Mansard loft conversions are ideal if you want to maximise the space in your home. Extending your roof out into a flat roof with an almost vertical wall, they almost always require planning permission but can add significant value to your home.

Mansard loft conversions range from the cheapest installation of £51,440 (Gemini Building Services based in L20) to the dearest of around £56,400 (G R T building&roofing based in L13).

While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.

Get quotes to install a mansard loft conversion in L4 by posting a job with HaMuch and we'll send it to extension builders in L4.