Two different jobs share one name
"Window replacement" can mean two different jobs, and the difference changes your price, your timeline, and what's exposed in your wall while the work happens.
An insert replacement, sometimes called a pocket replacement, sets a new window unit inside the existing frame. The old sashes come out, the new unit goes into the opening the old frame already made, and the exterior trim and siding around it are left alone. That's why it installs faster and disturbs less of the house.[1]
A full-frame replacement takes the window down to the rough opening: head, side jambs and sill all come out. The deeper teardown is what lets a contractor deal with a problem hiding behind the old frame instead of building around it.[1]
What each one costs
Cost guides price these two jobs differently because they involve different amounts of work. One widely used estimate puts insert replacement at $100 to $400 per window and full-frame at $180 to $1,500 per window, with the gap coming mostly from the extra labor, trim carpentry and finish work a full teardown requires.[1]
Fixr's 2026 window data shows a national per-window range of $450 to $1,200 that mixes both methods together; the projects at the top of that range tend to be full-frame jobs on larger or oddly shaped openings.[2]
HomeAdvisor's per-window averages, updated in June 2026, run from $450 for aluminum to $1,250 for wood, again spanning both replacement methods depending on the material and the condition of the existing frame.[3]
When an insert is the right call
An insert makes sense when the existing frame is still square, level and clear of rot or water damage, and when you're keeping the same size and style of window.[1]
If that describes your opening, there's rarely a reason to pay for a full teardown. Ask a contractor to check the frame with a level and a moisture meter before quoting either method. That five-minute check is what separates an honest insert recommendation from an upsell you don't need.
When full-frame earns its higher price
Full-frame is worth it when the frame itself is the problem: rot, warping, a settled opening that's out of square, or water damage that's been getting into the wall for years.
Full-frame is also the only option if you want to change a window's size, style or configuration, since an insert has to fit inside the opening the old frame already defined.[1]
If a bedroom needs a larger egress opening, that's a full-frame job by definition, because you're changing the rough opening itself, not just what sits inside it.
Why the flashing question matters more on a full-frame job
Pulling a window down to the rough opening exposes the sheathing and the weather-resistant barrier underneath, which is exactly where a rushed flashing job turns into a leak you won't see for a year. An insert replacement skips most of that exposure; a full-frame job lives or dies by it.
What to ask before you agree to either one
Get the recommendation and the reason for it in writing. If a contractor proposes full-frame on a window that's still square and undamaged, ask directly why an insert wouldn't do the same job for less. If a contractor proposes an insert on a window with visible rot at the sill, ask what happens to that rot once it's sealed behind new trim. A straight answer to either question should stand on its own, not just point back at the price.