From £10,048
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in CR9. No obligation free quotes ...
From £10,424
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,312
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in CR9. Please contact us for a free, no obligat...
From £10,392
Need an Extension Builder in CR9? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £9,920
NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...
From £10,432
Krystian Wojasiewicz is a trusted extension builder serving customers in CR9 and the surrounding area. Contact us to today to get a competitive quo...
From £10,432
Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...
From £10,144
Experienced extension builder ready to quote for your work. Khetani Builders (UK) Ltd is the best extension builder in CR9. No obligation free quot...
From £10,304
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...
From £9,904
V.S.P is a trusted extension builder serving customers in CR9 and the surrounding area. Contact us to today to get a competitive quote for extensio...

Garden offices range from the cheapest of £9,904 (V.S.P based in NW10) to the dearest of £10,432 (Krystian Wojasiewicz based in HA9), 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 CR9 by posting a job with HaMuch. We'll send it to extension builders in CR9.
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 - £17,731

Two storey extension - £88,347

Build a timber frame extension - £26,231

Build a swimming pool - £81,231

Single storey extension - £59,624

Side return extension - £44,101

Install an RSJ - £2,431

Outbuilding - £10,231

Build a Mansard loft conversion - £52,231

Loft conversion - £35,918

Build a kitchen extension - £42,231

Hip to gable loft conversion - £42,231

Granny annexe - £87,231

Garden office - £10,231

Convert a Garage - £16,231

Garage - £18,731

Build a flat roof extension - £22,231

Build a dormer loft conversion - £42,231

Concrete foundations - £6,481

Convert a bungalow loft - £29,231

Convert a basement - £40,101