Roof Replacement Permit in Thurston County, Washington
By Mario Bailey Last checked 2026-07-19 · 1 official source
Verified against official sources Confirmed on official pageIt depends
Quick answer
Like-for-like roof repair and replacement is exempt from a county building permit in Thurston County. A permit is needed if the project adds skylights or changes, repairs, or replaces any structural elements or the roof pitch or slope.
Typical threshold: Roof repair and replacement is exempt unless the work adds skylights or changes, repairs, or replaces structural elements or the roof pitch or slope.
Who is pulling this permit?
Apply yourself
Hire it out
Before you sign, ask the contractor:
- Who pulls the permit, you or me, and is the permit fee included in the bid?
- Which inspections will this job need, and who meets the inspector on site?
- Is your contractor license active in this locality, and under which business name?
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When a permit is usually needed
Only when adding skylights or altering roof structure or pitch
What roof replacement permit costs in Thurston County
Building permit and plan review fees are valuation based; see the county 2026 Residential Building Fee Guide.
How Thurston County compares in Washington
| Jurisdiction | Permit needed? | Threshold |
|---|---|---|
| Bellevue | It depends | permit required when modifying or replacing the roof sheathing or making structural changes; simple shingle replacement may not require a permit |
| Clark County | Permit required | Re-roofing permits are required for all buildings in Clark County; a separate permit may be required if structural work such as replacing roof sheathing is necessary. |
| King County | No permit needed | Not specified |
| Pierce County | It depends | Re-roofing of a Group R, Division 3 one or two family dwelling, or a Group U private garage, carport, or accessory structure, with a roof slope greater than 2:12, is exempt if the total load of all roof coverings does not exceed 7.5 lbs per sq ft; the exemption does not apply to vegetated roofs or to replacement of roof sheathing. |
| Seattle | No permit needed | Not specified |
| Snohomish County | It depends | re-roof overlay or tear-off-and-replace of a residential roof exempt if limited to 2 total layers of roofing material, uses the same type of roofing material as the existing roof, and the roof sheathing is not removed or replaced; adding a layer beyond 2, changing material type, or replacing sheathing requires a permit |
| Thurston Countythis page | It depends | Roof repair and replacement is exempt unless the work adds skylights or changes, repairs, or replaces structural elements or the roof pitch or slope. |
How to apply in Thurston County
A residential reroof permit application is lighter than for structural work: you state whether the scope is a full tear-off (roof replacement) or an overlay (roof recover), describe the covering material and its manufacturer instructions, and note the condition of the existing deck, since those facts determine which code path applies.
What most roof replacement permit applications include:
- State on the application whether the job is a roof replacement, which strips all existing layers down to the bare deck, or a roof recover, which leaves the old covering in place under specific conditions, since the two scopes are governed differently (IRC R908.3).
- A recover is only an option where the new covering follows the roof covering manufacturer's approved instructions or is a self-supporting system, such as standing-seam metal, that does not rely on the existing roof for support (IRC R908.3.1).
- Full tear-off must be scoped on the application instead of a recover when the existing roof is water soaked or deteriorated, is slate, clay, cement, or asbestos-cement tile, or already carries two or more layers of roof covering (IRC R908.3.1.1).
- The materials and installation methods described on the application must comply with the reroofing requirements of the roof-assemblies chapter (IRC R908.1).
- If the scope reuses existing slate, clay, or cement tile, damaged or broken pieces cannot be listed for reinstallation, and any rusted or deteriorated flashings, edgings, outlets, or vents uncovered during tear-off must be scoped for replacement (IRC R908.5).
General submittal guidance from IRC Section R908 Reroofing (text as adopted in the 2020 Residential Code of New York State, based on the 2018 IRC). Source. Community Planning and Economic Development - Building Development Center sets the exact checklist for Thurston County.
Where to apply in Thurston County:
Community Planning and Economic Development - Building Development Center
- 3000 Pacific Ave SE, Suite 100, Olympia, WA 98501
- Phone: 360-786-5490
- Email: permit@co.thurston.wa.us
Inspections and closing out your permit
Most residential reroofs get two to three field inspections keyed to the scope of work: a deck or nailing check when sheathing is exposed or replaced, a final on the completed covering and flashings, and in some high-wind regions a dedicated check of mitigation measures added during tear-off.
- Where the covering is fully removed and the sheathing is exposed, replaced, or added, inspectors check the deck and its nailing before any new roofing goes down, since the structural framework must be able to carry the new covering's loads (IRC R908.2).
- An overlay is only approved where it meets one of the code's listed recover conditions, such as installation in accordance with the covering manufacturer's approved instructions (IRC R908.3.1).
- Flashings disturbed or replaced during the job are checked against the approved manufacturer's installation instructions, and metal flashing that will receive bituminous material must be primed before installation (IRC R908.6).
- A final inspection confirms the completed roof covering and its fasteners were installed as required for that material and per manufacturer instructions before the permit is closed (IRC R905).
- In some regions with strengthened wind provisions, reroofing an older single-family home also triggers inspection of supplemental deck-nailing and a secondary water barrier added during tear-off, on top of the base reroofing requirements (Florida Building Code, Residential R908.7 Mitigation).
- Reinstalled existing slate, clay, or cement tile is checked against reuse limits at inspection, and any rusted, damaged, or deteriorated flashings, edgings, outlets, or vents found during tear-off must be replaced rather than reinstalled (IRC R908.5).
Schedule each inspection in advance and pass the final before you use the work or close the permit. Request inspections through the Thurston County permit portal or by phone at 360-786-5490.
Inspection sequence from IRC Section R908 Reroofing and Section R905 Roof Coverings (2021 International Residential Code). Source. An open permit left un-inspected can surface later in a title search or home sale.
Your Roof Replacement Permit checklist for Thurston County
- Confirm the requirement. Sometimes, depending on the project. Typical threshold: Roof repair and replacement is exempt unless the work adds skylights or changes, repairs, or replaces structural elements or the roof pitch or slope. Usually needed: Only when adding skylights or altering roof structure or pitch.
- Budget the fee. Building permit and plan review fees are valuation based; see the county 2026 Residential Building Fee Guide. Official fee schedule.
- Apply. A residential reroof permit application is lighter than for structural work: you state whether the scope is a full tear-off (roof replacement) or an overlay (roof recover), describe the covering material and its manufacturer instructions, and note the condition of the existing deck, since those facts determine which code path applies. Start at the Thurston County permit portal.
- Keep the office details handy. Community Planning and Economic Development - Building Development Center. Phone: 360-786-5490. Address: 3000 Pacific Ave SE, Suite 100, Olympia, WA 98501.
- Plan for inspections. Most residential reroofs get two to three field inspections keyed to the scope of work: a deck or nailing check when sheathing is exposed or replaced, a final on the completed covering and flashings, and in some high-wind regions a dedicated check of mitigation measures added during tear-off.
Compiled from the official sources on this page. Last checked 2026-07-19.
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Frequently asked questions
- Do you need a roof replacement permit in Thurston County?
- Like-for-like roof repair and replacement is exempt from a county building permit in Thurston County. A permit is needed if the project adds skylights or changes, repairs, or replaces any structural elements or the roof pitch or slope. Roof repair and replacement is exempt unless the work adds skylights or changes, repairs, or replaces structural elements or the roof pitch or slope. Always confirm with the office before starting.
- How much does a roof replacement permit cost in Thurston County?
- Building permit and plan review fees are valuation based; see the county 2026 Residential Building Fee Guide. See the official fee schedule for current amounts.
- Where do you apply for a roof replacement permit in Thurston County?
- You can apply through the Thurston County permit portal or contact the Community Planning and Economic Development - Building Development Center directly. The links are listed on this page.
From the Library
What else needs a permit in Thurston County
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Deck Permit | It depends | Decks are exempt if the surface is 30 inches or less from the ground to the top of the deck. | Building permit and plan review fees are valuation based; |
| Electrical Permit | Permit required | Electrical work in unincorporated Thurston County requires a state electrical permit from L&I; the county itself does not issue electrical permits, with limited work exceptions under WAC 296-46B-901. | L&I sets electrical permit fees; |
| Fence Permit | It depends | Fences 8 feet tall or shorter are exempt from a county building permit. | Building permit and plan review fees are valuation based; |
| HVAC Permit | It depends | Heating and cooling equipment and gas piping require a Minor Permit, but replacement of electric forced-air heating units and water heaters is exempt. | Minor Permit fees apply; |
| Patio Permit | It depends | Patios and porches are exempt if 30 inches or less from the ground to the top of the surface. | Building permit and plan review fees are valuation based; |
| Plumbing Permit | Permit required | No permit is needed only to clear a blockage or to repair or stop a leak in a drain, water, soil, or vent pipe. | Minor Permit fees apply; |
| Pool Permit | It depends | Pools are exempt only if prefabricated, entirely above ground, less than 24 inches deep, and under 5,000 gallons capacity. | Building permit and plan review fees are valuation based; |
| Shed Permit | It depends | One-story detached accessory buildings with no plumbing or electricity are exempt if under 200 square feet inside a county urban growth area or under 400 square feet outside a UGA. | Building permit and plan review fees are valuation based; |
| Solar Permit | It depends | Residential rooftop solar PV systems need no county permit; ground-mounted and commercial systems require county permits, and every solar project needs a state L&I electrical permit. | Building permit and plan review fees are valuation based; |
Roof Replacement Permit in other Washington localities
Official sources
Verified by a person against the sources above on 2026-07-19, not confirmed with Community Planning and Economic Development - Building Development Center. Rules change; confirm before you build. How we verify.
Last checked: 2026-07-19Report an error on this page
Compare Roof Replacement Permit requirements across Washington localities
Permit office
Community Planning and Economic Development - Building Development Center
360-786-5490Permit portalWashington rule changes
- Bellevue, WA sets a flat $290 re-roof permit fee (Ordinance 6879)
Ord. 6879 · 2026-07-25