From £52,048
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in E11. No obligation free quotes ...
From £52,424
Nouvell Decor is a trusted extension builder serving customers in E11 and the surrounding area. Contact us to today to get a competitive quote for ...
From £53,616
Over 20 years experience
Client focussed and driven
Personal planning and completion of work
Warranty ...
From £52,112
Trusted and professional extension builder in E11. Experienced in all extension buildering work and keeping within budget and on quote. D Dan Const...
From £52,424
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £52,144
ABC Building & Maintenance Contractors Ltd is a trusted extension builder serving customers in E11 and the surrounding area. Contact us to today to...
From £52,184
Experienced extension builder ready to quote for your work. DIAL 1ST CONSTRUCTION LTD is the best extension builder in E11. No obligation free quot...
From £52,432
Krystian Wojasiewicz is a trusted extension builder serving customers in E11 and the surrounding area. Contact us to today to get a competitive quo...
From £52,160
Trusted and professional extension builder in E11. Experienced in all extension buildering work and keeping within budget and on quote. PARKWAY MAI...
From £52,248
C & A Contractors is a trusted extension builder serving customers in E11 and the surrounding area. Contact us to today to get a competitive quote ...

Mansard loft conversions range from the cheapest installation of £52,048 (J&J Building Solutions based in SW16) to the dearest of around £53,616 (GasHeat based in NW10).
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 E11 by posting a job with HaMuch and we'll send it to extension builders in E11.
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 - £17,879

Two storey extension - £88,569

Build a timber frame extension - £26,379

Build a swimming pool - £81,379

Single storey extension - £62,584

Side return extension - £45,766

Install an RSJ - £2,579

Outbuilding - £10,379

Build a Mansard loft conversion - £52,379

Loft conversion - £37,305

Build a kitchen extension - £42,379

Hip to gable loft conversion - £42,379

Granny annexe - £87,379

Garden office - £10,379

Convert a Garage - £16,379

Garage - £18,879

Build a flat roof extension - £22,379

Build a dormer loft conversion - £42,379

Concrete foundations - £6,629

Convert a bungalow loft - £29,379

Convert a basement - £41,766