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POVERSET BUILDING COMPANY
Curtis Archer
Relax... you have found a reliable extension builder in BR6. POVERSET BUILDING COMPANY is a friendly and reliable company based in BR6 who consider...
"Single storey extension" - BR2, job posted 18/11/25
MONUMENTAL CONSTRUCTION LIMITE
MONUMENTAL CONSTRUCTION LIMITE are here to help customers who need an Extension Builder in BR6. We offer a competitive rate to complete all your ex...
"Bungalow loft conversion" - PETTS WOOD, job posted 28/02/25
P&k Building Ltd
Need an Extension Builder in BR6? P&k Building Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for many ye...
"Bungalow loft conversion" - PETTS WOOD, job posted 16/01/25
AL-KO Construction Ltd
Altin Kodra
Our building services company AL-KO Renovations was established over 12 years ago. Since then we have been helping customers in the area by providi...
Ha property services
Ha property services is an established and experienced local extension builder in BR6. Please contact us for a free, no obligation quote and compet...
ORBITAL CONSTRUCTION
Trusted and professional extension builder in BR6. Experienced in all extension buildering work and keeping within budget and on quote. ORBITAL CON...
£47/hr
£293/day
Fairhaven Construction
Orpington, BR6
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£41/hr
£251/day
LBS Builders
LBS Builders is an established and experienced local extension builder in BR6. Please contact us for a free, no obligation quote and competitive ra...
£43/hr
£260/day
Cygnus Construction
Need an Extension Builder in BR6? Cygnus Construction has been helping local clients (10 mile radius) with their extension buildering jobs for many...
£44/hr
£274/day
Oakmore Builders Limited
Oakmore Builders Limited is a trusted extension builder serving customers in BR6 and the surrounding area. Contact us to today to get a competitive...
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- Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local BR6 Extension Builders or phone them directly - you’re in control!
Local Extension Builders in London Boroughs
Job estimates from extension builders near you
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.

Build a timber frame extension - £26,168

Garden office - £10,168

Granny annexe - £87,168

Build a flat roof extension - £22,168

Convert a Garage - £16,168

Hip to gable loft conversion - £42,168

Convert a bungalow loft - £29,168

Build a dormer loft conversion - £42,168

Build a swimming pool - £81,168

Build a Mansard loft conversion - £52,168

Concrete foundations - £6,418

Underpin a building - £17,668

Two storey extension - £88,252

Convert a basement - £39,390

Side return extension - £43,390

Loft conversion - £35,325

Garage - £18,668

Single storey extension - £58,360

Outbuilding - £10,168

Install an RSJ - £2,368

Build a kitchen extension - £42,168
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