What the inspector is looking for
By final building inspection, the inspector has already seen the foundation, framing, and rough work. The final is the comprehensive walk-through:
- Life-safety systems — smoke and CO detectors functional and interconnected.
- Egress — bedroom egress windows operable, hallway widths, stair geometry.
- Guards and railings — height, spacing, structural attachment.
- Final exterior — flashing, weather-resistive barrier visible, deck connections, exterior stairs.
- Final interior — door swing clearances, GFCI in wet locations, AFCI in bedrooms.
- Energy compliance — confirmation that the air-leakage and duct-test results are filed.
- Documentation — the asbestos clearance, lead RRP records, structural engineer's letter, energy consultant's report all in the project file.
Certificate of Occupancy
Once the final passes, SDCI issues the Certificate of Occupancy. Save it in the home record permanently — title companies, future buyers, and your insurance company will all want to see it eventually.
What if the final fails
Common reasons:
- A missing fire extinguisher in a required location.
- A smoke detector test that didn't pass.
- An egress window that doesn't fully open.
- A handrail spacing or termination that's off by an inch.
Each is a same-day fix. The GC fixes, calls for re-inspection, passes. Three to seven days of delay, not weeks.
When this is done
When the CofO is issued and in your hands. The legal phase of the project is closed.
Where this information came from
- SDCI — Construction Permit: Addition or Alteration · retrieved April 25, 2026
- SDCI Tip 314 — Substantial Alteration of Existing Buildings · retrieved April 25, 2026
- SDCI Tip 100 — Building Permit Application Submittal Requirements · retrieved April 25, 2026
- Seattle Energy Code (alteration provisions) · retrieved April 25, 2026
- L&I — Verify a Contractor · retrieved April 25, 2026
- EPA — Renovation, Repair and Painting (RRP) Rule · retrieved April 25, 2026
- WA Department of Labor & Industries — Asbestos in Construction (WAC 296-62-077) · retrieved April 25, 2026