Extensions
Building a single or two-storey extension onto a house, from the foundations and shell to the point it opens into the existing rooms. Extensions are carried out by all 29 builders, with businesses concentrated in Portsmouth and Walton-on-Thames. The businesses have a median rating of 5.0 across 25 rated businesses, while ratings run from 4.1 to 5.0.
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Builders who do extensions
A.S.Ashcroft Ltd
Walton North, Walton-on-Thames
Builder4.19 reviews
Christie's Carpentry & Construction Ltd
Worplesdon, Wood Street Village
Builder4.416 reviews
Stallwood Building Services Ltd
Woking
Builder4.610 reviews
Thomas the Builder Ltd
Sunbury Common, Ashford
Builder5.06 reviews
Totus Construction Ltd
Walton North, Walton-on-Thames
Builder
Whitley Builders Ltd
Redhill East, Banstead
Builder5.010 reviews
Stonebarrow Home Improvements
Ferndown North, Ferndown
Builder5.0108 reviews
Heritage Home Improvements
West Moors
Builder5.017 reviews
JV Marston Builders
Ferndown South, Ferndown
Builder5.02 reviews
Worth knowing
- The work is also called house extension, single storey extension, rear extension and side return.
- 23 also offer renovation and refurbishment, 16 also offer loft conversion, and 5 also offer garage conversion.
- 3 also offer groundwork and foundations, while 1 also offers chimney work and 1 also offers structural repairs.
- The businesses have 408 reviews in total, and the most-reviewed business has 108 reviews.
- All 29 have their own website.
- The published price band is based on the national medians of the prices firms publish for 3 variants of this work across 12 UK towns, researched August 2026.