The majority of Organisational data can be gathered from your HR department. They typically have information on the number of employees per facility, as well as employees' working days per week and working hours per day. If your organisation has company-wide policies on how many days per week employees are permitted to work from home they can also provide you with this data.
Information on your facility size can typically be gathered from your Landlord or Building Manager.
Surveying employees
If your company allows employees full flexibility between remote and in-office work, a survey can be the best way to gather accurate information about how many of your employees work from home and how often. This can be done in conjunction with collecting information on their employee commute. Check out our full guide to surveying employees here.