Located in the northern quarter of Belgravia in the London Borough of Westminster, the early 19th century Grosvenor Estate Grade II listed building was transformed into five high-end private residential apartments. As part of the refurbishment, the façade and other listed elements were retained and restored whilst the section behind the façade was completed demolished and rebuilt. As well as creating luxurious residential units the basement areas were excavated and fitted out to house private leisure facilities and car parking.
Rendel's geotechnical team carried out the assessment of the effect of the proposed substructure works on the adjacent properties and basements as part of a boundary wall dispute. We provided 2D and 3D finite element modelling of six possible options for the excavation of the basement, including partial top-down with temporary struts, full top-down, soil grouting and various construction sequences. In addition, the geotechnical team provided a damage assessment of boundary walls for twenty possible scenarios and support in defining a site monitoring regime, as well as supporting solicitors and expert witnesses.
The £260 million works commenced in 2014 with the development completed in 2017.