From £52,376
Bromley, BR1
Need an Extension Builder in BR1? Saintflexs has been helping local clients (10 mile radius) with their extension buildering jobs for many years. ...
From £52,112
Pineapple Interiors is an established extension buildering business in BR1. We come highly recommended and provide competitive quotes for your work...
From £52,160
Kent, BR1
Nicholas James Construction is an established extension buildering business in BR1. We come highly recommended and provide competitive quotes for y...
From £52,160
Need to find an Extension Builder near you for all your extension buildering work?
Heritage Roofing and Building Solutions Ltd provides a l...
From £52,088
Bromley, BR1
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £52,376
Travel London Ltd is an established and experienced local extension builder in BR1. Please contact us for a free, no obligation quote and competiti...
From £52,296
AAB Tile Installation & Repairs are here to help customers who need an Extension Builder in BR1. We offer a competitive rate to complete all your e...
From £52,320
Relax... you have found a reliable extension builder in BR1. PROBUILD (SE) LTD is a friendly and reliable company based in BR1 who consider no job ...
From £51,456
Highly dedicated company to deliver exceptional customer service
From £52,128
Relax... you have found a reliable extension builder in BR1. Upwards and Outwards is a friendly and reliable company based in BR1 who consider no j...

Mansard loft conversions range from the cheapest installation of £51,456 (London Quality Construction Group Limited based in BR2) to the dearest of around £52,376 (Saintflexs based in BR1).
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 BR1 by posting a job with HaMuch and we'll send it to extension builders in BR1.
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 - £17,647

Two storey extension - £88,221

Build a timber frame extension - £26,147

Build a swimming pool - £81,147

Single storey extension - £57,944

Side return extension - £43,156

Install an RSJ - £2,347

Outbuilding - £10,147

Build a Mansard loft conversion - £52,147

Loft conversion - £35,130

Build a kitchen extension - £42,147

Hip to gable loft conversion - £42,147

Granny annexe - £87,147

Garden office - £10,147

Convert a Garage - £16,147

Garage - £18,647

Build a flat roof extension - £22,147

Build a dormer loft conversion - £42,147

Concrete foundations - £6,397

Convert a bungalow loft - £29,147

Convert a basement - £39,156