Underground base: design and construction
How to design and build a safe, practical underground base with easy access to resources.
Overview
An underground base is one of the safest choices in survival mode. It's naturally protected from Creepers, skeletons and other surface mobs, and it gives you direct access to ores. A well-designed underground base combines safety, function and good looks: it doesn't have to look like a hole in the ground.
The ideal depth for an underground base in version 1.18+ is Y 40-50. That's deep enough to avoid stray mobs from the surface, but well above the Deep Dark caves, where the Warden is a threat. At this depth you also have easy access to iron and coal.
The key to the design is keeping the zones apart. Your base should have clearly separate rooms: a living area (bed, crafting, smelting), a storage area (chests, a sorting system), an enchanting area (enchanting table, bookshelves), a farming area (underground farms) and a mining corridor that leads to your mines. Each zone should have its own entrance and an emergency exit to the surface.
Lighting is absolutely crucial. Every block of your base needs a light level of 1 or higher (since version 1.18, hostile mobs spawn only at light level 0). Torches every 12 blocks are enough, but lanterns, glow berries and glowstone look better, and lanterns and glowstone give off more light. For extra safety, also light up the tunnels leading to your base, 50 blocks in every direction from the entrance.
Escape routes are an often-overlooked part of the design. Build at least two exits from your base: a main one and an emergency one. The emergency exit should come out on the surface somewhere other than the main one. Ladders in a vertical shaft are the fastest and cheapest option. Put iron doors with a redstone mechanism on the entrances so mobs can't follow you in.
Topics covered
This guide covers the following Minecraft survival topics:
- Choosing the best depth (Y 40-50)
- Separate zones: living, storage, enchanting, farming
- Lighting and preventing mob spawns
- Entrances and emergency exits
- Iron doors and redstone mechanisms
- Underground food and tree farms
- Water and lava as defenses
Tips and tricks
Tried-and-tested tips from experienced players to use in your own world:
Tip: Water on the floor of your entrance slows mobs down. It's a cheap defense system.
Tip: Glass in the ceiling above your base lets in natural daylight without compromising safety.
Tip: Collect moss and glow berries in Lush Caves: they're the nicest decoration for an underground base.
Tip: Gravel in the ceiling can fall and bury you, so always check what's above you before you expand a room.
Tip: Compasses point to the world spawn point, not to your base. Place a bed in your base so you respawn inside it.
