Build additional living space on your property in SP1

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 SP1?

Granny annexe cost in SP1 - Sort by rates or availability

From £86,872

(last active 07/10/26)
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General Building Services (Southampton) Ltd

Luke Rees

General Building Services (Southampton) Ltd is a trusted extension builder serving customers in SP1 and the surrounding area. Contact us to today t...

From £87,176

(last active 07/10/26)
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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 SP1. No obligation free quotes an...

From £87,144

(last active 08/09/26)
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Bailey Construction Services

Bailey Construction Services are here to help customers who need an Extension Builder in SP1. We offer a competitive rate to complete all your exte...

From £87,040

(last active 21/07/26)
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Grant Construction

Experienced extension builder ready to quote for your work. Grant Construction is the best extension builder in SP1. No obligation free quotes and ...

From £86,984

(last active 20/07/26)
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T & S Construction

Need an Extension Builder in SP1? T & S Construction has been helping local clients (20 mile radius) with their extension buildering jobs for many ...

From £86,856

(last active 01/06/26)
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Trowel On

Trowel On is an established extension buildering business in SP1. We come highly recommended and provide competitive quotes for your work.

From £86,984

(last active 29/05/26)
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Bob Shearer Property Maintenance, Building & Roofing

Relax... you have found a reliable extension builder in SP1. Bob Shearer Property Maintenance, Building & Roofing is a friendly and reliable compan...

From £87,184

(last active 27/05/26)
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Novare Plumbing Ltd

The business offers a full design service for both kitchens and bathrooms.We work with you to make the best use of your space and find prod...

From £87,136

(last active 23/05/26)
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Arkson builders ltd

Benjamin Belsey

Arkson builders ltd is an established and experienced local extension builder in SP1. Please contact us for a free, no obligation quote and competi...

From £87,024

(last active 23/05/26)
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K E Sainsbury Builders

Kevin Sainsbury

K E Sainsbury Builders is an established and experienced local extension builder in SP1. Please contact us for a free, no obligation quote and comp...

Granny Annexe Cost in SP1

Estimates for granny annexe near SP1

Building a granny annexe ranges from £86,856 (Trowel On based in SO40) to £87,184 (Novare Plumbing Ltd based in SO51), 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 SP1 by posting a job with HaMuch. We will send it to extension builders in SP1 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 Salisbury£35£247
Granny Annexe near Test Valley£37£261
Granny Annexe near Romsey£32£230
Granny Annexe near New Forest£32£245
Granny Annexe near Andover£40£248
Granny Annexe near Totton£34£243
Granny Annexe near Chandler's Ford£34£245
Granny Annexe near Eastleigh£34£244
Granny Annexe near Devizes£32£242
Granny Annexe near Southampton£34£243

Estimates for common extension builder jobs in SP1;

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...