Terraria – How to get the NPCs into the sky house

Houses need to fulfill a set of requirements to be considered a proper house. The step-by-step guide to making a house is as follows:

• The room must be at least approximately 42 blocks away from any corruption.

• Build the walls and roof. The room must be five tiles tall at the least, not counting the roof itself.

• The floor cannot be only wood platform, there must be a place for the NPC to stand without him standing on wood platforms. Make sure the room is big enough to be considered a proper house as well.

• Fill in the house with background walls. Any player-placed wall will work.

• Place a light source inside the room. A torch on the wall works fine, but you can also use candles and other such fancy items. You can make said fancy decorations with metals at an anvil.

• Place at least one "Comfort Item"(chair) and a "Flat Surface Item"(table) in the house.

• Place a Door in the house, in one of the walls.

Assuming you've done everything right, the game should treat your room as a house. The first house you build will be taken by the Guide, and any further houses by whichever NPCs appear.

There is also a size limit (60-750 tiles including walls, floor and ceiling), and the first house you build will always go to the guide.

If your demolitionist has claimed a room offscreen, you may need to go far enough away that he teleports 'home'. He's not going anywhere because he can't reach his house in the first place.