City of Renton building permits: fees, timelines & requirements (2026)
Every fee, threshold, and review window for City of Renton permits — cited to the city's own page and re-verified weekly. Covers ADU, addition, kitchen, bathroom, basement, deck, fence, siding, windows, flooring, roofing, HVAC, electrical, plumbing, and ancillary permits (King County).
21 of 24 project types have authoritative rules on file · 17 typically require a permit · 4 often do not.
Look up your City of Renton address
Get your lot in 3D with zoning, setbacks, and the exact permits your project needs — cited to City of Renton's source.
Permit department
Renton uses TRAKiT permits portal.
Adopted code cycles
2021 IRC w/ WA amendments · 2021 WSEC
Resources
Construction permits
| Project | Permit? | Threshold | Fee | Review days | Source |
|---|---|---|---|---|---|
| Kitchen remodel | Yes | Cosmetic-only refresh (cabinets, countertops, flooring, paint) without structural/electrical/plumbing changes is generally exempt under 2021 IRC R105.2 (work exempt from permit). Any new circuit, fixture relocation, or structural change requires permits. | Fees set by jurisdiction. WA Building Code Council surcharge: $4.50 per building permit. Trade permits separate. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-17 |
| Bathroom remodel | Yes | Like-for-like fixture replacement in same location with no plumbing rerouting and no new circuits: typically exempt under 2021 IRC R105.2(2)(g). Any relocation, new fixture, new circuit, or shower-pan replacement triggers permits. | Fees set by jurisdiction. Plus separate electrical, plumbing, and mechanical permits. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-17 |
| Basement finish | Yes | 2021 IRC R310: every sleeping room below grade requires emergency escape and rescue opening (egress window). Min sill height 44in, min net clear opening 5.7 sq ft (5.0 grade-floor), min width 20in, height 24in. Ceiling height min 7ft (R305). Entire newly conditioned area must comply with WSEC R402. | Plan-review fee scales with valuation. State surcharge $4.50. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-17 |
| Deck | Yes | A deck is exempt only if 30 inches or less above grade, not over a basement/story below, and not part of an accessible route (RMC 4-5-060 §105.2). Above 30 inches a building permit is required; guards are required at walking surfaces over 30 inches. | Most jurisdictions handle decks as field-inspection or simplified plan review. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-29 |
| Fence | Yes | A fence taller than 6 feet requires a building permit (or a written exemption from the Building Official); fences 6 feet and under are exempt. Front-yard setback fences are limited to 48 inches and clear-vision areas to 42 inches (RMC 4-4-040). | Typically no fee unless permit required. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-29 |
| Siding | Often no | Replacement of nonstructural siding on IRC structures is exempt, except for veneer, stucco, or exterior finish and insulation systems (EFIS), which require a permit. | Typically minimal fee — like-for-like usually exempt. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-29 |
| Window replacement | Often no | In-kind window/door replacement is exempt when openings are not increased, no structural members are altered, the U-value meets the prescriptive WSEC requirement, and safety glass is provided where required. Enlarging an opening requires a permit. | Like-for-like usually no permit fee. Structural changes scale with valuation. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-29 |
| Flooring | Often no | Floor finish work (carpet, tile) is exempt finish work, provided existing required accessible features are not altered. | No permit fee for surface flooring. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-29 |
| ADU / DADU | Yes | Renton allows two accessory dwelling units (attached or detached) per legal lot (RMC 4-2-110A, Ord. 6160, 6-16-2025). Onsite owner-occupancy is not required and both units may be rented (HB 1337). Renton retained a 1,000 sq ft ADU maximum; ADU follows the residential-zone development standards (e.g., 5 ft side yard). The building plan-check fee is $0 for ADUs built through Renton's Permit-Ready ADU (PRADU) program. | Full Construction Permit (Addition/Alteration) fees. Sewer capacity charges may apply (King County: ~$8k-$10k). Apply via https://permits.rentonwa.gov. | 30–120 days | Cite verified 2026-06-16 |
| Roofing | Often no | In-kind re-roofing of one- and two-family dwellings is exempt provided the roof sheathing is not removed or replaced; otherwise a permit is required. | Flat fee or valuation-based. Typically $150-$400 for residential. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-29 |
| HVAC | Yes | A mechanical permit is required for fixed systems (furnace, heat pump, A/C, ducts, gas piping); portable heating/cooking/clothes-drying appliances are exempt. Emergency replacement requires an application the next business day. | Mechanical permit + electrical permit (if new circuit) + plumbing permit (if condensate to drain). Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-29 |
| Electrical | Yes | Electrical work requires a permit; in Renton the City building permit covers structure while electrical permits/inspections are administered by Washington State Labor & Industries. | L&I permit fees by circuit count + service size. Standard residential ~$60-$200. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-29 |
| Plumbing | Yes | New or rearranged piping requires a plumbing permit; stopping/repairing leaks and clearing stoppages are exempt, but removing and replacing a defective concealed trap, drain, water, soil, waste, or vent pipe is "new work" requiring a permit. | Plumbing permit fees by fixture count. Standard residential ~$80-$250. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-29 |
| Addition | Yes | Additions always require a building permit — they are expressly excluded from "ordinary repairs" (RMC 4-5-060 §105.2.2). Work started without a permit is subject to a special investigation fee equal to twice the permit fee. | Plan-review fee scales with valuation per UBC Table 1-A. State surcharge $4.50 per building permit. Trade permits (E/P/M) separate. Apply via https://permits.rentonwa.gov. | 30–120 days | Cite verified 2026-05-29 |
Ancillary & non-building permits
| Project | Permit? | Threshold | Fee | Review days | Source |
|---|---|---|---|---|---|
| Demolition | Yes | 2021 IBC Section 105.1 + WA-adopted IRC R105.1: demolition of any structure or portion thereof requires a permit. Tear-out of interior finishes only is generally treated as alteration. Asbestos / lead notification often required separately under WAC 173-303 / 296-62. | Demolition fees commonly charged as flat fee or by structure size. State surcharge $4.50 applies. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-17 |
| Right-of-way | Yes | Issued by city public works (or SDOT in Seattle) under local ROW ordinance. Triggered by physical occupation of or work within the public ROW including driveway aprons, curb cuts, sidewalk replacement, utility tie-ins, hauling routes, and temporary construction staging. | ROW permit fees vary widely by city; commonly $150-$500 for residential driveway/curb cut, plus per-day occupancy if street obstruction. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-17 |
| Side sewer | Yes | Side-sewer permits issued by the local utility (Seattle SPU; King County WTD; per-city utility elsewhere) under 2021 UPC + city utility code. Triggered by new connection, repair >2 ft of pipe, relining (CIPP), or capping at the property line for demolition. | Side-sewer permits typically $150-$500; depth-based surcharge in some cities. Utility-issued, not building-permit-issued. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-17 |
| Stormwater / drainage | Yes | KC Surface Water Design Manual 2021 (KCC 9.04 + adopted by reference in most KC cities) sets the 2,000 sqft new+replaced impervious threshold for "small project" drainage review; ≥5,000 sqft triggers full drainage review. Different thresholds in critical-area drainage basins. | Drainage review fee commonly tiered by project size; small project ~$300-$800, full drainage review $1,500+. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-17 |
| Land-use / zoning | Yes | Triggered when a project does not conform to the strict letter of the zoning code. Variances require a hardship finding under most city codes. Design review thresholds vary (Seattle: most multifamily + non-residential >4,000 sqft; many cities: design review only in designated districts). | Land-use fees vary widely; variance commonly $1,000-$3,000 + actual cost recovery for hearing examiner. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-17 |
| Tree removal | Yes | Triggered by removal of trees meeting the city's "significant tree" / "exceptional tree" / "tier" threshold. Common thresholds: ≥6in DBH (Bellevue tier 2+), ≥24in DBH (Seattle exceptional), or specific listed species. Single-family lots are sometimes exempt for non-exceptional trees. | Tree-removal permits commonly $50-$300 per tree; replacement bonds in some cities. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-17 |
| Signs | Yes | City sign code (typically Title 22 or 23) governs. Wall, freestanding, projecting, awning, and electronic message signs all require permits. Most cities exempt small temporary residential signs (real-estate, political) under area thresholds (~6 sqft). | Sign permit fees commonly $100-$400 plus electrical sub-permit. Apply via https://permits.rentonwa.gov. | — | Cite verified 2026-05-17 |
| Other / general | Pending verification | — | — | — | — |
How this page is built
Each row is the most-recently-verified authoritative rule on file for City of Renton and the listed project type. “Pending verification” means we have City of Renton in our database but haven't yet personally checked the city page for that project — those rows fall back to King-County or Washington-state baselines until verified.
See the data-quality leaderboard for how we keep these current, or run an address-specific lookup on the main permits page.