Do you want to know the size of a building?
Yes, you can!
We pull data from a number of sources and make them accessible in Nimbus.
The gross external area - The whole area of the building, including external walls.
This will only consider the ground floor. It also shows this on the Building Footprint filter description. You can use street view to see how many floors there are.
Another check would be to view the Commercial Rates section within the information panel. This will detail what rates are being paid. As part of the data the square footage of each level is listed.
You can add these together to get the total sq ft.