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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...
SLS BUILDERS LIMITED is a trusted extension builder serving customers in High Holborn and the surrounding area. Contact us to today to get a compet...
Trusted and professional extension builder in High Holborn. Experienced in all extension buildering work and keeping within budget and on quote. Th...
Darren Bergin
Relax... you have found a reliable extension builder in High Holborn. First guard Roofing is a friendly and reliable company based in High Holborn ...
CK Constructions & Development Ltd is a trusted extension builder serving customers in High Holborn and the surrounding area. Contact us to today t...
A to Z Builders Ltd are here to help customers who need an Extension Builder in High Holborn. We offer a competitive rate to complete all your exte...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in High Holborn. No obligation ...
JK Doors is a trusted extension builder serving customers in High Holborn and the surrounding area. Contact us to today to get a competitive quote ...
GS Fabric Ltd is an established and experienced local extension builder in High Holborn. Please contact us for a free, no obligation quote and comp...

Outbuilding costs in High Holborn range from the cheapest of £9,928 (GS Fabric Ltd based in E2) to the dearest of £10,376 (CK Constructions & Development Ltd based in WC1N), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in High Holborn by posting a job with HaMuch and we will send it to 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 - £17,610

Two storey extension - £88,164

Build a timber frame extension - £26,110

Build a swimming pool - £81,110

Single storey extension - £57,192

Side return extension - £42,733

Install an RSJ - £2,310

Outbuilding - £10,110

Build a Mansard loft conversion - £52,110

Loft conversion - £34,778

Build a kitchen extension - £42,110

Hip to gable loft conversion - £42,110

Granny annexe - £87,110

Garden office - £10,110

Convert a Garage - £16,110

Garage - £18,610

Build a flat roof extension - £22,110

Build a dormer loft conversion - £42,110

Concrete foundations - £6,360

Convert a bungalow loft - £29,110

Convert a basement - £38,733