Filming location?

Anyone else curious about where their set is?

The easy assumption is Southern California, and some of the hilly backgrounds support this.

As to the structures, unless it's actually a set created for the show, it does look like some sort of small old military warehouse compound -- an annex of a larger base.

My guess is it's on the old Camp Kearny/Camp Elliot grounds -- a part that's no longer MCAS Miramar property. In some background scenes you can see houses on the hills approximately a mile away.