Loft conversions advice guides

Which? expert advice on loft conversions - find out how much a loft conversion costs, which type of conversion and what planning permission you should get.

3 articles

How to plan a loft conversion

Our complete guide to loft conversions explains everything from checking if your home is suitable to design, permissions and finding an expert

1 October 2025

How much does a loft conversion cost in 2025?

Our guide provides a breakdown of costs for loft conversions, including structural and internal work, based on estimates from the Building Cost Information Service (BCIS)

3 December 2025

Loft conversion planning permission and building regulations

From permitted development to party wall agreements, here's what you need to know before converting your loft

20 December 2024