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Andy Harris
Andy Harris Construction is an established and experienced local extension builder in Chiswick. Please contact us for a free, no obligation quote a...
Vas Constructs
RUBBERCOVER™ EPDM Permaroof rubber cover and roof system. Lead flashing. NCTS. Timber Frame Buildings. Refurbish fit out, structural ...
Building Vision London Ltd is a trusted extension builder serving customers in Chiswick and the surrounding area. Contact us to today to get a comp...
Red Box are a Fulham-based building and decorating business who work in West and Southwest London, and who specialise in fine interior renovations,...
Need to find an Extension Builder near you for all your extension buildering work?
AJ Wells provides a local, trusted extension buildering ...
AG-Renovation Ltd is a trusted extension builder serving customers in Chiswick and the surrounding area. Contact us to today to get a competitive q...
Newpark Construction are here to help customers who need an Extension Builder in Chiswick. We offer a competitive rate to complete all your extensi...
At Ferdas Design & Build Ltd we have been fitting bespoke bathrooms since 2013. We pride ourselves on being the go-to bathroom fitters for discerni...
Tomasz Pedowicz
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...
Elite Construction London Ltd
Elite Construction London Ltd has been one of the top providers of building and remodeling services in London for more than ten years.Our goal is ...

Concrete foundations range from the £6,154 (Elite Construction London Ltd based in TW8) to £8,090 (1st & 2nd Fix Vasconstruct based in W12) 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 - £17,924

Two storey extension - £88,636

Build a timber frame extension - £26,424

Build a swimming pool - £81,424

Single storey extension - £63,480

Side return extension - £46,270

Install an RSJ - £2,624

Outbuilding - £10,424

Build a Mansard loft conversion - £52,424

Loft conversion - £37,725

Build a kitchen extension - £42,424

Hip to gable loft conversion - £42,424

Granny annexe - £87,424

Garden office - £10,424

Convert a Garage - £16,424

Garage - £18,924

Build a flat roof extension - £22,424

Build a dormer loft conversion - £42,424

Concrete foundations - £6,674

Convert a bungalow loft - £29,424

Convert a basement - £42,270