Build additional living space on your property in Barry

A granny annexe is the ideal solution for offering a young family member their own space in your home while they save up for their own house, or to help an older relative have some independence while keeping them at a safe distance. But how much do they cost to build in Barry? To see prices and availability for your job click green button.

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From £87,240

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L.Jones Building

Lewis Jones

Member since October 2026

Location

Barry, CF62

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

From £86,728

Last active Oct 26
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The Philog Paving Services

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

From £86,808

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 Barry. No obligation free quotes and ...

From £86,616

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 Barry. No obligation free quot...

From £86,200

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 £86,600

Last active Jul 26
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MARWAY BUILDING LTD

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

From £86,560

Last active Jul 26
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Elite Building Contractors South Wales

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

From £86,760

Last active Jun 26
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RDL BUILDING SERVICES LTD

Robert Lewis

RDL BUILDING SERVICES LTD is a trusted extension builder serving customers in Barry and the surrounding area. Contact us to today to get a competit...

From £86,584

Last active Apr 26
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DPC BUILDERS

Location

Barry, CF62

Relax... you have found a reliable extension builder in Barry. DPC BUILDERS is a friendly and reliable company based in Barry who consider no job a...

From £87,600

Last active Mar 26
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Blueprint Construction & Development Ltd

Location

Barry, CF62

Blueprint Construction & Development Ltd is a trusted extension builder serving customers in Barry and the surrounding area. Contact us to today to...

Granny Annexe Cost in Barry

Estimates for granny annexe near Barry

Building a granny annexe ranges from £86,200 (Penarth Loft Conversions Ltd based in CF64) to £87,600 (Blueprint Construction & Development Ltd based in CF62), but these are just estimates that can help give you an idea of who will be better value in your area.

The best thing to do is to get quotes to build a granny annexe in Barry by posting a job with HaMuch. We will send it to extension builders in Barry who will be happy to help you.


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Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Granny Annexe near Barry£33£223
Granny Annexe near Penarth£35£224
Granny Annexe near Vale of Glamorgan£29£217
Granny Annexe near Cardiff£34£223
Granny Annexe near Church Village£34£214
Granny Annexe near Caerphilly£33£208
Granny Annexe near Bridgend£32£200
Granny Annexe near Pontypridd£33£211
Granny Annexe near Rhondda£31£206
Granny Annexe near Weston-super-Mare£33£253

Estimates for common extension builder jobs in Barry;

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...