Vinyl Bay Window Costs

Windows that are exterior facing must close against weather and intrusion. The Bay Window is a classic design that adds to interior space and comfort, and exterior appeal.

​You will find that the cost to install average vinyl bay windows depends upon size and dimensions, preparation and special needs, and the labor rate.

In the following table the Labor Cost figure is what the able and prepared DIY persons should expect to save by performing the corresponding tasks.

Vinyl bay window replacement: remove and dispose of existing window and replace with a vinyl bay window; include costs for miscellaneous material, equipment, and waste.

ItemUnit CostQuantityLine Cost
Vinyl window set: 90" wide x 54" tall; fixed center glass, 2 opening flankers; 7/8" insulating glass and 2 screens; all trim, sealing, hardware and the asphalt shingle bay-roof section.$1,743each1$1,743
Upgrade: additional cost to install copper roofing in place of standard asphalt shingles on bay-roof section; both options include wood framing of new roof section, insulation, hardware, and weatherproofing.$1,053each1$1,053
Material Cost$2,796each1$2,796
+ Labor Cost (standard)$38per hour8$304
+ Labor Cost (upgrade)$38per hour4$152
Total Cost$3,252each1$3,252

Other considerations and costs

  • These prices are for service in the immediate area of the provider.
  • Taxes and permit fees are not included.
  • The bay window extends to the exterior and could obstruct walkways.
  • During contractor inspection the homeowner should be informed of any repair concerns like rot, and the cost to adapt the existing structure.
  • A project to replace more than 2 windows should enjoy a unit price discount.

DIY considerations

  • This project is not highly suitable for DIY with precise carpentry and important closure deadline.
  • Partial DIY of removal and disposal tasks are possible for the prepared DIY.


  • Craftsman Estimator Costbook, complete series year 2015.
  • Latest prices found on Home Depot and other vendor Web sites.
  • Literature review of DIY Web sites.   

Cost to install vinyl bay windows in my city

Cost to install vinyl bay windows varies greatly by region. To get free estimates from local contractors, please indicate yours.