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Vas Constructs
RUBBERCOVER™ EPDM Permaroof rubber cover and roof system. Lead flashing. NCTS. Timber Frame Buildings. Refurbish fit out, structural ...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Newpark Construction are here to help customers who need an Extension Builder in W3. We offer a competitive rate to complete all your extension bui...
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
London, W3
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...
Mick Shehabi
Vision Refurbishments Ltd. brings over 10 years of experience in building and construction, including interior and exterior renovations, painting, ...
Experienced extension builder ready to quote for your work. HUGHES BUILDERS is the best extension builder in W3. No obligation free quotes and many...
R Burton & Sons Builders are here to help customers who need an Extension Builder in W3. We offer a competitive rate to complete all your extension...
Need to find an Extension Builder near you for all your extension buildering work?
Heaven Sent Construction provides a local, trusted exten...
PJS Building & Maintenance Ltd is a trusted extension builder serving customers in W3 and the surrounding area. Contact us to today to get a compet...

Garden offices range from the cheapest of £10,024 (HUGHES BUILDERS based in W12) to the dearest of £11,840 (1st & 2nd Fix Vasconstruct based in W12), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in W3 by posting a job with HaMuch. We'll send it to extension builders in W3.
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 - £17,902

Two storey extension - £88,604

Build a timber frame extension - £26,402

Build a swimming pool - £81,402

Single storey extension - £63,048

Side return extension - £46,027

Install an RSJ - £2,602

Outbuilding - £10,402

Build a Mansard loft conversion - £52,402

Loft conversion - £37,523

Build a kitchen extension - £42,402

Hip to gable loft conversion - £42,402

Granny annexe - £87,402

Garden office - £10,402

Convert a Garage - £16,402

Garage - £18,902

Build a flat roof extension - £22,402

Build a dormer loft conversion - £42,402

Concrete foundations - £6,652

Convert a bungalow loft - £29,402

Convert a basement - £42,027