Bolthole Index

DeKalb County, Tennessee

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

73Index Score / 100
#43 of 95 in Tennessee

DeKalb County, Tennessee requires building permits before work begins on regulated projects, but it does not have countywide zoning regulations.12 Unoccupied, unconditioned detached garages, sheds, barns, decks and pole barns are permit-exempt; conditioning or occupying one triggers the permit requirement.3 Septic approval comes from the Tennessee Department of Environment and Conservation and is part of the county building-permit submittal.45

At a glance

Building permit
Required before work begins on regulated projects1
County zoning
No countywide zoning regulations2
Septic authority
Tennessee Department of Environment and Conservation4
Detached outbuildings
No permit when unoccupied and unconditioned3
Owner-builder
Available for a primary residence, with conditions6
Minimum home size
No county zoning minimum in unincorporated areas7
Final occupancy
Certificate required for buildings constructed under a county permit8

Who to call

Building permits

DeKalb County Building Department

Building-permit applications, general permit inquiries, plan requirements and county building inspections

931-256-1524

1 South Public Square, Smithville, TN 37166

Zoning

DeKalb County Planning Information

Planning questions and confirmation of the rules that apply to a DeKalb County parcel

931-979-2170

Septic permits

Tennessee Department of Environment and Conservation

Septic and groundwater questions for DeKalb County; TDEC evaluates sites, issues septic permits and completes final inspections

931-520-6688

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 DeKalb County, Tennessee?

Yes. DeKalb County requires permits to be issued before work begins on projects covered by its building program, and approved plans must remain at the site.1 The county may require footing, framing, rough-in and final inspections, and work cannot be concealed before inspection.9

A detached garage, shed, barn, deck or pole barn does not require a county permit when it is neither occupied nor conditioned; a permit is required if the structure is insulated, heated, cooled or occupied.3 Agricultural buildings used only for farm purposes may be exempt, but the county says applicable building-code and setback requirements still apply.10 DeKalb County adopted Tennessee building codes, so the absence of countywide zoning does not mean construction is code-free.11

Who handles DeKalb County building permits and inspections?

The DeKalb County Building Department handles permit applications, general inquiries and the county inspection process at the courthouse in Smithville.12 The county publishes a residential building-permit fee based on square footage, and that fee includes required inspections, plan review and as many as three re-inspections.12

A complete application package includes a site plan showing boundaries, setbacks, driveway and septic or well locations; a potable-water source; septic approval or sewer verification; construction plans; proof of ownership; owner and contractor information; and contractor license and insurance when applicable.5 Electrical permits and inspections are handled by the State of Tennessee rather than the county building inspector.3 Call the Building Department before design work is final if the use or occupancy will change, because additional documentation may be required.12

Does DeKalb County, Tennessee have zoning?

DeKalb County does not have countywide zoning regulations.2 For unincorporated land, that means there is no county zoning minimum for dwelling size, lot size, lot coverage or building height, but building-code, septic, subdivision and floodplain requirements can still constrain a project.7131415

The no-zoning answer should not be carried into an incorporated municipality: the reviewed sources did not establish which municipal zoning rules apply inside local city limits, so confirm jurisdiction before relying on the county rule.216 A land division intended for development with septic can require a TDEC subdivision evaluation, including a survey and a soils map prepared by a Tennessee-licensed soils consultant.17

How do septic permits work in DeKalb County?

TDEC, not DeKalb County, issues the septic permit and conducts the site evaluation for DeKalb County property.4 A permit is required to construct, modify or repair a septic system, and TDEC advises obtaining it before dirt work, a building pad or other construction begins.18 The applicant gives the issued permit to a licensed installer; after installation, the installer arranges a final inspection before the system is covered, and TDEC issues a Certificate of Completion after approval.1920

Only about 11.5% of county soils avoid a “very limited” rating for a conventional drain field, so soil evaluation is a serious pre-purchase item rather than paperwork to leave until construction.21 Alternative systems require an extra-high-intensity soils map from a Tennessee-licensed soils consultant.18

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

DeKalb County's lack of countywide zoning does not by itself establish that full-time RV living is allowed on a private parcel.2 We could not confirm a county rule for long-term RV occupancy or off-grid sanitation, so ask Planning Information and TDEC how a proposed setup would satisfy building, wastewater and utility requirements before buying land.1622

For a tiny home in unincorporated DeKalb County, there is no county zoning minimum dwelling size, but the structure still faces adopted building codes, permit review, septic or sewer approval and final occupancy requirements.71158 A shed or other detached structure loses its permit exemption when it is occupied or conditioned, so the outbuilding exemption is not a shortcut to residential occupancy.3

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

  1. Confirm that the parcel is outside an incorporated municipality and ask Planning Information what parcel-specific constraints need review.216
  2. Ask TDEC for a site evaluation and obtain septic approval before dirt work or construction if the site will not use public sewer.18
  3. Prepare the county submittal: site plan, water source, septic approval or sewer verification, construction plans, ownership proof and required contractor records.5
  4. Obtain the DeKalb County building permit before work starts and keep approved plans at the job site.1
  5. Schedule each required county inspection before work is concealed, while using the state process for electrical permits and inspections.9
  6. Complete every required inspection and obtain the Certificate of Use/Occupancy or Certificate of Completion before occupying the building.8

What should you check before buying land in DeKalb County?

Start with buildability, not the asking price. Confirm legal access and whether a driveway connecting to state highway right-of-way needs a TDOT highway entrance permit; the reviewed sources did not confirm a separate county driveway permit for other roads.235 Ask the Building Department about floodplain review because we could not confirm DeKalb County's floodplain-development process.12

Order septic due diligence early: only about 11.5% of mapped soils avoid severe conventional-drain-field limitations, while about 44.4% of county land has a slope of 15% or less.2124 Confirm whether public sewer is available, because a qualifying Tennessee utility can require connection for a building on an abutting parcel.25 For carrying cost context, the median property-tax bill is about $747 per year and the effective property-tax rate is about 0.4%.2627

Watch-outs

  • DeKalb County has no countywide zoning, but adopted building codes and permit requirements still apply to regulated projects.211
  • Do not start clearing, grading or a building pad before TDEC septic review when the project depends on onsite wastewater.18
  • A DeKalb County owner-builder exemption is limited to the owner's primary residence and carries use, timing and contractor conditions; it does not waive the building permit.6
  • Long-term RV occupancy, off-grid sanitation, private-well permitting and county-road driveway approval remain unconfirmed; ask Planning Information, TDEC and the Building Department before committing to a parcel.162212

Sources

  1. Building Department, quoted and re-checked
  2. Zoning and Planning, quoted and re-checked
  3. Building Department (2026 county census)
  4. TDEC - Subsurface Sewage Disposal Systems (SSDS) (2026 county census)
  5. Building Department, quoted and re-checked
  6. Building Department, quoted and re-checked
  7. Zoning and Planning, quoted and re-checked
  8. Permit Application, quoted and re-checked
  9. Building Department, quoted and re-checked
  10. Building Department, quoted and re-checked
  11. Zoning and Planning, quoted and re-checked
  12. DeKalb County Building Department (dekalbtennessee.com)
  13. Zoning and Planning, quoted and re-checked
  14. Zoning and Planning, quoted and re-checked
  15. Zoning and Planning, quoted and re-checked
  16. DeKalb County Planning Information (dekalbtennessee.com)
  17. Online Application for Septic Related Services, quoted and re-checked
  18. Subsurface Sewage Disposal System Frequently Asked Questions, quoted and re-checked
  19. Zoning and Planning, quoted and re-checked
  20. Subsurface Sewage Disposal System Frequently Asked Questions, quoted and re-checked
  21. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  22. Tennessee Department of Environment and Conservation (dekalbtennessee.com)
  23. Highway Entrance Permits (Tennessee statewide rule), quoted and re-checked
  24. Share of land at 15% slope or less: Bolthole Index county data
  25. Utility Customers Frequently Asked Questions (Tennessee statewide rule), quoted and re-checked
  26. Median property tax bill: Bolthole Index county data
  27. Effective property tax rate: 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.

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County locator

DeKalb County in Tennessee

73
County map
DeKalb County highlighted among the Tennessee counties · colored by Index score

How DeKalb County scores

Seclusion43100% ev.
Self-Sufficiency62100% ev.
Admin Boringness64100% ev.
Durability71100% ev.
Property Autonomy71100% ev.
Carry Cost80100% 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 →

$306kTypical home
0.4%Property tax
$4,806Land / acre
56"Annual rain
3.8% of yrsSevere drought
6.6 / yr (+6.2)Mid-century 100°F days
13.7 daysMid-century dry spell
2.35" (+7%)Mid-century 1-day rain
1.58×Wildfire change factor
100%Forward climate coverage
$1,689Home insurance / yr
0.6% / yrInsurance growth
2.05%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
52,243People within 30 min
3,463,880People within 2 hr
44,818Radius comparison (15 mi)
69.7People / sq mi
15.4%Federal land
44.4%Land at 15% slope or less
11.5%Septic soil without severe limits
18,227 acWorkable land screen
60.1%Wooded land
61.2 tonsBiomass / forest ac
58.3°FAvg temp

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Answers from the rulebook for DeKalb County

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

DeKalb County rules

  • Building permitRequired

    DeKalb County building projects requiring a county building permit.

    • Permits must be issued before work begins.
    • Detached garages, sheds, barns, decks, and pole barns that are not occupied or conditioned do not require a permit according to the county page.
    • If such a structure is insulated, heated, cooled, or occupied, a permit is required.
    • Approved plans must be available on site.
    • Changes from approved plans require review and approval.
    “Permits must be issued before work begins. Approved plans must be available on site. Changes from approved plans require review and approval.”
  • Owner-builder exemptionAvailable (with conditions)

    A homeowner performing work on the homeowner's primary residence.

    • The homeowner may perform work on the primary residence once every two years, subject to verification and applicable law.
    • The homeowner affidavit requires that the owner be the registered owner.
    • The residence must be for the owner's individual use and not for sale, lease, or rent.
    • The owner must not have built a single-family dwelling within the past two years.
    • The owner must perform all work covered by the permit and may not hire a construction manager.
    • If the owner ceases to act as owner-builder and hires a contractor, the permit becomes null and void.
    • If total construction work exceeds $25,000, the work must be performed by a licensed contractor under state law.

    construction value threshold: > 25000 USD (licensed contractor required)

    “Homeowners may perform work on their primary residence once every two (2) years, subject to verification and applicable law.”
  • Building code adoptedAdopted (with conditions)

    Building projects regulated by DeKalb County.

    • The county page states adoption was as of January 2011.
    “As of January 2011, DeKalb County adopted the State of Tennessee Building Codes.”
  • InspectionsLimited

    County building projects subject to the county inspection process.

    • Footing, framing, rough-in, and final inspections may be required.
    • Work must not be concealed prior to inspection.
    • Electrical permits and inspections are conducted by the State of Tennessee.
    “Footing, framing, rough-in, and final inspections may be required. Work must not be concealed prior to inspection.”
  • Certificate of occupancyRequired

    Buildings constructed under a DeKalb County permit.

    • The permit holder must complete all required inspections.
    • The building may not be occupied until a Certificate of Use/Occupancy or Certificate of Completion has been issued.
    • An issued permit becomes null and void if substantial work has not commenced within six months after issuance or if work is suspended or abandoned for six months after commencement.
    “The permit holder agrees to the following: to keep a set of construction documents and the issued permit onsite during construction, to have all required inspections completed, and to not occupy the building until a Certificate of Use/Occupancy or Certificate of Completion has been issued.”
  • County-wide zoningAbsent

    Countywide zoning regulation in DeKalb County.

    • The county source states that DeKalb County does not have zoning at this time.
    “DeKalb County does not have zoning at this time.”
  • Minimum dwelling sizeNone

    County zoning minimum-dwelling-size rules in unincorporated DeKalb County.

    • The county source states that DeKalb County does not have zoning at this time.
    • Building-code requirements may still apply.
    • Municipal rules may apply in incorporated areas.
    “DeKalb County does not have zoning at this time.”
  • Minimum lot sizeNone

    County zoning minimum-lot-size rules in unincorporated DeKalb County.

    • The county source states that DeKalb County does not have zoning at this time.
    • Septic and subdivision requirements may still impose parcel-related limits.
    • Municipal rules may apply in incorporated areas.
    “DeKalb County does not have zoning at this time.”
  • Lot coverageNone

    County zoning lot-coverage rules in unincorporated DeKalb County.

    • The county source states that DeKalb County does not have zoning at this time.
    • Building, septic, floodplain, and other non-zoning rules may still apply.
    • Municipal rules may apply in incorporated areas.
    “DeKalb County does not have countywide zoning regulations.”
  • Building heightNone

    County zoning building-height rules in unincorporated DeKalb County.

    • The county source states that DeKalb County does not have zoning at this time.
    • Building-code and safety requirements may still apply.
    • Municipal rules may apply in incorporated areas.
    “DeKalb County does not have zoning at this time.”
  • Agricultural exemptionAvailable (with conditions)

    Agricultural buildings used solely for farm purposes.

    • The county page states that such agricultural buildings may be exempt.
    • All structures must still comply with applicable building codes and setback requirements where applicable.
    “Agricultural buildings used solely for farm purposes may be exempt. All structures must still comply with applicable building codes and setback requirements where applicable.”
  • Permit processPublished (with conditions)

    DeKalb County building permit applications.

    • Required submittals include a site plan, potable water source, septic approval or sewer verification, construction plans, and proof of property ownership.
    • Owner and contractor information is required.
    • Contractor license and insurance are required if applicable.
    • Permits must be issued before work begins.
    • Approved plans must be available on site.
    • Changes from approved plans require review and approval.
    “Site plan (boundaries, setbacks, driveway, septic/well)”

Tennessee rules that apply here

  • Who permits septicState (with conditions)

    Subsurface sewage disposal systems serving property in DeKalb County.

    • TDEC conducts the site evaluation and final inspection, with a licensed installer performing the installation.
    • The county page directs septic and groundwater questions to TDEC.
    “A TDEC Environmental Scientist will conduct a site evaluation to determine the type of septic system required for your property.”
  • 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
  • Septic inspectionRequired

    Permitted septic system installations in DeKalb County.

    • The installer must contact the local Environmental Scientist to schedule 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. If the septic system installation is approved, the Environmental Scientist will issue a Certificate of Completion.”
  • 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."”
  • Subdividing landRegulated (with conditions)

    Division of tracts or parcels in DeKalb County where a septic system is or will be used.

    • A subdivision evaluation is required for division into two or more lots, sites, or other divisions for immediate or future construction where septic will be used.
    • A survey and soils map must be submitted.
    • The soils map must be prepared by a soils consultant licensed in Tennessee.
    • A subdivision does not include division into two or more tracts or parcels when all are five acres or larger.

    minimum acreage exception: >= 5 acres (all resulting tracts or parcels)

    “A Subdivision Evaluation is required if you want to divide any tract or parcel of land into 2 or more lots, sites or other divisions for the purpose of immediate or future construction of houses, buildings, or other development where a septic system is or will be used.”
  • 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”
  • 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.

  • Local zoning — Zoning administered by municipalities or other local authorities within DeKalb County.
  • Off-grid sanitation — Off-grid sanitation arrangements in DeKalb County.
  • Well permit — Private water-well permitting for property in DeKalb County.
  • Building in a floodplain — Floodplain development in DeKalb County.
  • Short-term rentals — Short-term rental use in DeKalb 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 DeKalb County, Tennessee

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

DeKalb County scores 73/100 on the Bolthole Index, a strong county profile. Its strengths: manageable long-term carry cost and mixed durability signals.

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

DeKalb 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). 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 DeKalb County, Tennessee?

Land in DeKalb County runs about $4,806 per acre, based on the latest county data.

What is the water situation in DeKalb County?

DeKalb County gets about 56" of rain a year, with severe drought in roughly 3.8% of years.

How remote is DeKalb County?

A representative private-land location has about 52,243 people within a 30-minute drive and 3,463,880 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 DeKalb County means bringing your own water and power. The kit we’d start with:

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How DeKalb compares in Tennessee

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