City rules

Building Cities
The greatest asset of any kingdom are its cities, for it is here that the bulk of a kingdom’s citizens live, its armies train, its culture develops, and its future is forged. The rules presented here are designed to support the rules for kingdom building presented in the first portion of this article and to give players a visual representation of a city (the city grid) they helped to build up from scratch.

Reading the Grid
The city grid consists of 36 city blocks, each arranged into nine larger squares. Each block is separated by alleys, while each square is separated by streets. The nine squares themselves are in turn bordered by four sides—each side represents a border to the entire city district. A district border can represent a city wall, a river, a lake or ocean shore, a cliff, or merely the transition from one city district into another. For larger cities, you can prepare multiple districts sharing common borders.
As the PCs build structures and locations, they can place cut-out representations of their buildings into these city blocks, eventually creating a visual representation of their completed city.

Preparing the Site
Once you select a location for your city (which must be in a hex you have explored and cleared), you must pay to have the site cleared and prepared to support the city’s roads and buildings. The cost and time required to clear space in various terrains is detailed on the table below.

Base Value
When using these rules to build a settlement, the city’s base value (see Pathfinder RPG Core Rulebook, pages 460–461) starts at 200 gp. It increases as you construct certain buildings, like shops and marketplaces.

Building A City
Once you’ve prepared your city district, you can start to build. The placement of buildings in your district is left to you, but two-block and four-block structures cannot be split up (although they can span streets). When you decide to place a building, you can use the cut-out icon for the appropriate type of structure and affix the building where you wish in your city grid. It takes 1 month to construct a building, no matter what size the building is—its benefits apply immediately.
Population: A city’s population is equal to the number of completed blocks within its districts × 250. A city grid that has all 36 blocks filled with buildings has a population of 9,000.
Defensive Modifier: A city’s Defensive Modifier can be increased by building certain structures (such as city walls).
Base Value: The base value associated with a city built in this manner is tied not to its size but rather to the number of Economy-based buildings it has. Each such building, whether it’s a shop, tavern, or brothel, increases a city’s base value. Any magic item equal to or lower than this base value in cost is available for purchase 75% of the time — this check may be made again every month (as new stock comes and goes). Any non-magical item from the equipment chapter in the Pathfinder RPG Core Rulebook is always available if its cost is lower than the city’s base value. Cities with multiple districts add the individual base values of each district together to determine the entire city’s base value, with an upper limit of 16,000 gp per city.
At the GM’s whim, using construction magic (such as a lyre of building or spells like fabricate or wall of stone) can reduce the cost of a building’s BP by 2 (minimum of 0 BP). This is a one-time reduction, regardless of the amount of magic used.

City rules

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