 The post involved a lot of design work for Balfour , who seems to have been able to take whatever commissions he wanted , often delegating them to Turner . In the 1890s , Balfour and Turner appear to have been the most prolific designers of private houses on the estate , and in 1892 Balfour was made a Fellow of the Royal Institute of British Architects . Their own work included most of the wholly redeveloped Balfour Place in Mayfair , formerly known as Portugal Street and renamed for the architect . 
