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J&J Building Solutions
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in CR7. No obligation free quotes ...
From £88,200
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...
Greens Gardening & Landscape Property Maintenance
John Mcdonagh
Watch our short video highlighting all our expertise and services here:
more than 10 y...
RAJANIS CONSTRUCTION
Relax... you have found a reliable extension builder in CR7. RAJANIS CONSTRUCTION is a friendly and reliable company based in CR7 who consider no j...
PROBUILDER
PROBUILDER is a trusted extension builder serving customers in CR7 and the surrounding area. Contact us to today to get a competitive quote for ext...
K S BUILDERS (UK) LTD
Trusted and professional extension builder in CR7. Experienced in all extension buildering work and keeping within budget and on quote. K S BUILDER...
VDL Construction Ltd
Thornton Heath, CR7
Need to find an Extension Builder near you for all your extension buildering work?
VDL Construction Ltd provides a local, trusted extension...
Top Builders
Experienced extension builder ready to quote for your work. Top Builders is the best extension builder in CR7. No obligation free quotes and many h...
Howland Building Services
Need to find an Extension Builder near you for all your extension buildering work?
Howland Building Services provides a local, trusted exte...
A & P Master Construction
Experienced extension builder ready to quote for your work. A & P Master Construction is the best extension builder in CR7. No obligation free quot...
Granny Annexe Cost in CR7
Building a granny annexe ranges from £86,880 (PROBUILDER based in SW16) 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 CR7 by posting a job with HaMuch. We will send it to extension builders in CR7 who will be happy to help you.
- How much does a granny annexe cost to build in the UK?
- What is a granny annexe?
- How big can a granny annexe be?
- How to get planning permission for a granny annexe
- What is the granny annexe tax loophole?
- Does an annexe increase council tax?
- Do you need planning permission to convert a garage into a granny flat?
- Can you claim VAT back on a granny annexe?
- Can I let out my granny annexe?
- Does an annexe increase property value?
- Can a granny annexe be sold separately?
- Do you have to pay stamp duty on an annexe?
Get extension builder rates instantly
Estimates for common extension builder jobs in CR7;
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.
Underpin a building - £17,747
Two storey extension - £88,371
Build a timber frame extension - £26,247
Build a swimming pool - £81,247
Single storey extension - £59,944
Side return extension - £44,281
Install an RSJ - £2,447
Outbuilding - £10,247
Build a Mansard loft conversion - £52,247
Loft conversion - £36,068
Build a kitchen extension - £42,247
Hip to gable loft conversion - £42,247
Granny annexe - £87,247
Garden office - £10,247
Convert a Garage - £16,247
Garage - £18,747
Build a flat roof extension - £22,247
Build a dormer loft conversion - £42,247
Concrete foundations - £6,497
Convert a bungalow loft - £29,247
Convert a basement - £40,281