Window Replacement Costs in Cardiff
Cardiff window replacement costs in 2026 are broadly in line with Welsh averages. The city's mix of Victorian terraces, Edwardian semis, and post-war housing creates varied requirements.
| Window type | Cardiff typical cost (per window) |
|---|---|
| Standard casement uPVC | £400–£700 |
| Sash window (uPVC replacement) | £600–£1,100 |
| Bay window (3-section) | £900–£1,800 |
| Aluminium casement | £600–£1,100 |
| Full house (3-bed semi, uPVC) | £3,500–£6,500 |
FENSA certification: Reputable Cardiff window fitters are FENSA-registered, which means they can self-certify the installation to building control without requiring a separate building control application. Always ask if the installer is FENSA registered.
Conservation Area Windows in Cardiff
Cardiff has several significant conservation areas including Pontcanna, Llandaff, Roath (parts), Canton (parts), and Cardiff Bay. In these areas:
- uPVC windows may not be permitted, timber or aluminium in sympathetic styles is typically required
- Replace like-for-like in style and material where possible
- Always consult Cardiff Council's planning team before ordering
Approved suppliers experienced with Cardiff's conservation requirements can advise on compliant window specifications that don't require a planning application.