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From £52,600
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...
Render
Experienced extension builder ready to quote for your work. Render is the best extension builder in Forest Gate. No obligation free quotes and many...
From £58,520
Fedora and sons Ltd
MIHAI Martolea
Member since September 2026
Fedora and sons Ltd is a trusted extension builder serving customers in Forest Gate and the surrounding area. Contact us to today to get a competit...
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 Forest Gate. No obligation free quot...
M Saleem Builders
Relax... you have found a reliable extension builder in Forest Gate. M Saleem Builders is a friendly and reliable company based in Forest Gate who ...
UK Drywall Ltd
UK Drywall Ltd is an established and experienced local extension builder in Forest Gate. Please contact us for a free, no obligation quote and comp...
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 Forest Gate. Experienced in all extension buildering work and keeping within budget and on quote. GNB...
G HAMID CONSTRUCTION LTD
Relax... you have found a reliable extension builder in Forest Gate. G HAMID CONSTRUCTION LTD is a friendly and reliable company based in Forest Ga...
Kaseno Group
Kaseno Group are here to help customers who need an Extension Builder in Forest Gate. We offer a competitive rate to complete all your extension bu...
Extension builder estimates (based on hourly rates) to build a single storey extension in Forest Gate
- How much does a single storey extension cost?
- Single storey extension cost calculator
- What size single storey extension can I build without planning permission?
- Do I need an architect for an extension?
- How deep do foundations need to be for a single storey extension?
- Is it cheaper to have an extension or a conservatory?
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Estimates for common extension builder jobs in Forest Gate;
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 - £17,657
Two storey extension - £88,235
Build a timber frame extension - £26,157
Build a swimming pool - £81,157
Single storey extension - £58,136
Side return extension - £43,264
Install an RSJ - £2,357
Outbuilding - £10,157
Build a Mansard loft conversion - £52,157
Loft conversion - £35,220
Build a kitchen extension - £42,157
Hip to gable loft conversion - £42,157
Granny annexe - £87,157
Garden office - £10,157
Convert a Garage - £16,157
Garage - £18,657
Build a flat roof extension - £22,157
Build a dormer loft conversion - £42,157
Concrete foundations - £6,407
Convert a bungalow loft - £29,157
Convert a basement - £39,264