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FLEX CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in RM20. We offer a competitive rate to complete all your extens...
The England Team is an established extension buildering business in RM20. We come highly recommended and provide competitive quotes for your work.<...
Grays, RM20
L A CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in RM20. We offer a competitive rate to complete all your extensi...
Trusted and professional extension builder in RM20. Experienced in all extension buildering work and keeping within budget and on quote. PALMERS BU...
From £9,936
Experienced extension builder ready to quote for your work. Renewvate is the best extension builder in RM20. No obligation free quotes and many hap...
From £10,264
Our building services company Vitec Interiors Ltd have over twenty-eight years’ experience in the trade. Since then we have been helping customer...

Garden offices range from the cheapest of £9,936 (Renewvate based in RM17) to the dearest of £10,392 (The England Team based in RM16), 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 RM20 by posting a job with HaMuch. We'll send it to extension builders in RM20.
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 - £17,715

Two storey extension - £88,322

Build a timber frame extension - £26,215

Build a swimming pool - £81,215

Single storey extension - £59,293

Side return extension - £43,915

Install an RSJ - £2,415

Outbuilding - £10,215

Build a Mansard loft conversion - £52,215

Loft conversion - £35,763

Build a kitchen extension - £42,215

Hip to gable loft conversion - £42,215

Granny annexe - £87,215

Garden office - £10,215

Convert a Garage - £16,215

Garage - £18,715

Build a flat roof extension - £22,215

Build a dormer loft conversion - £42,215

Concrete foundations - £6,465

Convert a bungalow loft - £29,215

Convert a basement - £39,915