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JK Doors is a trusted extension builder serving customers in Islington and the surrounding area. Contact us to today to get a competitive quote for...
Torrington Design
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
Mick Singh
At Building Services Contractors we pride ourselves on an efficient and friendly service, and strive to achieve 100% customer satisfaction.
SLS BUILDERS LIMITED is a trusted extension builder serving customers in Islington and the surrounding area. Contact us to today to get a competiti...
Experienced extension builder ready to quote for your work. Five Star Builder is the best extension builder in Islington. No obligation free quotes...
Relax... you have found a reliable extension builder in Islington. London Trowel Co. is a friendly and reliable company based in Islington who cons...
Trusted and professional extension builder in Islington. Experienced in all extension buildering work and keeping within budget and on quote. Therm...
Darren Bergin
Relax... you have found a reliable extension builder in Islington. First guard Roofing is a friendly and reliable company based in Islington who co...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Islington and the surrounding area. Contact us to today to g...
GS Fabric Ltd is an established and experienced local extension builder in Islington. Please contact us for a free, no obligation quote and competi...

A timber frame extension built in Islington typically ranges from £25,928 (GS Fabric Ltd based in E2) to £26,400 (Five Star Builder based in N16), but this will vary depending on the size of your extension, the design features you'd like and what your soil is like for the foundations.
Comparing extension builders estimates for building a timber frame extension gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build a timber frame extension in Islington by posting a job with HaMuch and we'll send it to extension builders in Islington.
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 - £17,669

Two storey extension - £88,253

Build a timber frame extension - £26,169

Build a swimming pool - £81,169

Single storey extension - £58,376

Side return extension - £43,399

Install an RSJ - £2,369

Outbuilding - £10,169

Build a Mansard loft conversion - £52,169

Loft conversion - £35,333

Build a kitchen extension - £42,169

Hip to gable loft conversion - £42,169

Granny annexe - £87,169

Garden office - £10,169

Convert a Garage - £16,169

Garage - £18,669

Build a flat roof extension - £22,169

Build a dormer loft conversion - £42,169

Concrete foundations - £6,419

Convert a bungalow loft - £29,169

Convert a basement - £39,399