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Select your affordable W7 extension builder
Hardeep Samra
MJ Builders (London) Ltd are here to help customers who need an Extension Builder in W7. We offer a competitive rate to complete all your extension...
Elite Construction London Ltd
Elite Construction London Ltd has been one of the top providers of building and remodeling services in London for more than ten years.Our goal is ...
Experienced extension builder ready to quote for your work. DIAL 1ST CONSTRUCTION LTD is the best extension builder in W7. No obligation free quote...
Global Building & Designs Ltd is an established and experienced local extension builder in W7. Please contact us for a free, no obligation quote an...
Need an Extension Builder in W7? S.K Singh has been helping local clients (10 mile radius) with their extension buildering jobs for many years. Get...
Need an Extension Builder in W7? Polish Builders Union Ltd has been helping local clients (5 mile radius) with their extension buildering jobs for ...
Trusted and professional extension builder in W7. Experienced in all extension buildering work and keeping within budget and on quote. Kacmar Build...
RAF Construction Solutions is an established and experienced local extension builder in W7. Please contact us for a free, no obligation quote and c...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Tom Corrigan Building & Decorating are here to help customers who need an Extension Builder in W7. We offer a competitive rate to complete all your...

Building a granny annexe ranges from £86,896 (RAF Construction Solutions based in TW8) to £87,344 (Kacmar Building Service based in TW8), 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 W7 by posting a job with HaMuch. We will send it to extension builders in W7 who will be happy to help you.
| Borough in London |
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| Granny Annexe in Hanwell |
| Granny Annexe in West Ealing |
| Granny Annexe in Ealing |
| Granny Annexe in Southall |
| Granny Annexe in Greenford |
| Granny Annexe in Southall |
| Granny Annexe in Brentford |
| Granny Annexe in Osterley |
| Granny Annexe in Northolt |
| Granny Annexe in Acton |
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 - £17,632

Two storey extension - £88,198

Build a timber frame extension - £26,132

Build a swimming pool - £81,132

Single storey extension - £57,640

Side return extension - £42,985

Install an RSJ - £2,332

Outbuilding - £10,132

Build a Mansard loft conversion - £52,132

Loft conversion - £34,988

Build a kitchen extension - £42,132

Hip to gable loft conversion - £42,132

Granny annexe - £87,132

Garden office - £10,132

Convert a Garage - £16,132

Garage - £18,632

Build a flat roof extension - £22,132

Build a dormer loft conversion - £42,132

Concrete foundations - £6,382

Convert a bungalow loft - £29,132

Convert a basement - £38,985