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D & G Building & Decorating
Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in Belgravia. No obligation f...
"Concrete foundation" - W1T, job posted 16/10/25
CK Constructions & Development Ltd
CK Constructions & Development Ltd is a trusted extension builder serving customers in Belgravia and the surrounding area. Contact us to today to g...
"Basement conversion" - LAMBETH, job posted 02/05/25
A to Z Builders Ltd
A to Z Builders Ltd are here to help customers who need an Extension Builder in Belgravia. We offer a competitive rate to complete all your extensi...
"Extension to lower ground area." - SW9, job posted 28/03/25
Cornerstones Construction
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in Belgravia. No obligation fre...
JK Doors
JK Doors is a trusted extension builder serving customers in Belgravia and the surrounding area. Contact us to today to get a competitive quote for...
F & F Building Services
F & F Building Services is an established extension buildering business in Belgravia. We come highly recommended and provide competitive quotes for...
£40/hr
£248/day
Palm Property Developments Ltd
Experienced extension builder ready to quote for your work. Palm Property Developments Ltd is the best extension builder in Belgravia. No obligatio...
£40/hr
£247/day
KÖK London ltd.
Need an Extension Builder in Belgravia? KÖK London ltd. has been helping local clients (5 mile radius) with their extension buildering jobs for ma...
£42/hr
£269/day
plansing
Plansing Ltd
Experience the best architectural design services with PLANSING, where we flawlessly integrate innovative architectural designer products to bring ...
£26/hr
£26/day
London Design And Build
London Design And Build
Here at London Design and Build, our team of architects, interior designers, structural engineers and contractors, offer a bespoke, turn-key servic...
£40/hr
£249/day
London Projects Ltd
Relax... you have found a reliable extension builder in Belgravia. London Projects Ltd is a friendly and reliable company based in Belgravia who co...
£47/hr
£292/day
Luxury Movement
Luxury Movement is an established extension buildering business in Belgravia. We come highly recommended and provide competitive quotes for your wo...
£47/hr
£290/day
Cliden Construction (London)
Cliden Construction (London) is a trusted extension builder serving customers in Belgravia and the surrounding area. Contact us to today to get a c...
£48/hr
£298/day
Future Homes Design and Build
Experienced extension builder ready to quote for your work. Future Homes Design and Build is the best extension builder in Belgravia. No obligation...
£41/hr
£253/day
ALT CONSTRUCTION
At Alt Construction we provide a complete and professional turnkey construction service for internal alterations, extensions, including detailed de...
£42/hr
£263/day
The Maybria Group
Trusted and professional extension builder in Belgravia. Experienced in all extension buildering work and keeping within budget and on quote. The M...
£48/hr
£299/day
Property Refurbishment London
Trusted and professional extension builder in Belgravia. Experienced in all extension buildering work and keeping within budget and on quote. Prope...
£47/hr
£294/day
Mayfair Design
Experienced extension builder ready to quote for your work. Mayfair Design is the best extension builder in Belgravia. No obligation free quotes an...
£38/hr
£237/day
Sloane Ave Renovations
Trusted and professional extension builder in Belgravia. Experienced in all extension buildering work and keeping within budget and on quote. Sloan...
£47/hr
£292/day
Knightsbridge Design
Knightsbridge Design was founded by a group consisting of some of the most exceptional and talented decorators in London. Our mission is to provide...
Quickly find an Extension Builder in Belgravia
Use these steps to find Extension Builders in Belgravia for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in Belgravia. We’ll notify you via text or email when an Extension Builder is available to quote.
- Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local Belgravia Extension Builders or phone them directly - you’re in control!
Local Extension Builders in London Boroughs
Job estimates from extension builders near you
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.
Build a timber frame extension - £26,208
Garden office - £10,208
Granny annexe - £87,208
Build a flat roof extension - £22,208
Convert a Garage - £16,208
Hip to gable loft conversion - £42,208
Convert a bungalow loft - £29,208
Build a dormer loft conversion - £42,208
Build a swimming pool - £81,208
Build a Mansard loft conversion - £52,208
Concrete foundations - £6,458
Underpin a building - £17,708
Two storey extension - £88,312
Convert a basement - £39,840
Side return extension - £43,840
Loft conversion - £35,700
Garage - £18,708
Single storey extension - £59,160
Outbuilding - £10,208
Install an RSJ - £2,408
Build a kitchen extension - £42,208
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