Zoning Maps

Zoning laws adopted by thousands of local governments across the U.S. govern much of what we build and where. Their effects can extend far beyond neighborhoods; they have implications that impact housing, education, climate change, transportation patterns and the economy – yet can be challenging for residents to grasp.

Zoning maps establish the regulatory requirements for an area, including lot size, building height, architectural design, open space/setback requirements, parking/landscaping areas, utility systems and transportation services. A zoning map amendment process must take place for changes to occur as often as needed if needed to change it – this is often called an amendment.

CRP Professor Sara Bronin and her team at Columbia have launched an unprecedented effort to translate and standardize zoning regulations into a national zoning atlas, providing residents access to local government’s code data, understand its impact, and engage in civic life. This approach is essential given how planning policy changes can only take effect with broad participation – regardless of one’s ability or lack thereof to attend in-person meetings.