Google Earth is a great work tool.
I use it the regular view to look at roofs, where the A/C equipment is, and to get a general idea of the layout of the property. One tool is the ruler where you can get dimensions.
In Street view I use it to see what kind of condition the building is in (I've avoided some real dumps that way)
I admit I go there regularly to get views of far away places, in regular as well as the Street view too, out of curiosity