From £52,032
P & I Construction is an established extension buildering business in Gants Hill. We come highly recommended and provide competitive quotes for you...
From £51,984
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £52,216
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £52,080
REMMY BUILDERS is an established extension buildering business in Gants Hill. We come highly recommended and provide competitive quotes for your wo...
From £51,968
Britbuild Direct is an established and experienced local extension builder in Gants Hill. Please contact us for a free, no obligation quote and com...
From £52,208
We are a British construction company with over 30 years experience in both commercial and residential building work. As a one-stop-shop, we provid...
From £52,032
M & S Builders is a trusted extension builder serving customers in Gants Hill and the surrounding area. Contact us to today to get a competitive qu...
From £52,280
Need an Extension Builder in Gants Hill? Sirha Builders has been helping local clients (10 mile radius) with their extension buildering jobs for ma...
From £52,152
Need to find an Extension Builder near you for all your extension buildering work?
BENNING CONSTRUCTION LIMITED provides a local, trusted e...
From £51,936
Slade Building and Construction Ltd is an established extension buildering business in Gants Hill. We come highly recommended and provide competiti...

Mansard loft conversions range from the cheapest installation of £51,936 (Slade Building and Construction Ltd based in IG6) to the dearest of around £52,280 (Sirha Builders based in IG2).
While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.
Get quotes to install a mansard loft conversion in Gants Hill by posting a job with HaMuch and we'll send it to extension builders in Gants Hill.
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 - £17,589

Two storey extension - £88,133

Build a timber frame extension - £26,089

Build a swimming pool - £81,089

Single storey extension - £56,776

Side return extension - £42,499

Install an RSJ - £2,289

Outbuilding - £10,089

Build a Mansard loft conversion - £52,089

Loft conversion - £34,583

Build a kitchen extension - £42,089

Hip to gable loft conversion - £42,089

Granny annexe - £87,089

Garden office - £10,089

Convert a Garage - £16,089

Garage - £18,589

Build a flat roof extension - £22,089

Build a dormer loft conversion - £42,089

Concrete foundations - £6,339

Convert a bungalow loft - £29,089

Convert a basement - £38,499