Map view of new Tweed Farms Greenhouse... https://www.google.ca/maps/place/Tweed+Farms+Inc./@43.1672406,-79.1198753,1284m/data=!3m1!1e3!4m6!3m5!1s0x0:0x3512cd080cbd4689!4b1!8m2!3d43.1684926!4d-79.1220211
It's a pretty good size.
Here is the co they bought the place from:
https://www.gardencitygrowers.com/default.aspx?p=aboutus
Website doesn't give much info on the GH.