Specialist waterproofing contractors. At Onyx Basement Services Ltd,
  • Basement Cellar Conversions
  • Waterproofing Services
    • Type C Cavity Drainage
    • Deck and Buried Roof Waterproofing
    • External Type ‘A’ Barrier Systems
    • Internal Type ‘A’ Barrier Systems
    • Lift Pit Waterproofing
    • Basement Pumps and Servicing
    • Concrete Repairs
  • About Us
  • Case studies
  • Contact Us

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  • About us
  • Contact Us
  • Specialist Waterproofing Contractors
  • Privacy Policy
  • Waterproofing Contractor Services
    • Basement Cellar Conversions
    • Basement Conversions London
    • Basement Pumps and Servicing
    • Concrete Repairs
    • Deck and Buried Roof Waterproofing
    • External Type ‘A’ Barrier Systems
    • Internal Type ‘A’ Barrier Systems
    • Lift Pit Waterproofing
    • Type C Cavity Drainage

Case study

  • Private Property – Gloucestershire
  • Private Property - Basement Leisure Complex Build – Berkhamsted, Hertfordshire
  • Basement Waterproofing Design & Installation - Private Property – Chigwell
  • Multi-Level Basement Waterproofing Project - Hanger lane, London

Please contact us for further information

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Specialist waterproofing contractors. At Onyx Basement Services Ltd,
Quick links
  • Specialist Waterproofing Contractors
  • Basement Conversions London
  • About us
  • Waterproofing Contractor Services
  • Contact Us
  • Privacy Policy
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Contact

Email: contact@onyxbasementservices.co.uk

Tel: 0208 798 2078

Specialist waterproofing contractors. At Onyx Basement Services Ltd,

Registered Delta Membrane Installer

© 2026 ONYX BASEMENT SERVICES LTD | Registered in England and Wales.
Registered number: 13615988.
Registered office: 25 Church Street, Kidderminster, DY10 2AW

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Onyx Basement Services Ltd - Specialist waterproofing contractors in Domestic and Commercial buildings for London Birmingham, Cambridge, Oxford, and the South of England. Services include: Basement Conversions, Type C Cavity Drainage, Buried Roof Waterproofing, Type A and Lift Pit Waterproofing. Specialist basement waterproofing contractors in London.

Basement and Cellar Conversions London waterproofing contractor
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Onyx Basement Services Ltd - Specialist waterproofing contractors in Domestic and Commercial buildings for London Birmingham, Cambridge, Oxford, and the South of England. Services include; Basement Conversions, Type C Cavity Drainage, Basement Cellar Conversions London, Buried Roof Waterproofing, Type A and Lift Pit Waterproofing. Specialist basement waterproofing contractors in London.

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Onyx Basement Services Ltd - Specialist waterproofing contractors in Domestic and Commercial buildings for London Birmingham, Cambridge, Oxford, and the South of England. Services include; Basement Conversions, Type C Cavity Drainage, Buried Roof Waterproofing, Type A and Lift Pit Waterproofing. Specialist basement waterproofing contractors in London.

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Onyx Basement Services Ltd - Specialist waterproofing contractors in Domestic and Commercial buildings for London Birmingham, Cambridge, Oxford, and the South of England. Services include; Basement Conversions, Type C Cavity Drainage, Buried Roof Waterproofing, Type A and Lift Pit Waterproofing.

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Onyx Basement Services Ltd - Specialist waterproofing contractors in Domestic and Commercial buildings for London Birmingham, Cambridge, Oxford, and the South of England. Services include; Basement Conversions, Type C Cavity Drainage, Basement Cellar Conversions London, Buried Roof Waterproofing, Type A and Lift Pit Waterproofing. Specialist basement waterproofing contractors in London.