From £88,564
D.S Builders is a trusted extension builder serving customers in Southall and the surrounding area. Contact us to today to get a competitive quote ...
From £87,160
Southall, UB1
Experienced extension builder ready to quote for your work. Kairon Construction is the best extension builder in Southall. No obligation free quote...
From £88,672
Need an Extension Builder in Southall? House Builders London has been helping local clients (10 mile radius) with their extension buildering jobs f...
From £88,396
Southall, UB1
Need an Extension Builder in Southall? S.K Singh has been helping local clients (10 mile radius) with their extension buildering jobs for many year...
From £88,240
Trusted and professional extension builder in Southall. Experienced in all extension buildering work and keeping within budget and on quote. BAL CO...
From £88,612
Southall, UB1
Need an Extension Builder in Southall? Marz Building Maintenance has been helping local clients (10 mile radius) with their extension buildering jo...
From £88,012
Relax... you have found a reliable extension builder in Southall. Randhawa Design & Build Ltd is a friendly and reliable company based in Southall ...
From £88,396
Southall, UB1
United Design & Build Ltd is an established extension buildering business in Southall. We come highly recommended and provide competitive quotes fo...
From £88,612
Relax... you have found a reliable extension builder in Southall. RAJ BUILDING CONTRACTORS LTD is a friendly and reliable company based in Southall...
From £88,240
F&S BUILDERS LTD is an established and experienced local extension builder in Southall. Please contact us for a free, no obligation quote and compe...

Costs range from £87,160 (Kairon Construction based in UB1) to £88,672 (House Builders London based in UB1), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,694

Two storey extension - £88,290

Build a timber frame extension - £26,194

Build a swimming pool - £81,194

Single storey extension - £58,872

Side return extension - £43,678

Install an RSJ - £2,394

Outbuilding - £10,194

Build a Mansard loft conversion - £52,194

Loft conversion - £35,565

Build a kitchen extension - £42,194

Hip to gable loft conversion - £42,194

Granny annexe - £87,194

Garden office - £10,194

Convert a Garage - £16,194

Garage - £18,694

Build a flat roof extension - £22,194

Build a dormer loft conversion - £42,194

Concrete foundations - £6,444

Convert a bungalow loft - £29,194

Convert a basement - £39,678