21 small house extension ideas that will make a big impact

small house extension ideas for terrace
(Image credit: Fraser Marr)

The best small house extension ideas don't just add new space, they can transform existing rooms and layouts too if a holistic approach is taken.

Savvy yet small house extension designs for porches, side-return additions and rear extensions can all lighten undue stress put on awkward floorplans. While reimagining existing spaces, such as lofts and garages, with a small extension can add space and value to any size of home. 

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.