Build additional living space on your property in SW16

A granny annexe is the ideal solution for offering a young family member their own space in your home while they save up for their own house, or to help an older relative have some independence while keeping them at a safe distance. But how much do they cost to build in SW16?

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Granny annexe cost in SW16

J&J Building Solutions

From £87,048

(rates verified 18/09/26)

Location

Streatham, SW16

Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in SW16. No obligation free quotes...

Derryard Construction Ltd

From £87,200

(last active 24/09/26)

Relax... you have found a reliable extension builder in SW16. Derryard Construction Ltd is a friendly and reliable company based in SW16 who consid...

B J CULLEN BUILDERS

From £86,968

(last active 24/09/26)

B J CULLEN BUILDERS are here to help customers who need an Extension Builder in SW16. We offer a competitive rate to complete all your extension bu...

Major Building Contractors Ltd

From £87,032

(last active 24/09/26)

Relax... you have found a reliable extension builder in SW16. Major Building Contractors Ltd is a friendly and reliable company based in SW16 who c...

Sz Builders

From £87,184

(last active 24/09/26)

Need to find an Extension Builder near you for all your extension buildering work?

Sz Builders provides a local, trusted extension builderi...

Render

From £87,712

(last active 24/09/26)

Experienced extension builder ready to quote for your work. Render is the best extension builder in SW16. No obligation free quotes and many happy ...

Jhon

From £86,896

(last active 24/09/26)

Experienced extension builder ready to quote for your work. Jhon is the best extension builder in SW16. No obligation free quotes and many happy cu...

Can design and Construction

From £86,880

Member since August 2025

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Torrington

From £87,192

(last active 24/09/26)

NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...

Guven Buildings LTD

From £87,312

(last active 24/09/26)

skilled worker who specializes in completing a wide range of building and renovation projects

Granny Annexe Cost in SW16

Estimates for granny annexe near SW16

Building a granny annexe ranges from £86,880 (Can design and Construction based in Ig11) to £87,712 (Render based in IG1), 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 SW16 by posting a job with HaMuch. We will send it to extension builders in SW16 who will be happy to help you.


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Estimates for common extension builder jobs in SW16;

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.

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