From £88,156
Starling Constructions Ltd is an established and experienced local extension builder in Chiswick. Please contact us for a free, no obligation quote...
From £88,000
Chiswick Greater London, W4
Design, Project Manage & Build bespoke homes for clients
From £88,732
Kuta Design and Build Limited is an established and experienced local extension builder in Chiswick. Please contact us for a free, no obligation qu...
From £88,456
Londonderry, W4
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £88,036
Relax... you have found a reliable extension builder in Chiswick. Elite London Construction is a friendly and reliable company based in Chiswick wh...
From £88,228
Greater London, W4
Good Design and Build are here to help customers who need an Extension Builder in Chiswick. We offer a competitive rate to complete all your extens...
From £88,324
Guardian Developments is a west London based design and build company, specialising in residential projects including extensions, refurbishments a...
From £88,120
Greater London, W4
Relax... you have found a reliable extension builder in Chiswick. Zulufish is a friendly and reliable company based in Chiswick who consider no job...
From £88,504
Smart Property Sourcing is a trusted extension builder serving customers in Chiswick and the surrounding area. Contact us to today to get a competi...
From £88,096
Greater London, W4
Pipedreams Interiors Ltd are here to help customers who need an Extension Builder in Chiswick. We offer a competitive rate to complete all your ext...

Costs range from £88,000 (SxS Design & Build based in W4) to £88,732 (Kuta Design and Build Limited based in W4), 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 - £17,677

Two storey extension - £88,265

Build a timber frame extension - £26,177

Build a swimming pool - £81,177

Single storey extension - £58,536

Side return extension - £43,489

Install an RSJ - £2,377

Outbuilding - £10,177

Build a Mansard loft conversion - £52,177

Loft conversion - £35,408

Build a kitchen extension - £42,177

Hip to gable loft conversion - £42,177

Granny annexe - £87,177

Garden office - £10,177

Convert a Garage - £16,177

Garage - £18,677

Build a flat roof extension - £22,177

Build a dormer loft conversion - £42,177

Concrete foundations - £6,427

Convert a bungalow loft - £29,177

Convert a basement - £39,489