7. Access - Given the number of less abled people that we've now got interest from, we need to make sure that any site we look at has friendly access (eg: ramps & no stairs). Of course, as currently, a roller door would be very useful to get stuff in/out, even if it's not quite as wide as our current one.
8. Toilets/kitchen - It would be good to have at least 2 toilets and at least a small kitchen area (a non-toilet sink, some counter space for a coffee machine, etc). The 2 toilets is not for a 'male/female' divide, but just simply because it's so much easier if one's already in use (especially as the reason we want more space is so we can grow in membership). That said, if one of them was larger than the other (eg: to accommodate wheelchairs) then that wouldn't be a bad thing either.
9. Power - We preferably want something with 3-phase, or where getting 3-phase outlets run would not be a problem. We also don't want something that has an inadequate power feed (scout halls tend to have this problem, as they weren't expected to be running lots of equipment like we do).
10.Communications - The place must have at least a phone line (scout halls are once again usually into this problem of not having one). While we can probably get one installed (if it's got some other form of comms like fibre), it's not cheap if there is no line there already.
11. Flooring - A portion of the floor space really needs to be concrete, or some sort of hard wearing surface that isn't going to be a problem to clean. Carpet, while nice in a common room or light work area (eg: 3D printing, laser cutting, people sitting with laptops or watching a presentation, etc), would not make sense around areas like the lathe, milling and woodworking areas, and probably not much around soldering areas either. As you can guess, this doesn't need to be the whole space, but I'd guess at least 75-100m2.
12.Transport - Near the train is most preferred, with trams a close second. I don't think we'd care too much about buses. Parking is of course a big concern too, as at the current space we've got a lack of immediate parking (though at least we have the council carpark nearby).
13.Ventilation/heating/cooling - We really want to make sure that things like 3D printers laser cutting and soldering stations could be used in a well ventilated room. Running duct like we have is fine, but we need somewhere to run the duct to (eg a hole in a window, a hole in the roof, etc). Related of course is that having a space that has heating/cooling would be advantageous from a comfort perspective, and avoids the need for things like gas space heaters (or at least reduces them) in the winter, or boiling on hot days in the summer.
14. Anyway, that's just a list of things I think we'd find it hard to do without.