Chicago's 1909 address renumbering
In 1909, Chicago renumbered every property address in the city to fix a chaotic system where numbers bore no relation to distance. The city adopted a grid based on blocks, with addresses tied to a baseline at State and Madison streets.
Residents and businesses had to update mail, signage, and records across the whole city at once.
The grid-based system became the national model for clear, predictable addressing.
Shows both the disruption of address changes and the reason cities adopt them — this Russell Road case is the same trade-off on a scale of two houses instead of a whole city.
