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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 £9,880
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...
Major Building Contractors Ltd
Relax... you have found a reliable extension builder in Seven Kings. Major Building Contractors Ltd is a friendly and reliable company based in Sev...
Decorating Building Service
Decorating Building Service are here to help customers who need an Extension Builder in Seven Kings. We offer a competitive rate to complete all yo...
Sz Builders
Need to find an Extension Builder near you for all your extension buildering work?
Sz Builders provides a local, trusted extension builderi...
Render
Experienced extension builder ready to quote for your work. Render is the best extension builder in Seven Kings. No obligation free quotes and many...
From £10,176
Fedora and sons Ltd
MIHAI Martolea
Member since September 2026
Fedora and sons Ltd is a trusted extension builder serving customers in Seven Kings and the surrounding area. Contact us to today to get a competit...
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...
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...
Tony Rutter
Need an Extension Builder in Seven Kings? Tony Rutter has been helping local clients (10 mile radius) with their extension buildering jobs for many...
Garden Office Cost in Seven Kings
Garden offices range from the cheapest of £9,880 (Can design and Construction based in Ig11) to the dearest of £10,712 (Render based in IG1), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in Seven Kings by posting a job with HaMuch. We'll send it to extension builders in Seven Kings.
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Estimates for common extension builder jobs in Seven Kings;
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 - £17,730
Two storey extension - £88,344
Build a timber frame extension - £26,230
Build a swimming pool - £81,230
Single storey extension - £59,592
Side return extension - £44,083
Install an RSJ - £2,430
Outbuilding - £10,230
Build a Mansard loft conversion - £52,230
Loft conversion - £35,903
Build a kitchen extension - £42,230
Hip to gable loft conversion - £42,230
Granny annexe - £87,230
Garden office - £10,230
Convert a Garage - £16,230
Garage - £18,730
Build a flat roof extension - £22,230
Build a dormer loft conversion - £42,230
Concrete foundations - £6,480
Convert a bungalow loft - £29,230
Convert a basement - £40,083