How Much Does Window Replacement Cost in Seattle?

Window replacement in Seattle typically runs $500–$1,200 per window installed, depending on the material, size, and style. Vinyl double-hung windows — the most common choice — generally fall at the lower end of that range. Fiberglass windows, which hold up exceptionally well in the Pacific Northwest's damp climate, run $2,000–$5,000 per window but often outlast vinyl by decades.

A few factors that move the number up:

• Custom or non-standard sizing (bay, bow, or arched windows)
• Second-floor or difficult-access installations
• Wood rot or damaged framing discovered once the old unit is removed
• Full-frame replacement vs. insert (pocket) replacement

Seattle homeowners generally pay 15–30% above national averages due to higher regional labor rates and stricter energy-efficiency code requirements. For a whole-house project on a typical Seattle home (15–20 windows), budget $7,500–$18,000 for vinyl, or more for fiberglass or wood.