Build additional living space on your property in Welwyn Garden City

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 Welwyn Garden City? To see prices and availability for your job click green button.

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From £87,456

Last active Oct 26
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Up and Out Builds Ltd

Relax... you have found a reliable extension builder in Welwyn Garden City. Up and Out Builds Ltd is a friendly and reliable company based in Welwy...

From £87,344

Last active Oct 26
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Peter's Gutters

Peter Rourke

Trusted and professional extension builder in Welwyn Garden City. Experienced in all extension buildering work and keeping within budget and on quo...

From £86,968

Last active Oct 26
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A S G Developments - Herts LTD

Amarjeet Gill

Architecture and Construction all in one place. 

FREE DRAWINGS for all projects we build. 

From £86,976

Last active Oct 26
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One Call Bathrooms

At One Call Bathrooms we can tailor our service to provide a bespoke service to all Landlords and Management Agents that will guar...

From £87,232

Last active Oct 26
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Buyerz Trading

Buyerz Trading is an established and experienced local extension builder in Welwyn Garden City. Please contact us for a free, no obligation quote a...

From £87,536

Last active Oct 26
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R. Newman Construction

Are you looking for resin driveways in North London? We are a leading builder of driveways and patios in North London. We have expertise in various...

From £86,864

Last active Oct 26
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Advance Construction Solutions

Trusted and professional extension builder in Welwyn Garden City. Experienced in all extension buildering work and keeping within budget and on quo...

From £87,440

Last active Oct 26
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IC Builders

IC Builders have been helping customers in St Albans and the surrounding area by providing professional, trustworthy building services.We k...

From £87,264

Last active Oct 26
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London Elite Construction

London Elite Construction is an established extension buildering business in Welwyn Garden City. We come highly recommended and provide competitive...

From £87,328

Last active Oct 26
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BSL

BSL are here to help customers who need an Extension Builder in Welwyn Garden City. We offer a competitive rate to complete all your extension buil...

Granny Annexe Cost in Welwyn Garden City

Estimates for granny annexe near Welwyn Garden City

Building a granny annexe ranges from £86,864 (Advance Construction Solutions based in EN6) to £87,536 (R. Newman Construction based in AL4), 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 Welwyn Garden City by posting a job with HaMuch. We will send it to extension builders in Welwyn Garden City who will be happy to help you.


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Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Granny Annexe near Welwyn Garden City£42£269
Granny Annexe near Hatfield£42£266
Granny Annexe near Hertford£46£290
Granny Annexe near Potters Bar£43£273
Granny Annexe near Harpenden£45£282
Granny Annexe near St Albans£43£272
Granny Annexe near Ware£47£296
Granny Annexe near Cheshunt£48£285
Granny Annexe near Stevenage£44£282
Granny Annexe near Hoddesdon£46£296

Estimates for common extension builder jobs in Welwyn Garden City;

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...