23 double storey extension ideas to increase space

Brick double storey extension ideas
(Image credit: Billy Bolton)

Searching for double storey extension ideas can be a daunting task when faced with huge lists of mega-builds way out of your budget. 

Building an extension which spans two storeys can be cheaper than moving house in some areas and more budget-efficient than only building a single-storey addition, but where do you start?

Amy Reeves

Assistant Editor Amy began working for Homebuilding & Renovating in 2018. She has an interest in sustainable building methods and always has her eye on the latest design ideas. Amy has interviewed countless self builders, renovators and extenders about their experiences for Homebuilding & Renovating magazine. She is currently renovating a mid-century home, together with her partner, on a DIY basis, and has recently fitted her own kitchen.