Submit the Addition/Alteration permit to Renton CED

How Renton CED permitting works

Renton's permit portal is the Civic Access Self-Service Portal (CASSP) at permitting.rentonwa.gov. All documents are submitted electronically — no paper accepted.

Contact: [email protected], 425-430-7215. Physical address: 1055 S Grady Way, 7th Floor, Renton WA 98057.

What gets submitted

A complete Renton CED Addition/Alteration submittal typically includes:

• Cover sheet — project address, scope summary, applicant info, designer of record, declared construction value.
• Architectural set — site plan, existing-conditions plans/elevations, proposed plans/elevations/sections.
• Structural set — stamped drawings + calcs (separate PDF).
• Survey — stamped boundary + topographic survey.
• Energy compliance package — WSU WSEC-R Alterations & Remodels form or REScheck report.
• Geotechnical report (if in Coal Mine Hazard Area or seismic hazard zone per RMC 4-3-050).
• Soils report (if required by structural engineer).
• Asbestos and lead survey results (recommended; required if abatement is in scope).

Fees

Renton's permit fees are set by the 2025-2026 fee schedule. For an addition/alteration scope, a typical permit package has three components:

1. Building permit fee — valuation-based. For a project valued between $100,001 and $500,000, the 2025 fee is $1,589.40 + $8.90 per $1,000 of valuation above $100,000. Worked examples on the 2025 schedule:

• $300,000 valuation → $1,589.40 + ($8.90 × 200) = $3,369.40
• $500,000 valuation → $1,589.40 + ($8.90 × 400) = $5,149.40
• $600,000 valuation (above $500K, different formula) → $5,149.40 + ($7.56 × 100) = $5,905.40

The 2026 schedule increases each band by roughly 3%.

2. Plan check fee — 65% of the building permit fee. Includes three review cycles. So at a $500K valuation: 65% × $5,149.40 = $3,347.

3. Sub-permit fees — one per trade, paid separately when each sub pulls their permit:

• Residential mechanical permit: $67 base (2025) / $69 (2026) + itemized fees per fixture/unit.
• Residential plumbing permit: $67 base (2025) / $69 (2026) + itemized fees per fixture.
• Residential electrical permit (new service): $277 (2025) / $286 (2026) for up to 200 AMP; $294 / $303 for over 200 AMP. Service changes and circuit additions are scheduled separately.
• Each sub-permit also carries a plan check at 40% of the permit fee.

Bottom line for a typical $300K–$600K whole-house remodel + addition: roughly $7,000 – $12,000 in total Renton permit fees, before any tree-review or critical-areas-review fees that may apply (those are scheduled separately in Section XII of the fee schedule).

Confirm the specific values for your project at submittal — Renton publishes a new fee schedule each year and the exact band rates change.

Plan review timeline

No official Renton CED plan review turnaround time was confirmed from a primary source. A contractor blog (low-confidence secondary source) cites 2–6 weeks. Ask Renton CED directly at the pre-application meeting for current first-review turnaround.