House



A Home is a structure built by the player that can serve as a spawn point for NPCs. The NPCs require an unoccupied Home before they can appear (with the exception of the Guide,goblin tinkerer,wizard and mechanic).

You can check if a house is suitable with the Housing Menu, although additional steps may be needed to place an NPC Flag.

Requirements
A structure must meet numerous requirements in order for the game to recognize it as a proper home suitable for spawning NPCs.

Size
A home needs to be at least 6 blocks tall and 8 blocks wide, or 5 blocks tall and 7 blocks wide; not including walls, floor or ceiling.

Including the floor, side walls and ceiling, a home must have at least 60 total tiles, but less than 1900.

Framework


A house must be fully enclosed:


 * The side walls (vertical blocks) can be made of blocks, doors or wood platforms.
 * The floor and ceiling (horizontal blocks) can be made of blocks or wood platforms.

Entrance
A house must have at least one entrance, which can be a door in a wall or a wood platform in the ceiling or floor.

Background Wall


A house must have a background wall in order to be suitable. Any walls crafted or mined by the player are valid, when placed.


 * Walls not placed by a player (such as naturally-occurring dirt walls) do not count, with the exception of those generated in Floating Island structures, Dungeon Walls or the planked walls found in Underground Cabins.
 * Background walls may contain holes if the holes are no larger than 4 tiles (e.g. 4 background tiles across and down, which is 2x2 wall pieces).
 * Walls may have multiple holes as long as they are separated by at least a single tile of background walls.
 * Having background holes will sometimes allow monsters to spawn within the Home.

Furniture
A home must have at least one Comfort item and Flat Surface item.

Comfort items
At least one Comfort item must be placed in a Home. Currently the following items may function as Comfort items:


 * Chair
 * Throne
 * Bench
 * Bed
 * Toilet

Flat Surface items
At least one Flat Surface item must be placed in a Home, and the Flat Surface item can not be entirely placed on wooden platforms. Currently the following items may function as Flat Surface items:
 * Table
 * Dresser
 * Workbench
 * Bathtub
 * Bookcase
 * Piano

Light Source
A home must have at least one light source. A Furnace, Lamp Post, Disco Ball or Glowstick will not work for this purpose.

Location
If a house's "Corruption Rating" is too high, it becomes uninhabitable: Building too closely to ebonstone, ebonsand or corrupted vines/plants increase a home's Corruption Rating by 1 for each corrupt tile. Conversely, nearby Hallow tiles reduce Corruption Rating: Each sunflower reduces a home's Corruption Rating by 5; and each tile of hallowed grass, pearlsand and hallowed plants reduce the rating by 1. The net Corruption Rating must be 250 or less.

Simplest valid option
Materials required:
 * 25 Dirt Block for floor, wall and ceiling.
 * 32 Dirt Wall (8 Dirt Block) for background wall.
 * Wood Platform (2 Wood).
 * Wooden Chair (4 Wood).
 * Wooden Table (8 Wood).
 * Torch (1 Wood, 1 Gel, results 3).

Summary raw materials:
 * 33 Dirt Block
 * 15 Wood
 * 1 Gel