Cottonwood
Roadster#433, Model S#S37
Te blue dot is added once the site location is known. Permit is not the right label -- that is what blueshift called it, mostly because early on the address was found on permits. But several other sites have been added based on articles about public meetings that reveal the site location... Not worth nitpicking -- it reflects a coming soon site that is not under construction yet...
I like to think of the blue, "permit" dot meaning that the permit and planning process is underway with a known address. This often means an item is on a planning commission agenda or before the local city council. As others have said, because fees and taxes often have to be paid to issue a permit, the building permit issuance usually happens a few days before construction starts.