The short answer
Window replacement is priced per opening, and four choices set the price of each one: the type of window, the frame material, the glass package, and whether the installer fits the new unit into the old frame or replaces the frame as well. A whole-house project is those per-window prices added up, with a small discount for volume and extra charges for upper floors and damaged openings.
Published averages for 2026 cluster between $500 and $750 per window for ordinary vinyl replacements, while manufacturer price guides for premium lines run $800 to $2,200. Both are right. They describe different products and installation methods, which is why two quotes for the same house can differ by a factor of two. The calculator above separates the choices so you can see which one a quote is charging for.
How the calculator works
- Base price per window. Each window type has a low, typical, and high installed cost for a standard-size vinyl unit with double-pane low-E glass, fitted as an insert replacement.
- Frame and glass. The base price is multiplied by a frame factor (aluminum 0.95, vinyl 1.0, fiberglass 1.3, composite 1.35, wood 1.6) and a glass factor (double-pane 1.0, triple-pane 1.15, impact-rated 1.4).
- Height and location. Two-story houses add 5% and three-story houses 10%. The local cost level multiplies by 0.9, 1.0, or 1.2.
- Installation method and repairs. Full-frame installation, repair of rotted openings, and lead-safe work practices are added per opening. A permit is a flat amount.
The formula is: total = sum of (count × base price × frame factor × glass factor × height factor × local factor) + per-opening additions + permit.
Cost assumptions
Installed cost per standard-size window, vinyl frame, double-pane low-E glass, insert replacement, national baseline. These are planning ranges compiled from published 2026 window cost guides and homeowner surveys, not quotes.
| Window type | Low | Typical | High |
|---|---|---|---|
| Double-hung or single-hung | $400 | $700 | $1,100 |
| Sliding | $400 | $700 | $1,150 |
| Casement or awning | $500 | $850 | $1,300 |
| Picture or fixed | $400 | $750 | $1,400 |
| Bay or bow | $1,800 | $3,200 | $5,500 |
| Addition | Unit | Low | Typical | High |
|---|---|---|---|---|
| Full-frame installation | Per opening | $250 | $400 | $700 |
| Frame and sill repair | Per damaged opening | $200 | $400 | $800 |
| Lead-safe work practices | Per opening | $40 | $75 | $150 |
| Permit | Flat | $100 | $250 | $600 |
Six projects, priced
One-story house, national baseline, no damaged openings.
| Project | Low | Typical | High |
|---|---|---|---|
| 10 double-hung, vinyl, insert | $4,000 | $7,000 | $11,000 |
| 10 double-hung, fiberglass, insert | $5,200 | $9,100 | $14,300 |
| 10 double-hung, vinyl, full-frame | $6,500 | $11,000 | $18,000 |
| 10 double-hung, vinyl, impact-rated glass, insert | $5,600 | $9,800 | $15,400 |
| 10 double-hung, wood, full-frame | $8,900 | $15,200 | $24,600 |
| Whole house: 16 double-hung, 2 casement, 1 picture, 1 bay, vinyl, insert | $9,600 | $16,900 | $27,100 |
Insert or full-frame?
This is the choice that most often explains a large gap between two quotes.
An insert replacement, also called a pocket replacement, leaves the old frame, sill, and trim in place. The installer removes the sashes, fits a complete new window into the opening, shims and fastens it, insulates the gap, and caulks. It usually takes under an hour per window and does not disturb siding or interior finishes. The cost is a slightly smaller glass area, and the result is only as good as the frame it sits in.
A full-frame replacement removes the whole window down to the rough framing. The installer can then see and repair water damage, insulate the cavity around the opening properly, and install new flashing that ties into the wall's weather barrier. New interior casing and exterior trim are part of the job. Choose it when:
- The sill or frame is soft, stained, or visibly rotted.
- There are signs of leaks around the window, inside or out.
- The existing frames are aluminum or badly out of square.
- You are replacing siding at the same time, which makes correct flashing easy.
- You want to change the size or style of the opening.
Frame materials compared
| Frame | Relative cost | Typical life | What to know |
|---|---|---|---|
| Vinyl | 1.0× | 20 to 30 years | Lowest cost, no painting, good insulation. Limited colors; quality varies widely between lines. |
| Aluminum | 0.95× | 20 to 30 years | Strong and slim, common in warm climates. Conducts heat unless it has a thermal break. |
| Fiberglass | 1.3× | 30 to 40 years or more | Stable in heat and cold, paintable, narrow frames. Fewer manufacturers. |
| Composite | 1.35× | 30 to 40 years or more | Wood fiber and polymer blends. Looks closer to wood with little upkeep. |
| Wood or clad wood | 1.6× | 30 years or more with upkeep | The traditional look, often required in historic districts. Exterior cladding reduces painting. |
Glass and the ratings on the label
Every new window carries a National Fenestration Rating Council label. Three numbers on it matter most.
- U-factor measures how readily heat passes through the whole window. Lower is better. It is the number to watch in cold climates.
- Solar heat gain coefficient (SHGC) is the share of the sun's heat that gets through. Lower is better in hot climates. In cold climates a higher value on south-facing glass can reduce heating bills.
- Air leakage measures drafts through the assembled unit. Lower is better everywhere.
Double-pane glass with a low-emissivity coating and argon fill is the current standard and meets ENERGY STAR criteria in much of the country. Triple-pane glass is worth pricing in cold climates and near busy roads, since it also cuts noise. Impact-rated glass is laminated to resist windborne debris and is required by code in parts of Florida and other hurricane-prone coastal areas. ENERGY STAR requirements differ by climate zone, so a window certified for one region may not qualify in another.
Will new windows pay for themselves?
The U.S. Department of Energy attributes 25% to 30% of residential heating and cooling energy use to heat gained and lost through windows, so the potential is real. The actual savings are smaller than the sales pitch suggests. ENERGY STAR has estimated that replacing single-pane windows throughout a typical house saves on the order of $100 to $600 a year, or up to about 13% of energy bills, depending on climate. Replacing existing double-pane windows saves less.
Set that against the cost. A $16,900 whole-house project saving $400 a year takes more than 40 years to pay back on energy alone, which is longer than many windows last. The honest case for new windows rests on other things: rooms that are no longer drafty or too hot, windows that open, lock, and clean easily, less outside noise, no more rot or fogged glass, and a house that shows better to buyers. If energy cost is your only goal, air sealing and attic insulation almost always return more per dollar. Our guide to energy efficiency upgrades and their return ranks the options.
Tax credits and rebates in 2026
The federal energy efficient home improvement credit, which paid 30% of the product cost of qualifying windows up to $600 a year, is not available for windows placed in service after December 31, 2025. Windows installed during 2025 are claimed on that year's return with Form 5695. What remains is local: some utilities and state energy programs offer per-window rebates for high-performance units. Ask each bidder which rebates apply and confirm on your utility's website. The calculator does not subtract incentives.
Repair or replace?
Not every window problem calls for a new window. Consider repair first when:
- The frame is sound and the problem is a broken sash cord, balance, lock, or crank.
- The glass seal has failed in a few units. The insulated glass can often be replaced without replacing the window.
- Drafts come from worn weatherstripping or missing caulk.
- The windows are original wood sashes in an older house. They can usually be restored, and adding storm windows closes much of the efficiency gap at a fraction of the cost.
Replacement makes sense when:
- Frames or sills are rotted, or water is getting into the wall.
- The windows are single-pane metal units with no thermal break.
- Sashes will not stay open, will not lock, or are painted shut throughout the house.
- Glass is fogged in most units, which means the seals are failing by age.
- You need tempered, impact-rated, or egress-compliant windows that the existing units cannot provide.
Rules that affect the job
- Lead paint. In homes built before 1978, federal rules require contractors who disturb painted surfaces to be certified and to follow lead-safe work practices. Window replacement is squarely covered. Ask to see the firm's certification.
- Emergency escape. Bedroom windows must provide a minimum clear opening for escape. An insert replacement reduces the opening slightly, which can matter in a small bedroom window.
- Safety glass. Building codes require tempered glass in certain locations, including next to doors, near the floor, and beside tubs and showers.
- Historic districts and homeowner associations may restrict frame materials, grille patterns, and exterior colors.
How to compare window quotes
Window sales are known for inflated list prices followed by a steep discount that expires when the salesperson leaves. A fair price does not need a deadline. Get at least three written quotes and check that each one states:
- The manufacturer, product line, and frame material, not just a brand name.
- The glass package and the U-factor and SHGC from the rating label.
- Insert or full-frame installation, for every opening.
- What happens if rot is found: a price per opening, agreed in advance.
- Interior and exterior trim, caulking, insulation around the frame, and disposal of the old windows.
- The product warranty and the installer's labor warranty, and whether either transfers to a buyer.
- Lead time, the installation schedule, and the payment terms.
Divide each total by the number of windows and compare it with the per-window figure in the calculator. For vetting the companies, see our guide to finding the right contractors.
Timeline
Replacement windows are made to order after the installer measures each opening. Expect several weeks between the order and delivery, longer for wood, custom shapes, and impact glass. Installation is quick by comparison. A crew typically completes 8 to 15 insert replacements in a day, and full-frame work takes two to three times as long per opening.
Do new windows add value?
In Zonda's 2025 Cost vs. Value Report, a vinyl window replacement project costing $22,073 added $16,657 to resale value, about 75%, and a wood window replacement costing $26,781 added $18,764, about 70%. The report prices a specific ten-window project with its own product and trim specification, so its cost per window is above the basic replacement ranges on this page. The renovation ROI calculator compares windows with 26 other projects.
Keep the paperwork
New windows are a capital improvement, so their cost adds to your home's basis and can reduce the taxable gain when you sell. The capital gains on home sale calculator shows what documented improvements are worth. Keep the contract and paid invoice, the order sheet listing each window's size and specification, the rating labels or a photo of them, and the warranty documents. Many window warranties can be transferred to the next owner once, if the paperwork is filed within a set period after the sale. After a large window project, also update your insurer, since it raises the cost to rebuild; the home insurance calculator checks your dwelling limit.
What the estimate leaves out
The calculator does not price new openings or enlarged openings, structural headers, skylights, patio and entry doors, egress window wells, custom shapes and oversized units, interior window treatments, exterior siding or stucco repair, or painting of new trim. It does not subtract rebates. Prices assume standard sizes. Treat the result as a range to test contractor quotes against.
Cost assumptions last reviewed November 2026. See our calculator methodology.