According to comparison website Checkatrade, simple, outward-opening double-glazed windows can cost from £360 to £680, depending on their size. A whole house of 12 windows might cost £5,000 to ...

Awning windows are hinged at the top and open outward, while hopper-style windows are hinged at the bottom and open inward. ... $310 per window; Vinyl double-hung: Simonton Pro-Finish Contractor ...