Soho Office – Waterproofing Historic Basements & Cellars – London

Recency House, located in the Soho Conservation Area – this large and historically significant building had fallen into disrepair. The client was granted consent to create an innovative hybrid office and hospitality proposition which included workspaces, members lounges, meeting/event spaces, restaurants, bars, hotel bedrooms and a gym/wellbeing studio.

Working closely with Architects – Denton Corker Marshall, Main Contractors – StructureToneUK and Suppliers – Newton Waterproofing, we designed a waterproofing solution for this complex and historically important basement.


The main facade of the building remained together with some of the internal structure, including the basement. New supports, walls, floors and openings were added which meant that waterproofing had to be designed to protect the old and new structures. Here, product choice, pragmatic design and preparation were key and our Senior Designers were involved heavily in every detail.

Within the large basement there are five existing cellars off-shooting the main section, each with its own complexities. We had to treat each section as an individual project. This made the design complex, as the waterproofing had to also work together symbiotically so we could be certain that the structure would be dry and drain effectively. As a building of historical significance within in a conservation area the preparation work was plentiful and had to be carefully considered and conducted so as not to damage or cause harm to the existing parts of the structure.

Sustainabile Specification

We specified the Newton Eco-friendly 508 membrane. Newton 107 which is a sustainably sourced slurry that has eco efficient values and is made in the UK. We also specified natural cement, and environmentally friendly low carbon repair motor for filling and patching. We utilised the Newton Waterproofings Recycling Scheme so all offcuts were returned to be recycled.


A well executed, sustainably designed, waterproofing installation from the outset. We have been proud to be part of this build and assist with the preservation of this this historical building located in a conservation area.

Regency House now has a very dry usable basement that was completed ahead of schedule and on budget.