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SDS Constructions
Sean Smithers
Our building services company SDS Constructions has been established for many years and have been providing customers in Dagenham and the surroundi...
From £21,880
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...
Gems Building & Maintenance Services
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 Olympic Park. No obligation free quotes and man...
Decorating Building Service
Decorating Building Service are here to help customers who need an Extension Builder in Olympic Park. We offer a competitive rate to complete all y...
Sevcan Construction
Relax... you have found a reliable extension builder in Olympic Park. Sevcan Construction is a friendly and reliable company based in Olympic Park ...
Kunshi Services UK Ltd
Kunshi Services UK Ltd is a trusted extension builder serving customers in Olympic Park and the surrounding area. Contact us to today to get a comp...
From £22,176
Fedora and sons Ltd
MIHAI Martolea
Member since September 2026
Fedora and sons Ltd is a trusted extension builder serving customers in Olympic Park and the surrounding area. Contact us to today to get a competi...
RTC Plumbers
Shaik Jamal
Welcome to RTC Plumbers! With over 15 years of experience, we offer a range of plumbing services from simple repairs to complex installations, each...
ESK Builders
Need to find an Extension Builder near you for all your extension buildering work?
ESK Builders provides a local, trusted extension builder...
Flat roof extension cost in Olympic Park
A flat roof extension ranges from the cheapest of £21,416 (RTC Plumbers based in RM6) to the dearest of £22,712 (Render based in IG1), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in Olympic Park by posting a job with HaMuch. We'll send it to extension builders in Olympic Park.
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- Factors affecting the cost of flat roof extensions
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- Which is cheaper: a flat roof or pitched roof?
- How long does a flat roof extension take?
- Do you need planning permission for a flat roof extension?
- How long does a flat roof last?
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- What insulation do I need for a flat roof extension?
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Estimates for common extension builder jobs in Olympic Park;
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 - £17,662
Two storey extension - £88,244
Build a timber frame extension - £26,162
Build a swimming pool - £81,162
Single storey extension - £58,248
Side return extension - £43,327
Install an RSJ - £2,362
Outbuilding - £10,162
Build a Mansard loft conversion - £52,162
Loft conversion - £35,273
Build a kitchen extension - £42,162
Hip to gable loft conversion - £42,162
Granny annexe - £87,162
Garden office - £10,162
Convert a Garage - £16,162
Garage - £18,662
Build a flat roof extension - £22,162
Build a dormer loft conversion - £42,162
Concrete foundations - £6,412
Convert a bungalow loft - £29,162
Convert a basement - £39,327