grading approval, electrical permits or any locally adopted requirement¹³.

Does Unicoi County have zoning?

County zoning for unincorporated Unicoi County could not be confirmed from the county's published material⁴. Tennessee law authorizes county legislative bodies to zone areas outside municipalities, but that statewide authority does not prove that Unicoi County adopted a zoning resolution or establish a parcel's district¹⁴. Ask Unicoi County Planning and Development to confirm the parcel's jurisdiction, allowed use, setbacks, minimum lot size, minimum dwelling size, building height and any floodplain review before relying on a site plan⁵⁴. Inside the Town of Erwin, land use is governed by the town's zoning ordinance, and inside the Town of Unicoi by that town's own zoning ordinance, so a county answer does not govern land inside either town⁶⁷. Both towns are also listed as exempt from the state residential building program¹⁵¹⁶. For unincorporated land, the Unicoi County subdivision regulations require Planning Commission approval of a plat before it is recorded; they cover dividing a tract into two or more lots, or dividing less than 5 acres for sale or building¹⁷. If county zoning applies, Tennessee's agricultural exception is conditional: a structure must be on land devoted to agricultural use and incidental to the agricultural enterprise, with exceptions near specified public facilities and in the floodplain¹⁸.

How do septic permits work in Unicoi County?

A Septic System Construction Permit is required before installing a new septic system or repairing a faulty one in Unicoi County¹⁰. TDEC's Johnson City Environmental Field Office serves Unicoi County and is the practical contact for permit help, records and the local site-evaluation process¹⁹²⁰. A new conventional permit costs $400 for design flow up to 1,000 gallons per day, while a new alternative permit costs $500 at the same design flow; higher flows add fees¹⁰. Only 1.6% of county soils rate without severe limits for a conventional drain field, so make septic feasibility an early purchase contingency rather than assuming a standard layout will work¹². Keep the installed system uncovered until the Environmental Scientist conducts the final inspection; approval leads to a Certificate of Completion²¹. Electrical service also depends on written notice showing public sewer service, a septic application or use of an existing septic system²².

Can you live in an RV or tiny home on your land in Unicoi County?

Long-term RV occupancy, temporary camping and tiny-home occupancy on private land in unincorporated Unicoi County could not be confirmed⁴. The county's subdivision regulations do allow tiny-home communities developed as planned unit developments with more than one housing unit, but only with Planning Commission approval of a site plan²³. That does not answer the question for a single tiny home on an ordinary parcel. The same gap applies to manufactured homes, accessory dwellings, minimum home size and residential setbacks⁴. Ask Unicoi County Planning and Development for a written parcel-specific answer before buying an RV or small dwelling for residential use⁵. The county's opt-out status under the state residential program does not settle land use, sanitation, utility connections or floodplain requirements⁹¹³. Any occupied project still needs a workable sanitation plan because new or repaired septic systems require state approval, and the electrical-service process requires written notice of sewer or septic status¹⁰²². A tiny structure intended as a home should therefore be checked with Planning and Development and TDEC before purchase or placement⁵²⁰.

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

Confirm whether the parcel is in unincorporated Unicoi County, Erwin or the Town of Unicoi, because each town has its own zoning ordinance⁶⁷.
Ask Unicoi County Planning and Development to confirm local permits, zoning, setbacks, floodplain review and the inspection sequence for the parcel⁵⁴.
Have TDEC evaluate septic feasibility and obtain the required construction permit before installing or repairing a system²⁰¹⁰.
Decide whether to request an optional state inspection and Certificate of Occupancy through the state permit path available in opt-out jurisdictions⁹².
If acting as owner-builder, keep the home for individual use and do not offer it for sale, lease or rent under the conditional Tennessee exemption¹¹.
Obtain a TDOT entrance permit before building or changing a driveway on state highway right-of-way²⁴.
Leave the septic system uncovered for TDEC's final inspection and retain the Certificate of Completion²¹.

What should you check before buying land in Unicoi County?

Septic and slope are the first physical screens: only 1.6% of soils rate without severe conventional-drain-field limits, and only 13% of the county is at a slope of 15% or less¹²²⁵. The county is 93.8% wooded, so verify the buildable pad, access and clearing needs on the actual tract²⁶. Annual precipitation averages 51.1 inches, but water-well permitting and expected well yield could not be confirmed; ask Planning and Development who handles a private-water proposal²⁷⁵. A driveway on state highway right-of-way needs TDOT approval before construction or a change in use²⁴. The effective property-tax rate is about 0.6%, and the median annual property-tax bill is about $960²⁸²⁹. Before closing, make the contract contingent on written land-use confirmation and septic feasibility because both can change the practical buildable area⁴¹⁰.

Watch-outs

Unicoi County's opt-out listing answers the state-program question but does not confirm whether a separate local building approval applies; ask Planning and Development before starting work⁹³⁵.
County zoning, RV occupancy, tiny-home occupancy, minimum dwelling size and setbacks remain unconfirmed for unincorporated land; obtain a parcel-specific answer from Planning and Development⁴⁵.
Only 1.6% of county soils rate without severe limits for a conventional drain field, so do not treat an undeveloped lot as septic-ready without TDEC review¹²²⁰.

Sources

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.

Compared with neighboring counties

Unlike 5 of its 6 neighbors, Unicoi County requires a building permit only in limited cases.

Rule	Unicoi County	Washington County	Carter County	Greene County	Sullivan County	Hawkins County	Cocke County
Building permit	Limited	Required	Required	Required	Required	Required	Limited
County zoning	Not published	Yes	Yes	Yes	Yes	No	Yes
Septic permits	TDEC	TDEC	TDEC	TDEC	TDEC	TDEC	TDEC

How Unicoi County scores

Seclusion31100% ev.

Self-Sufficiency56100% ev.

Admin Boringness6577% ev.

Durability86100% ev.

Property Autonomy71100% ev.

Carry Cost68100% ev.

Evidence strength: 96%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$251kTypical home

0.6%Property tax

$10,994Land / acre

51.1"Annual rain

0.7% of yrsSevere drought

0.3 / yr (+0.3)Mid-century 100°F days

10.8 daysMid-century dry spell

1.74" (+8.5%)Mid-century 1-day rain

1.67×Wildfire change factor

100%Forward climate coverage

$1,335Home insurance / yr

-0.5% / yrInsurance growth

1.28%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

143,827People within 30 min

3,007,364People within 2 hr

86,814Radius comparison (15 mi)

95.4People / sq mi

10.6%Federal land

13%Land at 15% slope or less

1.6%Soils rated "not limited" for septic (strict USDA rating)

1,766 acWorkable land screen

93.8%Wooded land

82.3 tonsBiomass / forest ac

53.8°FAvg temp

Answers from the rulebook for Unicoi County

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

Unicoi County rules

Building code adoptedNot adopted (with conditions)
Statewide building construction standards for one- and two-family dwellings within Unicoi County.
- The state source identifies Unicoi County as OPT OUT, meaning the jurisdiction passed a resolution opting out of the State Residential Building Program.
- This claim does not establish whether separate local building requirements apply.
“Unicoi County | OPT OUT | Shawn Jackson | aplusinspktr@gmail.com | 423-672-8967”
Residential Permits Residential Jurisdictions & Inspectors ↗Re-checked Oct 4, 2026
InspectionsLimited
One- and two-family dwellings and additions in unincorporated Unicoi County.
- Because Unicoi County is an opt-out jurisdiction, an owner or contractor may obtain a state building permit and request State Fire Marshal inspection.
- The state inspection is available during construction for new construction and additions.
“inspected by an inspector with the State Fire Marshal’s Office during the construction process”
Residential Permits: Residential Jurisdictions & Inspectors ↗Re-checked Oct 3, 2026
Certificate of occupancyLimited
One- and two-family dwellings in opt-out unincorporated Unicoi County using the State Fire Marshal inspection option.
- The State Fire Marshal releases a Certificate of Occupancy if the dwelling is determined to meet statewide building construction safety standards.
- The state CO option depends on obtaining a state building permit and requesting inspection.
“the State Fire Marshal’s Office will release a Certificate of Occupancy”
Statewide Building Construction Code Inspections in Opt-Out or Non-Code Jurisdictions ↗Re-checked Oct 3, 2026
Minimum lot sizeSpecified
Lot sizing in subdivisions within the Unicoi County Planning Region, particularly where public water, public sewer, wells, or septic systems affect development feasibility.
- The size, shape, and orientation of lots must be appropriate as determined by TDEC for the contemplated development and use.
- Where public water and sanitary sewer are reasonably accessible, the developer must connect to those systems and provide connections to each lot.
- Where public sewer is unavailable, an alternative sewage-disposal method may be used only if it meets applicable public-health regulations.
- Existing nonconforming lots may be combined with property served by a public utility or a TDEC-approved septic system.
- Where public water is unavailable, a well or other water source requires Planning Commission approval and remains subject to applicable lot-size requirements.
“The size, shape, and orientation of lots shall be such as TDEC deems appropriate for the type of development and use contemplated.”
Unicoi County Subdivision Regulations ↗Re-checked Oct 7, 2026
2 more reviewed findings on this topic
- Specified — Lot dimensions and lot-size determinations for subdivisions within the Unicoi County Planning Region.
  “lots shall be such as TDEC deems appropriate”
  Unicoi County Subdivision Regulations ↗Re-checked Oct 7, 2026
- District specific (with conditions) — Subdivision lots within the Unicoi County Planning Region governed by the Unicoi County Regional Planning Commission's subdivision regulations.
  “The size, shape, and orientation of lots shall be such as TDEC deems appropriate for the type of development and use contemplated.”
  Unicoi County Subdivision Regulations ↗Re-checked Oct 7, 2026
Tiny homesAllowed (with conditions)
Tiny-home communities developed as Planned Unit Developments within the Unicoi County Planning Region.
- The development must qualify as a Planned Unit Development containing more than one housing unit.
- A homeowners association or other written governance and maintenance regulations are intended for the PUD.
- A site plan must be submitted to the Planning Commission for review no later than 10 days before the next meeting.
- The site plan must include the listed streets, buildings, utilities, drainage, erosion, and topography information.
- All streets, roads, rights-of-way, private streets, driveways, and utilities must comply with Articles III and IV.
- A guarantee in lieu of completed improvements may be required before final approval.
- Minor changes or variances may be approved only if consistent with surrounding properties and the ordinance's intent.
- FEMA flood guidelines apply in flood zones, and a development permit is required if land is disturbed in a flood zone.
site-plan submission deadline: <= 10 days before next Planning Commission meeting
“tiny home communities [...] The following must be met and approved by the Planning Commission:”
Unicoi County Subdivision Regulations ↗Re-checked Oct 7, 2026
Subdividing landRegulated (with conditions)
Subdivision of land within the Unicoi County Planning Region and areas within the regional jurisdiction of the Unicoi County Regional Planning Commission.
- The regulations do not establish a countywide scope beyond the Unicoi County Planning Region and the Planning Commission's regional jurisdiction.
- Subdivision includes dividing a tract or parcel into two or more lots, sites, or other divisions requiring new street or utility construction, or dividing less than five acres for immediate or future sale or building development.
- An owner wishing to subdivide must submit a subdivision plan to the Planning Commission and obtain approval before filing the subdivision plat for record.
- The plat must conform to the minimum design standards in Article III and required improvements in Article IV.
- No subdivision plat within the Unicoi County Planning Region may be filed or recorded by the County Registrar of Deeds without Planning Commission approval.
- The regulations state adoption and effective date as April 8, 2019; the document is marked updated June 13, 2022.
lot-area threshold: < 5 acres (The definition covers divisions of less than five acres for sale or building development; divisions requiring new street or utility construction are also included.)
“The subdivision regulations shall govern all subdivision of land within the boundary of the Unicoi County Planning Region. These regulations will apply to areas within the planning regional jurisdiction of the Unicoi County Regional Planning Commission.”
Unicoi County Subdivision Regulations ↗Re-checked Oct 6, 2026

Tennessee rules that apply here

Building permitLimited
State residential building permits for one- and two-family dwellings and townhouses in Tennessee jurisdictions where the State Fire Marshal's Office administers the residential building permit program.
- The state permit is required only in some areas because other jurisdictions may enforce local residential building codes.
- A county legislative body may remove unincorporated areas from the state program or a city legislative body may remove the city by a two-thirds vote.
- The state permit does not replace grading or fill approval, floodplain compliance, septic or sewer permits, electrical permits, or zoning approval.
- Local governments remain responsible for locally adopted codes and other requirements.
“Why is the state residential building permit only required in some areas of the state?”
Residential Permit FAQs ↗Re-checked Sep 12, 2026
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).”
Can I build my own home without a license? ↗Re-checked Sep 12, 2026
One more reviewed finding on this topic
- Available (with conditions) — A homeowner building a home for the homeowner's own residence under the Tennessee residential permit program.
  “an owner of property may construct a single residence once every two years for his/her own use”
  Residential Permits ↗Re-checked Oct 3, 2026
Camping on your landLimited
Overnight camping on Tennessee Wildlife Resources Agency-controlled Wildlife Management Areas and related lands where overnight camping is allowed.
- Overnight camping may be permitted only in designated areas and by permission from the area manager, park ranger, lake manager, park superintendent, or national forest supervisor.
- Camping is subject to limitations prescribed in the permit if required.
- Camping may not exceed three weeks from the beginning to the end of the camping stay.
- Owner contact information or a TWRA ID number and date of arrival must be displayed on a camper, tent, vehicle, or similar item at all times.
- Where overnight camping is allowed, firearms and archery equipment must remain in camp except during legal hunting hours.
maximum camping stay: <= 3 weeks
“May be permitted in designated areas by permission from the area manager, park ranger, lake manager, park superintendent, or national forest supervisor. Such camping is subject to the limitations prescribed in the permit if required.”
Wildlife Management Areas in Tennessee ↗Re-checked Oct 1, 2026
One more reviewed finding on this topic
- Limited — Camping and use of trailers or other camper units in Tennessee state forests administered by the Tennessee Department of Agriculture, Division of Forestry.
  “Camping and the use of trailers or other camper units are allowed only at designated locations. The district forester will issue written permits to persons to camp in backcountry or other isolated sections of a forest area.”
  Forestry Rules and Regulations ↗Re-checked Oct 1, 2026
Who permits septicMixed (with conditions)
Tennessee subsurface sewage disposal system construction permitting and related SSDS administration statewide.
- The Tennessee Division of Water Resources administers SSDS permitting in non-contract counties.
- Permit packages and Certificate of Completion packages for sites in contract counties are submitted directly to the contract county.
- The listed contract counties are Blount, Davidson, Hamilton, Jefferson, Knox, Madison, Sevier, Shelby, and Williamson.
- Installer permits are valid statewide, but contract counties may require an additional permit.
“Permit packages and Certificate of Completion Packages for sites located in the contract counties listed below should be submitted directly to the contract county.”
Septic System Construction Permit ↗Re-checked Oct 5, 2026
2 more reviewed findings on this topic
- State — Subsurface sewage disposal systems serving property in Unicoi County, a non-contract Tennessee county.
  “NOTE: Some counties provide ground water protection services for their own areas. The online application form is not to be submitted for services requested in the following metropolitan or contact counties: Blount County, Davidson County/Nashville, Hamilton County, Jefferson County, Knox County, Madison County, Sevier County, Shelby County, Williamson County”
  Septic System Construction Permit ↗Re-checked Oct 4, 2026
- Mixed (with conditions) — Statewide subsurface sewage disposal system permitting and assistance, with specified contract counties providing ground water protection services in their own areas.
  “NOTE: Some counties provide ground water protection services for their own areas. The online application form is not to be submitted for services requested in the following metropolitan or contact counties: Blount County, Davidson County/Nashville, Hamilton County, Jefferson County, Knox County, Madison County, Sevier County, Shelby County, Williamson County.”
  Online Application for Septic Related Services ↗Re-checked Oct 5, 2026
Septic permitRequired
Construction, installation, modification, or repair of residential, commercial, or industrial septic systems in Tennessee.
- A permit is required before construction, modification, or repair.
- A septic system permit should be obtained before starting dirt work or construction of any building, including the building pad.
- Repair permits have no permit fee.
- Alternative systems require an extra-high intensity soils map prepared by a Tennessee-licensed soils consultant.
- Contract counties 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: 0 USD (Repair construction inspection fee is $100)
“A septic system permit is required for the construction, modification or repair of a septic system. This permit ensures that the septic system design complies with state regulations and safeguards your health by properly managing wastewater.”
Septic System Construction Permit ↗Re-checked Oct 5, 2026
2 more reviewed findings on this topic
- Required — Installation of a subsurface sewage disposal system or repair of an existing faulty system in Unicoi County.
  “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.”
  Septic System Construction Permit ↗Re-checked Oct 4, 2026
- Required — Construction, modification, repair, or installation of a subsurface sewage disposal system in Unicoi County under Tennessee's statewide SSDS program.
  “A septic system permit is required for the construction, modification or repair of a septic system.”
  Septic System Construction Permit ↗Re-checked Oct 6, 2026
Septic inspectionRequired
Installation of subsurface sewage disposal systems in Tennessee.
- The installer must notify the Division when installation is complete.
- A final inspection is scheduled before the system is covered.
- TDEC inspects each SSDS installation for compliance with permit conditions and regulatory requirements.
- Inspection fees vary by system type: $100 for new conventional or large-diameter graveless pipe systems, $200 for alternative systems, and $100 for repair construction inspections.
new conventional construction inspection fee: 100 USD · alternative construction inspection fee: 200 USD · repair construction inspection fee: 100 USD
“The applicant or SSDS installer must notify the Division when a system has been installed so that it can be inspected and approved.”
Subsurface Sewage Disposal System (SSDS) Frequently Asked Questions ↗Re-checked Oct 5, 2026
One more reviewed finding on this topic
- Required — Permitted septic installations in Unicoi County.
  “The Division inspects each SSDS installation to ensure that it was installed in accordance with permit conditions and regulatory requirements.”
  Septic System Construction Permit ↗Re-checked Oct 4, 2026
Mandatory utility hookupConditional
Connection of buildings to sanitary sewer systems where a qualifying Tennessee utility system has issued bonds payable for sewer services and the property abuts a street or public way containing a sanitary sewer.
- The property must abut a street or other public way containing a sanitary sewer.
- A building must exist on the lot or parcel for residential, commercial, or industrial use.
- The utility system may require connection and cessation of other sewage-disposal methods.
- For electrical service, written notification must show public sewer service, a septic permit application, or an existing septic system.
“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."”
comptroller.tn.gov ↗Re-checked Oct 5, 2026
2 more reviewed findings on this topic
- Conditional — Electric service requests for a new residence using an existing septic system or proposed septic service in Unicoi County.
  “On July 1, 1994, T.C.A. 68-221-414 became effective. This bill requires that before the electrical inspector can process a request for electrical service, he/she must be provided with written notification that the proposed house or establishment is served by a public sewer system, or, that a septic system permit has been applied for, or, that an existing septic system will be used.”
  Online Application for Septic Related Services ↗Re-checked Oct 4, 2026
- Sewer (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.
  “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."”
  Utility Customers Frequently Asked Questions ↗Re-checked Sep 12, 2026
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.””
Exemption from County Zoning Regulation for Buildings on Land Used for Agriculture, Opinion No. 22-07 ↗Re-checked Sep 12, 2026
Driveway accessRequired
Residential driveways and field entrances connecting to Tennessee state highways in Unicoi County.
- The applicant must contact the local TDOT District Office.
- All entrances onto state highways must meet the manual's conditions for approval.
- Cities, counties, or other local authorities may impose their own driveway and intersection regulations.
- If more than one jurisdiction applies, the applicant must contact each authority and obtain approval from all jurisdictions.
- The more restrictive regulations apply.
- The cited manual distinguishes residential, field, multi-family, commercial, street-type, and joint-access driveways.
street-type entrance threshold: >= 250 trips per day (A traffic impact study may also be required at TDOT's discretion) · joint access driveway: written agreement of all involved property owners (Required for a permit to be issued)
“No person may construct a driveway or related encroachment on state highway right-of-way [...] without first obtaining a state highway entrance permit.”
Tennessee Department of Transportation Driveway Rules Manual ↗Re-checked Oct 3, 2026
One more reviewed finding on this topic
- Limited — Construction, modification, revision, or change in use of a driveway on Tennessee state highway right-of-way.
  “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”
  Highway Entrance Permits ↗Re-checked Sep 12, 2026
Building in a floodplainLimited
Development in or near mapped floodplains throughout Tennessee, insofar as Tennessee's statewide floodplain-management guidance describes locally administered requirements.
- Floodplain development requirements are managed locally by the community where the property is located.
- Each NFIP-participating community has a local floodplain administrator who helps manage development in mapped flood hazard areas.
- If the property is inside city limits, contact the city floodplain administrator; if outside city limits, contact the county floodplain administrator.
- Local review may be required before development begins in a regulated floodplain.
- Requirements vary by community and are based on the local floodplain management ordinance and flood zones mapped in that community.
- Development activity that may require local review includes construction, repairs, substantial improvements, placement of fill, grading, excavation, manufactured homes, accessory structures, or other development activity.
- Floodplain management ordinances are adopted, administered, and enforced by the local community, not by TEMA.
local review before development in a regulated floodplain: may be required (Requirements vary by community and mapped flood zone.)
“Floodplain development requirements are managed locally. Each community that participates in the National Flood Insurance Program has a local floodplain administrator who helps manage development in mapped flood hazard areas. [...] If the property is inside city limits, contact the city floodplain administrator. If the property is outside city limits, contact the county floodplain administrator. [...] Local review may be required before development begins in a regulated floodplain. Requirements vary by community and are based on the local floodplain management ordinance and flood zones mapped in that community.”
Statewide Floodplain Administrator Directory ↗Re-checked Oct 5, 2026
Short-term rentalsLimited
Transient rental homes in Unicoi County, subject to Tennessee building and fire-code classification rules.
- A transient rental home is occupied for 30 days or less.
- A TRH with three or fewer stories, less than 5,000 gross square feet, and 12 or fewer occupants is classified as a one- or two-family dwelling under the cited state regulations.
- A TRH with four or more stories, 5,000 gross square feet or more, or 13 or more occupants is classified as an R-3 occupancy and subject to the International Building Code and cited Tennessee regulations.
- In cities and counties with an exemption, qualifying buildings may be regulated by local building and fire-code officials; outside those areas, they are regulated by the State Fire Marshal's Office.
- This claim addresses state building/fire-code treatment, not whether a local zoning ordinance permits short-term rentals.
maximum occupancy for one- and two-family classification: <= 12 occupants (Must also be less than 5,000 gross square feet and three or fewer stories) · R-3 classification threshold: >= 13 occupants (Also applies at four or more stories or 5,000 gross square feet or more) · short-term occupancy period: <= 30 days or less
“twelve (12) or fewer occupants are classified as one- and two- family dwellings”
Transient Rental Homes ↗Re-checked Oct 3, 2026
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”
Residential Building Permit Fees ↗Re-checked Sep 12, 2026
One more reviewed finding on this topic
- Variable (with conditions) — Tennessee residential building permits where the state residential permit program applies or is used voluntarily in an opt-out jurisdiction.
  “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 of construction. A permit is not required for the installation of a manufactured or modular home; however a permit is needed if there will be custom site work that is a part of exiting the home such as a deck, patio or stoop.”
  Residential Permits ↗Re-checked Oct 3, 2026
Permit processPublished (with conditions)
TDEC's published process for obtaining SSDS permits and related services, including applications in Unicoi County.
- Applications may be submitted through the online portal; paper applications are accepted at the appropriate Environmental Field Office.
- The application requests landowner and site information, lot size, occupants, bedrooms, water use, basement information, staking status, installer information, a property/site sketch, and, when required, soils maps and system designs.
- Completed applications and fees are sent to the Division of Water Resources at the appropriate Environmental Field Office.
- The review generally takes 10 days and must be completed within 45 days of submission.
- Fees vary by permit type: new conventional or large-diameter graveless pipe permit $400 up to 1,000 gallons per day plus $100 per additional 1,000 gpd; conventional construction inspection $100; alternative permit $500 up to 1,000 gpd plus $150 per additional 1,000 gpd; alternative inspection $200; experimental permit $500; repair permit has no permit fee; repair inspection $100.
- The applicant or installer must notify TDEC when installation is complete so it can be inspected and approved.
- TDEC may revoke, suspend, or deny permits for violations, and violations may result in civil penalties.
ordinary review period: 10 days (The page states the review generally takes 10 days.) · maximum review period: <= 45 days (The page states the review must be completed within 45 days of submission.) · 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.) · repair permit fee: 0 USD (No permit fee.)
“Completed application forms and application fees should be sent to the Division of Water Resources at the appropriate Environmental Field Office. 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.”
Septic System Construction Permit ↗Re-checked Oct 6, 2026
2 more reviewed findings on this topic
- Published (with conditions) — State residential building permits and inspections in Tennessee, including the state permit option for opt-out jurisdictions.
  “purchase Electrical and/or Residential permits, add inspection services, request inspections”
  Residential Permits ↗Re-checked Oct 3, 2026
- Published (with conditions) — Residential permit purchase and inspection process under Tennessee's State Residential Building Code Enforcement Program.
  “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”
  Residential Permits ↗Re-checked Sep 12, 2026
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.”
Tennessee Attorney General Opinion No. 10-108 ↗Re-checked Sep 21, 2026

Inside cities and towns in Unicoi County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

Building code adoptedAdopted (with conditions)
One- and two-family residential construction within Erwin.
- Erwin is listed as EXEMPT from the State Residential Building Program; the cited state page does not identify Erwin's local code edition.
“Erwin | EXEMPT | [...] EXEMPT - The jurisdiction has received an exemption”
Residential Permits: Residential Jurisdictions & Inspectors ↗Re-checked Oct 3, 2026
One more reviewed finding on this topic
- Adopted (with conditions) — One- and two-family residential construction within the Town of Unicoi.
  “Unicoi | EXEMPT | [...] EXEMPT - The jurisdiction has received an exemption”
  Residential Permits: Residential Jurisdictions & Inspectors ↗Re-checked Oct 3, 2026
Local zoningPresent
Land use within the corporate limits of the Town of Erwin, Tennessee.
- Land use is governed by Ordinance No. 383, titled "Zoning Ordinance, Erwin, Tennessee," and any amendments thereto.
- Ordinance No. 383 and amendments are published as separate documents and are of record in the office of the recorder.
- The town's subdivision regulations are also published as a separate document and are of record in the recorder's office.
“14-201. Land use to be governed by zoning ordinance. Land use within the Town of Erwin shall be governed by Ord. #383, titled "Zoning Ordinance, Erwin, Tennessee," and any amendments thereto.”
Municipal Code of the Town of Erwin, Tennessee ↗Re-checked Oct 7, 2026
3 more reviewed findings on this topic
- Present (with conditions) — Land use within the Town of Unicoi, Tennessee.
  “Land use within the Town of Unicoi shall be governed by Ord. #95-201, titled "Zoning Ordinance, Unicoi, Tennessee," and any amendments thereto.”
  Town of Unicoi Municipal Code ↗Re-checked Oct 6, 2026
- Present (with conditions) — Land use within the Town of Erwin, Tennessee.
  “Land use within the Town of Erwin shall be governed by Ord. #383, titled "Zoning Ordinance, Erwin, Tennessee," and any amendments thereto.”
  Town of Erwin Municipal Code ↗Re-checked Oct 6, 2026
- Present — Land use within the corporate limits of the Town of Unicoi, Tennessee.
  “14-201. Land use to be governed by zoning ordinance. Land use within the Town of Unicoi shall be governed by Ord. #95-201, titled "Zoning Ordinance, Unicoi, Tennessee," and any amendments thereto.”
  Municipal Code of the Town of Unicoi, Tennessee ↗Re-checked Oct 7, 2026

Still unanswered

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

County-wide zoning — Countywide zoning authority and ordinance status in Unicoi County.
Zoning districts — Published zoning districts for Unicoi County.
Minimum dwelling size — Minimum dwelling-size requirements in Unicoi County.
Setbacks — Building setbacks in Unicoi County.
Lot coverage — Lot-coverage requirements in Unicoi County.

6 more unanswered

Building height
Living in an RV
Manufactured homes
Accessory dwellings
Off-grid sanitation
Well permit

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 Unicoi County, Tennessee

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

Unicoi County scores 66/100 on the Bolthole Index, a strong county profile. Its strengths: mixed durability signals and a stronger property-autonomy legal backdrop. Watch-outs: about 143,827 people within a 30-minute drive.

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

Unicoi County requires a building permit only in limited cases (such as floodplains or specific zones). 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 Unicoi County, Tennessee?

Land in Unicoi County runs about $10,994 per acre, based on the latest county data.

What is the water situation in Unicoi County?

Unicoi County gets about 51.1" of rain a year, with severe drought in roughly 0.7% of years.

How remote is Unicoi County?

A representative private-land location has about 143,827 people within a 30-minute drive and 3,007,364 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.

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

At a glance

Who to call

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

Who handles building and planning questions in Unicoi County?

Does Unicoi County have zoning?

How do septic permits work in Unicoi County?

Can you live in an RV or tiny home on your land in Unicoi County?

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

What should you check before buying land in Unicoi County?

Watch-outs

Sources

Compared with neighboring counties

Unicoi County in Tennessee

How Unicoi County scores

Find land. Bring the promising ones back.

Parcel due diligence

Cities and towns in Unicoi County

Answers from the rulebook for Unicoi County

Unicoi County rules

Tennessee rules that apply here

Inside cities and towns in Unicoi County

Still unanswered

Living off-grid in Unicoi County, Tennessee

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

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

How much does land cost in Unicoi County, Tennessee?

What is the water situation in Unicoi County?

How remote is Unicoi County?

How Unicoi compares in Tennessee