From £88,120
Orpington, BR5
Experienced extension builder ready to quote for your work. Probuilder London Ltd is the best extension builder in BR5. No obligation free quotes a...
From £88,288
Oakmore Builders Limited is a trusted extension builder serving customers in BR5 and the surrounding area. Contact us to today to get a competitive...
From £88,012
Orpington, BR5
LBS Builders is an established and experienced local extension builder in BR5. Please contact us for a free, no obligation quote and competitive ra...
From £88,120
Need an Extension Builder in BR5? Cygnus Construction has been helping local clients (10 mile radius) with their extension buildering jobs for many...
From £88,144
Petts Wood, BR5
Need an Extension Builder in BR5? P&k Building Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for many ye...
From £88,324
Relax... you have found a reliable extension builder in BR5. POVERSET BUILDING COMPANY is a friendly and reliable company based in BR5 who consider...
From £87,796
Petts Wood, BR5
Need an Extension Builder in BR5? RJC BUILDING SERVICES has been helping local clients (10 mile radius) with their extension buildering jobs for ma...
From £88,120
Alpha Construction Building Company ltd. undertakes a wide variety of refurbishment works from roofing, kitchens and bathrooms to lofts extensions ...
From £88,012
Kent, BR5
Ha property services is an established and experienced local extension builder in BR5. Please contact us for a free, no obligation quote and compet...
From £88,504
Our building services company Precise Building Limited have fifteen-year experience of helping customers in Kent and the surrounding area by provid...

Costs range from £87,796 (RJC BUILDING SERVICES based in BR5) to £88,504 (Precise Building Limited based in BR5), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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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 - £17,596

Two storey extension - £88,144

Build a timber frame extension - £26,096

Build a swimming pool - £81,096

Single storey extension - £56,920

Side return extension - £42,580

Install an RSJ - £2,296

Outbuilding - £10,096

Build a Mansard loft conversion - £52,096

Loft conversion - £34,650

Build a kitchen extension - £42,096

Hip to gable loft conversion - £42,096

Granny annexe - £87,096

Garden office - £10,096

Convert a Garage - £16,096

Garage - £18,596

Build a flat roof extension - £22,096

Build a dormer loft conversion - £42,096

Concrete foundations - £6,346

Convert a bungalow loft - £29,096

Convert a basement - £38,580