https://thegww.com/exclusive-cbs-all-access-spin-off-series-star-trek-section-31-will-begin-filming-may-4th-in-mississauga-canada/ It's going to be shot in Mississauga, which is a city that is literally beside Toronto, and concidered part of the GTA (Greater Toronto Area). Filming is beginning in May 4th it got delayed because the lead actress is doing a major marvel movie first.