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 the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
CK Constructions & Development Ltd is a trusted extension builder serving customers in EC4V and the surrounding area. Contact us to today to get a ...
A to Z Builders Ltd are here to help customers who need an Extension Builder in EC4V. We offer a competitive rate to complete all your extension bu...
JK Doors is a trusted extension builder serving customers in EC4V and the surrounding area. Contact us to today to get a competitive quote for exte...
GS Fabric Ltd is an established and experienced local extension builder in EC4V. Please contact us for a free, no obligation quote and competitive ...
JM Building Services is a trusted extension builder serving customers in EC4V and the surrounding area. Contact us to today to get a competitive qu...
Buildwiser is a trusted extension builder serving customers in EC4V and the surrounding area. Contact us to today to get a competitive quote for ex...
F & F Building Services is an established extension buildering business in EC4V. We come highly recommended and provide competitive quotes for your...
AAA Design Decorators are here to help customers who need an Extension Builder in EC4V. We offer a competitive rate to complete all your extension ...

Costs range from £87,892 (GS Fabric Ltd based in E2) to £88,636 (AAA Design Decorators based in SE17), 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 - £17,642

Two storey extension - £88,212

Build a timber frame extension - £26,142

Build a swimming pool - £81,142

Single storey extension - £57,832

Side return extension - £43,093

Install an RSJ - £2,342

Outbuilding - £10,142

Build a Mansard loft conversion - £52,142

Loft conversion - £35,078

Build a kitchen extension - £42,142

Hip to gable loft conversion - £42,142

Granny annexe - £87,142

Garden office - £10,142

Convert a Garage - £16,142

Garage - £18,642

Build a flat roof extension - £22,142

Build a dormer loft conversion - £42,142

Concrete foundations - £6,392

Convert a bungalow loft - £29,142

Convert a basement - £39,093