Good access into the venue, car parking space, plenty of power points, Wi-Fi capabilities, and secure storage for equipment are all a must. Does the venue offer easy access for your film crews to bring large equipment into the building? Is there adequate parking for trucks and equipment lorries? Are there lifts to get to upper floors? These are all questions you need to ask.
Make sure there is somewhere to store equipment safely and securely when it is not being used, as well as secure overnight storage for props, wardrobe, equipment, etc, if your shoot is going to run across multiple days.