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
Acorn Building Contracts Ltd
Totton
Builder5.01 review
Hedge End Builders
Hedge End North, Eastleigh
Builder5.07 reviews
Morris & Blunt Construction Ltd
Park, Reading
Builder4.625 reviews
JP Harris Developments Ltd
Woodley
Builder5.03 reviews
Worthy Builders Reading Ltd
Bramley, Basingstoke
Builder5.02 reviews
A Beech Builders - Portsmouth - Checkatrade
Portsmouth
Builder5.066 reviews
Hampshire Building Projects
Copnor, Portsmouth
Builder5.020 reviews
kp builders Portsmouth
Eastney and Craneswater, Portsmouth
Builder4.714 reviews
Clameg Design & Build Ltd
Copnor, Portsmouth
Builder5.020 reviews
JBT Renovations
St Jude, Portsmouth
Builder5.012 reviews
A Purkiss Building & Maintenance Contractors Ltd
Hilsea, Portsmouth
Builder
Morspace Construction Ltd
Cosham, Portsmouth
Builder5.06 reviews
N J Builders Ltd
Purbrook, Waterlooville
Builder
Travis Perkins
Copnor, Portsmouth
Builder
Profectus Construction Ltd
Wimborne Minster
Builder5.018 reviews
Surrey Developments
Walton South, Walton-on-Thames
Builder4.822 reviews
TN Design & Build
Walton South, Walton-on-Thames
Builder5.029 reviews
Masterpiece Construction Ltd
Walton North, Walton-on-Thames
Builder5.011 reviews
Mayfair Build Ltd
Walton South, Walton-on-Thames
Builder5.089 reviews
MAG Construction Ltd
Hersham Village, Walton-on-Thames
Builder4.820 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.