This contractor is successfully audited for the Contractor Assessment Scheme

Membership Category

Certified Contractor category A

  • Domestic Superstructure repairs
  • Traditional and piled domestic underpinning
  • Open site piling and piled slab operations
  • Structural works to single story domestic basements Inc. waterproofing works valued less than £300k

Certified Contractor category B

  • Structural works to all multi-story basements and others with structural elements greater than £300k in value
  • Structural works to all multi-story basements and others with structural elements greater than £300k in value, including waterproofing works

With many hundreds of basements built in London, Robin Knowles offers his unrivalled experience through Knowles & Associates Ltd. Robin has worked in the basement construction and high-end property renovation business for over 25 years. Project sizes range from: 1. Straight-forward Retro-Fit Basements, through 2. concrete Shell-and-Superstructure only, to 3. High-end Refurbishments and Special Projects Construction. Knowles' input will be tailored to your exact requirements, from short, specific consultancy to complement your existing team, up to full-scale project management and construction. Our specialism lies with the design and construction of lower-ground floor and basement accommodation. But our skillset now extends to a full-service construction capability, should that be required. Our inside knowledge and no-nonsense approach ensure you will get the top people and best value for money throughout. Our professional teams of foremen and underpinners work efficiently and effectively, our priority being safety and quality of design. Knowles' bespoke professional approach is specifically designed to take your stress away and make sure your project meets and exceeds expectations. We provide expert services at all stages of work from design to fit-out. We endeavour to keep members of the public fully aware of the project and issue newsletters to near neighbours advising them of progress and completion dates as and when available. At Knowles you can be assured of a personal experience that makes possible your ambitions for your home. Please call Robin or one of the team on 01344 886898 or email us on


  • ASUC Insurance Backed Guarantee
  • Retrofit Basements

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