I have a huge double garage - but doors only just big enough to get my Evoque in with the mirrors folded. It's a fairly new house (2001).
I ALWAYS make sure the Evoque is in there, Mrs T's Toyota gets parked on the drive in front of the doors - yes, it's a PITA to get the Evoque out, but I seldom go out in it when in a rush. I also have the garage alarmed as the other side of it is used for aircraft restoration work.
Next door(s) ... same house, same size garage - one has a Merc Hearse, the other has some sort of butt ugly Audi - neither park in their garages and have them just full of boxes, junk, freezers etc ... If the scum come a callin' I'd like to thing the Audi will go first, followed by the Merc Hearse, they may look at the Toyota and think "it's a hybrid, not nicking that' and then bugger off. If they DO open the garage and we're there, then the chime will go off on the alarm, if we are in bed or out, the alarm will go off and I'll get a text. They had better hope I'm not there or they could be looking down the barrel of a Browning 12g pump

(assuming I can find the keys to the bloody cabinet before they clear off)