From £87,344
Orpington, BR6
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,312
Trusted and professional extension builder in BR6. Experienced in all extension buildering work and keeping within budget and on quote. ORBITAL CON...
From £87,528
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...
From £87,008
LBS Builders is an established and experienced local extension builder in BR6. Please contact us for a free, no obligation quote and competitive ra...
From £87,216
Relax... you have found a reliable extension builder in BR6. POVERSET BUILDING COMPANY is a friendly and reliable company based in BR6 who consider...
From £87,080
Need an Extension Builder in BR6? Cygnus Construction has been helping local clients (10 mile radius) with their extension buildering jobs for many...
From £87,096
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...
From £86,896
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...
From £87,080
Experienced extension builder ready to quote for your work. Probuilder London Ltd is the best extension builder in BR6. No obligation free quotes a...
From £87,192
Oakmore Builders Limited is a trusted extension builder serving customers in BR6 and the surrounding area. Contact us to today to get a competitive...

Building a granny annexe ranges from £86,896 (MONUMENTAL CONSTRUCTION LIMITE based in BR2) to £87,528 (AL-KO Construction Ltd based in BR5), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in BR6 by posting a job with HaMuch. We will send it to extension builders in BR6 who will be happy to help you.
| Borough in London |
|---|
| Granny Annexe in Orpington |
| Granny Annexe in Petts Wood |
| Granny Annexe in Chislehurst |
| Granny Annexe in Keston |
| Granny Annexe in Sidcup |
| Granny Annexe in Swanley |
| Granny Annexe in West Wickam |
| Granny Annexe in Bromley |
| Granny Annexe in Bexley |
| Granny Annexe in Westerham |
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 - £17,675

Two storey extension - £88,263

Build a timber frame extension - £26,175

Build a swimming pool - £81,175

Single storey extension - £58,504

Side return extension - £43,471

Install an RSJ - £2,375

Outbuilding - £10,175

Build a Mansard loft conversion - £52,175

Loft conversion - £35,393

Build a kitchen extension - £42,175

Hip to gable loft conversion - £42,175

Granny annexe - £87,175

Garden office - £10,175

Convert a Garage - £16,175

Garage - £18,675

Build a flat roof extension - £22,175

Build a dormer loft conversion - £42,175

Concrete foundations - £6,425

Convert a bungalow loft - £29,175

Convert a basement - £39,471