Find builders to lay your concrete foundations in Cardiff from £5,290

Concrete foundations keep your extension, conservatory or other new building stable for years to come. It's important to hire qualified extension builders to lay your foundations, but how much will it cost in Cardiff? To see prices and availability for your job click green button.

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Concrete foundations cost in Cardiff - Sort by rates or availability

From £6,490

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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 £5,978

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 £6,058

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 £5,866

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 £6,034

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 £5,882

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 £5,450

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 £5,850

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 £5,810

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 £5,290

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...

Concrete foundation costs in Cardiff

Estimates for concrete foundations near Cardiff

Concrete foundations range from the £5,290 (PK CONSTRUCTION based in CF14) to £6,490 (L.Jones Building based in CF62) in Cardiff.
Comparing extension builders estimates for laying concrete foundations gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.

Find out the exact cost of laying concrete foundations in Cardiff by posting a job with HaMuch. We will send it to extension builders who can give you a detailed quote.


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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...