79-81 Grosvenor Street is located in the heart of the Mayfair conservation zone in London, sitting in a busy road with high quality commercial and retail premises on either side. Bourdon Street is quieter, and serves as a one way link road from Grosvenor Hill to Grosvenor Street.
The site was previously occupied by a café and offices, with Grade II Listed buildings at 74 Grosvenor Street and 131-134/135-137 New Bond Street located in the vicinity. With 2 historical Thames Water sewers running beneath, one being the River Tyburn beneath Bourdon Street which also passes through the site, the structural design has been restricted meaning this element has had to respond in many different ways.
A number of key stakeholder negotiations have taken place between Grosvenor Estates as freeholder, along with Thames water and the adjoining owners and tenants. As the project site is hemmed in on all sides, this has led to complex party wall negotiations and buildability considerations. These considerations led us to discover the opportunities with the whole development being an exercise in precision, working very closely with the main contractor, to optimize all net lettable areas with an exacting, heavily engineered core, whilst providing user experiences and amenities at the top end of Mayfair expectations.