I’d ask about what else is going on in the space the day or week of your tech and performance, and how that may affect you. If other groups also use or have access to the venue, they might leave props or set pieces that will be in your way. It could also limit the amount of time you have in the space. Beware of other groups being booked right up until your scheduled start time; if that happens, they may still be cleaning up when you’re ready to get started, so you may want to call actors a bit later. Whatever the venue tells you about space sharing, I’d check in a few times prior to tech to makes sure their answer, or the schedules of any other group, hasn’t change. Other questions…
-Is there anywhere to store your props/costumes/set pieces? Can you bring a lock and a box and leave that in the venue with your stuff?
-How is the house setup? Are the chairs moveable? Who decides on where the chairs are set, and who actually sets them up?
-Who is your main point of contact for the days you will be at the venue? Will that person be at the venue while you are working there (if not, get the name and number of the person who will be there, if anyone). If your group is on its own in the space, what are the procedures for locking/unlocking the building? Who do you call with technical problems?
-Ask specifically about house lights; they may be separate from the light board