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J&S WALLINGTON LIMITED
We provide our clients with excellent service and quality. Whether you are looking to extend or upgrade, our professional team has the skills and e...
Saintflexs
Julian Cafun
Need an Extension Builder in Greater London? Saintflexs has been helping local clients (10 mile radius) with their extension buildering jobs for m...
Our Builders Ltd
Max Dixon
We are a construction company specialising in all aspects of building works, loft construction Extension complete home renovation, structural ...
Cre8tive Contractors Ltd
Cre8tive Contractors Ltd are here to help customers who need an Extension Builder in Greater London. We offer a competitive rate to complete all yo...
L M G Building Services (London) Ltd
Relax... you have found a reliable extension builder in Greater London. L M G Building Services (London) Ltd is a friendly and reliable company bas...
AAB Tile Installation & Repairs
AAB Tile Installation & Repairs are here to help customers who need an Extension Builder in Greater London. We offer a competitive rate to complete...
QUANTIC BUILDING SERVICES LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Rapid Bee Ltd
Rapid Bee Ltd is an established extension buildering business in Greater London. We come highly recommended and provide competitive quotes for your...
Aumosa Ltd
Experienced extension builder ready to quote for your work. Aumosa Ltd is the best extension builder in Greater London. No obligation free quotes a...
HA.ME.RA Building & Decoration
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Extension builder estimates (based on hourly rates) to build a single storey extension in Greater London
- How much does a single storey extension cost?
- Single storey extension cost calculator
- What size single storey extension can I build without planning permission?
- Do I need an architect for an extension?
- How deep do foundations need to be for a single storey extension?
- Is it cheaper to have an extension or a conservatory?
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Estimates for common extension builder jobs in Greater London;
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 - £17,679
Two storey extension - £88,269
Build a timber frame extension - £26,179
Build a swimming pool - £81,179
Single storey extension - £58,584
Side return extension - £43,516
Install an RSJ - £2,379
Outbuilding - £10,179
Build a Mansard loft conversion - £52,179
Loft conversion - £35,430
Build a kitchen extension - £42,179
Hip to gable loft conversion - £42,179
Granny annexe - £87,179
Garden office - £10,179
Convert a Garage - £16,179
Garage - £18,679
Build a flat roof extension - £22,179
Build a dormer loft conversion - £42,179
Concrete foundations - £6,429
Convert a bungalow loft - £29,179
Convert a basement - £39,516