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JK Doors is a trusted extension builder serving customers in SW1 and the surrounding area. Contact us to today to get a competitive quote for exten...
Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in SW1. No obligation free qu...
CK Constructions & Development Ltd is a trusted extension builder serving customers in SW1 and the surrounding area. Contact us to today to get a c...
A to Z Builders Ltd are here to help customers who need an Extension Builder in SW1. We offer a competitive rate to complete all your extension bui...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in SW1. No obligation free quot...
F & F Building Services is an established extension buildering business in SW1. We come highly recommended and provide competitive quotes for your ...
From £41,984
Experienced extension builder ready to quote for your work. Palm Property Developments Ltd is the best extension builder in SW1. No obligation free...
From £41,976
Need an Extension Builder in SW1? KÖK London ltd. has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £42,152
Plansing Ltd
Experience the best architectural design services with PLANSING, where we flawlessly integrate innovative architectural designer products to bring ...
From £40,208
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...

Kitchen extensions in SW1 range from the cheapest of £40,208 (London Design And Build based in SW1A) to the dearest of £42,376 (CK Constructions & Development Ltd based in WC1N), but these are just estimates based on our database of hourly and daily rates from tradespeople across the country.
The best way to get an accurate price for your kitchen extension is to get actual quotes. Post your job on HaMuch now and we'll send it to extension builders in SW1.
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 - £17,448

Two storey extension - £87,922

Build a timber frame extension - £25,948

Build a swimming pool - £80,948

Single storey extension - £53,960

Side return extension - £40,915

Install an RSJ - £2,148

Outbuilding - £9,948

Build a Mansard loft conversion - £51,948

Loft conversion - £33,263

Build a kitchen extension - £41,948

Hip to gable loft conversion - £41,948

Granny annexe - £86,948

Garden office - £9,948

Convert a Garage - £15,948

Garage - £18,448

Build a flat roof extension - £21,948

Build a dormer loft conversion - £41,948

Concrete foundations - £6,198

Convert a bungalow loft - £28,948

Convert a basement - £36,915