Casement Windows in Westminster
From £350
| Service | Typical price in Westminster |
|---|---|
| Casement Windows | £438 - £1,125 |
| Sash Windows | £750 - £1,375 |
| Bay Windows | £1,500 - £4,000 |
| Door Installation | £1,063 - £2,250 |
| Window Repair | £111 - £313 |
Looking for casement windows in Westminster? Compare free, no-obligation quotes from vetted local installers in your area. Typical prices in Westminster sit around from £438 depending on unit count and specification.
Casement windows are the UK's default replacement choice - hinged on the side, opening outward, and available in uPVC, aluminium or timber. If your existing frames are pre-2005 or single-glazed, replacing them with A-rated casements typically pays back in energy savings within 8-12 years.
The single biggest price driver is glass area, not frame material - a 1200x1200mm casement costs roughly the same in uPVC or basic aluminium, but doubles for triple-glazed or thermally-broken aluminium. Standard installs use argon-filled double glazing with a warm-edge spacer; upgrading to triple glazing adds around 15% for a marginal thermal gain in most UK climates.
Popular specs for casement windows
Argon-filled A-rated double glazing, 28mm sealed unit, warm-edge spacer, low-E soft coat, multi-point locking, internally beaded, trickle vents (mandatory since June 2022).
Windows and doors in Westminster - local context
Georgian squares (Belgravia, Mayfair), Regency terraces around Pimlico and Marylebone, Edwardian mansion blocks in Marylebone and Bayswater, plus modern glass-fronted apartments around Victoria and Nine Elms.
Dominant era of housing stock: Georgian and Regency terraces, Edwardian mansion blocks.
Heritage note: Westminster has 55 conservation areas and thousands of listed buildings - almost any street-facing frame change needs council consent, and works in Belgravia or Mayfair require the tightest specifications.
- Mayfair
- Marylebone
- Belgravia
- Pimlico
- Victoria
- Paddington
- Soho
Postcodes we cover in Westminster
- SW1
- W1
- WC1
- WC2
- W2
- NW1
- NW8
Not seeing your postcode? Request a quote anyway - we likely still cover it.