Addition permits in City of Redmond: fees, timeline & requirements (2026)

When does a home addition need a permit in City of Redmond?

Additions, alterations, and remodels require a building permit with a site plan. Garage conversion to living space also requires a permit. All trade (electrical/plumbing/mechanical) and fire sub-permits must be completed and passed before the Building Final.

In the source's own words

“Additions, alterations and remodel.”

Source ↗verified 2026-09-24

Required submittals

• Site plan (Redmond Residential Addition Site Plan example)
• Building permit plan set (foundation, floor plan, framing, elevations, roof plan, structural)
• Landscape plan (if applicable)

Inspection sequence

1. foundation/footing
2. plumbing rough-in
3. electrical rough-in
4. mechanical rough-in
5. framing
6. insulation
7. drywall
8. final

Contractor specialties needed

general, electrical-01-or-02, plumbing, mechanical

Notes & caveats

2021 IRC R301 governs framing. WSEC R402.1 sets envelope requirements. New conditioned space requires Manual J HVAC sizing. Lateral load path continuity required for vertical additions. Most WA cities use a uniform fee bracket (UBC Table 1-A) for the building permit; plan review fee is typically 65% of building permit fee.

Addition permit fee — Washington baseline, not City of Redmond's own schedule

Worked example for a $120,000 home addition project (building permit). Your actual fee scales with project valuation.

Plan-review fee scales with valuation per UBC Table 1-A. State surcharge $6.50 per building permit. Trade permits (E/P/M) separate. Apply via https://eplans.redmond.gov. We have not read City of Redmond's adopted fee schedule, so this is not City of Redmond's fee: it walks the standard valuation table most Washington cities adopt by reference, as a rough guide. The real numbers are in City of Redmond's fee schedule ↗. Impact/utility fees may apply separately.