From £88,072
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in KT1. No obligation free quotes ...
From £88,540
Relax... you have found a reliable extension builder in KT1. M & A UK Ltd is a friendly and reliable company based in KT1 who consider no job as to...
From £88,480
Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in KT1. No obligation free qu...
From £88,564
CK Constructions & Development Ltd is a trusted extension builder serving customers in KT1 and the surrounding area. Contact us to today to get a c...
From £88,672
London Construction is an established and experienced local extension builder in KT1. Please contact us for a free, no obligation quote and competi...
From £87,964
A to Z Builders Ltd are here to help customers who need an Extension Builder in KT1. We offer a competitive rate to complete all your extension bui...
From £88,372
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in KT1. No obligation free quot...
From £90,424
Over 20 years experience
Client focussed and driven
Personal planning and completion of work
Warranty ...
From £88,168
Trusted and professional extension builder in KT1. Experienced in all extension buildering work and keeping within budget and on quote. D Dan Const...
From £88,636
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Costs range from £87,964 (A to Z Builders Ltd based in SW1P) to £90,424 (GasHeat based in NW10), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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"Two storey extension" - KT2, job posted 01/01/70
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 - £17,893

Two storey extension - £88,589

Build a timber frame extension - £26,393

Build a swimming pool - £81,393

Single storey extension - £62,856

Side return extension - £45,919

Install an RSJ - £2,593

Outbuilding - £10,393

Build a Mansard loft conversion - £52,393

Loft conversion - £37,433

Build a kitchen extension - £42,393

Hip to gable loft conversion - £42,393

Granny annexe - £87,393

Garden office - £10,393

Convert a Garage - £16,393

Garage - £18,893

Build a flat roof extension - £22,393

Build a dormer loft conversion - £42,393

Concrete foundations - £6,643

Convert a bungalow loft - £29,393

Convert a basement - £41,919