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SJ Expert Building Services
SJ Expert Building Services are here to help customers who need an Extension Builder in N11. We offer a competitive rate to complete all your exten...
Bellator Construction Ltd
Dimitar Vakavliev
We are reliable tradesmen delivering quality works with attention to detail
WT Construction Service Ltd
Friern Barnet, N11
Need the extension buildering job done quickly without breaking the bank? WT Construction Service Ltd offer fast, reliable, and affordable extensio...
Pavillion Building Services
Relax... you have found a reliable extension builder in N11. Pavillion Building Services is a friendly and reliable company based in N11 who consid...
Onyx Iv
Ivaylo Shkodrov
London, N11
Extremely reliable service . Flexibility, correct, listening customer. Wide experience.
Raf's Building Service
Need to find an Extension Builder near you for all your extension buildering work?
Raf's Building Service provides a local, trusted extensi...
Elmfield Property Services
Need to find an Extension Builder near you for all your extension buildering work?
Elmfield Property Services provides a local, trusted ext...
Odp Builders
Need an Extension Builder in N11? Odp Builders has been helping local clients (5 mile radius) with their extension buildering jobs for many years. ...
A K Decoration & Building Serv
Need an Extension Builder in N11? A K Decoration & Building Serv has been helping local clients (5 mile radius) with their extension buildering job...
Homeworks Design & Build Ltd
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Flat roof extension cost in N11
A flat roof extension ranges from the cheapest of £21,320 (Onyx Iv based in N11) to the dearest of £22,584 (Homeworks Design & Build Ltd based in N20), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in N11 by posting a job with HaMuch. We'll send it to extension builders in N11.
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- Flat roof extension cost per m2
- Factors affecting the cost of flat roof extensions
- Advantages and disadvantages of flat roofs
- Which is cheaper: a flat roof or pitched roof?
- How long does a flat roof extension take?
- Do you need planning permission for a flat roof extension?
- How long does a flat roof last?
- Can you walk on a flat roof extension?
- What insulation do I need for a flat roof extension?
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Estimates for common extension builder jobs in N11;
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 - £17,570
Two storey extension - £88,104
Build a timber frame extension - £26,070
Build a swimming pool - £81,070
Single storey extension - £56,392
Side return extension - £42,283
Install an RSJ - £2,270
Outbuilding - £10,070
Build a Mansard loft conversion - £52,070
Loft conversion - £34,403
Build a kitchen extension - £42,070
Hip to gable loft conversion - £42,070
Granny annexe - £87,070
Garden office - £10,070
Convert a Garage - £16,070
Garage - £18,570
Build a flat roof extension - £22,070
Build a dormer loft conversion - £42,070
Concrete foundations - £6,320
Convert a bungalow loft - £29,070
Convert a basement - £38,283