Igloo is a small structure that generates in snowy taigas, snowy plains, and snowy slopes. It is made mostly of snow blocks and contains a basic interior with a bed, furnace, crafting table, and a redstone torch for lighting. Windows are made of ice in Java Edition and packed ice in Bedrock Edition.

About half of all igloos include a hidden basement beneath a trapdoor under the carpet. The basement is built from stone bricks, some of which are infested with silverfish. It contains a brewing stand with a splash potion of weakness, a cauldron, a flower pot with a cactus, and a chest holding a golden apple.

Behind iron bars, a villager and a zombie villager are caged, presenting the setup for a curing tutorial. In Java Edition, the villager is a plains-type and unemployed; in Bedrock Edition, the villager is snowy-type with a random profession.

Igloos without basements have a snow block instead of a trapdoor and lack the special features below. The structure can generate partially elevated, with the basement still forming underground.