How to Build an Iron Farm in Minecraft 1.21

Iron golems spawn based on villager "gossip" and village conditions:

• You need at least 3 villagers
• Each villager needs to be linked to a bed
• Villagers need access to workstations
• A valid 3×4×3 space is needed for the golem to spawn
• Villages attempt to spawn an iron golem every 35 seconds if conditions are met
• Villagers need to be scared (zombie nearby) for optimal spawn rates

1. Build a 3×3×4 enclosed room using solid blocks (stone, cobblestone, or wood). This will house your villagers.
2. Place 3 beds inside the pod, spaced evenly so each villager can access one.
3. Add 3 workstations (any type: lecterns, brewing stands, composters, etc.) next to each bed.
4. Create a small entrance to bring villagers in, then seal it completely afterward.
5. Make sure the ceiling is solid so villagers can't escape.

1. Build a small 2×2×2 glass chamber above or next to the villager pod where villagers can see the zombie.
2. Lure a zombie into the chamber and name it with a name tag to prevent despawning.
3. Seal the chamber completely. The zombie must be visible to villagers but unable to reach them.
4. Ensure there's at least 1 block gap between the zombie and villagers.

1. Above the villager pod, create a 16×16 flat platform made of solid blocks (like stone or wood).
2. The platform should be 3-4 blocks above the villagers' heads.
3. Make sure the platform is well-lit to prevent other mob spawns.
4. In the center of the platform, create a 3×3 hole where golems will fall through to the killing chamber.

1. Below the 3×3 hole in the spawning platform, build a 3×3 chamber that's 4-5 blocks tall.
2. At the top of this chamber (where golems fall in), place a lava source block so it flows down one block.
3. Place signs or trapdoors 2 blocks below the lava to stop it from flowing all the way down.
4. This creates a "lava blade" that kills golems without destroying the drops.

1. At the bottom of the killing chamber, place hoppers to collect iron and poppies.
2. Connect the hoppers to a chest (or double chest) for storage.
3. Make sure all drops can reach the hoppers - you may need to add water streams if needed.
4. Test the collection system by throwing items down the shaft to ensure they reach the chest.

1. Bring 3 villagers into the villager pod (use boats or minecarts for easy transport).
2. Name each villager with a name tag to prevent despawning.
3. Seal the villager pod completely - no gaps or openings.
4. Light up the surrounding area (80 block radius) to prevent interference from other villages.
5. Wait for villagers to link to beds and workstations (green particles appear).
6. After a few minutes, iron golems should start spawning!