Between 1980 and 2000, Gaysorn Group diversified its interests. The Group co-founded Finance One, which was named Thailand’s leading financial services company in 1991 and co-founded Quality Houses Plc, a property firm listed on the Stock Exchange of Thailand. Developments included prestigious commercial office and lifestyle complexes around the city: Q-House Convent Road, Q-House Asoke and Q-House Sathorn along with serviced apartments Center Point Petchaburi, Sukhumvit and Bangrak.