A granny annexe is the ideal solution for offering a young family member their own space in your home while they save up for their own house, or to help an older relative have some independence while keeping them at a safe distance. But how much do they cost to build in B20?

Building a granny annexe ranges from £86,528 (D&J Advanced Builders based in B44) to £87,800 (Sperin Interiors based in B66), but these are just estimates that can help give you an idea of who will be better value in your area.

The best thing to do is to get quotes to build a granny annexe in B20 by posting a job with HaMuch. We will send it to extension builders in B20 who will be happy to help you.