At least 50 firefighters are trying to knock down a blaze at on old church on Dufferin St, south of Dupont St.
Flames were first reported at 3pm Friday at the building which is being converted to accommodate condos. It isn't clear what sparked the two-alarm blaze.
Dufferin is closed between Bloor and Dupont. Firefighters have been dousing the building with water from above.
Some nearby homes have been evacuated, though it isn't clear how many.
It does not appear that anyone was hurt.