Torrington Design
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
CK Constructions & Development Ltd is a trusted extension builder serving customers in EC4Y and the surrounding area. Contact us to today to get a ...
A to Z Builders Ltd are here to help customers who need an Extension Builder in EC4Y. We offer a competitive rate to complete all your extension bu...
JK Doors is a trusted extension builder serving customers in EC4Y and the surrounding area. Contact us to today to get a competitive quote for exte...
JM Building Services is a trusted extension builder serving customers in EC4Y and the surrounding area. Contact us to today to get a competitive qu...
Buildwiser is a trusted extension builder serving customers in EC4Y and the surrounding area. Contact us to today to get a competitive quote for ex...
F & F Building Services is an established extension buildering business in EC4Y. We come highly recommended and provide competitive quotes for your...
AAA Design Decorators are here to help customers who need an Extension Builder in EC4Y. We offer a competitive rate to complete all your extension ...
Need to find an Extension Builder near you for all your extension buildering work?
AGRI CONSTRUCTION provides a local, trusted extension bu...

Mansard loft conversions range from the cheapest installation of £51,976 (A to Z Builders Ltd based in SW1P) to the dearest of around £52,424 (AAA Design Decorators based in SE17).
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 EC4Y by posting a job with HaMuch and we'll send it to extension builders in EC4Y.
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 - £17,651

Two storey extension - £88,227

Build a timber frame extension - £26,151

Build a swimming pool - £81,151

Single storey extension - £58,024

Side return extension - £43,201

Install an RSJ - £2,351

Outbuilding - £10,151

Build a Mansard loft conversion - £52,151

Loft conversion - £35,168

Build a kitchen extension - £42,151

Hip to gable loft conversion - £42,151

Granny annexe - £87,151

Garden office - £10,151

Convert a Garage - £16,151

Garage - £18,651

Build a flat roof extension - £22,151

Build a dormer loft conversion - £42,151

Concrete foundations - £6,401

Convert a bungalow loft - £29,151

Convert a basement - £39,201