Build additional living space on your property in Eastleigh

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

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From £87,800

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Boss

Karl Builder

Member since October 2026

Hi we are a building company that have been working in the swindon area for many years we also work as far as bristol We do loft conversion. ...

From £86,968

Last active Nov 26
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Andy's Building Services

Trusted and professional extension builder in Eastleigh. Experienced in all extension buildering work and keeping within budget and on quote. Andy'...

From £87,192

Last active Oct 26
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AAConcepts

Arshad Ali

We are a Design and Build company based in Hampshire. Proud of our roots, we try to be the very best in the way we go about our business. Friendly...

From £86,960

Last active Oct 26
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ROB DINE CONSTRUCTION

ROB DINE CONSTRUCTION is an established and experienced local extension builder in Eastleigh. Please contact us for a free, no obligation quote and...

From £87,120

Last active Oct 26
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Mobile Services

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

Mobile Services provides a local, trusted extension buil...

From £87,136

Last active Oct 26
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Claytons Building and Roofing

Claytons Building and Roofing are here to help customers who need an Extension Builder in Eastleigh. We offer a competitive rate to complete all yo...

From £86,752

Last active Oct 26
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Steve Lovett Builders

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

From £86,872

Last active Oct 26
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General Building Services (Southampton) Ltd

Luke Rees

Location

Eastleigh, SO53

General Building Services (Southampton) Ltd is a trusted extension builder serving customers in Eastleigh and the surrounding area. Contact us to t...

From £87,176

Last active Oct 26
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CSY Construction Ltd

Experienced extension builder ready to quote for your work. CSY Construction Ltd is the best extension builder in Eastleigh. No obligation free quo...

From £87,040

Last active Jul 26
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Grant Construction

Experienced extension builder ready to quote for your work. Grant Construction is the best extension builder in Eastleigh. No obligation free quote...

Granny Annexe Cost in Eastleigh

Estimates for granny annexe near Eastleigh

Building a granny annexe ranges from £86,752 (Steve Lovett Builders based in SO18) to £87,800 (Boss based in SO23), 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 Eastleigh by posting a job with HaMuch. We will send it to extension builders in Eastleigh 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 Eastleigh£34£244
Granny Annexe near Chandler's Ford£34£245
Granny Annexe near Southampton£34£243
Granny Annexe near Hedge End£34£244
Granny Annexe near Romsey£32£230
Granny Annexe near Totton£34£243
Granny Annexe near Winchester£39£283
Granny Annexe near Locks Heath£33£240
Granny Annexe near Fareham£35£250
Granny Annexe near New Forest£32£245

Estimates for common extension builder jobs in Eastleigh;

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...