Retrofit Basements

Structural waterproofing is managed by qualified employees

We have specialist knowledge and can provide complete basement systems that are suitable for new builds, existing buildings or basements that are in need of renovation or waterproofing.

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Our Completed Projects

“After successful completion of 2-No. retro-fit basements together to a Mews in SW7 which extended to below the road using a complex method not normally adopted for domestic dwellings we have now returned to site to complete the waterproofing allowing the follow-on trades to fit out these 2 desirable homes. ”


“Works have been completed at our site overlooking Wimbledon Park. The project included the construction of a 200 square metre basement with pool below an existing house and extension. The scheme was revised for top down techniques to allow the Main Contractor to safely continue refurbishment of the large detached property whilst our works took place. The project is now complete on time and on budget. ”


“The reinforced concrete structural shell has now been completed to the retro-fit basement in this quiet prestigious Wandsworth Street. Works were extended to allow for a larger basement terrace and below garden plantroom during our contract which was successfully carried out with minimal extension in time. ”


“We have achieved completion of the structural shell for a new build detached home in Putney.The basement stretches from boundary to boundary on each side and to the pavement line at the front making access and logistics the main concern, however the project has been completed 3 weeks early. ”


“We have completed the construction of the retro-fit basement below an end of terrace property in Fulham. This was carried out with a Fit-Out Contractor we enjoy working with who will go on to complete the fit out and hand the keys to the Client. Project completed in time and on budget.”


“We end the year completing 3-No. further projects this month in Hampstead, Oxford and Chiswick. We welcome our new additional team of waterproofing, enlarging our waterproofing team to 8, and congratulate Chris on his promotion to the role of Forman. Looking forward to 2015.”


“With a start of a new year and projects underway in Fulham, Bayswater, Holland Park, Finchley, Hampstead and Oxford. As ever our waterproofing teams are busy throughout London and the Home Counties. We are now entering our 15th year! With over 1000 projects completed!
Happy New Year toall our Clients, Engineers and Architects! ”


“We are beginning new projects in Fulham, St Johns Wood, Hammersmith and Putney. Our project in Bayswater is coming to an end again on budget. Holland Park is progressing well and we are now looking to adopt a top-down methodology for the remaining works. We are looking forward to starting works on a new 200 square metre basement for a block of flats in Fulham. The scheme involves piled retaining walls, underpinning, propping, bulk excavation and formation of RC basement shell, all of which we carry out reqularly on our projects.
Our Delta Cavity Membrane Teams are always very busy. We are now commissioning our installation of a deep 2 story, plus pool waterproofing in SW7. ”


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Basement Tanking London

Retro Fit basements are basements or cellar conversions that are built beneath your existing home or building. Adding a new basement to your property can provide much needed space and add value. They are also a great solution where extensions are limited by size and planning issues.

Basement Tanking Company

We undertake the structural design and construction of your new basement and its full waterproofing ensuring that is ready for fitting out your to your chosen design. Lightwells, windows, a separate entrance, stairs and even basement terrace areas can all be added to provide a welcoming addition to your cellar conversion.

Our tanking systems are durable and reliable; fitted by our fully trained team, we will ensure that our waterproof membrane is securely fitted before applying a finish, such as plaster, to the walls. We fit tanking across North London and West London, as well as the rest of the South East of England.

Today’s challenge for the requirement of ever deeper and larger basement extending throughout the house and gardens can be met with our piled retaining walls, reinforced concrete walls and underpinning methods.

We are a company who prides itself on the level of service we offer and the specialist knowledge that we employ. We believe that our knowledge, products and cellar conversions are unrivalled and we have many satisfied customers from all over London to prove this.

We are very happy that you are considering us as your basement company and invite you to contact us with any questions you may have or just to discuss your requirements. We are confident that we can offer a much higher level of service that other basement companies, can handle all kinds of cellar and basement conversions big and small.

If you would like to speak to someone right away you can call us on our office number: 0870 801 0080. Alternatively you can fill out our contact form, which is situated on the left of this page, let us show you why we are better than other basement companies.