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 Cardiff? To see prices and availability for your job click green button.

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From £26,240

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L.Jones Building

Lewis Jones

Member since October 2026

We are polite, punctual and respectful small construction business. We take pride in all our work.

From £25,728

Last active Oct 26
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The Philog Paving Services

The Philog Paving Services is an established extension buildering business in Cardiff. We come highly recommended and provide competitive quotes fo...

From £25,808

Last active Oct 26
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Chapman Builders

Experienced extension builder ready to quote for your work. Chapman Builders is the best extension builder in Cardiff. No obligation free quotes an...

From £25,616

Last active Sep 26
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JA Building Maintenance

Experienced extension builder ready to quote for your work. JA Building Maintenance is the best extension builder in Cardiff. No obligation free qu...

From £25,784

Last active Sep 26
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TOR BUILD

Experienced extension builder ready to quote for your work. TOR BUILD is the best extension builder in Cardiff. No obligation free quotes and many ...

From £25,632

Last active Sep 26
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Charles Marshall Contracting Ltd

Relax... you have found a reliable extension builder in Cardiff. Charles Marshall Contracting Ltd is a friendly and reliable company based in Cardi...

From £25,200

Last active Aug 26
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Penarth Loft Conversions Ltd

Bill Coslett

35 years in the trade and there is not much we haven't come across or done from pools to extensions and we specialise in loft conversions

From £25,600

Last active Jul 26
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MARWAY BUILDING LTD

MARWAY BUILDING LTD is a trusted extension builder serving customers in Cardiff and the surrounding area. Contact us to today to get a competitive ...

From £25,560

Last active Jul 26
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Elite Building Contractors South Wales

Location

Cardiff, CF5

Trusted and professional extension builder in Cardiff. Experienced in all extension buildering work and keeping within budget and on quote. Elite B...

From £25,040

Last active Jul 26
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PK CONSTRUCTION

Paul Knox

Trusted and professional extension builder in Cardiff. Experienced in all extension buildering work and keeping within budget and on quote. PK CONS...

Timber frame extension cost in Cardiff

Estimates for build a timber frame extension near Cardiff

A timber frame extension built in Cardiff typically ranges from £25,040 (PK CONSTRUCTION based in CF14) to £26,240 (L.Jones Building based in CF62), 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 Cardiff by posting a job with HaMuch and we'll send it to extension builders in Cardiff.


Estimates for common extension builder jobs in Cardiff;

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...