As part of the negotiation, we requested all drawings/maps/similar documents for the house. This is basically the floor plan of the house from the files of the previous owners.
If you turn this drawing 90º to Clockwise, it aligns to the main site’s aerial image. The second giant box structure in the aerial images that sits between the garage of this drawing (which is now a finished room/office) and the giant detached garage is the “studio” space.
Sidenote: the bathrooms near the entry were remodeled prior to our purchase so now there is one toilet/sink powder-room-style bath (left-most space in the above image) and one large full bath where there were once separate shower/bath/toilet areas.