Fraser Bond are the leading lettings and property management agents for Eighty Grosvenor Street - London W1K. Eighty Grosvenor Street is a mixed-use development in Mayfair, London W1. The development by Frelene Limited is expected to complete in Q2 2021. Contact Bluebook for enquiries. History Nos. 79-81 Grosvenor Street is a group of unlisted buildings. Nos. 79 and 80 were built to a design by Sydney Smirke, circa 1852. No.81 dates back to the mid-19th century. Tyburn is in a sewer beneath No.81. 2016 - Planning permission granted for: Demolition of all existing buildings (with the exception of the.