- Bay window installation usually costs $970 to $5,650, about $2,500 typical.
- A bay window unit installed in an existing opening, with labor.
What bay window installation costs
Most homeowners pay $970 to $5,650 for bay window installation, and $2,500 is a typical price. A bay window unit installed in an existing opening, with labor.
| Price | |
|---|---|
| Low end | $970 |
| Typical | $2,500 |
| High end | $5,650 |
Sources: Fixr, Bob Vila and Today's Homeowner, combined as shown below. Local wages shift the typical price from about $2,270 in Arkansas to $2,885 in Hawaii.
What drives the price
- Replacing or new. Swapping an old bay is the cheap end. Cutting a new bay into a flat wall means framing, a roof over the bay and new trim.
- Size. Wider bays cost more for glass and support.
- Frame material. Aluminum and vinyl are the budget frames. Wood and fiberglass cost more.
- Bow or bay. Bob Vila puts bow windows at $1,500 to $6,500 each for a replacement.
Bay window installation cost by size
| Size | Price | Source |
|---|---|---|
| 4 ft by 3 ft | $750 to $1,800 | Bob Vila |
| 6 ft by 3 ft | $850 to $2,800 | Bob Vila |
| 8 ft by 3 ft | $910 to $3,200 | Bob Vila |
| 10 ft by 3 ft | $850 to $3,850 | Bob Vila |
Bay window installation cost by state
These state figures are Koira estimates. The labor share of the national price, about 40%, moves with each state's median wage for construction and extraction workers; materials stay at the national price. Use them to sanity-check a bay window installation quote.
| State | Low | Typical | High |
|---|---|---|---|
| Alabama | $894 | $2,303 | $5,205 |
| Alaska | $1,075 | $2,770 | $6,260 |
| Arizona | $960 | $2,475 | $5,592 |
| Arkansas | $881 | $2,270 | $5,131 |
| California | $1,049 | $2,704 | $6,110 |
| Colorado | $981 | $2,528 | $5,712 |
| Connecticut | $1,049 | $2,703 | $6,109 |
| Delaware | $969 | $2,497 | $5,643 |
| District of Columbia | $1,039 | $2,677 | $6,051 |
| Florida | $904 | $2,329 | $5,263 |
| Georgia | $906 | $2,336 | $5,280 |
| Hawaii | $1,119 | $2,885 | $6,519 |
| Idaho | $948 | $2,443 | $5,521 |
| Illinois | $1,107 | $2,853 | $6,448 |
| Indiana | $985 | $2,539 | $5,738 |
| Iowa | $969 | $2,499 | $5,647 |
| Kansas | $940 | $2,423 | $5,476 |
| Kentucky | $928 | $2,392 | $5,407 |
| Louisiana | $907 | $2,339 | $5,285 |
| Maine | $975 | $2,513 | $5,679 |
| Maryland | $972 | $2,506 | $5,663 |
| Massachusetts | $1,087 | $2,801 | $6,330 |
| Michigan | $981 | $2,528 | $5,712 |
| Minnesota | $1,055 | $2,719 | $6,145 |
| Mississippi | $887 | $2,286 | $5,166 |
| Missouri | $984 | $2,537 | $5,733 |
| Montana | $979 | $2,524 | $5,704 |
| Nebraska | $932 | $2,403 | $5,431 |
| Nevada | $984 | $2,537 | $5,733 |
| New Hampshire | $974 | $2,509 | $5,671 |
| New Jersey | $1,061 | $2,734 | $6,178 |
| New Mexico | $907 | $2,338 | $5,284 |
| New York | $1,041 | $2,682 | $6,062 |
| North Carolina | $904 | $2,330 | $5,265 |
| North Dakota | $981 | $2,527 | $5,712 |
| Ohio | $987 | $2,544 | $5,749 |
| Oklahoma | $899 | $2,317 | $5,236 |
| Oregon | $1,013 | $2,610 | $5,899 |
| Pennsylvania | $976 | $2,516 | $5,687 |
| Rhode Island | $993 | $2,559 | $5,783 |
| South Carolina | $905 | $2,332 | $5,271 |
| South Dakota | $909 | $2,342 | $5,292 |
| Tennessee | $911 | $2,348 | $5,307 |
| Texas | $902 | $2,326 | $5,256 |
| Utah | $954 | $2,460 | $5,559 |
| Vermont | $971 | $2,503 | $5,657 |
| Virginia | $950 | $2,448 | $5,532 |
| Washington | $1,074 | $2,768 | $6,255 |
| West Virginia | $957 | $2,468 | $5,577 |
| Wisconsin | $997 | $2,569 | $5,806 |
| Wyoming | $971 | $2,503 | $5,658 |
Cities inside a state can run well above or below the state figure.
How we got these numbers
| Guide | Range | Average | Use |
|---|---|---|---|
| Fixr | $972 to $5,672 | $3,322 | Counted |
| Bob Vila | $950 to $7,500 | $2,500 | Counted |
| Today's Homeowner | $1,800 to $2,000 | Not given | Counted |
We take the middle of the guides' lows for the low end, the middle of their highs for the high end, and the middle of their averages for the typical bay window installation price. Where a guide gives no average we use its midpoint. All read on October 9, 2026.
Labor share used: 40%. None of the guides splits labor out for this job, so this share is Koira's working assumption for windows work. State factor: the state's median hourly wage for construction and extraction workers over the national $28.63 (BLS, May 2025), kept between 0.7 and 1.4.
For contractors: price this job in Koira
Window quotes run window by window, so an estimate that lists each opening with its size and price is easy for a homeowner to approve.
Koira's free Office plan turns a bay window installation quote into a clean estimate the customer approves on their phone, then into an invoice they can pay. Price this job in Koira, free.
Sources: Fixr, bay window installation cost; Bob Vila, bay window installation cost; Today's Homeowner, bay window installation cost; BLS Occupational Employment and Wage Statistics, May 2025 (state and national files). Prices checked October 9, 2026. More for your trade: how the trade runs on Koira.