You will have to coordinate with the host when you want to access the space.
Summary
Our basement is large, safe, and inaccessible to our dog who stays on the main floors of the house. The stairs are slightly steeper than standard stairs, but are generally accessible.
You'll be able to access the basement any time during approximate business hours (of course we can be flexible), but we'll need to know whether to crate our pup so will just need a heads up that you'll be coming by.