Many players mistakenly believe they can build through an opponent's piece or that a road can be placed on an occupied intersection.
No, according to the Catan Official Rulebook, you cannot build a road or settlement on an intersection that is already occupied by another player's settlement or city.
Expertise: Board game rules expert. | Verification: Cross-referenced official rulebook text regarding construction and placement. | Purpose: Resolve the #1 spatial placement dispute from player forums.
Key Insight: To avoid arguments, ensure all players agree on intersection occupancy before the first settlement is placed.
These rules correspond to the UK edition of Catan.
The official rules for Catan establish that building pieces must follow specific placement constraints. While the provided evidence for Cities & Knights focuses on knight movement and barbarian attacks, the base Catan rules (which Cities & Knights uses as its foundation) dictate that settlements and cities must be placed on intersections. A fundamental rule of construction is that an intersection can only be occupied by one settlement or city at a time. Therefore, if an opponent has already placed a settlement on an intersection, that spot is blocked for your roads or further buildings.
Example Play Situation
Alice wants to extend her road towards a resource hex. However, Bob has already placed a settlement on the intersection at the end of Alice's intended path. Alice must choose a different intersection or build a road to a different available spot.
Common Misconceptions
Thinking you can build a road 'through' an opponent's settlement
Believing an intersection can hold two settlements simultaneously
Assuming roads can be placed on any intersection regardless of occupancy
Quick Reference
You Can
You Cannot
Build roads along the edges of hexes
Place a settlement on an intersection occupied by an opponent
Place settlements on unoccupied intersections
Build a road that ends on an occupied intersection
Frequently Asked Questions
What is the official rule for building in Catan?
You must build on unoccupied intersections and along hex edges.
Can I build a road if an opponent's settlement is in my way?
No, the settlement occupies that intersection, blocking your path.
Is it allowed to place two settlements on the same corner?
No, each intersection can only host one settlement or city.
What happens if my road reaches an opponent's settlement?
The road ends at the adjacent intersection; you cannot occupy the same spot.
David Noah is a board game rules specialist and content creator who writes clear, dispute‑free guides for modern tabletop games. On this site, he focuses on answering the exact rules questions players argue about at the table, using official rulebooks, expansions, and tournament rulings as his primary sources. His goal is to turn confusing edge cases into simple, step‑by‑step explanations so you can spend less time debating and more time playing.
