Cardiff two storey extensions from £86,560

A two storey extension is a great way to add extra space to your home, adding value to your property. But how much does it cost to build a double storey extension in Cardiff? To see prices and availability for your job click green button.

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From £88,360

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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 £87,592

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 £87,712

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 £87,424

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 £87,676

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 £87,448

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 £86,800

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 £87,400

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 £87,340

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 £86,560

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...

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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...