Cost to Replace Windows
The cost to replace windows is set by two decisions long before anyone names a brand. The first is the frame material. The second, and the larger of the two, is whether you are buying an insert replacement that drops into the existing frame or a full frame replacement that takes the opening back to the studs. Full frame work routinely runs close to double the insert route on the same house, and most homeowners have never heard the distinction before the first salesperson uses it.
That single ambiguity is why two quotes for "12 replacement windows" can look like they were written for different houses. They often were. One bidder is replacing sashes inside your existing jambs in an hour or two per opening. The other is stripping the opening, flashing it, setting a new unit, and rebuilding interior casing and exterior trim afterward.
Updated August 2026
A note on numbers. This page gives you the installation methods, frame comparisons, performance specs, code triggers and bid questions rather than dollar figures. Window pricing depends on your market, your access, your local labor rates and the exact unit a dealer stocks, so a printed per window range would mislead more readers than it helped. Use the comparisons here to write one identical scope, then take it to three local companies.
Sizing up a whole house job? Start with a written inventory of every opening. Our free square footage calculator helps you work through each elevation so that you can hand every contractor the same list and get bids that are genuinely comparable.
Cost to replace windows by window type
Window style changes both the unit price and the labor, and a few styles carry carpentry that has nothing to do with the window itself.
| Window type | Relative cost | Notes |
|---|---|---|
| Single hung | The cheapest operable window | Only the bottom sash moves. Common in builder grade homes and across the South. |
| Double hung | Modestly above single hung | Both sashes move and tilt in for cleaning. The default in most of the US and the most quoted window on this list. |
| Slider | Similar to a hung window | Sashes slide horizontally. Good for wide, short openings, with fewer moving parts than a hung window. |
| Casement | Above the hung and slider styles | Cranks open on a hinge and seals tightest of any operable window, because the sash pulls against the frame. Hardware is the failure point. |
| Awning | Between hung and casement | Hinged at the top, opens outward, can stay open in light rain. Common over kitchen sinks and in basements. |
| Picture, fixed | Cheapest per square foot of glass, and it climbs steeply with size | Does not open, so it is the tightest of all. Large units need two people and sometimes a lift. |
| Bay | Several times a standard double hung | Three units projecting from the wall. Needs a supported seat, a roof and flashing, so much of the price is carpentry rather than window. |
| Bow | The most expensive of the projecting styles | Four or five units in a gentle curve, with the same carpentry as a bay and more units. |
| Basement egress | Expensive out of proportion to the unit | The window is cheap. Cutting the foundation, digging and setting a window well and adding a ladder is what costs money. Almost always permitted work. |
| Garden window | Well above a standard unit | Projects out like a small greenhouse. Structural support and flashing drive the price, exactly as with a bay. |
Two notes on that table. Bay and bow figures assume the opening already supports one. Converting a flat wall into a bay adds a header, framing, a roof and siding work, which is a different project wearing a window's name. And an egress window in a bedroom or a finished basement is a code requirement rather than a style choice, which is covered further down.
Cost to replace windows by frame material
Frame material sets both the price and how long the window lasts. Here is the same standard double hung in each material.
| Frame material | Relative cost | Realistic lifespan | The tradeoff |
|---|---|---|---|
| Vinyl | The value choice, and the market benchmark | 20 to 30 years | Low maintenance and good thermal numbers. Expands and contracts more than other materials, color choice is limited because dark vinyl absorbs heat and can warp, and it cannot be repaired or repainted. |
| Aluminum, thermally broken | Slightly above vinyl | 30 to 40 years | Strong, slim sightlines, holds big glass. Aluminum conducts heat, so even with a thermal break it is the weakest cold climate performer. Sensible in mild and coastal markets, a poor pick in zones 5 and up. |
| Fiberglass | Well above vinyl | 40 to 50 years | Expands at nearly the same rate as glass, so the seals last. Stable, strong and paintable. Fewer local installers carry it. Often the best long run value if you are staying put. |
| Wood | High | 30 to 50 years with upkeep | The look, especially in older and historic homes, and the best insulator of the frame materials. Needs paint or stain on a cycle, and neglected wood windows rot at the sill first. |
| Aluminum clad wood | The most expensive mainstream option | 30 to 50 years | Wood inside, extruded aluminum outside. Solves maintenance on the weather side while keeping the interior look. The clad finish cannot easily be repaired if it is damaged. |
| Composite | Between vinyl and fiberglass | 30 to 40 years | Wood fiber and polymer blend, sitting between vinyl and fiberglass on both price and performance. Fewer brands, so comparison shopping is harder. |
Materials versus labor. On a straightforward insert replacement the window unit itself is roughly 55 to 70 percent of the price and the labor is a short, predictable visit per opening. On full frame work the labor plus the associated trim, flashing and finish work climbs until it approaches half the total. That shift in the ratio is the clearest sign of which method a bid is actually quoting.
Insert vs full frame replacement: the biggest cost driver
This is the part that explains why two bids on the same twelve windows are not in the same neighborhood.
Insert replacement, also called a pocket or retrofit replacement, leaves the existing window frame in the wall. The installer removes the sashes, the jamb liners and the hardware, then sets a new complete window unit inside the old frame and seals it. Exterior siding or brick and interior casing are never disturbed.
Full frame replacement removes everything down to the rough opening: sashes, jambs, sill and all. The installer inspects and repairs the framing, installs new flashing and a sill pan, sets the new window, then rebuilds interior casing and the exterior trim or siding return.
| Insert, pocket | Full frame | |
|---|---|---|
| Relative installed cost | The baseline | Roughly double per opening |
| Time per window | 1 to 2 hours | 3 to 6 hours |
| Interior trim disturbed | No | Yes, new casing needed |
| Exterior siding disturbed | No | Yes, patching or capping needed |
| New flashing and sill pan | No | Yes |
| Glass area | Shrinks 2 to 4 inches in each direction | Unchanged, or slightly larger |
| Fixes rot in the opening | No | Yes |
Use an insert when the existing frame is square, solid and dry. That describes most houses under about forty years old with no water history. It is faster, cheaper and cleaner, and it keeps original interior trim intact, which matters in an older house with millwork worth saving.
Use full frame when the existing frame is rotted, racked out of square, or there have been leaks below the window. Also when you are replacing the siding anyway, since the flashing details only get done properly with the siding off, when you are changing the size or style of the opening, or when the old windows are metal framed units in a wood wall, where the insert approach leaves a thermal problem permanently in place.
The glass area tradeoff is real. An insert eats 2 to 4 inches of visible glass in each direction, because the new frame sits inside the old one. On a large window nobody notices. On a small bathroom or basement window it is a real loss of light, and on a bedroom window it can push the clear opening below the minimum egress size, which turns a cosmetic issue into a code problem.
What makes a window quote go up
- Size. Pricing scales with united inches, meaning width plus height. A window a quarter larger than standard costs disproportionately more, because it crosses into a heavier glass package and a two person lift.
- Custom shapes. Almost all replacement windows are made to order, but arched, round top and trapezoid units carry a real premium each and lengthen lead times.
- Egress requirements. Bedrooms and finished basements need an egress window meeting a minimum clear opening and a maximum sill height. If your replacement drops the opening below that, the fix is enlarging the opening, which means framing, a header and a permit. In a foundation wall it means cutting concrete.
- Second story access. Ladder work, staging or a lift adds a meaningful percentage to the labor on upper floor windows. Anything above two stories or over a roofline adds more.
- Rot discovered at the opening. The most common change order in this trade. A good contractor writes a unit price for sill and framing repair into the contract up front, so you are not negotiating it on day two with the wall open.
- Historic district rules. In a designated district or on a register, the review board may require specific materials, muntin patterns or exterior profiles, and may reject vinyl outright. That changes both the product and the calendar. Check before you sign anything.
- Lead paint in pre 1978 homes. Assume lead until tested. Old window trim and sashes are among the highest risk lead sources in a house, because the friction surfaces grind paint into dust. Federal RRP rules require an EPA Lead Safe certified firm for this work in pre 1978 housing, and that certification is priced into the bid. Never dry sand or scrape old window paint yourself.
- Tempered glass. Required by code near doors, tubs, showers, stairs and within certain distances of the floor. It is a per sash upcharge.
- Grids, obscure glass and special coatings. Each is a per window upcharge, and simulated divided lites with exterior bars add the most.
- Local labor rates. The window units cost close to the same across the country. The installation does not, which is most of the reason the same twelve window job differs between a coastal metro and a rural county.
A written local quote is the authority. Get three, and make sure all three are bidding the same installation method, because insert versus full frame is where the confusion usually hides.
Are replacement windows worth it? The honest answer
Here is the part most window company math skips.
Replacement windows rarely pay for themselves in energy savings within the life of the window. The savings are real, and they are largest when you are replacing genuinely old single pane units with no storm windows. Even in that best case, the annual saving is small relative to a whole house job, so the simple payback lands beyond the expected service life of what you just installed.
If you are replacing existing double pane windows that still function, the energy case is weaker again, because you are improving on a starting point that was already reasonable. The gain is a fraction of the single pane case, and the payback is effectively theoretical.
The reason the marketing math looks better than this is that it almost always assumes you are starting from single pane originals, which is the most favorable possible baseline and describes a shrinking minority of houses. Read any savings claim and ask what the "before" window was. If the brochure does not say, assume single pane.
So what justifies the money? These, honestly:
- Comfort. No cold draft along the couch by the window, no radiant chill sitting near the glass in January. This is why most people are genuinely glad they did it.
- Noise. A modern double pane unit with good seals, especially one with laminated or unequal thickness glass, is a large improvement over a rattly old sash. On a busy street this alone can carry the decision.
- Condition. Rotted sills, sashes painted shut, broken balances, failed seals fogging the glass, windows that will not stay open. At some point repair stops being economic.
- Operation and safety. Windows that open easily matter for egress, and sashes that will not stay up are a hazard with small children.
- Selling. Window replacement recovers roughly 60 to 70 percent of its cost at resale, which is respectable for a remodeling project and still a loss. Do it because you are living there.
If your goal is genuinely lower energy bills for the money spent, attic insulation and air sealing beat window replacement by a wide margin. Our insulation calculator is the cheaper place to start, how to insulate an attic covers the work, and drafty windows fix covers what you can do to the windows you already own.
U factor and SHGC, explained simply
Every ENERGY STAR qualified window carries an NFRC label with these two numbers. They are the only spec sheet figures you actually need.
U factor measures how fast heat conducts through the whole window assembly, frame included. The range is roughly 0.15 to 1.20. Lower is better insulation. It is the inverse of R value, so U 0.25 is about R 4.
SHGC, the solar heat gain coefficient, measures how much of the sun's heat gets through, on a 0 to 1 scale. Lower means less solar heat comes in. An SHGC of 0.25 admits about a quarter of the available solar heat.
Here is the part that trips people up: the right SHGC is opposite in hot and cold climates.
| Climate | U factor target | SHGC target | Why |
|---|---|---|---|
| Hot, zones 1 to 3 | 0.30 or lower | 0.25 or lower | You are fighting the sun. Blocking solar gain cuts the cooling load, and low E coatings tuned for solar control do most of the work. |
| Mixed, zone 4 | 0.27 or lower | 0.25 to 0.40 | Both loads matter. Choose middle of the road glass, or specify by orientation. |
| Cold, zones 5 to 8 | 0.22 to 0.27 | 0.30 or higher is fine | Insulation is the priority. Free winter solar gain through south facing glass is a benefit, so do not over specify a low SHGC. |
Practical version: in the South, chase SHGC. In the North, chase U factor. A salesperson quoting one number without asking about your climate zone is selling rather than specifying. The NFRC label on the window carries the independently verified number, not the manufacturer's own claim.
Ignore anything quoted as an R value for a window without a matching U factor, and ignore center of glass numbers, which exclude the frame and always look better than the whole window rating you will actually live with. Our R value insulation chart explains how the two scales relate.
Can you replace windows yourself?
Insert replacement: yes, for a competent DIYer. Pull the stops and sashes, clean the opening, dry fit, shim square and plumb, fasten through the jambs, insulate the gap with low expansion window foam, since standard foam will bow the jambs and bind the sashes, then seal the exterior with a good sealant. Budget two to three hours for your first one and about an hour each after that. What you save is the installation labor line on every opening.
Full frame replacement: no, for most people. You are removing trim next to structure, you are responsible for the flashing and sill pan detail that keeps water out of the wall, and you are patching siding and rebuilding interior casing afterward. Getting the water management wrong does not show up for two years, and then it shows up as rot in the sheathing. This is contractor work in practice even where it is not by law.
Always hire out, and expect a permit: any window where you are changing the opening size, cutting a new opening, adding a basement egress window, or touching a header. Structural changes need a permit and an inspection in essentially every jurisdiction, and historic districts add a design review on top. See do I need a permit for how to check.
Two more hard stops. In a pre 1978 house, assume lead paint and use an EPA Lead Safe certified firm rather than sanding or scraping it yourself. In a pre 1990 house, if the work runs into old floor tile, pipe wrap or textured ceiling near the opening, do not sand or scrape any of it. Assume asbestos and have it tested.
Worked example: 12 windows on a two story house
A 2,100 square foot two story colonial built in 1988. Twelve windows: eight double hung upstairs, three double hung and one picture window downstairs. The existing units are original builder grade aluminum with failing seals. Frames are dry and square, with no water damage found at the sills.
The two competing scopes
| Scope item | Option A: insert | Option B: full frame |
|---|---|---|
| Units | 11 double hung plus 1 picture, sized to the existing jambs | 12 units sized to the rough openings, slightly larger glass |
| Removal | Sashes, liners and hardware only | Everything back to the framing |
| Flashing and sill pans | Existing, undisturbed | New at all twelve openings |
| Interior finish | Existing casing stays | New casing at twelve openings |
| Exterior finish | Existing siding stays | Trim, capping or siding patch at twelve openings |
| Access | Ladder or staging for eight upstairs openings | Same, for longer per opening |
| Rot allowance | Not applicable | Unit price for sill and framing repair, written in |
| Days on site | 2 to 3 | 5 to 8 |
| Relative total | The baseline | Close to double |
Which one is right here? The insert. The frames are dry and square, the house is not getting new siding, and the interior trim is fine. Full frame would buy new flashing this house does not currently need, at close to twice the price, and it would disturb trim that is doing its job.
Flip one fact and the answer flips. If the inspection had found soft sills on three upstairs windows and the siding was already scheduled for replacement next spring, full frame becomes the right call, and you would schedule the windows to go in with the siding so that the flashing integrates properly with the new weather barrier. Our siding cost page covers what that combined job looks like.
On the energy question for this house: these are failed seal aluminum double panes, not single pane originals, so the energy improvement is the small version rather than the large one. The reason to do the job is that the seals are fogged, the sashes stick, and the second floor is cold along the north wall in January. Those are good reasons. Energy savings is a bonus here, not the business case.
Frequently asked questions
What should it cost to replace one window?
That depends on the style, the frame material, the access and your local labor rates, which is why we do not publish a per window figure. What is consistent everywhere is the shape of the pricing: a single window job carries a minimum trip charge, so replacing one window always costs more per window than replacing ten at once. If you have several failing units, doing them together is the cheapest path per opening.
Is it cheaper to replace all windows at once?
Yes, meaningfully. Contractors price per window labor lower on volume, you pay one mobilization and one disposal charge, and manufacturers discount larger orders. Doing the job in two phases is still perfectly reasonable if that is what the budget allows, but expect the per window number to be higher in each phase than it would have been in one visit.
What is the difference between replacement windows and new construction windows?
New construction windows have a nailing fin that fastens to the exterior sheathing, so they require the siding to be open. Replacement windows have no fin and install into an existing opening. If a contractor proposes new construction windows, they are describing a full frame job with siding removal, and the quote and the schedule should both reflect that.
How long do replacement windows last?
Vinyl runs 20 to 30 years, aluminum and composite 30 to 40, wood and clad wood 30 to 50 with maintenance, and fiberglass 40 to 50. The insulated glass seal usually fails before the frame does, commonly at 15 to 25 years, which is what causes the fogged look between the panes and what most people are actually replacing.
Do new windows lower my energy bills?
Somewhat, but less than the marketing implies. The improvement is largest when you are replacing true single pane windows and much smaller when you are replacing functioning double panes. In neither case does the job pay for itself inside the lifespan of the window, so buy them for comfort, noise and condition, and treat the energy gain as a bonus.
Should I get insert or full frame replacement?
Insert if the existing frame is square, solid and dry, which covers most houses. Full frame if there is rot, the frame is out of square, you are replacing siding anyway, or you are changing the opening size. Full frame costs roughly double per opening, so it needs a reason beyond a salesperson preferring it.
What U factor should I look for?
In cold climates, 0.22 to 0.27 or lower, and do not worry about a higher SHGC, since winter solar gain helps you there. In hot climates, prioritize an SHGC of 0.25 or lower and accept a U factor around 0.30. Use the whole window NFRC number printed on the label rather than the center of glass figure, which excludes the frame.
Do I need a permit to replace windows?
Usually not for a like for like replacement in an existing opening, though rules vary and some jurisdictions require one regardless. You definitely need a permit if you are changing the opening size, cutting a new opening, adding a basement egress window, or altering a header. Historic districts add a separate design review on top of the permit.
Related: Square footage calculator | Insulation calculator | Siding calculator | Siding cost | Cost to paint a house exterior
Energy performance criteria: ENERGY STAR residential windows.
