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From £51,880
Can design and Construction
Erald Kanani
Member since August 2025
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Kunshi Services UK Ltd
Kunshi Services UK Ltd is a trusted extension builder serving customers in Plaistow and the surrounding area. Contact us to today to get a competit...
From £52,176
Fedora and sons Ltd
MIHAI Martolea
Member since September 2026
Fedora and sons Ltd is a trusted extension builder serving customers in Plaistow and the surrounding area. Contact us to today to get a competitive...
CC&D BUILDING LTD
Catalin CIOBANU
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Plaistow. No obligation free quotes ...
M Saleem Builders
Relax... you have found a reliable extension builder in Plaistow. M Saleem Builders is a friendly and reliable company based in Plaistow who consid...
KS Plastering SERVICE
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...
GNB Construction Builders Ltd
Trusted and professional extension builder in Plaistow. Experienced in all extension buildering work and keeping within budget and on quote. GNB Co...
G HAMID CONSTRUCTION LTD
Relax... you have found a reliable extension builder in Plaistow. G HAMID CONSTRUCTION LTD is a friendly and reliable company based in Plaistow who...
Kaseno Group
Kaseno Group are here to help customers who need an Extension Builder in Plaistow. We offer a competitive rate to complete all your extension build...
Glenward Builders Ltd
Experienced extension builder ready to quote for your work. Glenward Builders Ltd is the best extension builder in Plaistow. No obligation free quo...
Mansard loft conversion cost in Plaistow
Mansard loft conversions range from the cheapest installation of £51,880 (Can design and Construction based in Ig11) to the dearest of around £52,272 (Kunshi Services UK Ltd based in IG11).
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 Plaistow by posting a job with HaMuch and we'll send it to extension builders in Plaistow.
- How much does a mansard loft conversion cost?
- What is a mansard loft conversion?
- Factors that affect the cost of a mansard loft conversion
- Additional costs to consider with a mansard loft conversion
- How long does a mansard loft conversion take?
- Do I need planning permission for a mansard roof?
- What is the difference between a dormer and a mansard?
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Estimates for common extension builder jobs in Plaistow;
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 - £17,605
Two storey extension - £88,157
Build a timber frame extension - £26,105
Build a swimming pool - £81,105
Single storey extension - £57,096
Side return extension - £42,679
Install an RSJ - £2,305
Outbuilding - £10,105
Build a Mansard loft conversion - £52,105
Loft conversion - £34,733
Build a kitchen extension - £42,105
Hip to gable loft conversion - £42,105
Granny annexe - £87,105
Garden office - £10,105
Convert a Garage - £16,105
Garage - £18,605
Build a flat roof extension - £22,105
Build a dormer loft conversion - £42,105
Concrete foundations - £6,355
Convert a bungalow loft - £29,105
Convert a basement - £38,679