Build additional living space on your property in Croydon

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

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From £87,144

Last active Nov 26
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Greens Gardening & Landscape Property Maintenance

John Mcdonagh

Watch our short video highlighting all our expertise and services here:

more than 10 y...

From £87,192

Last active Oct 26
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Gb construction

Gani Bush

Gb construction are here to help customers who need an Extension Builder in Croydon. We offer a competitive rate to complete all your extension bu...

From £88,200

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Banga Decoration

Sebastian Banga

Member since August 2025

Banga decoration. Is Base in south London  for number of year  Banga decoration is a small  company. Wich provide an excellent job to the custom...

From £87,344

Last active Oct 26
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Glenn Miller Builders Limited

Glenn Miller

Relax... you have found a reliable extension builder in Croydon. Glenn Miller Builders Limited is a friendly and reliable company based in Croydon ...

From £87,088

Last active Sep 26
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L M G Building Services (London) Ltd

Relax... you have found a reliable extension builder in Croydon. L M G Building Services (London) Ltd is a friendly and reliable company based in C...

From £87,296

Last active Sep 26
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Aviemore Building Contractors Ltd

Experienced extension builder ready to quote for your work. Aviemore Building Contractors Ltd is the best extension builder in Croydon. No obligati...

From £86,952

Last active Sep 26
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QC11 LTD

Vas OPetrov

QC11 LTD are here to help customers who need an Extension Builder in Croydon. We offer a competitive rate to complete all your extension buildering...

From £86,896

Last active Sep 26
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SMC Property Maintenance

Location

Croydon, CR0

Relax... you have found a reliable extension builder in Croydon. SMC Property Maintenance is a friendly and reliable company based in Croydon who c...

From £86,568

Last active Sep 26
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Oaksure Construction

Stuart Bogazzi

Working as a builder for over 20 years now.

Family run business 

Can sort any problem out and help build your dreams.

From £87,256

Last active Sep 26
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Bhagtana & Co Construction

Location

Croydon, CR0

Experienced extension builder ready to quote for your work. Bhagtana & Co Construction is the best extension builder in Croydon. No obligation free...

Granny Annexe Cost in Croydon

Estimates for granny annexe near Croydon

Building a granny annexe ranges from £86,568 (Oaksure Construction based in CR0) to £88,200 (Banga Decoration based in CR7), 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 Croydon by posting a job with HaMuch. We will send it to extension builders in Croydon who will be happy to help you.


Estimates for common extension builder jobs in Croydon;

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...