About these 1.18 seeds
Woodland mansions are among the rarest structures in the game — in a typical world the nearest one is many thousands of blocks away, which is why the game sells you a map to find it. Every seed on this page has a mansion within 1,200 blocks of spawn, with the exact coordinates on the card.
1.18 (Caves & Cliffs Part II) rewrote terrain generation completely: world height stretched to Y −64…319, six new mountain biomes, and cave systems bigger than anything before it. It's also where modern seeds begin — a 1.17 seed generates a totally different world — and 1.18.2 is still a heavily-played modpack version. Every seed below was verified on 1.18 generation itself.
Verified for Java Edition 1.18 (Caves & Cliffs Part II). Biomes, terrain and structure locations are identical across 1.18 – 1.18.2, so 1.18.2 modpack worlds match these maps.
Playing the current version instead? See the latest mansion seeds — or the same list for 1.20 · 1.19 · 1.16. All 1.18 lists live under best 1.18 seeds.
Frequently asked questions
- How is this different from the main mansion seeds page?
- Same criteria, different worldgen: these are separate seeds found and verified on 1.18's generation. Our main mansion seeds list is verified on the current version, and seeds don't transfer exactly between the two.
- Which releases do these seeds work on?
- The whole 1.18 line — 1.18 through 1.18.2, including 1.18.2 modpacks: biomes, terrain and structure positions are identical across the patches (1.18.2 only fixed cosmetic generation bugs like underwater snow patches). Later versions keep the same terrain engine but add structures and tweak placements (1.19's ancient cities, 1.20's trail ruins), so verify on our newer lists if you're playing past 1.18.
- Do these seeds work on Bedrock Edition?
- No — Java and Bedrock generate different worlds from the same seed. These lists are Java Edition only.