From £87,320
Greater London, SW7
Hartley Homes is an established and experienced local extension builder in SW7. Please contact us for a free, no obligation quote and competitive r...
From £87,224
Need to find an Extension Builder near you for all your extension buildering work?
Ventura Property Developments provides a local, trusted ...
From £87,248
Experienced extension builder ready to quote for your work. Clarisford is the best extension builder in SW7. No obligation free quotes and many hap...
From £87,528
Clarisford is a property developer and Design & Build firm that specialise in the creation of extraordinary projects from concept all the way to co...
From £87,336
Need to find an Extension Builder near you for all your extension buildering work?
Hearne House provides a local, trusted extension builder...
From £87,320
Need to find an Extension Builder near you for all your extension buildering work?
Crosshatch provides a local, trusted extension builderin...
From £87,392
We are Crosshatch, the exciting collaboration between residential renovation and build experts, Sanjay Parmar and Max Thakrar and multiple award-wi...
From £87,088
Need to find an Extension Builder near you for all your extension buildering work?
MALLETT provides a local, trusted extension buildering s...
From £87,032
Greater London, SW7
Jeffery and Wilkes is an established and experienced local extension builder in SW7. Please contact us for a free, no obligation quote and competit...
From £87,048
Trusted and professional extension builder in SW7. Experienced in all extension buildering work and keeping within budget and on quote. OL AND EDWA...

Building a granny annexe ranges from £87,032 (Jeffery and Wilkes based in SW7) to £87,528 (Clarisford based in SW3), 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 SW7 by posting a job with HaMuch. We will send it to extension builders in SW7 who will be happy to help 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.

Underpin a building - £17,754

Two storey extension - £88,380

Build a timber frame extension - £26,254

Build a swimming pool - £81,254

Single storey extension - £60,072

Side return extension - £44,353

Install an RSJ - £2,454

Outbuilding - £10,254

Build a Mansard loft conversion - £52,254

Loft conversion - £36,128

Build a kitchen extension - £42,254

Hip to gable loft conversion - £42,254

Granny annexe - £87,254

Garden office - £10,254

Convert a Garage - £16,254

Garage - £18,754

Build a flat roof extension - £22,254

Build a dormer loft conversion - £42,254

Concrete foundations - £6,504

Convert a bungalow loft - £29,254

Convert a basement - £40,353