From £26,096
Omniform are here to help customers who need an Extension Builder in Mansion House. We offer a competitive rate to complete all your extension buil...
From £26,288
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £26,256
Need an Extension Builder in Mansion House? Flow Property Services has been helping local clients (5 mile radius) with their extension buildering j...
From £26,272
Need an Extension Builder in Mansion House? Aylaa Exclusive has been helping local clients (5 mile radius) with their extension buildering jobs for...
From £26,392
We have the experience and knowledge to carry out any project, big or small. Our team of experts thoroughly plan the budget and manage your projec...
From £26,408
London Roof Gardens is a trusted extension builder serving customers in Mansion House and the surrounding area. Contact us to today to get a compet...
From £25,992
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £26,104
SCANDIIN is an established and experienced local extension builder in Mansion House. Please contact us for a free, no obligation quote and competit...
From £26,472
Need an Extension Builder in Mansion House? GenUp Digital has been helping local clients (5 mile radius) with their extension buildering jobs for m...
From £26,160
Venta Construction is an established and experienced local extension builder in Mansion House. Please contact us for a free, no obligation quote an...

A timber frame extension built in Mansion House typically ranges from £25,992 (SDL PKB based in Ec4a) to £26,472 (GenUp Digital based in EC3M), but this will vary depending on the size of your extension, the design features you'd like and what your soil is like for the foundations.
Comparing extension builders estimates for building a timber frame extension 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 a timber frame extension in Mansion House by posting a job with HaMuch and we'll send it to extension builders in Mansion House.
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 - £17,744

Two storey extension - £88,366

Build a timber frame extension - £26,244

Build a swimming pool - £81,244

Single storey extension - £59,880

Side return extension - £44,245

Install an RSJ - £2,444

Outbuilding - £10,244

Build a Mansard loft conversion - £52,244

Loft conversion - £36,038

Build a kitchen extension - £42,244

Hip to gable loft conversion - £42,244

Granny annexe - £87,244

Garden office - £10,244

Convert a Garage - £16,244

Garage - £18,744

Build a flat roof extension - £22,244

Build a dormer loft conversion - £42,244

Concrete foundations - £6,494

Convert a bungalow loft - £29,244

Convert a basement - £40,245