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Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
SLS BUILDERS LIMITED is a trusted extension builder serving customers in Bloomsbury and the surrounding area. Contact us to today to get a competit...
Torrington Design
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
Relax... you have found a reliable extension builder in Bloomsbury. London Trowel Co. is a friendly and reliable company based in Bloomsbury who co...
Trusted and professional extension builder in Bloomsbury. Experienced in all extension buildering work and keeping within budget and on quote. Ther...
Jay Reid
Darren Bergin
Relax... you have found a reliable extension builder in Bloomsbury. First guard Roofing is a friendly and reliable company based in Bloomsbury who ...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Bloomsbury and the surrounding area. Contact us to today to ...
A to Z Builders Ltd are here to help customers who need an Extension Builder in Bloomsbury. We offer a competitive rate to complete all your extens...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in Bloomsbury. No obligation fr...

A flat roof extension ranges from the cheapest of £21,976 (SLS BUILDERS LIMITED based in NW5) to the dearest of £24,320 (Reid and Co Developments Ltd based in NW8), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in Bloomsbury by posting a job with HaMuch. We'll send it to extension builders in Bloomsbury.
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 - £17,870

Two storey extension - £88,554

Build a timber frame extension - £26,370

Build a swimming pool - £81,370

Single storey extension - £62,392

Side return extension - £45,658

Install an RSJ - £2,570

Outbuilding - £10,370

Build a Mansard loft conversion - £52,370

Loft conversion - £37,215

Build a kitchen extension - £42,370

Hip to gable loft conversion - £42,370

Granny annexe - £87,370

Garden office - £10,370

Convert a Garage - £16,370

Garage - £18,870

Build a flat roof extension - £22,370

Build a dormer loft conversion - £42,370

Concrete foundations - £6,620

Convert a bungalow loft - £29,370

Convert a basement - £41,658