Hi there --

We plan to replace existing tiny windows (approx. 10x20) in a shed dormer with much larger casement windows (approx. 40x20). A contractor has quoted $550 per window (not including the windows themselves) to:

* Cut the new opening

* Do all reframing, repair/finishing of interior and exterior trim, drywall, etc.

The price doesn't include painting the window, which I said I would do myself.

They have a good reputation, so if this is a decent quote I'm happy to go with them, but I really don't have any experience with window installation.

Any thoughts?