New Construction Window Installation Costs | Find Pricing Details

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New Construction Window Installation Costs

New construction window installation cost usually run from $250 to $550 per opening. Find pricing details below - for general project costs, refer to our replacement window estimator.

Price Range: $250 to $550 per opening

New Construction Installation

New construction is sometimes used interchangeably with full frame replacement, although there are some important differences. New construction windows comes with a nailing flange which insures that the window is secure strongly inside the rough opening. New construction should include exterior flashing over the housewrap placed around the head and sides of the frame to insure that no water or moisture gets underneath.

A professional contractor should also include a waterproof sill pan installed on the bottom of the opening, which is an added protection should water or any moisture get in (which it shouldn't). The sill pan insures that water drains out of the exterior of the sill without causing any damage to the bottom sill or jamb.

Final Steps

From here, the window must be properly leveled, caulked and sealed, along with any trim or casing added to the exterior of the window frame. The exterior layer of cladding will then be added around the windows (although this is outside the scope of the article here). Popular cladding include stucco, wood and vinyl siding.

New Window Installation Costs And Issues

Hi Dane! HELP! I'm still out here floundering.
The installer we settled on now mentions two things that threw me for a loop:

His price does not hold in the event of 'unforeseen conditions'.
He's planning to use existing stops and casings.

On #1: No one else made this stipulation. On the contrary, the only other one who even talked 'unforeseen conditions' only did so to volunteer that their quote (which is higher) includes "whatever we have to do to install the windows", specifically saying they won't come back and jam us for more money after they've got our windows pulled out (and me over a barrel). I assumed all these guys were competent to correctly estimate what the issues might be and quote to include those issues -- full-stop. Is that an unreasonable expectation, or is this low-price guy trying to hose me?

On #2: This has made me realize how complex windows are. I'm lost. Many places online they seem to use different definitions of the same terms to describe the parts of a window. In any case, I assumed buying a new window meant getting everything new -- especially everything that's integral to its fit and mechanical operation (i.e. going up and down smoothly; preventing drafts; etc). Again: is my expectation unreasonable, or is this low-price guy trying to hose me?

Joe - Homeowner - from 2020

[Site Editor's Answer]

Both of these aren’t that unheard of — if he gets in there and you have lots of wood rot, that can be expensive to fix. Using existing stops and casings is normal.

I think overall the more important thing is to go with an installer/company that has really good reviews and a good online reputation. You don’t get this by screwing over your customers. This is the best way I know how to insure that the work done is going to be professional and fair price-wise.

Tim - Site Editor - from 2020