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SJ Expert Building Services
SJ Expert Building Services are here to help customers who need an Extension Builder in Hornsey. We offer a competitive rate to complete all your e...
Five Star Builder
Experienced extension builder ready to quote for your work. Five Star Builder is the best extension builder in Hornsey. No obligation free quotes a...
Bellator Construction Ltd
Dimitar Vakavliev
We are reliable tradesmen delivering quality works with attention to detail
WT Construction Service Ltd
Need the extension buildering job done quickly without breaking the bank? WT Construction Service Ltd offer fast, reliable, and affordable extensio...
London Trowel Co.
Relax... you have found a reliable extension builder in Hornsey. London Trowel Co. is a friendly and reliable company based in Hornsey who consider...
Best Builders
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
First guard Roofing
Darren Bergin
Relax... you have found a reliable extension builder in Hornsey. First guard Roofing is a friendly and reliable company based in Hornsey who consid...
GG CONSTRUCTION LTD
GG CONSTRUCTION LTD is a trusted extension builder serving customers in Hornsey and the surrounding area. Contact us to today to get a competitive ...
Andreas Thomas Demetri
Andreas Thomas Demetri is a trusted extension builder serving customers in Hornsey and the surrounding area. Contact us to today to get a competiti...
Onyx Iv
Ivaylo Shkodrov
Extremely reliable service . Flexibility, correct, listening customer. Wide experience.
Flat roof extension cost in Hornsey
A flat roof extension ranges from the cheapest of £21,320 (Onyx Iv based in N11) to the dearest of £22,400 (Five Star Builder based in N16), 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 Hornsey by posting a job with HaMuch. We'll send it to extension builders in Hornsey.
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Estimates for common extension builder jobs in Hornsey;
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 - £17,547
Two storey extension - £88,071
Build a timber frame extension - £26,047
Build a swimming pool - £81,047
Single storey extension - £55,944
Side return extension - £42,031
Install an RSJ - £2,247
Outbuilding - £10,047
Build a Mansard loft conversion - £52,047
Loft conversion - £34,193
Build a kitchen extension - £42,047
Hip to gable loft conversion - £42,047
Granny annexe - £87,047
Garden office - £10,047
Convert a Garage - £16,047
Garage - £18,547
Build a flat roof extension - £22,047
Build a dormer loft conversion - £42,047
Concrete foundations - £6,297
Convert a bungalow loft - £29,047
Convert a basement - £38,031