Washington County Building Inspections, run from the county Zoning Office at 100 E Main Street in Jonesborough, is the building authority for unincorporated Washington County. It enforces the 2018 IRC, sends electrical to the State of Tennessee, and permits manufactured homes for zoning compliance only.
Two Washington specifics catch people. A manufactured home gets a county permit for zoning compliance only, with the structural side through the state, and any alternative construction method — a barndominium, say — needs stamped drawings from a design professional. The county was the first Qualified Local Program for Stormwater Management in Tennessee, so land-disturbing work draws a stormwater review.
Scope: unincorporated Washington County through Building Inspections. Johnson City, Jonesborough and other municipalities permit their own work.
Electrical is the state's, and manufactured homes get a zoning permit only. Washington County's own guidance sends you to the State of Tennessee for electrical permits and inspections, and a manufactured home receives a county permit for zoning compliance only. Any alternative construction method, such as a barndominium, needs stamped drawings from a design professional — budget for that engineering up front.
What requires a permit in Washington County?
Building permits in unincorporated Washington County — Northeast Tennessee's Johnson City metro, with the historic town of Jonesborough as the county seat — are issued by Washington County Building Inspections, run out of the county's Zoning Office at 100 E Main Street, Suite 3 in Jonesborough. Johnson City, Jonesborough and other municipalities run their own permitting, so confirm the parcel is in the unincorporated county before applying.
The county has adopted and enforces the 2018 International Residential Code. Electrical is not a county permit: the county's own guidance states that electrical permits are issued by the State of Tennessee, so the electrical record runs through the state's CORE system and its Deputy Electrical Inspectors rather than the county. All applicable inspections must be completed before a certificate of occupancy issues. Tennessee does not have one permitting model, it has three, and which one applies decides who your building official actually is. A jurisdiction that has adopted codes meeting the state minimum and enforces them is an exempt jurisdiction: it runs its own plan review, permits and inspections, and the state stays out except for state buildings, schools and a handful of licensed occupancies. A jurisdiction that has not is non-exempt, and the State Fire Marshal's Office is the building official there, working through contracted deputy building inspectors who cover several counties each. And a jurisdiction that has passed a two-thirds resolution under T.C.A. § 68-120-101(b)(1)(B) is an opt-out or non-code jurisdiction, where one- and two-family dwellings sit outside the statewide standards altogether.
Two Washington County specifics catch people. A manufactured home gets a county permit for zoning compliance only — the structural side runs through the state modular and manufactured-home programs — and alternative construction methods, including barndominium-style dwellings, require stamped drawings from a design professional. Barndominiums are allowed anywhere single-family dwellings are, subject to those stamped drawings and to subdivision and deed restrictions. Two residential details are worth knowing before you design. Automatic fire sprinklers under IRC Section R313 are not mandatory in Tennessee — T.C.A. § 68-120-101(a)(8) prohibits the State Fire Marshal from requiring them in one- and two-family dwellings, though a municipality may impose its own requirement. And the residential code reaches additions of thirty square feet or more of interior space, which is a smaller trigger than most people assume.
No political subdivision of Tennessee may adopt or enforce standards of fire prevention, fire protection or building construction that are less stringent than the state minimum. Local amendments can add to the code; they cannot subtract from it.
Permit required
- New residential construction and additions
- Structural alterations, repairs, and changes of occupancy
- Accessory structures above the county threshold
- Alternative construction — with stamped design-professional drawings
- Manufactured homes — for zoning compliance
- Plumbing, mechanical, and gas work
- Electrical work — a state permit through CORE
- Land-disturbing activity under the county stormwater program
Typically exempt
- Painting, flooring, and cosmetic finishes
- Routine maintenance not altering structure or a regulated system
- Work inside Johnson City, Jonesborough, or another city
- Minor work below the county's published thresholds
Washington County building department: who handles permitting
The county's Zoning Office handles the permitting and approval process for building projects alongside its zoning and stormwater duties, with a building official and a small team. That combined structure is why the building permit, the zoning check and the stormwater review sit close together here — useful on a project that touches all three, but a reason to be clear about which approval you are asking for.
The electrical arrangement is the clean version of Tennessee's usual split: the county page states directly that electrical permits are issued by the State of Tennessee. So a Washington County house runs a county building permit and a state electrical permit on separate tracks, with the state's Deputy Electrical Inspectors handling the electrical inspections. Budget for the two applications from the start.
Washington County was named the first Qualified Local Program for Stormwater Management in Tennessee, in January 2013. Land-disturbing activity beyond the threshold draws a stormwater review, and on a manufactured-home placement the county permit confirms zoning compliance while the structural approval runs through the state. Alternative construction methods need a design professional's stamped drawings, so a non-traditional build should budget for that engineering up front.
| Detail | Information |
|---|---|
| Authority | Washington County Building Inspections (Zoning Office) |
| Covers | Unincorporated Washington County |
| Cities running their own | Johnson City, Jonesborough, and others |
| Office | 100 E Main Street, Suite 3, Jonesborough, TN 37659 (PO Box 417) |
| Codes enforced | 2018 International Residential Code |
| Electrical | Issued by the State of Tennessee (CORE) |
| Manufactured homes | County permit for zoning compliance only |
| Alternative construction | Stamped design-professional drawings required |
| Stormwater | First Qualified Local Program in Tennessee (2013) |
State electrical, zoning-only manufactured permits, stamped drawings for alternative builds. Washington County sends electrical to the State of Tennessee, permits manufactured homes for zoning compliance only, and requires stamped design-professional drawings for any alternative construction method. Confirm the parcel is unincorporated before you file.
Confirm from the parcel whether the site is unincorporated Washington County or inside Johnson City, Jonesborough or another city, because the permitting office changes at the city line. Washington County issues permits for the unincorporated area only.
Washington County permits: record types and what each covers
Washington County runs residential building records, with electrical routed to the state. These are the records you are likely to file:
Residential permit types
| Permit type | What triggers it | Review path | Fee basis |
|---|---|---|---|
| New construction | New dwellings, additions, and accessory structures above the local size threshold | Plan review against the adopted residential code, plus zoning; the state floor is the 2018 IRC with Appendix Q | Valuation-based |
| Addition | Added interior space, including additions of thirty square feet or more | Structural and energy review; the thirty square foot interior trigger is smaller than most applicants expect | Valuation-based |
| Renovation / alteration | Structural changes, layout changes, or added plumbing, mechanical, or electrical | Plan review scaled to scope; renovations of existing one- and two-family dwellings sit outside the state minimum standards | Valuation-based |
| Reroof | Roof covering replacement, recover, and structural deck repair | Deck and dry-in inspection; plan review rarely required | Valuation or squares |
| Solar photovoltaic | Rooftop or ground-mount arrays, with or without battery storage | Structural review of the attachment locally, with the electrical scope usually permitted and inspected by the state | Flat or system-size based |
| Battery energy storage | Wall or floor-mounted storage added to a dwelling | Electrical review plus fire separation and location check | Flat or per-permit minimum |
| Electrical | Service changes, panel upgrades, new circuits, EV chargers, and rewiring | In most of Tennessee a state record bought through CORE and inspected by a contracted Deputy Electrical Inspector, not a local one | Per-permit or per-device |
| Plumbing | New piping, repipes, fixtures, gas piping, and water heater replacement | Trade review; performed by a licensed plumber or a Limited Licensed Plumber below the contractor threshold | Per-permit minimum or per-fixture |
| Mechanical / HVAC | Changeouts, new ductwork, and refrigeration | Trade review; the contractor licence attaches once the trade portion reaches the statutory threshold | Per-permit minimum or per-unit |
| Deck and porch | New decks, screened porches, and structural rebuilds | Structural review of footings, ledger attachment, and guards | Valuation or flat |
| Swimming pool | In-ground and above-ground pools | Barrier, bonding, and electrical review; the bonding scope generally follows the state electrical record | Valuation or flat |
| Manufactured home set-up | Placing or re-siting a manufactured home | Zoning, floodplain, and anchoring review; manufactured homes sit outside the state minimum building standards but not outside local zoning | Flat or per-unit |
| Demolition | Full or partial demolition of a dwelling or accessory structure | Utility disconnect confirmation and site restoration check | Flat |
| New single-family dwelling | Building a new home in the unincorporated county | County building review against the 2018 IRC; state electrical | Fee by scope |
| Barndominium or alternative build | An alternative construction method | Building review with stamped design-professional drawings required | Fee by scope plus engineering |
Commercial permit types
| Permit type | What triggers it | Review path | Fee basis |
|---|---|---|---|
| New commercial construction | Ground-up commercial, industrial, and institutional buildings | Concurrent review against the adopted building code, fire, and zoning; the state floor is the 2021 IBC with Tennessee amendments | Valuation-based |
| Tenant improvement / upfit | Interior fit-out of an existing tenant space | Building, trade, and life-safety review; accessibility attaches on change of use | Valuation-based |
| Change of occupancy | Converting a building or space to a different use group | Occupancy classification, egress, and accessibility review | Valuation or flat |
| Commercial electrical | Service, distribution, and branch circuit work | State record in most jurisdictions unless the municipality is one of the roughly thirty-five authorised to inspect its own electrical | Per-permit or valuation |
| Commercial plumbing | Process piping, fixtures, backflow, and grease waste | Trade review; backflow and grease interceptor sign-off where applicable | Per-fixture or valuation |
| Commercial mechanical | Rooftop units, kitchen exhaust and hood systems, and refrigeration | Trade review; hood and suppression systems draw fire review alongside mechanical | Per-unit or valuation |
| Commercial reroof | Roof covering replacement on a commercial structure | Deck, dry-in, and attachment inspection | Valuation or squares |
| Signage | Wall, ground, and illuminated signs | Zoning review for size and placement, plus electrical where illuminated | Flat or per-sign |
| Land disturbance | Clearing, grading, and stormwater-triggering site work | Erosion and sediment control review, separate from the building permit | Acreage-based |
| Commercial demolition | Full or partial demolition of a commercial structure | Utility disconnect, asbestos notification, and site restoration | Flat or valuation |
| State Fire Marshal plans review | Occupancies requiring State Fire Marshal approval, including schools and certain licensed facilities | Filed with the state through the plans submittal portal, in addition to and not instead of the local record | State fee schedule |
| Commercial new construction | A new commercial building in the county | Full building review; electrical to the state | Fee by scope |
| Manufactured home placement | Placing a manufactured home | County zoning-compliance permit plus state structural approval | Fee by scope |
Residential
- Single-discipline review in most cases
- The electrical record is usually a separate state permit, not a line on the building permit
- Contractor licence attaches at the statutory threshold; a Home Improvement licence may apply below it in nine counties only
- Septic properties need TDEC approval before ground is broken
Commercial — multi-discipline
- Concurrent review across building, trades, fire, and zoning
- Signed and sealed plans across every affected discipline
- The licensee's monetary limit caps the job value, separately from the permit
- Accessibility and life-safety review attach to any change of occupancy
Records you will actually see in Washington County
| Record | What it covers |
|---|---|
| Residential building permit | New homes, additions, alterations, and repairs |
| Alternative construction | Barndominium-style builds, with stamped drawings |
| Manufactured home | County permit for zoning compliance |
| Accessory structure | Above the county threshold |
| Plumbing / mechanical / gas | Trade permits under the 2018 codes |
| State electrical permit | Through core.tn.gov, not the county |
| Land disturbance / stormwater | Under the county's stormwater program |
| Demolition permit | Full or partial demolition |
Solar permits in Washington County
Solar is reviewed on two tracks at once in Tennessee, and in most of the state those two tracks belong to two different governments. The structural side — attachment detail, rail spacing, and whether the existing framing carries the added dead load — is a local building review. The electrical side — conductors, overcurrent protection, rapid shutdown, labelling, and the service or supply-side connection — usually runs on a state electrical record instead, against the National Electrical Code edition the state programme enforces.
A residential solar installation in unincorporated Washington County is a county building permit for the structural attachment plus a state electrical permit for the wiring, because the county's own guidance sends electrical to the State of Tennessee. So a solar job runs a county building record and a state electrical record on separate tracks, with the state's Deputy Electrical Inspectors handling the electrical inspection. The local power company sets the meter release on an approved electrical inspection, so confirm the interconnection path early.
That split is the most common cause of a stalled Tennessee solar job. An installer who files the building record locally and assumes the electrical inspection comes with it will sit waiting for an inspector who was never booked. Confirm at the outset whether your jurisdiction is one of the roughly thirty-five municipalities authorised to run its own electrical inspections, or whether the electrical permit has to be bought from the state.
Interconnection runs on a third clock. Tennessee is served by the Tennessee Valley Authority through local power companies — municipal electric systems and rural electric cooperatives — and each sets its own application, meter and witness-test sequence. Permission to operate is not something the building department controls, so plan for the tracks to finish at different times.
Roofing permits in Washington County
A roof covering replacement needs a permit in most Tennessee jurisdictions that enforce their own codes. The permit is usually quick, but it is not optional, and the inspection that matters happens before the covering goes on rather than after.
Tennessee has no statewide product-approval database, so there is no approval number to search for or cite on the application. The assembly has to comply with the adopted code and the manufacturer's listed installation instructions, and that pairing is what the inspector checks — which makes the manufacturer's instructions a document worth having on site.
A re-roof in unincorporated Washington County is a county building permit reviewed against the 2018 IRC. A like-for-like replacement is straightforward; adding load or altering the roof structure draws closer review. On an alternative construction method the stamped design-professional drawings govern the assembly, so a non-traditional dwelling's re-roof should reference those drawings rather than a generic detail.
Sequencing is where reroofs go wrong. The deck and dry-in condition has to be visible when the inspector arrives, so covering it first means opening it back up. Where a previous layer has been torn off, expect attention to deck fastening and to any sheathing replaced along the eaves. Note also that a roofing subcontractor is licensed on the value of the roofing portion alone once that portion reaches the statutory threshold.
Washington County permit cost
Washington County building permit fees are set by Building Inspections against the submitted scope. Because electrical is a state permit, the electrical cost is a state fee through CORE rather than a county line item, and an alternative construction method carries the added cost of a design professional's stamped drawings.
Confirm the current fee basis with the department before budgeting. On a manufactured-home placement, account for the county zoning-compliance permit and the separate state structural approval, and on any land-disturbing project allow for the county stormwater review.
| Fee component | How it works |
|---|---|
| Building permit | Set by Building Inspections against the submitted scope |
| Electrical | State fee via CORE, not a county line item |
| Manufactured home | County zoning-compliance permit plus state structural approval |
| Alternative construction | Added cost of stamped design-professional drawings |
| Stormwater | Review for land-disturbing activity beyond the threshold |
| Septic properties | TDEC approval required before ground is broken |
| Confirm | Fee basis with Building Inspections before budgeting |
Want a precise number for a specific Washington County project? Send us the scope and we will price the permit path before you file.
Washington County trade permits
Electrical is a state permit; other trades follow the county's residential review. Four Washington specifics decide whether your application moves:
Electrical is the state's
Washington County's own guidance states that electrical permits are issued by the State of Tennessee, so the electrical record runs through CORE and the state's Deputy Electrical Inspectors. Budget for a separate state application alongside the county building permit.
Manufactured homes get a zoning permit only
A manufactured home receives a county permit for zoning compliance only; the structural side runs through the state's modular and manufactured-home programs. Confirm both when placing a manufactured home.
Alternative construction needs stamped drawings
Alternative construction methods, including barndominium-style dwellings, require stamped drawings from a design professional. Barndominiums are allowed anywhere single-family dwellings are, subject to those drawings and to subdivision and deed restrictions.
Land-disturbing work draws stormwater review
As the first Qualified Local Program for Stormwater Management in Tennessee, the county reviews land-disturbing activity beyond the threshold for stormwater compliance. Scope that review into a project that clears or grades land.
Washington County permit application: how to apply step by step
Here is how to get a building permit in Washington County, from confirming the requirement through to close-out. Each step below corresponds to a real decision point where projects commonly stall.
Johnson City, Jonesborough and other municipalities permit their own work. Washington County issues permits for the unincorporated area only, so settle jurisdiction from the parcel before you start.
Design to the county's 2018 International Residential Code. For an alternative construction method such as a barndominium, prepare stamped drawings from a design professional.
On a septic property, obtain the TDEC approval before the county can issue. The system is sized to bedroom count, so adding bedrooms needs its own approval.
Apply with Building Inspections for the building permit, and apply separately to the State of Tennessee through CORE for the electrical permit. For a manufactured home, file for the county zoning-compliance permit and the state structural approval.
On a land-disturbing project, clear the county stormwater review under its Qualified Local Program before proceeding.
Book county building inspections, run the state electrical inspection on its own track, complete all applicable inspections, and obtain the certificate of occupancy before legal use.
Inspections in Washington County
County building inspections are scheduled against the issued permit, with typical checkpoints running footing and foundation, framing, trade rough-ins, insulation and final, reviewed against the 2018 IRC. All applicable inspections must be completed before a certificate of occupancy issues.
Electrical inspections run on the state's track through CORE, because electrical is a state permit here. The county building final and the state electrical final are separate approvals, so confirm both are cleared before expecting an occupancy certificate.
On a manufactured-home placement the county's role is the zoning-compliance check while the structural approval runs through the state, and on an alternative construction method the stamped drawings govern the inspection. On an existing building, confirm what was previously permitted against what is standing before a change of occupancy.
The county building final and the state electrical final are separate approvals — clear both before expecting a certificate of occupancy. On a manufactured home, the county checks zoning while the state handles the structural approval.
Washington County permit search and official resources
Washington County publishes its Codes Compliance, electrical and zoning information online, with the state licensing and electrical resources that sit alongside them.
- Washington County Codes Compliance
- Washington County Electrical Permits (state)
- Washington County Zoning, Planning & Building Codes
- TN Board for Licensing Contractors
- State electrical permits (CORE)
- TDEC subsurface sewage disposal
Frequently asked questions
Who issues building permits in Washington County, TN?
Washington County Building Inspections, run out of the county Zoning Office at 100 E Main Street, Suite 3 in Jonesborough, for unincorporated Washington County. Johnson City, Jonesborough and other municipalities run their own permitting.
Which building code does Washington County enforce?
The 2018 International Residential Code. As a local building authority under the statewide minimum standards, the county's adopted code governs residential construction, and all applicable inspections must be completed before a certificate of occupancy issues.
Does Washington County issue electrical permits?
No. The county's own guidance states that electrical permits are issued by the State of Tennessee, so the electrical record runs through the state's CORE system and its Deputy Electrical Inspectors rather than the county. Budget for a separate state application.
How does Washington County permit a manufactured home?
A manufactured home receives a county permit for zoning compliance only. The structural side runs through the state's modular and manufactured-home programs, so a placement involves both the county zoning-compliance permit and the state structural approval.
Are barndominiums allowed in Washington County?
Yes, anywhere single-family dwellings are allowed, subject to subdivision and deed restrictions. Because a barndominium is an alternative construction method, it requires stamped drawings from a design professional, so budget for that engineering up front.
What is the Washington County stormwater program?
Washington County was named the first Qualified Local Program for Stormwater Management in Tennessee, in January 2013. Land-disturbing activity beyond the threshold draws a stormwater review, so scope that into a project that clears or grades land.
Do I need a contractor licence in Washington County?
A Tennessee contractor licence is required to bid or perform work valued at twenty-five thousand dollars or more, including labour and materials, and the same threshold reaches trade subcontractors on their own portion.
Do I need a Home Improvement licence in Washington County?
No. Washington is not one of the nine Tennessee counties that require the Home Improvement licence. Below the twenty-five thousand dollar contractor threshold there is no separate state home improvement credential here, though local registration and trade licences still apply.
Do I need a septic approval before a building permit in Washington County?
On a parcel without public sewer, yes. The state's TDEC subsurface sewage disposal program issues the septic permit, and it must be in hand before the county can issue the building permit. The system is sized to bedroom count.
Where is the Washington County building office?
The county Zoning Office and Building Inspections are at 100 E Main Street, Suite 3 in Jonesborough, with a mailing address of P.O. Box 417, Jonesborough, TN 37659. Confirm the parcel is in the unincorporated county before applying.
Does Washington County check my HOA covenants?
No. Deed restrictions, covenants and subdivision regulations are private matters between the owner and the subdivision. A permit that clears the county can still breach a covenant, and the county will not have checked.
Does Johnson City use the same permitting office as Washington County?
No. Johnson City, Jonesborough and other municipalities run their own permitting inside their limits. Washington County issues permits for the unincorporated area only, so confirm the parcel before filing with Building Inspections.
Simplify Washington County permitting with Alliance Permitting
Washington County's state electrical route, its zoning-only manufactured-home permit, its stamped-drawing rule for alternative construction and its stormwater program reward applicants who line up the state electrical permit, budget the design-professional drawings, and scope the stormwater review early.
Trusted by leading builders, developers, and national contractors — 21 years of filing in the jurisdictions we write about.
Contractors and builders choose Alliance for Washington County because the work is done by people who have stood at the counter:
- Right authority — unincorporated county or Johnson City, Jonesborough or another city, resolved from the parcel.
- State electrical planned — the separate CORE permit lined up alongside the county building record.
- Non-traditional builds handled — stamped design-professional drawings prepared for alternative construction, and the zoning-only route understood for manufactured homes.
- Complete oversight — every Washington building record, state permit and inspection tracked across your jobs in one place.
Alliance Permitting is a permit documentation and expediting service in Tennessee. We are not a law firm and do not provide legal advice, and we are not the permitting authority.
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More Tennessee permitting guides
This guide is provided by Alliance Permitting for general information about Washington County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.