WINDOWS
Bay Window Cost: In 2026
Estimate bay window installation cost — with the free window calculator.
A bay window adds light, space and charm — and it's the most complex window install there is. Here's the real 2026 cost.
THE SHORT ANSWER
The short answer
Bay windows run $2,500–$3,600 installed in 2026 (average). Small replacements run $1,000–$1,215. The unit runs $1,000–$2,500; installation $1,000–$1,500. Full bay with bench and trim runs $3,000–$5,000.
What it costs
A standard bay window runs $2,500–$3,600 installed. Small replacements run $1,000–$1,215. The unit runs $1,000–$2,500; installation and framing $1,000–$1,500. A full bay with a bench seat and interior trim runs $3,000–$5,000. New openings cost more than replacements.
- Standard installed: $2,500–$3,600
- Small replacement: $1,000–$1,215
- Unit: $1,000–$2,500
- With bench/trim: $3,000–$5,000
Bay vs bow windows
Bay windows have three panels — a flat center with two angled sides, usually with a bench. Bow windows have four or more panels in a gentle curve — more glass, more light. Bows cost more per unit but both run similar installed totals.
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