Build additional living space on your property in Forest Gate

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 Forest Gate? To see prices and availability for your job click green button.

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From £86,880

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Can design and Construction

Erald Kanani

Member since August 2025

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

From £87,032

Last active Nov 26
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Major Building Contractors Ltd

Relax... you have found a reliable extension builder in Forest Gate. Major Building Contractors Ltd is a friendly and reliable company based in For...

From £87,184

Last active Nov 26
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Sz Builders

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

Sz Builders provides a local, trusted extension builderi...

From £87,712

Last active Nov 26
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Render

Experienced extension builder ready to quote for your work. Render is the best extension builder in Forest Gate. No obligation free quotes and many...

From £87,176

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Fedora and sons Ltd

MIHAI Martolea

Member since September 2026

Fedora and sons Ltd is a trusted extension builder serving customers in Forest Gate and the surrounding area. Contact us to today to get a competit...

From £87,184

Last active Nov 26
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CC&D BUILDING LTD

Catalin CIOBANU

Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Forest Gate. No obligation free quot...

From £87,168

Last active Oct 26
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M Saleem Builders

Relax... you have found a reliable extension builder in Forest Gate. M Saleem Builders is a friendly and reliable company based in Forest Gate who ...

From £87,152

Last active Oct 26
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UK Drywall Ltd

UK Drywall Ltd is an established and experienced local extension builder in Forest Gate. Please contact us for a free, no obligation quote and comp...

From £87,096

Last active Oct 26
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KS Plastering SERVICE

Sampson Essien

Thistle Bonding Coat: Ideal for use on low-suction backgrounds such as brick or concrete blocks, this product provided a solid foundation, Thi...

From £87,208

Last active Oct 26
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GNB Construction Builders Ltd

Trusted and professional extension builder in Forest Gate. Experienced in all extension buildering work and keeping within budget and on quote. GNB...

Granny Annexe Cost in Forest Gate

Estimates for granny annexe near Forest Gate

Building a granny annexe ranges from £86,880 (Can design and Construction based in Ig11) to £87,712 (Render based in IG1), 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 Forest Gate by posting a job with HaMuch. We will send it to extension builders in Forest Gate who will be happy to help you.


Estimates for common extension builder jobs in Forest Gate;

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...