Build additional living space on your property in B20

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 B20? To see prices and availability for your job click Get quotes.

HaMuch is Excellent

Granny annexe cost in B20 - Sort by rates or availability

From £86,704

(last active 29/09/26)
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AJ Home Improvements

AJ Home Improvements is an established extension buildering business in B20. We come highly recommended and provide competitive quotes for your wor...

From £86,984

(last active 29/09/26)
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Atwal Building Services Ltd

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

Atwal Building Services Ltd provides a local, trusted ex...

From £86,984

(last active 29/09/26)
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Brickfast Builders

Brickfast Builders is an established extension buildering business in B20. We come highly recommended and provide competitive quotes for your work....

From £86,568

(last active 25/09/26)
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Bhogal Construction

Trusted and professional extension builder in B20. Experienced in all extension buildering work and keeping within budget and on quote. Bhogal Cons...

From £86,864

(last active 25/09/26)
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LC BUILDING SERVICES

Lloyd Clarke

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

LC BUILDING SERVICES provides a local, trusted extension...

From £86,840

(last active 25/09/26)
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MD Services

Relax... you have found a reliable extension builder in B20. MD Services is a friendly and reliable company based in B20 who consider no job as too...

From £86,568

(last active 15/09/26)
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Dave Mattock

Dave Mattock is an established and experienced local extension builder in B20. Please contact us for a free, no obligation quote and competitive ra...

From £86,944

(last active 15/09/26)
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D&J Advanced Builders

Need an Extension Builder in B20? D&J Advanced Builders has been helping local clients (20 mile radius) with their extension buildering jobs for ma...

From £87,128

(last active 10/07/26)
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Sanwood

Sanj Sandhu

Relax... you have found a reliable extension builder in B20. Sanwood is a friendly and reliable company based in B20 who consider no job as too big...

From £86,920

(last active 27/11/25)
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x10hosts

Experienced extension builder ready to quote for your work. x10hosts is the best extension builder in B20. No obligation free quotes and many happy...

Granny Annexe Cost in B20

Estimates for granny annexe near B20

Building a granny annexe ranges from £86,568 (Bhogal Construction based in B67) to £87,128 (Sanwood based in B73), 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 B20 by posting a job with HaMuch. We will send it to extension builders in B20 who will be happy to help you.


Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Granny Annexe near Birmingham£28£226
Granny Annexe near Smethwick£28£225
Granny Annexe near West Bromwich£28£225
Granny Annexe near Sandwell£29£228
Granny Annexe near Oldbury£29£226
Granny Annexe near Sutton Coldfield£29£228
Granny Annexe near Wednesbury£29£227
Granny Annexe near Rowley Regis£29£225
Granny Annexe near Walsall£29£226
Granny Annexe near Tipton£29£226

Estimates for common extension builder jobs in B20;

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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