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Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Patrick Gavin
Need an Extension Builder in Marleybone? NWL Renovations Ltd has been helping local clients (5 mile radius) with their extension buildering jobs f...
SLS BUILDERS LIMITED is a trusted extension builder serving customers in Marleybone and the surrounding area. Contact us to today to get a competit...
Relax... you have found a reliable extension builder in Marleybone. M & A UK Ltd is a friendly and reliable company based in Marleybone who conside...
Newpark Construction are here to help customers who need an Extension Builder in Marleybone. We offer a competitive rate to complete all your exten...
Darren Bergin
Relax... you have found a reliable extension builder in Marleybone. First guard Roofing is a friendly and reliable company based in Marleybone who ...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Marleybone and the surrounding area. Contact us to today to ...
A to Z Builders Ltd are here to help customers who need an Extension Builder in Marleybone. We offer a competitive rate to complete all your extens...
JK Doors is a trusted extension builder serving customers in Marleybone and the surrounding area. Contact us to today to get a competitive quote fo...
JM Building Services is a trusted extension builder serving customers in Marleybone and the surrounding area. Contact us to today to get a competit...

Mansard loft conversions range from the cheapest installation of £51,928 (BPS Building based in NW6) to the dearest of around £52,376 (CK Constructions & Development Ltd based in WC1N).
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 Marleybone by posting a job with HaMuch and we'll send it to extension builders in Marleybone.
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 - £17,604

Two storey extension - £88,156

Build a timber frame extension - £26,104

Build a swimming pool - £81,104

Single storey extension - £57,080

Side return extension - £42,670

Install an RSJ - £2,304

Outbuilding - £10,104

Build a Mansard loft conversion - £52,104

Loft conversion - £34,725

Build a kitchen extension - £42,104

Hip to gable loft conversion - £42,104

Granny annexe - £87,104

Garden office - £10,104

Convert a Garage - £16,104

Garage - £18,604

Build a flat roof extension - £22,104

Build a dormer loft conversion - £42,104

Concrete foundations - £6,354

Convert a bungalow loft - £29,104

Convert a basement - £38,670