From £51,960
Greater London, N17
Need to find an Extension Builder near you for all your extension buildering work?
Nicky Price provides a local, trusted extension builderi...
From £52,240
JMP Contractors & Engineers are here to help customers who need an Extension Builder in N17. We offer a competitive rate to complete all your exten...
From £52,200
Londonderry, N17
Experienced extension builder ready to quote for your work. R&S services Ltd is the best extension builder in N17. No obligation free quotes and ma...
From £52,128
GG CONSTRUCTION LTD is a trusted extension builder serving customers in N17 and the surrounding area. Contact us to today to get a competitive quot...
From £52,256
Greater London, N17
We are an architecture basis refurbishment company. We do not offer our clients just a designed spaces, we offer them living areas. However, The ch...
From £51,968
Painting and decorating, plastering, kitchen and bathroom renovation extension roofing etc
From £52,168
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £52,392
PS Contractors is an established and experienced local extension builder in N17. Please contact us for a free, no obligation quote and competitive ...
From £52,256
Tottenham, N17
KJV CONSTRUCTION LTD is an established and experienced local extension builder in N17. Please contact us for a free, no obligation quote and compet...

Mansard loft conversions range from the cheapest installation of £51,600 (ADD CONSTRUCTION (LONDON) LTD based in N15) to the dearest of around £52,392 (PS Contractors based in N17).
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 N17 by posting a job with HaMuch and we'll send it to extension builders in N17.
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 - £17,617

Two storey extension - £88,175

Build a timber frame extension - £26,117

Build a swimming pool - £81,117

Single storey extension - £57,336

Side return extension - £42,814

Install an RSJ - £2,317

Outbuilding - £10,117

Build a Mansard loft conversion - £52,117

Loft conversion - £34,845

Build a kitchen extension - £42,117

Hip to gable loft conversion - £42,117

Granny annexe - £87,117

Garden office - £10,117

Convert a Garage - £16,117

Garage - £18,617

Build a flat roof extension - £22,117

Build a dormer loft conversion - £42,117

Concrete foundations - £6,367

Convert a bungalow loft - £29,117

Convert a basement - £38,814