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. We are currently working on the first phase of the Master Plan and details are available here.
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.
When can you visit the RHDDO?
You can visit the RHDDO buildings by pre-registering for one of our Astronomy Series programs. The site is also available for booking group tours and private programs.
It is also a popular site for film, television and advertising production.
