From £52,424
ARCHWAY DESIGN+BUILD LTD are here to help customers who need an Extension Builder in N6. We offer a competitive rate to complete all your extension...
From £52,048
Need an Extension Builder in N6? Avocado Sweets Design Studio has been helping local clients (5 mile radius) with their extension buildering jobs f...
From £52,128
RAM Build Construction Ltd is an established and experienced local extension builder in N6. Please contact us for a free, no obligation quote and c...
From £52,336
We make the adage ‘House is where the heart is’, a reality for the house-owners.We are an empathetic housebuilder that delivers elegance and du...
From £52,296
We pride ourselves on our ability to provide unmatched construction, renovation and refurbishment services to homeowners, designers and architects ...
From £51,888
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £52,192
SJ Expert Building Services are here to help customers who need an Extension Builder in N6. We offer a competitive rate to complete all your extens...
From £52,080
Trusted and professional extension builder in N6. Experienced in all extension buildering work and keeping within budget and on quote. Arundell Ass...
From £51,960
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Mansard loft conversions range from the cheapest installation of £51,888 (Warren House Construction Ltd based in N19) to the dearest of around £52,424 (ARCHWAY DESIGN+BUILD LTD based in N19).
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 N6 by posting a job with HaMuch and we'll send it to extension builders in N6.
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 - £17,664

Two storey extension - £88,246

Build a timber frame extension - £26,164

Build a swimming pool - £81,164

Single storey extension - £58,280

Side return extension - £43,345

Install an RSJ - £2,364

Outbuilding - £10,164

Build a Mansard loft conversion - £52,164

Loft conversion - £35,288

Build a kitchen extension - £42,164

Hip to gable loft conversion - £42,164

Granny annexe - £87,164

Garden office - £10,164

Convert a Garage - £16,164

Garage - £18,664

Build a flat roof extension - £22,164

Build a dormer loft conversion - £42,164

Concrete foundations - £6,414

Convert a bungalow loft - £29,164

Convert a basement - £39,345