There's two types of hangars at OAK where my flying club is and where I'm building my 14.
The 'new' T's and the port a ports are the ones without dedicated power. You have to (if you're close enough to one) siphon power from a light pole, use solar or a genny. They've had problems with leaks up top and the wall to floor area isn't really sealed so rain, mice, etc come right on in.
The old T's are on the other side of 15/33 and are the ones that you want. Power (110 in most of the smaller ones, 110 and 220 in the twin hangars) is in all hangars. People keep their tools there as well as people having built mezzanines for more storage etc etc.
New T's there's generally no waiting list for. The old Ts has a list. I've been on it for 3 years. The average wait is 3-4 (it used to be 8-10). There's plenty of tie downs though, a plane wash area and a maintenance area people can taxi/tow their planes over to work on them (you provide your own tools of course).
Yes there are security minimums there as the GA friendly(er) north field area is technically tied to the commercial south field via a taxiway. So theres fingerprinting, background checks, gotta get a badge, computer based training every 2 years, insurance minimums etc. It's a bit of a palava BUT you, your plane and all of your equipment is secure.
Dues paid (2019)
Empennage - done(ish)
Wings - done(ish)
Fuselage - Somewhere in Ch. 30
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