Bear in mind that a two-storey extension brings design challenges. ‘Absolutely any extension is going to change the look of your house,’ says architect Melanie Clear, founder of Clear Architects.

“Junctions between the eaves or roof of the main house and new extension often need more consideration, too.” If your ultimate goal is to build a two-storey extension but you don’t have the ...

In those cases, loft extensions may provide the space you need for an extra bedroom or two. If you live in a detached or semi-detached house, a two storey side extension may be possible. A classic ...