Door repair and installation in Toronto usually starts with a door that no longer fits the opening it was hung in. Old city houses move. Frames go out of square, latches miss the strike, and the bottom rail drags on the floor.
I am Sercan, and I do this work myself across the old city, from Parkdale and the Annex through Riverdale and the Beach. Some doors need an hour of adjustment. Others are past saving and want a new pre-hung unit. I will tell you which, and agree the price before I start.