Castle Green is a 99-year Leasehold condominium located at Yo Chu Kang Road in District D26. Castle Green is close to Yio Chu Kang MRT NS15. Amenities near Castle Green Castle Green is a short drive to Ang Mo Kio (AMK) Hub and Bishan North Shopping Mall. It is also not far from several schools such as Mayflower Primary School, Anderson Junior College and Nanyang Polytechnic. Castle Green is accessible via Yio Chu Kang Road and Ang Mo Kio Avenue 6.