Grand Dunman Grand-Dunman is the Iatest Mega Condo Launch in District 15 along Dunman Road, near to Dakota MRT presented to you by SingHaiYi Croupe SingHaiyi-Group is a fast growing, diversified company focused on property development, investment and management services. The Croup is led by a management team that has deep insights and strong connections that enables access to unique and rare investment opportunities.