TV mounting in Scarborough often ends up in the basement. The rec rooms in Agincourt, Wexford and Bendale houses were finished decades ago, and the wall you want is panelling or drywall sitting against a block foundation. That is fine to mount on, it just needs the right anchors.
Upstairs the fireplace wall is the usual choice, and the question is how high the screen should sit. I measure from the couch, get the bracket level and keep the cables out of sight. Ask for a quote first, and if a few other small jobs are waiting, I can take care of them in the same visit.