I live in a condo (townhouse) and you will need to check the CC&R's of the communities you are considering. The rules and the way they are enforced vary widely from HOA to HOA...in my area there are HOAs where you can be fined for having your garage door open for more than 15 minutes!
Generally speaking you own the interior surfaces in your garage, if you keep your door closed, no problem. Your air compressor might be though (noise), flammable liquid storage might be also, where you park your vehicle while your working on your garage might be an issue too...sometimes guest parking really means only guests park there.
I'm very lucky to live in a community that is garage friendly, I have a sink in my garage, 220v power, extra storage under my unit, and my own driveway where I can park two cars overnight. I can work on my car, wash my car, weld, build, etc. That's really rare...to make sure things stay this way I did something I swore for years I would never do, I joined the board of directors!
If you find a place you want to live in, I would take a walk through it on a nice Saturday afternoon when people who are so inclined would be working in their garages and talk to them. And if you find a place you like and move there keep in mind that some of your neighbors will believe that garages are for parking your car only...if you really want a workshop your should have bought a house somewhere else. A little good will can go a long way with those folks, maybe offer to rotate their tires on your lift, get involved with your community, join the board. Be one of the go to guys rather than the annoying dude with the loud compressor and impact gun.
Hope you found some of this useful!
