How a National Zoning Atlas Can Clarify a Legal Patchwork

A massive effort is underway to compile local zoning regulations and other laws that impact how and where housing is built.

1 minute read

February 1, 2024, 12:00 PM PST

By Diana Ionescu @aworkoffiction


Close-up of colorful zoning map of unidentified city.

Olivier-Tuffé / Adobe Stock

Historically left to local jurisdictions, zoning laws are now being assessed at the state and even national level as the housing crisis reaches all corners of the country. Could a ‘national zoning atlas’ spur change?

Kriston Capps describes the project in an article for Bloomberg CityLab, writing that “when complete, [the project] will offer users a neighborhood-level view of the zoning codes set by some 30,000 different local governments.” Teams in at least 25 states are working to compile this data, inspired by a Connecticut project. “[B]y pairing zoning maps with census data and other sources, researchers can shine a light on specific problems or places — and in at least a couple states so far, mapping out zoning codes has led to real change.”

The atlas could become an important tool because “Most local governments don’t fully understand their own zoning rules, which can be byzantine documents with fragmented, antiquated or contradictory rules accreted over decades.” 

Monday, January 29, 2024 in Bloomberg CityLab

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

June 11, 2025 - Diana Ionescu

Metrorail train pulling into newly opened subterranean station in Washington, D.C. with crowd on platform taking photos.

Congressman Proposes Bill to Rename DC Metro “Trump Train”

The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

June 2, 2025 - The Hill

Large crowd on street in San Francisco, California during Oktoberfest festival.

The Simple Legislative Tool Transforming Vacant Downtowns

In California, Michigan and Georgia, an easy win is bringing dollars — and delight — back to city centers.

June 2, 2025 - Robbie Silver

Color-coded map of labor & delivery departments and losses in United States.

The States Losing Rural Delivery Rooms at an Alarming Pace

In some states, as few as 9% of rural hospitals still deliver babies. As a result, rising pre-term births, no adequate pre-term care and harrowing close calls are a growing reality.

6 hours ago - Maine Morning Star

Street scene in Kathmandu, Nepal with yellow minibuses and other traffic.

The Small South Asian Republic Going all in on EVs

Thanks to one simple policy change less than five years ago, 65% of new cars in this Himalayan country are now electric.

June 15 - Fast Company

Bike lane in Washington D.C. protected by low concrete barriers.

DC Backpedals on Bike Lane Protection, Swaps Barriers for Paint

Citing aesthetic concerns, the city is removing the concrete barriers and flexposts that once separated Arizona Avenue cyclists from motor vehicles.

June 15 - The Washington Post