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Select your affordable E1 extension builder
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
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
Trusted and professional extension builder in E1. Experienced in all extension buildering work and keeping within budget and on quote. Thermodynami...
Experienced extension builder ready to quote for your work. Glenward Builders Ltd is the best extension builder in E1. No obligation free quotes an...
GS Fabric Ltd is an established and experienced local extension builder in E1. Please contact us for a free, no obligation quote and competitive ra...
Daniel Dixon
Need to find an Extension Builder near you for all your extension buildering work?
Renobuild Group provides a local, trusted extension buil...
Trusted and professional extension builder in E1. Experienced in all extension buildering work and keeping within budget and on quote. ROOSE CONSTR...
Andy Tunmer Building Services is an established and experienced local extension builder in E1. Please contact us for a free, no obligation quote an...
Relax... you have found a reliable extension builder in E1. Carbin Canopy is a friendly and reliable company based in E1 who consider no job as too...
Trusted and professional extension builder in E1. Experienced in all extension buildering work and keeping within budget and on quote. AB Building ...

Garden offices range from the cheapest of £9,928 (GS Fabric Ltd based in E2) to the dearest of £10,320 (Renobuild Group based in E1), 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 E1 by posting a job with HaMuch. We'll send it to extension builders in E1.
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 - £17,674

Two storey extension - £88,262

Build a timber frame extension - £26,174

Build a swimming pool - £81,174

Single storey extension - £58,488

Side return extension - £43,462

Install an RSJ - £2,374

Outbuilding - £10,174

Build a Mansard loft conversion - £52,174

Loft conversion - £35,385

Build a kitchen extension - £42,174

Hip to gable loft conversion - £42,174

Granny annexe - £87,174

Garden office - £10,174

Convert a Garage - £16,174

Garage - £18,674

Build a flat roof extension - £22,174

Build a dormer loft conversion - £42,174

Concrete foundations - £6,424

Convert a bungalow loft - £29,174

Convert a basement - £39,462