How do building privileges and build zones work?

Every TC creates a build-zone around the structural elements of the building it's in. Inside that zone:

  • Only players authorized by the TC can place new structures, doors, deployables, or another TC

  • Unauthorized players will see "Building Blocked" when trying to place

  • Decay is paused as long as the TC is fed with resources

The zone follows the structural shape of the building - not a fixed radius. Each foundation, wall, or floor that belongs to the TC's building extends the zone around itself.

If your building splits, each separated part keeps its own build-zone only if it has its own TC. Parts without a TC are unprotected - decay starts, and others can build nearby.

See also: Why did my base split into multiple buildings? · Why can't I place a Tool Cupboard?

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