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Select your affordable NW9 extension builder
Ciaran Feeney
Need to find an Extension Builder near you for all your extension buildering work?
COMPLETE CIVIL ENGINEERING provides a local, trusted ext...
Krystian Wojasiewicz
Krystian Wojasiewicz is a trusted extension builder serving customers in NW9 and the surrounding area. Contact us to today to get a competitive quo...
Colindale, NW9
Trusted and professional extension builder in NW9. Experienced in all extension buildering work and keeping within budget and on quote. WHITE EAGLE...
Trusted and professional extension builder in NW9. Experienced in all extension buildering work and keeping within budget and on quote. D Dan Const...
Marcel Simion
Hi everyone!
i have good experience over 25 years working in construction and I have my on Business and my company
"I'm very happy for the job what his done" - LONDON,reviewed 29/09/17, SIMONA
Karsan Dabasia
Trusted and professional extension builder in NW9. Experienced in all extension buildering work and keeping within budget and on quote. EUROCONTRAC...
Manoj Basia
London, NW9
Need an Extension Builder in NW9? HONEST CONTRUCTION LIMITED has been helping local clients (5 mile radius) with their extension buildering jobs fo...
HARLEY BUILDING SERVICES LTD are here to help customers who need an Extension Builder in NW9. We offer a competitive rate to complete all your exte...
Colindale, NW9
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Fabio Capani
With over 24 years of hands-on experience, FC Builders London Ltd specialises in home extensions, loft conversions, full renovations, kitchen and b...

Garden offices range from the cheapest of £9,664 (F C Builders London ltd based in HA8) to the dearest of £10,440 (COMPLETE CIVIL ENGINEERING based in HA8), 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 NW9 by posting a job with HaMuch. We'll send it to extension builders in NW9.
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 - £17,569

Two storey extension - £88,103

Build a timber frame extension - £26,069

Build a swimming pool - £81,069

Single storey extension - £56,376

Side return extension - £42,274

Install an RSJ - £2,269

Outbuilding - £10,069

Build a Mansard loft conversion - £52,069

Loft conversion - £34,395

Build a kitchen extension - £42,069

Hip to gable loft conversion - £42,069

Granny annexe - £87,069

Garden office - £10,069

Convert a Garage - £16,069

Garage - £18,569

Build a flat roof extension - £22,069

Build a dormer loft conversion - £42,069

Concrete foundations - £6,319

Convert a bungalow loft - £29,069

Convert a basement - £38,274