DIGITIZING, demystifying, & democratizing the country’s zoning codes.
The National Zoning Atlas makes zoning data actionable and accessible to improve how America uses its land.
WHY FOCUS ON ZONING?
Across the United States, people are struggling with rising housing costs, long commutes, flagging main streets, and environmental hazards. For decades, bad zoning has made these problems worse. But zoning can also be used to drive much-needed change.
The National Zoning Atlas makes zoning data actionable and accessible, giving advocates, policymakers, and researchers a powerful tool that can inform changes to zoning that foster more and better housing, stronger economies, healthier environments, and more connected communities.
TRANSLATING ZONING DATA FOR THE PUBLIC
We dive deep into zoning codes to ensure that researchers, policymakers, and advocates have what they need to understand zoning — and make it better.
DIGITIZE
We centralize zoning code information into a one-stop shop through our online map and related research.
DEMYSTIFY
We standardize information to enable apples-to-apples comparisons of zoning rules.
DEMocratize
We empower advocates with information they need to push for change that harnesses zoning’s powers for good.
THE GOLD STANDARD IN ZONING DATA COLLECTION
Our unique methodology makes the National Zoning Atlas the most comprehensive zoning data set in the country.
Our team extracts accurate, detailed, and timely information from zoning codes across more than 200 regulatory characteristics for each zoning district. We decipher tangled geospatial files; digitize decades-old, hand-drawn maps; and ensure clear and consistent displays of key information on the National Zoning Atlas.
9,700
Jurisdictions Published to the National Zoning Atlas
1,135,000
Pages of Zoning Codes Read
194 million
People Living in Published Jurisdictions
Opinion piece by NZA founder Sara Bronin and research director Scott Markley breaks down NZA findings to show how comprehensive, coordinated zoning reform and can improve livability for the entire region.
Trades reporter covers surprising findings from Zoning Report: Massachusetts including prevalence of large minimum lot requirements and impact of the MBTA Communities Act.
Blog post outlines need for cohesive dataset to identify residentially buildable land, prompted by release of new wetland maps.
Opinion piece by NZA founder Sara Bronin advocates for the completion of an Illinois Zoning Atlas to provide data-backed support for Gov. Pritzker’s “Building Up Illinois Developments” (BUILD) Plan.
Article on Colorado House Bill that would bar most cities from setting minimums of 2,000 square feet for a single-family lot cites NZA finding that 98% of land that allows single-family houses has a minimum lot size requirement.
Article cites NZA as resource for understanding whether communities are prepared for accommodating influx of workforce housing.
Preservation Maryland outlines how data from a Maryland Zoning Atlas could help usher in housing opportunities from Yes In God’s Backyard (YIGBY) policies, citing a comparable analysis from the Virginia Zoning Atlas that did the same.
NZA founder Sara Bronin discusses countrywide NZA discoveries, including Maine’s surprising level of zoning complexity that can impede well-intentioned laws.
CityLab Perspective piece reflects on the state of zoning on the 100th anniversary of the Supreme Court hearing that codified the template for strict separation of land uses (known as Euclidean Zoning), now depicted via the National Zoning Atlas.
Press release reports passage of legislation to remove restrictions that require minimum lot sizes of over 2,000 square feet for single-family homes, citing minimum lot size findings from NZA’s Zoning Report: Colorado.
Assesses NH House Bill to allow low-and no-impact business in homes, citing the New Hampshire Zoning Atlas that found 55% of New Hampshire communities required a special exception or site plan review to open a home-based child care.
Partnership for Strong Communities testimony talking points in favor of S.B. 151 cites NZA data showing prevalence of large lost sizes in CT.
NZA founder Sara Bronin’s testimony in support of a CT bill to prevent minimum lot sizes greater than 5,000 sqft, citing the Connecticut Zoning Atlas which finds 76% of single-family land currently requires minimum lot sizes of 80,000 sqft or more.
Guest column connects Virginia residents’ universal concern over housing costs to restrictive zoning, as spelled out in the Virginia Zoning Atlas.
Opinion piece by NZA founder Sara Bronin takes stock of the newly completed Utah Zoning Atlas, discovering the state’s zoning rules that prohibit affordable housing types on nearly all residential land.
YIMBY blog uses NZA data to investigate rising housing costs in Cache County, Utah, finding most land only allows one kind of home, on large lots, with very little flexibility to add modest new housing.
Recaps advocacy campaign centering creation of the Montana Zoning Atlas that led to transformative statewide land use reforms in 2023 and 2024.
In an opinion piece, NZA founder Sara Bronin offers a roadmap for how Virginia can address housing costs based on findings from Zoning Report: Virginia.
Introduces NZA map and snapshot tools in the context of Indianapolis.
At a talk hosted by Washington College, NZA founder Sara Bronin shared career-long zoning lessons in discussion of Maryland’s Just Communities Act.
Opinion piece by NZA partner Housing North executive director Yarrow Brown sharing how the Northwest Michigan “Housing Zoning Atlas” will support a new, regional approach to planning.
Opinion piece by NZA founder Sara Bronin offering recommendations to the state to help landowners and policymakers address Maine’s convoluted zoning codes.
Discusses new data updates to the New Hampshire Zoning Atlas which reveal only 12% of the state’s buildable land has access to either water or sewer services, and just 5.6% has access to both.
In part two of her interview with New Mexico journalist Stephanie Nakhleh, NZA founder Sara Bronin discusses the links between traffic safety and zoning choices, such as large minimum lot sizes.
Announcement from state atlas funder Virginia Housing celebrating launch of the Virginia Zoning Atlas.
New water and sewer layers available on the NH Zoning Atlas reveal only 5.6% of the buildable land in the state has access to both infrastructure systems, making the case for denser new development.
Applauds NZA for offering internship hours for GW Law Students affected in need of temporary field placements.
New Hampshire Zoning Atlas team has added state’s public water and sewer infrastructure to the NH Zoning Atlas, showing a clearer picture of where new housing can be supported.