Fraser Bond are the leading lettings and property management agents for Chiltern Firehouse - London W1U. Chiltern Firehouse building at 1 Chiltern Street in Marylebone, London W1. Home to a popular restaurant, the building was restored by hotelier André Balazs. 2020 - Knight Harwood hands over the second project with the Chiltern Firehouse Hotel and Restaurant, which provides the additional covered space in the outdoor courtyard. The cast iron and glass structure design was inspired by Victorian architect Joseph Paxton who led the way in conservatory design.