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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 £86,880
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...
PHOENIX DEVELOPMNTS LONDON LTD
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 Becontree. No obligation free quotes and many h...
Tony Rutter
Need an Extension Builder in Becontree? Tony Rutter has been helping local clients (10 mile radius) with their extension buildering jobs for many y...
Decorating Building Service
Decorating Building Service are here to help customers who need an Extension Builder in Becontree. We offer a competitive rate to complete all your...
Sevcan Construction
Relax... you have found a reliable extension builder in Becontree. Sevcan Construction is a friendly and reliable company based in Becontree who co...
Kunshi Services UK Ltd
Kunshi Services UK Ltd is a trusted extension builder serving customers in Becontree 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...
Granny Annexe Cost in Becontree
Building a granny annexe ranges from £86,416 (RTC Plumbers based in RM6) to £87,712 (Render based in IG1), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in Becontree by posting a job with HaMuch. We will send it to extension builders in Becontree who will be happy to help you.
- How much does a granny annexe cost to build in the UK?
- What is a granny annexe?
- How big can a granny annexe be?
- How to get planning permission for a granny annexe
- What is the granny annexe tax loophole?
- Does an annexe increase council tax?
- Do you need planning permission to convert a garage into a granny flat?
- Can you claim VAT back on a granny annexe?
- Can I let out my granny annexe?
- Does an annexe increase property value?
- Can a granny annexe be sold separately?
- Do you have to pay stamp duty on an annexe?
Get extension builder rates instantly
Estimates for common extension builder jobs in Becontree;
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 - £17,679
Two storey extension - £88,269
Build a timber frame extension - £26,179
Build a swimming pool - £81,179
Single storey extension - £58,584
Side return extension - £43,516
Install an RSJ - £2,379
Outbuilding - £10,179
Build a Mansard loft conversion - £52,179
Loft conversion - £35,430
Build a kitchen extension - £42,179
Hip to gable loft conversion - £42,179
Granny annexe - £87,179
Garden office - £10,179
Convert a Garage - £16,179
Garage - £18,679
Build a flat roof extension - £22,179
Build a dormer loft conversion - £42,179
Concrete foundations - £6,429
Convert a bungalow loft - £29,179
Convert a basement - £39,516