From £52,504
We are a local, small London business moving from B2B to B2C Construction Design & Build Market
From £52,488
Welcome to Novo Solutions Group Ltd - Your premier building construction and renovation specialists. Based in the UK, Novo Solutions Group...
From £52,400
Open Space London are here to help customers who need an Extension Builder in Primrose Hill. We offer a competitive rate to complete all your exten...
From £51,984
Superior Project Ltd delivers a wide range of services related to construction and renovation. We list just a selection here.House ExtensionsFull ...
From £52,256
Kigumi ltd is an established and experienced local extension builder in Primrose Hill. Please contact us for a free, no obligation quote and compet...
From £52,096
We specialize in private and commercial residential construction and operate as a general contracting and full-service project management company w...
From £52,144
BUILD SPACE is an established extension buildering business in Primrose Hill. We come highly recommended and provide competitive quotes for your wo...
From £51,904
Relax... you have found a reliable extension builder in Primrose Hill. BDCM Design & Build is a friendly and reliable company based in Primrose Hil...
From £52,232
Hampstead Design Hub are here to help customers who need an Extension Builder in Primrose Hill. We offer a competitive rate to complete all your ex...
From £52,216
Our building services company RY Interior Ltd have six years’ experience of helping customers in London and the surrounding area by providing pro...

Mansard loft conversions range from the cheapest installation of £51,904 (BDCM Design & Build based in NW3) to the dearest of around £52,504 (AVmen Construction based in NW3).
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 Primrose Hill by posting a job with HaMuch and we'll send it to extension builders in Primrose 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 - £17,722

Two storey extension - £88,334

Build a timber frame extension - £26,222

Build a swimming pool - £81,222

Single storey extension - £59,448

Side return extension - £44,002

Install an RSJ - £2,422

Outbuilding - £10,222

Build a Mansard loft conversion - £52,222

Loft conversion - £35,835

Build a kitchen extension - £42,222

Hip to gable loft conversion - £42,222

Granny annexe - £87,222

Garden office - £10,222

Convert a Garage - £16,222

Garage - £18,722

Build a flat roof extension - £22,222

Build a dormer loft conversion - £42,222

Concrete foundations - £6,472

Convert a bungalow loft - £29,222

Convert a basement - £40,002