Build additional living space on your property in BN43

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 BN43? To see prices and availability for your job click Get quotes.

HaMuch is Excellent

Granny annexe cost in BN43 - Sort by rates or availability

From £86,992

Member since August 2026

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H P Building Services Sussex

H P Building Services Sussex is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 20 miles arou...

From £86,936

Last active May 26
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ACF Carpentry Ltd

ACF Carpentry Ltd is an established and experienced local extension builder in BN43. Please contact us for a free, no obligation quote and competit...

From £86,984

Last active Mar 26
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FIRST FORMAT BUILDING

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

FIRST FORMAT BUILDING provides a local, trusted extensio...

From £86,880

Last active Mar 26
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KEN BUILDING

KEN BUILDING is an established extension buildering business in BN43. We come highly recommended and provide competitive quotes for your work.

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From £86,912

Last active Mar 26
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K. BRAND BUILDING LIMITED

K. BRAND BUILDING LIMITED are here to help customers who need an Extension Builder in BN43. We offer a competitive rate to complete all your extens...

From £87,296

Last active Mar 26
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Proper Copper Design

Proper Copper DesignWe are a design lead copper homeware company specializing in contemporary handles, taps, showers and accessories. Our products ...

From £86,960

Last active Mar 26
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BRICKTEC BUILDING SERVICES

Trusted and professional extension builder in BN43. Experienced in all extension buildering work and keeping within budget and on quote. BRICKTEC B...

From £87,152

Last active Oct 25
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Rooms in the Roof

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

From £86,936

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Adrian Harris Garden Design And Build

Adrian Harris Garden Design And Build are here to help customers who need an Extension Builder in BN43. We offer a competitive rate to complete all...

From £87,160

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TRULEIGH BUILDERS

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 BN43

Estimates for granny annexe near BN43

Building a granny annexe ranges from £86,880 (KEN BUILDING based in BN3) to £87,296 (Proper Copper Design based in BN3), 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 BN43 by posting a job with HaMuch. We will send it to extension builders in BN43 who will be happy to help you.


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Estimates for common extension builder jobs in BN43;

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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