Add an outbuilding to your property in Streatham from £10,048

Outbuildings are the perfect way to add extra space to your property when you need a bit of quiet from the main house. Whether it's for a garden office, gym or workshop, an outbuilding can add value to your home and increase your quality of life. To see prices and availability for your job click green button.

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From £10,048

Rates verified Sep 26
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J&J Building Solutions

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

From £10,144

Last active Nov 26
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Greens Gardening & Landscape Property Maintenance

John Mcdonagh

Watch our short video highlighting all our expertise and services here:

more than 10 y...

From £11,200

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Banga Decoration

Sebastian Banga

Member since August 2025

Banga decoration. Is Base in south London  for number of year  Banga decoration is a small  company. Wich provide an excellent job to the custom...

From £11,024

Last active Oct 26
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Buci builders ltd

Robert Buci

Buci builders ltd is a trusted extension builder serving customers in Streatham and the surrounding area. Contact us to today to get a competitive ...

From £10,128

Last active Oct 26
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J & D Construction

Trusted and professional extension builder in Streatham. Experienced in all extension buildering work and keeping within budget and on quote. J & D...

From £10,104

Last active Oct 26
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Langston Builders

Langston Builders is a trusted extension builder serving customers in Streatham and the surrounding area. Contact us to today to get a competitive ...

From £10,072

Last active Oct 26
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Sonik Building Services

Trusted and professional extension builder in Streatham. Experienced in all extension buildering work and keeping within budget and on quote. Sonik...

From £10,416

Last active Oct 26
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ACE BUILDING CONTRACTORS AND D

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

From £10,320

Last active Oct 26
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Renaissance Timothy Brewer Ltd

Renaissance Timothy Brewer Ltd is an established extension buildering business in Streatham. We come highly recommended and provide competitive quo...

From £10,184

Last active Oct 26
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Tenfold Renovation

Tenfold Renovation

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

Tenfold Renovation provides a local, trusted extension b...

Outbuilding cost in Streatham

Estimates for outbuilding near Streatham

Outbuilding costs in Streatham range from the cheapest of £10,048 (J&J Building Solutions based in SW16) to the dearest of £11,200 (Banga Decoration based in CR7), but these are just estimates.

Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.

Get rates and quotes to build an outbuilding in Streatham by posting a job with HaMuch and we will send it to extension builders.


Estimates for common extension builder jobs in Streatham;

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.

More extensions & conversions cost guides...