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Lee Townsend
Need to find an Extension Builder near you for all your extension buildering work?
Lp Townsend Brickwork provides a local, trusted extensio...
Relax... you have found a reliable extension builder in London. GDW Construction is a friendly and reliable company based in London who consider no...
Need to find an Extension Builder near you for all your extension buildering work?
OAK HOUSE BESPOKE BUILDERS provides a local, trusted ext...
Sean Smithers
Our building services company SDS Constructions has been established for many years and have been providing customers in Dagenham and the surroundi...
Vasile Boghean
Optimus Build Solutions delivers exceptional construction services in London and surronding areas. Specializing in bathroom and kitchen refurbishme...
SC General Builders Ltd are here to help customers who need an Extension Builder in London. We offer a competitive rate to complete all your extens...
Mandala Building Services is a family-owned design and build maintenance company, encompassing everything from residential refurbishment to large-s...
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in London. No obligation free quot...
London Construction is an established and experienced local extension builder in London. Please contact us for a free, no obligation quote and comp...

Garage conversions in London typically range from £15,920 (Lp Townsend Brickwork based in SL2) to £17,232 (Optimus Build Solutions based in Rm1), but the only way to get an accurate cost for your specific project is to get quotes.
Post a job with HaMuch and we'll send it to extension builders in London who will be happy to help.
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 - £17,946

Two storey extension - £88,668

Build a timber frame extension - £26,446

Build a swimming pool - £81,446

Single storey extension - £63,912

Side return extension - £46,513

Install an RSJ - £2,646

Outbuilding - £10,446

Build a Mansard loft conversion - £52,446

Loft conversion - £37,928

Build a kitchen extension - £42,446

Hip to gable loft conversion - £42,446

Granny annexe - £87,446

Garden office - £10,446

Convert a Garage - £16,446

Garage - £18,946

Build a flat roof extension - £22,446

Build a dormer loft conversion - £42,446

Concrete foundations - £6,696

Convert a bungalow loft - £29,446

Convert a basement - £42,513