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JK Doors is a trusted extension builder serving customers in Bermondsey and the surrounding area. Contact us to today to get a competitive quote fo...
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 Bermondsey? Exquisite Design & Build Ltd has been helping local clients (5 mile radius) with their extension builderin...
Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in Bermondsey. No obligation ...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Bermondsey and the surrounding area. Contact us to today to ...
A to Z Builders Ltd are here to help customers who need an Extension Builder in Bermondsey. We offer a competitive rate to complete all your extens...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in Bermondsey. No obligation fr...
GS Fabric Ltd is an established and experienced local extension builder in Bermondsey. Please contact us for a free, no obligation quote and compet...
JM Building Services is a trusted extension builder serving customers in Bermondsey and the surrounding area. Contact us to today to get a competit...
Trusted and professional extension builder in Bermondsey. Experienced in all extension buildering work and keeping within budget and on quote. Vida...

In Bermondsey, 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 Bermondsey. 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 - £17,665

Two storey extension - £88,247

Build a timber frame extension - £26,165

Build a swimming pool - £81,165

Single storey extension - £58,296

Side return extension - £43,354

Install an RSJ - £2,365

Outbuilding - £10,165

Build a Mansard loft conversion - £52,165

Loft conversion - £35,295

Build a kitchen extension - £42,165

Hip to gable loft conversion - £42,165

Granny annexe - £87,165

Garden office - £10,165

Convert a Garage - £16,165

Garage - £18,665

Build a flat roof extension - £22,165

Build a dormer loft conversion - £42,165

Concrete foundations - £6,415

Convert a bungalow loft - £29,165

Convert a basement - £39,354