How to Make a House in Terraria
How to Make a House in Terraria
⚡ QUICK ANSWER
A valid house in Terraria needs: walls on all sides (background walls, not just blocks), a light source, a table, a chair, and a door or platform entrance. Minimum size is 6 tiles wide × 4 tiles tall (interior). Once built, open the Housing menu and assign an NPC to move in.
| Requirement | Examples |
|---|---|
| Enclosed structure | Wood, Stone, or any solid blocks for walls/floor/ceiling |
| Background walls | Wood Wall, Stone Wall (must be player-placed — natural walls don’t count) |
| Light source | Torch, Lantern, Candle, any placed light item |
| Table (flat surface) | Work Bench, Table, Piano, Dresser — any flat furniture |
| Chair (comfort item) | Wooden Chair, Toilet, Bench, Throne |
| Entrance | Door or Wood Platforms as floor/ceiling |
| Minimum size | 6 tiles wide × 4 tiles tall (interior space) |
How to Build a Valid House — Step by Step
Gather your building materials
For your very first house you only need Wood — chop trees to collect at least 50–80 Wood. At your Work Bench craft Wood Walls (1 Wood = 4 Wood Walls), a Wooden Door (6 Wood), a Work Bench (already have it), a Wooden Chair (10 Wood), and Torches (you need a Gel from slimes + Wood: 3 Torches per craft). This is everything needed for a basic functional house.
🌲 Total wood needed: ~60–80 for a complete starter houseBuild the outer shell
Choose a flat surface and place solid blocks to form a rectangle — walls, floor, and ceiling. A good starter size is 10 tiles wide × 6 tiles tall (interior), which gives comfortable space for furniture and looks clean. Use Wood blocks for everything at this stage. Leave a one-tile gap in one wall where the door will go — place it two tiles from the floor so the NPC can walk through it.
📐 Good starter size: 10 wide × 6 tall interiorPlace background walls inside
This is the step most beginners miss. The house needs player-placed background walls covering the entire interior — natural dirt or stone walls that generate with the world do not count for NPC housing. Select Wood Wall from your hotbar and right-click to paint the entire back of the interior. Every tile of the back wall must be covered or the house check will fail.
⚠️ Natural background walls do NOT count — must be player-placedAdd a door
Place a Wooden Door in the gap you left in the outer wall. Doors need a 3-tile tall gap (the door itself is 3 tiles tall). If your ceiling is too low, use Wood Platforms as the floor instead of solid blocks — platforms count as a valid entrance and let NPCs path through them. Platforms are often easier than doors for compact houses.
🚪 Alternatively: use Wood Platforms as floor for an entrancePlace the required furniture
Inside the house place all three required items: a light source (hang a Torch on the wall or place a Lantern), a flat surface (your Work Bench already counts — or place a Table), and a comfort item (place a Wooden Chair next to the table). These three items together with the enclosed space and background walls satisfy all NPC housing requirements.
✅ Required: light source + flat surface + comfort itemCheck the house and assign an NPC
Open the Housing menu (the small house icon in the top-right of the screen, or press Esc and select it). Click the question mark icon, then click on your house to check if it is valid — a green message means it passed, a red message tells you what is missing. Once valid, click the banner icon and then click inside the house to assign a specific NPC, or simply wait for one to move in automatically when conditions are met.
🏠 Housing menu → question mark → click house to validatePro Tips
Build a multi-room tower early on — stack 4–6 rooms vertically and separate them with solid floors. Each room shares the outer walls, making it very efficient on materials.
NPCs reduce enemy spawn rates nearby, so having more NPCs housed near your base keeps your crafting area safer — especially important at night and during blood moons.
In Hardmode, Corruption and Crimson can spread to Wood walls and corrupt your NPC houses. Consider rebuilding town walls with non-corruptible materials like Stone or Brick in late game.
A Bed (crafted at a Sawmill: 15 Wood + 5 Silk) placed in a house lets you set your spawn point there — far more useful than the default spawn. Make one as soon as you have a Sawmill.
The Nurse NPC moves in once you reach 100 HP — she heals you for coins, which is extremely useful during boss fights if you place her near your arena.
Houses in Terraria are more than just shelter — they are the engine of your NPC system, which in turn drives your entire economy and progression. The Merchant sells basic supplies, the Demolitionist provides explosives, the Goblin Tinkerer reforges accessories, and the Wizard sells magic items. Every NPC requires a valid house to move in, so building a proper town early unlocks services that make every part of the game easier. Spend time on your first night building several rooms rather than just one, and you will have NPCs arriving within the first few days of the playthrough.
Frequently Asked Questions
Why won’t my house pass the housing check in Terraria?
The most common reasons are missing background walls (natural walls don’t count — you must place them yourself), the room is too small (minimum 6 × 4 interior tiles), a missing light source, table, or chair, or there is no valid entrance (door or platforms).
How many NPCs can live in one house?
Only one NPC can occupy a single house at a time. Each NPC needs its own separate valid room. You can share outer walls between rooms to save materials when building a multi-room structure.
Can you build a house underground in Terraria?
Yes, underground houses work perfectly. NPCs can live anywhere as long as the room meets all housing requirements. Underground NPC towns are a popular building style and function identically to surface houses.
What is the minimum house size in Terraria?
The minimum interior size is 6 tiles wide and 4 tiles tall, for a total interior area of at least 60 tiles (width × height must exceed 60). Most players build slightly larger — around 8 × 5 — to comfortably fit all required furniture.