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P R Building is a trusted extension builder serving customers in Clapton and the surrounding area. Contact us to today to get a competitive quote f...
Ali Alagoz
Propello is an established and experienced local extension builder in Clapton. Please contact us for a free, no obligation quote and competitive r...
Mick Singh
At Building Services Contractors we pride ourselves on an efficient and friendly service, and strive to achieve 100% customer satisfaction.
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
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
Relax... you have found a reliable extension builder in Clapton. M Saleem Builders is a friendly and reliable company based in Clapton who consider...
UK Drywall Ltd is an established and experienced local extension builder in Clapton. Please contact us for a free, no obligation quote and competit...
Sampson Essien
Thistle Bonding Coat: Ideal for use on low-suction backgrounds such as brick or concrete blocks, this product provided a solid foundation, Thi...
Trusted and professional extension builder in Clapton. Experienced in all extension buildering work and keeping within budget and on quote. GNB Con...
Relax... you have found a reliable extension builder in Clapton. 2nwest Builders and Decorators Ltd is a friendly and reliable company based in Cla...

Mansard loft conversions range from the cheapest installation of £51,936 (2nwest Builders and Decorators Ltd based in E17) to the dearest of around £53,584 (Propello based in E17).
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 Clapton by posting a job with HaMuch and we'll send it to extension builders in Clapton.
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 - £17,786

Two storey extension - £88,430

Build a timber frame extension - £26,286

Build a swimming pool - £81,286

Single storey extension - £60,728

Side return extension - £44,722

Install an RSJ - £2,486

Outbuilding - £10,286

Build a Mansard loft conversion - £52,286

Loft conversion - £36,435

Build a kitchen extension - £42,286

Hip to gable loft conversion - £42,286

Granny annexe - £87,286

Garden office - £10,286

Convert a Garage - £16,286

Garage - £18,786

Build a flat roof extension - £22,286

Build a dormer loft conversion - £42,286

Concrete foundations - £6,536

Convert a bungalow loft - £29,286

Convert a basement - £40,722