One of the first things you’ll want to do in Terraria is make a house, so you can hide out from monsters at night. Our Terraria house building guide explains how to build a house using blocks and walls, as well as add details like doors and stairs to your base.
To make a house that will shield you from monsters, all you need are blocks of any kind. Note that blocks and walls are two different things. Walls will place walls behind you, which allow you to hang torches, paintings, and other wall decorations. Blocks are the squares that make up the terrain in Terraria, and you can pick them up using your Pickaxe.
Using blocks, you can make a square room around you to shield yourself for an evening, but eventually, you’ll want to turn your house into a base of sorts with different crafting stations and chests to store items.
To place a door, you’ll need a block to hold it up on both the top and bottom. You can do this easily by building a small wall of blocks, getting rid of three of them in the middle, and then placing the door in the newly created hole.
For stairs, you’ll need to place Platforms in a diagonal pattern. Then you can use your Hammer on the Platform to turn them into stairs facing either directions. To get rid of any Platform, you’ll need to use your Pickaxe.
As you decorate your house and fill it with furnishings, you may notice a NPC merchant or two move in. These will occupy any room that has a door, a table, a chair, and a light source, so you’ll have to relocate them if you don’t want them living in your house.