Access Richmond Hill
The Access Richmond Hill Contact Centre provides assistance for general inquiries, responds to questions or concerns regarding programs and services as well as accepts in person payments.
Contact Us
905-771-8800
Hours of Service:
Monday through Friday, 8:30 a.m. to 4:30 p.m.
Report Feedback
Report a problem with a service, e.g. missed garbage collection, overnight parking, potholes, street lights, etc.
Richmond Hill David Dunlap Observatory
The Richmond Hill David Dunlap Observatory (RHDDO), designated under the Ontario Heritage Act and a national historic designation, is proudly owned by the City of Richmond Hill.
An iconic park and facility located at 123A Hillsview Drive, plans are underway for the transformation of the RHDDO property into a unique destination park through the RHDDO Master Plan. Learn more about ongoing projects as we implement the first phase of the Master Plan.
The RHDDO first opened in 1935 and was at the forefront of Canadian astronomical research. Learn more about its history and achievements at the site, including advances in radio astronomy and the first direct evidence that Cygnus X-1 was a black hole. Today, the RHDDO is continuing its heritage as a facility for public education and outreach through City-run programs and partnerships.
It is also a popular site for film, television and advertising production.
Planning your visit
Administration Building and Observatory Dome
Sign up for guided tours, public astronomy programs or our private and group packages. All available through advance registration through the Astronomy Series programs and/or booking group tours and private programs.
Accessibility: As the Observatory and Administration Buildings are historic buildings, they do not meet existing accessibility standards. Access to both buildings is by stairs only. Washrooms and program rooms are located in the basement and on the second floor of the Administration Building and are accessible only by stairs. Both the Administration Building and the Observatory do not have elevators.
Observatory Park
The natural spaces of the Richmond Hill David Dunlap Observatory Park is open for all to enjoy everyday from 7 a.m. to 11 p.m.
