From £88,144
Omniform are here to help customers who need an Extension Builder in Cannon Street. We offer a competitive rate to complete all your extension buil...
From £88,432
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £88,708
Need an Extension Builder in Cannon Street? GenUp Digital has been helping local clients (5 mile radius) with their extension buildering jobs for m...
From £88,612
London Roof Gardens is a trusted extension builder serving customers in Cannon Street and the surrounding area. Contact us to today to get a compet...
From £88,384
Need an Extension Builder in Cannon Street? Flow Property Services has been helping local clients (5 mile radius) with their extension buildering j...
From £88,408
Need an Extension Builder in Cannon Street? Aylaa Exclusive has been helping local clients (5 mile radius) with their extension buildering jobs for...
From £87,988
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £88,588
We have the experience and knowledge to carry out any project, big or small. Our team of experts thoroughly plan the budget and manage your projec...
From £88,300
Experienced extension builder ready to quote for your work. Space Design Construction Services Ltd is the best extension builder in Cannon Street. ...
From £88,156
SCANDIIN is an established and experienced local extension builder in Cannon Street. Please contact us for a free, no obligation quote and competit...

Costs range from £87,988 (SDL PKB based in Ec4a) to £88,708 (GenUp Digital based in EC3M), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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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 - £17,748

Two storey extension - £88,372

Build a timber frame extension - £26,248

Build a swimming pool - £81,248

Single storey extension - £59,960

Side return extension - £44,290

Install an RSJ - £2,448

Outbuilding - £10,248

Build a Mansard loft conversion - £52,248

Loft conversion - £36,075

Build a kitchen extension - £42,248

Hip to gable loft conversion - £42,248

Granny annexe - £87,248

Garden office - £10,248

Convert a Garage - £16,248

Garage - £18,748

Build a flat roof extension - £22,248

Build a dormer loft conversion - £42,248

Concrete foundations - £6,498

Convert a bungalow loft - £29,248

Convert a basement - £40,290