Build additional living space on your property in Barnes

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 Barnes? To see prices and availability for your job click Get quotes.

HaMuch is Excellent

Granny annexe cost in Barnes - Sort by rates or availability

From £87,208

(last active 18/10/26)
Get quotes

Building Vision London Ltd

Building Vision London Ltd is a trusted extension builder serving customers in Barnes and the surrounding area. Contact us to today to get a compet...

From £87,448

(last active 17/10/26)
Get quotes

AJ Wells

Need to find an Extension Builder near you for all your extension buildering work?

AJ Wells provides a local, trusted extension buildering ...

From £87,192

(last active 17/10/26)
Get quotes

AG-Renovation Ltd

AG-Renovation Ltd is a trusted extension builder serving customers in Barnes and the surrounding area. Contact us to today to get a competitive quo...

From £87,168

(last active 05/10/26)
Get quotes

Newpark Construction

Newpark Construction are here to help customers who need an Extension Builder in Barnes. We offer a competitive rate to complete all your extension...

From £87,504

(last active 02/10/26)
Get quotes

Ferdas Design & Build Ltd

At Ferdas Design & Build Ltd we have been fitting bespoke bathrooms since 2013. We pride ourselves on being the go-to bathroom fitters for discerni...

From £87,304

(last active 01/10/26)
Get quotes

The Diamond Property Service Ltd

Tomasz Pedowicz

Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...

From £87,448

(last active 29/09/26)
Get quotes

London Construction

London Construction is an established and experienced local extension builder in Barnes. Please contact us for a free, no obligation quote and comp...

From £87,256

(last active 21/09/26)
Get quotes

Red Box Maintenance Ltd

Red Box are a Fulham-based building and decorating business who work in West and Southwest London, and who specialise in fine interior renovations,...

From £87,160

(last active 17/09/26)
Get quotes

AVIB City Construction Ltd

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

From £87,136

(last active 17/09/26)
Get quotes

KEVIN GEAR BUILDING & MAINTIAN

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Granny Annexe Cost in Barnes

Estimates for granny annexe near Barnes

Building a granny annexe ranges from £87,136 (KEVIN GEAR BUILDING & MAINTIAN based in SW15) to £87,504 (Ferdas Design & Build Ltd based in W3), 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 Barnes by posting a job with HaMuch. We will send it to extension builders in Barnes who will be happy to help you.


Get extension builder rates instantly

Estimates for common extension builder jobs in Barnes;

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...