PC Why doesn't this constitute as valid housing?

[Bitzu]

I have a feeling it might have to do with my roof, but I have no idea why. Ignoring how terrible the design looks, is that the problem? Or perhaps it's the glass wall? I have no clue. I've been frustrated, wasting 2 hours trying to figure it out.

 

[Casu]

It might be because it is too big.

 

[Bitzu]

It might be because it is too big.

In that case, would adding platforms 4-5 blocks above the second floor help?

 

[Casu]

In that case, would adding platforms 4-5 blocks above the second floor help?

I think it would.

 

[ppowersteef]

It's indeed too big.
There's a maximum size in rooms, I had that problem too.