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JK Doors is a trusted extension builder serving customers in Cannon Street and the surrounding area. Contact us to today to get a competitive quote...
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
Need an Extension Builder in Cannon Street? Exquisite Design & Build Ltd has been helping local clients (5 mile radius) with their extension builde...
Trusted and professional extension builder in Cannon Street. Experienced in all extension buildering work and keeping within budget and on quote. T...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Cannon Street and the surrounding area. Contact us to today ...
A to Z Builders Ltd are here to help customers who need an Extension Builder in Cannon Street. We offer a competitive rate to complete all your ext...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in Cannon Street. No obligation...
GS Fabric Ltd is an established and experienced local extension builder in Cannon Street. Please contact us for a free, no obligation quote and com...
JM Building Services is a trusted extension builder serving customers in Cannon Street and the surrounding area. Contact us to today to get a compe...
DUWIX BUILDING MAINTENANCE are here to help customers who need an Extension Builder in Cannon Street. We offer a competitive rate to complete all y...

In Cannon Street, prices for dormer loft conversions range from £41,928 (GS Fabric Ltd based in E2) to £42,376 (Exquisite Design & Build Ltd based in SE16), but how much your conversion costs will vary depending on the size of your property, how easy access to your roof is and what you want to use the space for.
The best way to get an accurate price is to compare quotes from extension builders in Cannon Street. Post your job on HaMuch now and we'll put you in touch with available extension builders.
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 - £17,658

Two storey extension - £88,238

Build a timber frame extension - £26,158

Build a swimming pool - £81,158

Single storey extension - £58,168

Side return extension - £43,282

Install an RSJ - £2,358

Outbuilding - £10,158

Build a Mansard loft conversion - £52,158

Loft conversion - £35,235

Build a kitchen extension - £42,158

Hip to gable loft conversion - £42,158

Granny annexe - £87,158

Garden office - £10,158

Convert a Garage - £16,158

Garage - £18,658

Build a flat roof extension - £22,158

Build a dormer loft conversion - £42,158

Concrete foundations - £6,408

Convert a bungalow loft - £29,158

Convert a basement - £39,282