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Andy Harris
Andy Harris Construction is an established and experienced local extension builder in Mortlake. Please contact us for a free, no obligation quote a...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Building Vision London Ltd is a trusted extension builder serving customers in Mortlake and the surrounding area. Contact us to today to get a comp...
Red Box are a Fulham-based building and decorating business who work in West and Southwest London, and who specialise in fine interior renovations,...
Need to find an Extension Builder near you for all your extension buildering work?
AJ Wells provides a local, trusted extension buildering ...
AG-Renovation Ltd is a trusted extension builder serving customers in Mortlake and the surrounding area. Contact us to today to get a competitive q...
At Ferdas Design & Build Ltd we have been fitting bespoke bathrooms since 2013. We pride ourselves on being the go-to bathroom fitters for discerni...
Tomasz Pedowicz
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...
Elite Construction London Ltd
Elite Construction London Ltd has been one of the top providers of building and remodeling services in London for more than ten years.Our goal is ...
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 £51,904 (Elite Construction London Ltd based in TW8) to the dearest of around £52,504 (Ferdas Design & Build Ltd based in W3).
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 Mortlake by posting a job with HaMuch and we'll send it to extension builders in Mortlake.
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 - £17,753

Two storey extension - £88,379

Build a timber frame extension - £26,253

Build a swimming pool - £81,253

Single storey extension - £60,056

Side return extension - £44,344

Install an RSJ - £2,453

Outbuilding - £10,253

Build a Mansard loft conversion - £52,253

Loft conversion - £36,120

Build a kitchen extension - £42,253

Hip to gable loft conversion - £42,253

Granny annexe - £87,253

Garden office - £10,253

Convert a Garage - £16,253

Garage - £18,753

Build a flat roof extension - £22,253

Build a dormer loft conversion - £42,253

Concrete foundations - £6,503

Convert a bungalow loft - £29,253

Convert a basement - £40,344