How tall would you say the standard room should be. I go for 4-5 blocks unless making a specific build. Is this good?
I'm not that much of an architect, unfortunately 😅. I didn't inherit my dad's design skills, though I can appreciate a lovely building. But four to five blocks sounds good. While small homes are cozy sometimes they can also feel cramped and uncomfortable. I'd recommend high ceilings.
Though I'd also like to take this opportunity to remind you and my other followers that any space three blocks tall and above always poses a risk of endermen teleporting into your house to escape various hazards such as rain, so just keep that in mind. Make sure you build a two-high area you can hide in if you accidentally make eye contact. It doesn't have to be big, maybe just a closet, but it works in a pinch.
Most building code doesn't require enderman-proofing in three-high spaces inside buildings, since creating a building like that is almost completely impossible. Crafting tables? Teleportable. Carpet? Teleportable. Glass? Teleportable. The upside to this is that endermen are fairly noisy and unsubtle creatures, it's not hard to notice them. As I said before, though, as long as you can hide in a two-high room, you'll be fine.
The blocks in that enderman can pick up are restricted in many cases regarding exterior walls (sorry dirt hut purists) to prevent endermen from creating unsafe holes into your home.
There's one vital rule regarding enderman proofing, and that is about TNT storage. Endermen can pick up TNT blocks, which is not bad on its own unless there's redstone signals within the vicinity, which unfortunately qualifies as anything from bells ringing to doors opening and closing.
Though TNT should normally be stored in item form, any more than five placed TNT blocks should be stored in a room with a two-high ceiling.
I've gotten off topic. What was I talking about again?
TLDR Uhhhh a 4-5 block high ceiling sounds great, do that.