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P R Building is a trusted extension builder serving customers in Hornsey and the surrounding area. Contact us to today to get a competitive quote f...
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...
Experienced extension builder ready to quote for your work. Five Star Builder is the best extension builder in Hornsey. No obligation free quotes a...
Dimitar Vakavliev
We are reliable tradesmen delivering quality works with attention to detail
Need the extension buildering job done quickly without breaking the bank? WT Construction Service Ltd offer fast, reliable, and affordable extensio...
Relax... you have found a reliable extension builder in Hornsey. London Trowel Co. is a friendly and reliable company based in Hornsey who consider...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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 is a trusted extension builder serving customers in Hornsey and the surrounding area. Contact us to today to get a competitive ...
Andreas Thomas Demetri is a trusted extension builder serving customers in Hornsey and the surrounding area. Contact us to today to get a competiti...

Garden offices range from the cheapest of £9,528 (Bellator Construction Ltd based in N11) to the dearest of £10,400 (Five Star Builder based in N16), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in Hornsey by posting a job with HaMuch. We'll send it to extension builders 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 - £17,641

Two storey extension - £88,211

Build a timber frame extension - £26,141

Build a swimming pool - £81,141

Single storey extension - £57,816

Side return extension - £43,084

Install an RSJ - £2,341

Outbuilding - £10,141

Build a Mansard loft conversion - £52,141

Loft conversion - £35,070

Build a kitchen extension - £42,141

Hip to gable loft conversion - £42,141

Granny annexe - £87,141

Garden office - £10,141

Convert a Garage - £16,141

Garage - £18,641

Build a flat roof extension - £22,141

Build a dormer loft conversion - £42,141

Concrete foundations - £6,391

Convert a bungalow loft - £29,141

Convert a basement - £39,084