Bay windows project outward from the exterior wall, creating a small alcove inside the room. They typically consist of three panels: a large center window flanked by two angled side windows (usually at 30 or 45 degrees). Bay windows add architectural interest, increase natural light, expand interior space, and boost curb appeal significantly.
Get Free EstimatesPer-window pricing including installation (2026)
Low
$1200
Average
$2200
High
$3500
Average Cost
$2200
Lifespan
20-30 years
Maintenance
Medium — roof and seal maintenance required
Energy Rating
ENERGY STAR options available; triple-pane recommended
Common questions about bay windows replacement
Bay window replacement costs $1,200 to $3,500 per unit installed, with the average at $2,200. New bay window installation (where no bay existed) costs $3,000-$6,000+ due to structural modifications required.
Get free, no-obligation estimates from verified contractors in your area.
Get Free Estimates