Khalid Osman
We agree on the work, price and appointment before starting. Our approach focuses on clear communication, punctuality, careful workmanship and leav...
Relax... you have found a reliable extension builder in Belgravia. M & A UK Ltd is a friendly and reliable company based in Belgravia who consider ...
Jay Reid
Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in Belgravia. No obligation f...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Belgravia and the surrounding area. Contact us to today to g...
London Construction is an established and experienced local extension builder in Belgravia. Please contact us for a free, no obligation quote and c...
A to Z Builders Ltd are here to help customers who need an Extension Builder in Belgravia. We offer a competitive rate to complete all your extensi...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in Belgravia. No obligation fre...
JK Doors is a trusted extension builder serving customers in Belgravia and the surrounding area. Contact us to today to get a competitive quote for...
JM Building Services is a trusted extension builder serving customers in Belgravia and the surrounding area. Contact us to today to get a competiti...

Outbuilding costs in Belgravia range from the cheapest of £9,976 (A to Z Builders Ltd based in SW1P) to the dearest of £12,320 (Reid and Co Developments Ltd based in NW8), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in Belgravia by posting a job with HaMuch and we will send it to extension builders.
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 - £17,912

Two storey extension - £88,618

Build a timber frame extension - £26,412

Build a swimming pool - £81,412

Single storey extension - £63,240

Side return extension - £46,135

Install an RSJ - £2,612

Outbuilding - £10,412

Build a Mansard loft conversion - £52,412

Loft conversion - £37,613

Build a kitchen extension - £42,412

Hip to gable loft conversion - £42,412

Granny annexe - £87,412

Garden office - £10,412

Convert a Garage - £16,412

Garage - £18,912

Build a flat roof extension - £22,412

Build a dormer loft conversion - £42,412

Concrete foundations - £6,662

Convert a bungalow loft - £29,412

Convert a basement - £42,135