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 Great Britain?

Building a granny annexe ranges from £86,440 (D H Evans based in DL8) to £86,624 (Yorkshire Lime & Clay based in HG3), 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 Great Britain by posting a job with HaMuch. We will send it to extension builders in Great Britain who will be happy to help you.