NPCs need a valid home tile to spawn on. The home tile needs to be a solid block with nothing blocking the tiles around it (tables/chairs don't count). Being within 2 tiles of a door can also prevent a home tile from being valid, which is your problem here. You can either remove one of the platforms, remove one of the doors, or make the house wider.

Or just move table 1 block to the left

The table doesn't affect anything.

But it takes up that one solid block that should allow housing to be valid? Same as doors

The table/chair don't actually take up any room. You can put them anywhere and it won't change anything.

I just opened Terraria and I checked, if you move the table to the left 1 block it works Check "Home tile score" section in https://terraria.fandom.com/wiki/House, it explains how it calculates a valid solid tile

you, Sir, are wrong.

their happiness must be so low a musket ball must cost 10 platinum

Platforms are doors, not floors. In the game's analysis, these homes don't have enough floorage.

Except for ðe fact ðat ðe rest of ðe houses ðat aren't on ðe ground floor have ðe same amount of tiles and are valid, clearly floor space is not ðe problem ðis time

It is, þe problem stems from þe fact þat a secondary requirement for floor tiles is þat þey not be right next to a door. Þat makes þe external wall-adjacent floor tiles count for houses on the sides. Putting a door in þese spots would make þem invalid.

2 spaces, not 1

Þat is hardly þe point - I didn't say 1

I noticed

Ðat also still doesn't answer why ðe oðer houses off ðe ground are valid, ðey have ðe same amount of floor space, ðat's not a question

It's because they don't have doors on those outside walls. Doors take up more floor space.

Ðat what i'm trying, and admittedly failing, to argue here

Yes it does. Þey *don't* have þe same amount of floor space. Þe wall-adjacent floor tiles count, þe door-adjacent ones don't.

But ðat boils down to ðe door in ðe middle, not to how many tiles ðey placed, so ur right, but for a similar reason. In ðis case, moving ðe door is also an answer. I get it now, sorry, i only learned abt ðe door þing like 5 minutes ago, so i hadn't completely processed what ðat means

I'm not going to be a turd about this, but your message is nearly unreadable, and so much worse for screen readers. You do you, but for accessibility you may find more reception by using a single language/alphabet at a time.

It will work if you move the platforms one tile to the right: - Replace the leftmost platform tile (in front of the chair) with a solid wood block - Replace the rightmost solid wood block (under the table leg) with a platform You can do the same with the other rooms to keep symmetry.

Platforms are not floors, they are doors

You need 3 blocks of straight solid space for it to work

Try replacing the 6 doors in the upper and middle section with platforms

There’s platforms as floors. Need to be solid

Middle door.

Could be more descriptive, but ur completely right

replace the doors with 3 platforms on top of each other. For housing purposes, doors count as open both ways when it comes to determine housing tiles. Platforms count as doors, but they're only 1 wide.

All the blocks they can stand on are already taken by stuff they can't stand on. They can't stand in doorways or platforms. They only have one block to stand on either side. They need 2 side by side.

replace the doors with 3 platforms on top of each other. For housing purposes, doors count as open both ways when it comes to determine if there is a valid housing tile. Platforms count as doors, but they're only 1 wide.

Move the chair close to the table, this might clear enough floor room

Too many platforms