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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 New Oxford Street and the surrounding area. Contact us to today to get a c...
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
Trusted and professional extension builder in New Oxford Street. Experienced in all extension buildering work and keeping within budget and on quot...
Jay Reid
Darren Bergin
Relax... you have found a reliable extension builder in New Oxford Street. First guard Roofing is a friendly and reliable company based in New Oxfo...
CK Constructions & Development Ltd is a trusted extension builder serving customers in New Oxford Street and the surrounding area. Contact us to to...
A to Z Builders Ltd are here to help customers who need an Extension Builder in New Oxford Street. We offer a competitive rate to complete all your...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in New Oxford Street. No obliga...
JK Doors is a trusted extension builder serving customers in New Oxford Street and the surrounding area. Contact us to today to get a competitive q...

Comparing extension builders estimates for a Convert a basement gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost to convert a basement in New Oxford Street by posting a job with HaMuch and we will send it to extension builders in New Oxford Street.
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 - £17,849

Two storey extension - £88,523

Build a timber frame extension - £26,349

Build a swimming pool - £81,349

Single storey extension - £61,976

Side return extension - £45,424

Install an RSJ - £2,549

Outbuilding - £10,349

Build a Mansard loft conversion - £52,349

Loft conversion - £37,020

Build a kitchen extension - £42,349

Hip to gable loft conversion - £42,349

Granny annexe - £87,349

Garden office - £10,349

Convert a Garage - £16,349

Garage - £18,849

Build a flat roof extension - £22,349

Build a dormer loft conversion - £42,349

Concrete foundations - £6,599

Convert a bungalow loft - £29,349

Convert a basement - £41,424