From £21,872
K H CONSTRUCTION are here to help customers who need an Extension Builder in Upminster. We offer a competitive rate to complete all your extension ...
From £22,152
Essex, RM14
Need an Extension Builder in Upminster? Lee Kyson Building Consultancy Ltd has been helping local clients (10 mile radius) with their extension bui...
From £22,008
Need an Extension Builder in Upminster? TOGA CONSTRUCTION LTD has been helping local clients (10 mile radius) with their extension buildering jobs ...
From £22,008
Upmins, RM14
Need to find an Extension Builder near you for all your extension buildering work?
Advanced Glazing Systems Ltd provides a local, trusted e...
From £21,824
Trusted and professional extension builder in Upminster. Experienced in all extension buildering work and keeping within budget and on quote. V&L C...
From £22,104
Need to find an Extension Builder near you for all your extension buildering work?
London Construction Team Ltd provides a local, trusted e...
From £22,008
Experienced extension builder ready to quote for your work. Casa building services Ltd is the best extension builder in Upminster. No obligation fr...
From £22,080
ESSEX TIMBER BUILDINGS LTD is an established extension buildering business in Upminster. We come highly recommended and provide competitive quotes ...
From £22,024
Phull Design & Build Ltd are here to help customers who need an Extension Builder in Upminster. We offer a competitive rate to complete all your ex...
From £21,952
TEB Builders Limited are here to help customers who need an Extension Builder in Upminster. We offer a competitive rate to complete all your exten...

A flat roof extension ranges from the cheapest of £21,824 (V&L Construction LTD based in rm14) to the dearest of £22,152 (Lee Kyson Building Consultancy Ltd based in RM14), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in Upminster by posting a job with HaMuch. We'll send it to extension builders in Upminster.
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 - £17,503

Two storey extension - £88,005

Build a timber frame extension - £26,003

Build a swimming pool - £81,003

Single storey extension - £55,064

Side return extension - £41,536

Install an RSJ - £2,203

Outbuilding - £10,003

Build a Mansard loft conversion - £52,003

Loft conversion - £33,780

Build a kitchen extension - £42,003

Hip to gable loft conversion - £42,003

Granny annexe - £87,003

Garden office - £10,003

Convert a Garage - £16,003

Garage - £18,503

Build a flat roof extension - £22,003

Build a dormer loft conversion - £42,003

Concrete foundations - £6,253

Convert a bungalow loft - £29,003

Convert a basement - £37,536