Building Property Extensions throughout London

Want to build a property extension? When you choose CosstArt, your new building extension will be designed and constructed to meet your needs and budget. Our team in London serve a wide range of domestic and commercial clients and we are confident that we can meet and exceed your expectations. Get in touch with our builders today to discuss our affordable building extension services.

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Design and Construction

All of our fully insured and qualified contractors are highly skilled in the building trade. No job is too big or too small for our team, who have more than 16 years’ experience in designing and constructing property extensions in London and the surrounding areas. Trained to deal with any situation, we take care of all aspects of your extensions, including:

Extensions - Design and Construction

  • Joinery Services

  • Flooring Installations

  • Lighting Installations

  • Electrical and Plumbing Work

Bespoke Property Extensions

We specialise in building property extensions to suit your requirements and budget.

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