The meetinghouse is across from the Central Experimental Farm.
The Riverside Ward (or congregation) is one of seven congregations in the Ottawa Stake. Stake is a Church of Jesus Christ of Latter-day Saints (LDS) term for a local territory, in this case greater Ottawa-Gatineau. Members of the LDS are also known as Mormons.
This congregation's chapel (or church) building dates back to the 1970s when the Ottawa Stake was created. The LDS building is easy to identify. The steeple does not include a cross. The cross is a symbol of the dying Christ. The Mormon message is one of a living Christ.
The worship service (or sacrament meeting) takes place here on Sundays at 09h30. Non-LDS visitors are welcome at the sacrament meetings. Non-LDS visitors are also welcome at the Family History Center. I am not LDS.
This building is multi-purpose. At the back of the building is the entrance to the stake's Family History Center. Family history research (or genealogy) is a necessary part of Mormon life. In Mormon teaching, all individuals living or dead should be allowed access to the spirit world as defined by LDS beliefs. Therefore, research is required to properly identify the dead individual. Back in the '90s before the LDS got so much family history material on to the web, I spent many hours every week undertaking research in this building.
The building address is 1017 Prince of Wales Drive, Ottawa, Ontario K2C 3K1.
https://www.lds.org/maps/meetinghouses/id=ward:50903
N 45° 22.76 W 075° 42.25