I don't do "too" much in terms of apt maintenance, but I am a tinkerer, and I fix my own cars - so I do have a sizable tool collection.
2BR apt for a married couple, no kids. I have been given the "laundry room" for my tools, which is barely sufficient. I have a good sized toolbag that has the typical screwdrivers/basic small socket set/ratcheting driver and bits, wire cutters/crimpers/terminals, heat shrink/gun, gas soldering iron/solder, spare network cables, ferrule tool, crescent, vice grips, small box end wrenches.
I also have a small and large tool "chest" type box in the large box is the larger tools (1/2" ratchets, deep sockets, anything >16mm) torque wrench, brake tools, large wrenches, hammers, cheater bar, breaker bars, torch, and anything automotive specialty stuff.
The smaller one has 1/4" and 3/8" ratchets and sockets, most of the rest of the screwdrivers, small automotive stuff (hubcap lock tool, torx bits, etc)
Anything else gets put in various bins and buckets that go on the shelf. Wife continuously nags me about that space I can never keep it clean and organized enough for her.
I'd love an outside closet on the patio, but I'd be afraid somone would walk off with the whole thing.