From £52,056
Surrey, TW18
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £52,096
We have over 15 years of experience in the building trade. We are a small family run business and pride ourselves on our exceptional customer servi...
From £52,232
Angus, TW18
Need an Extension Builder in TW18? ABCXYZ has been helping local clients (10 mile radius) with their extension buildering jobs for many years. Get ...
From £52,296
Experienced extension builder ready to quote for your work. Surrey Property Renovations Ltd is the best extension builder in TW18. No obligation fr...
From £52,080
General Builders is an established and experienced local extension builder in TW18. Please contact us for a free, no obligation quote and competiti...
From £52,400
Need to find an Extension Builder near you for all your extension buildering work?
AMG Construction Services provides a local, trusted exte...
From £52,464
Kandy Build and Construction Ltd is an established extension buildering business in TW18. We come highly recommended and provide competitive quotes...
From £51,728
At VEM Insulation Limited, we specialize in providing top-tier construction services including Exterior and interior Insulation, Plumbing and Drain...
From £52,016
We offer a wide range of building services to meet every type of projects.- Bathroom renovation- Kitchen refurbishment- Home extensions / conservat...
From £52,248
Relax... you have found a reliable extension builder in TW18. Bizy Construction Ltd is a friendly and reliable company based in TW18 who consider n...

Mansard loft conversions range from the cheapest installation of £51,728 (VEM INSULATION LIMITED based in tw19) to the dearest of around £52,464 (Kandy Build and Construction Ltd based in TW20).
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 TW18 by posting a job with HaMuch and we'll send it to extension builders in TW18.
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 - £17,662

Two storey extension - £88,242

Build a timber frame extension - £26,162

Build a swimming pool - £81,162

Single storey extension - £58,232

Side return extension - £43,318

Install an RSJ - £2,362

Outbuilding - £10,162

Build a Mansard loft conversion - £52,162

Loft conversion - £35,265

Build a kitchen extension - £42,162

Hip to gable loft conversion - £42,162

Granny annexe - £87,162

Garden office - £10,162

Convert a Garage - £16,162

Garage - £18,662

Build a flat roof extension - £22,162

Build a dormer loft conversion - £42,162

Concrete foundations - £6,412

Convert a bungalow loft - £29,162

Convert a basement - £39,318