* The first level of a house is calculated at 33 dirt. Each additional level adds 30 dirt.
* Brick/Marble bridges require solid walls directly below, for at least two stories of the building. Example: 3-story house can have a door on the first floor, but must have solid walls for the next two floors on the side with a connecting bridge.
* Any bridges connected directly to a structure will disappear upon the structure being destroyed. Bridges connecting to the ground in front of a structure will remain.
* Bridges will only begin to decay after a week of no use.
* Modifying the terrain after planning a bridge will require re-planning the bridge.