Build additional living space on your property in BT40

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 BT40? To see prices and availability for your job click Get quotes.

HaMuch is Excellent

Granny annexe cost in BT40 - Sort by rates or availability

From £85,976

(last active 06/10/26)
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Anak

David White

Have worked in building industry for over 30 years contracts from government to private sector.

Granny Annexe Cost in BT40

Estimates for granny annexe near BT40

Building a granny annexe ranges from £85,976 (Anak based in BT40) to £85,976 (Anak based in BT40), 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 BT40 by posting a job with HaMuch. We will send it to extension builders in BT40 who will be happy to help you.


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Location in UKHourly RateDaily Rate
Granny Annexe near Larne£15£122
Granny Annexe near Carrickfergus£23£158
Granny Annexe near Ballyclare£20£124
Granny Annexe near Greenisland£23£153
Granny Annexe near Holywood£23£159
Granny Annexe near Bangor£24£183
Granny Annexe near Bangor£24£183
Granny Annexe near Belfast£23£161
Granny Annexe near Ballygowan£24£183
Granny Annexe near Comber£22£160

Estimates for common extension builder jobs in BT40;

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.

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