Use sustainable materials and save money on your new extension

Timber frame extensions are becoming more and more popular as people understand their thermal properties, cost-effectiveness and general sustainability. Built quicker than masonry frame extensions, they generally cost less and can support a variety of design elements to help you create your dream extension. But how much will a timber frame extension cost in SE20?

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Build a timber frame extension cost in SE20

J&J Building Solutions

From £26,048

(rates verified 18/09/26)

Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in SE20. No obligation free quotes...

Derryard Construction Ltd

From £26,200

(last active 24/09/26)

Relax... you have found a reliable extension builder in SE20. Derryard Construction Ltd is a friendly and reliable company based in SE20 who consid...

B J CULLEN BUILDERS

From £25,968

(last active 24/09/26)

B J CULLEN BUILDERS are here to help customers who need an Extension Builder in SE20. We offer a competitive rate to complete all your extension bu...

Major Building Contractors Ltd

From £26,032

(last active 24/09/26)

Relax... you have found a reliable extension builder in SE20. Major Building Contractors Ltd is a friendly and reliable company based in SE20 who c...

Sz Builders

From £26,184

(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 £26,712

(last active 24/09/26)

Experienced extension builder ready to quote for your work. Render is the best extension builder in SE20. No obligation free quotes and many happy ...

Jhon

From £25,896

(last active 24/09/26)

Experienced extension builder ready to quote for your work. Jhon is the best extension builder in SE20. No obligation free quotes and many happy cu...

Can design and Construction

From £25,880

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 £26,192

(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 £26,312

(last active 24/09/26)

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

Timber frame extension cost in SE20

Estimates for build a timber frame extension near SE20

A timber frame extension built in SE20 typically ranges from £25,880 (Can design and Construction based in Ig11) to £26,712 (Render based in IG1), but this will vary depending on the size of your extension, the design features you'd like and what your soil is like for the foundations.

Comparing extension builders estimates for building a timber frame extension 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 a timber frame extension in SE20 by posting a job with HaMuch and we'll send it to extension builders in SE20.


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Estimates for common extension builder jobs in SE20;

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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