Fill a Hollow Box (Build a Room)

Create a hollow room or box out of any block

✅ Verified for Java 26.2 · Bedrock 26.32 — checked June 2026

Fills an 11×7×11 hollow box of stone starting at your position — walls, floor, and ceiling only, with empty air inside. Change 'stone' to any block type (oak_wood, bricks, etc.) and adjust the offsets for different room sizes. The 'hollow' mode creates only the shell.

/fill ~ ~ ~ ~10 ~6 ~10 stone hollow

Java: yes
Bedrock: yes
Command block: yes
Needs cheats / OP: yes

How to use

Stand at the corner where you want the box to start.
Open chat (T on Java, / on Bedrock) and paste the command.
Change 'stone' to your desired block and adjust the offsets.
Press Enter — an instant room appears.

Related commands

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Replace One Block Type with Another

Swap every block of one type for another in a region

Clone (Copy) a Structure

Copy a region of blocks and paste it somewhere else

Clear a Region with Air

Delete all blocks in a large area quickly

Fill Area with Water

Quickly fill a region with water

Create Hollow Box (Outline Only)

Build a hollow rectangular frame without solid interior