From £6,354
Starling Constructions Ltd is an established and experienced local extension builder in Chiswick. Please contact us for a free, no obligation quote...
From £6,250
Chiswick Greater London, W4
Design, Project Manage & Build bespoke homes for clients
From £6,738
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 £6,554
Londonderry, W4
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,274
Relax... you have found a reliable extension builder in Chiswick. Elite London Construction is a friendly and reliable company based in Chiswick wh...
From £6,402
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 £6,466
Guardian Developments is a west London based design and build company, specialising in residential projects including extensions, refurbishments a...
From £6,330
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 £6,586
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 £6,314
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...

Concrete foundations range from the £6,250 (SxS Design & Build based in W4) to £6,738 (Kuta Design and Build Limited based in W4) in Chiswick.
Comparing extension builders estimates for laying concrete foundations gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Find out the exact cost of laying concrete foundations in Chiswick by posting a job with HaMuch. We will send it to extension builders who can give you a detailed quote.
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