Build additional living space on your property in City Of Westminster

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 City Of Westminster?

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Granny annexe cost in City Of Westminster

J&J Building Solutions

From £87,048

(rates verified 18/09/26)

Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in City Of Westminster. No obligat...

T M Builder

From £87,312

(last active 24/09/26)

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

Derryard Construction Ltd

From £87,200

(last active 24/09/26)

Relax... you have found a reliable extension builder in City Of Westminster. Derryard Construction Ltd is a friendly and reliable company based in ...

B J CULLEN BUILDERS

From £86,968

(last active 24/09/26)

B J CULLEN BUILDERS are here to help customers who need an Extension Builder in City Of Westminster. We offer a competitive rate to complete all yo...

Major Building Contractors Ltd

From £87,032

(last active 24/09/26)

Relax... you have found a reliable extension builder in City Of Westminster. Major Building Contractors Ltd is a friendly and reliable company base...

Sz Builders

From £87,184

(last active 24/09/26)

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

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

Render

From £87,712

(last active 24/09/26)

Experienced extension builder ready to quote for your work. Render is the best extension builder in City Of Westminster. No obligation free quotes ...

Jhon

From £86,896

(last active 24/09/26)

Experienced extension builder ready to quote for your work. Jhon is the best extension builder in City Of Westminster. No obligation free quotes an...

Can design and Construction

From £86,880

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...

Torrington

From £87,192

(last active 24/09/26)

NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...

Granny Annexe Cost in City Of Westminster

Estimates for granny annexe near City Of Westminster

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 City Of Westminster by posting a job with HaMuch. We will send it to extension builders in City Of Westminster who will be happy to help you.


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Location in UKHourly RateDaily Rate
Granny Annexe near London£45£274
Granny Annexe near Camden Town£44£277
Granny Annexe near Belgravia£44£276
Granny Annexe near Chelsea£44£276
Granny Annexe near Lambeth£44£275
Granny Annexe near Kensington£44£277
Granny Annexe near Islington£45£276
Granny Annexe near Fulham£44£277
Granny Annexe near Camberwell£44£276
Granny Annexe near Bethnal Green£45£276

Estimates for common extension builder jobs in City Of Westminster;

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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