Underground Base
A fully concealed underground base with multiple rooms, hidden entrance, internal lighting, and storage areas. Completely mob-proof when sealed properly.
Overview
The Underground Base is a house build aimed at a place to live, store loot and sleep safely through the night, and its character comes mainly from how the stone brick is shaped and detailed. At 20x8x16 blocks (20 wide, 8 tall and 16 deep) it is large, covering a 320-block footprint on the ground.
It is rated intermediate: nothing here is exotic, but you will need a steady supply of materials and a little patience with shaping, depth and interior detail to make it look right. Following the 20 steps below, plan for about 60-90 min. Because the shell of the Underground Base is mostly stone brick, every block is renewable and cheap to gather, so this is a sensible survival home rather than a creative-only showpiece.
The bulk of the work is the 256 stone bricks that form the main body, alongside 6 different materials in total (about 458 blocks and items all told). Lighting comes from lantern, which both finishes the look and stops mobs spawning in or on the build.
Materials Needed
Gather the 256 stone bricks first, since it is the most-used block; the remaining 5 materials are accents and fittings used in smaller amounts. Mine roughly 10-15% extra of the main block to cover mistakes and a few decorative changes on a build this size. Make sure the glass are crafted ahead of time, as those are the pieces most likely to be missing mid-build. Quantities are sized for the dimensions shown, so scale them up proportionally if you build a larger version.
| Material | Quantity |
|---|---|
| Stone Bricks | 256 |
| Deepslate Bricks | 128 |
| Glow Lichen | 24 |
| Lantern | 16 |
| Iron Door | 2 |
| Glass | 32 |
Click any material to view it on the Items database.
Step-by-Step Overview
A high-level construction order for the Underground Base, from the ground up. Each phase below covers several of the 20 in-game steps.
- 1Lay out the 20x16 footprint of the Underground Base and build the floor first, so you can judge the room sizes before committing to walls.
- 2Raise the outer walls in stone brick to 8 blocks, leaving gaps where the door and windows will sit.
- 3Fit the glass into the window gaps and frame them with slabs, stairs or trapdoor shutters so the Underground Base gains depth.
- 4Add the pitched or sloped roof in matching stone brick stairs and slabs, overhanging the walls of the Underground Base by a block so it casts a shadow line.
- 5Furnish the interior with the bed, crafting table, furnace and chests you need, then finish the outside of the Underground Base with paths, plants or a low fence.
Build Tips
- 1Dig at Y=20 for minimal water and lava interference.
- 2Use glow lichen and sea lanterns for ambient lighting.
- 3Create a hidden piston door entrance for security.
- 4Leave space for expansion, underground bases grow fast.
Tips & Variations
Keep mobs out by spacing your lantern so no floor tile or nearby surface in the Underground Base sits below light level 1; a single dark corner is all it takes for something to spawn inside.
To resize the Underground Base, keep its 20x16 proportions and grow both axes together; stretching one direction alone tends to make it look thin. A half-size or double-size version both work as long as you scale the 458-block material list to match.
For a different look, swap the stone brick in the Underground Base for another palette that fits your biome: the shape stays identical, but the colour and texture of the main block changes the whole feel of it.
The flat-box trap is the thing to avoid: break the long stone brick walls of the Underground Base with depth changes, stairs, slabs and trim, and overhang the roof by a block so it casts a shadow line instead of reading as a plain cube.
Frequently Asked Questions
How hard is the Underground Base build?
It is rated intermediate: nothing here is exotic, but you will need a steady supply of materials and a little patience with shaping, depth and interior detail to make it look right. It is laid out in 20 steps and takes about 60-90 min to finish.
What blocks do you need for the Underground Base?
The main block is stone bricks (around 256), and the full list runs to 6 materials — mostly stone bricks, deepslate bricks and glass. Altogether that is roughly 458 blocks and items; the complete table with exact counts is above.
How big is the Underground Base?
It measures 20x8x16 blocks — 20 wide, 8 tall and 16 deep — which is large and takes up a 320-block footprint. You can shrink or enlarge it by keeping those proportions.
Is the Underground Base survival-friendly?
Because the shell of the Underground Base is mostly stone brick, every block is renewable and cheap to gather, so this is a sensible survival home rather than a creative-only showpiece.
What biome or setting suits the Underground Base best?
Because the Underground Base leans on stone brick, it sits most naturally wherever that material reads as "local" — but it is portable: swap the palette to your biome's blocks and the same shape works anywhere.
What makes the Underground Base different from similar builds?
It is best understood through its focus on underground, hidden and secure. Those traits drive the material list and layout described above, and are what set this house build apart from a generic underground build.
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