National Zoning Atlas
@zoningatlas.bsky.social
The National Zoning Atlas is a collaborative of researchers digitizing, demystifying, & democratizing ~30,000 U.S. zoning codes. Explore our interactive map at zoningatlas.org/atlas.
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EXPLORE THE ATLAS — National Zoning Atlas
zoningatlas.org
👋 Bluesky! We’re the National Zoning Atlas, a dynamic research collaborative working to digitize, demystify, and democratize all America's #zoningcodes.
Explore our interactive map at zoningatlas.org/atlas.
Explore our interactive map at zoningatlas.org/atlas.
and for additional volunteer support from Code with the Carolinas & The University of North Carolina at Charlotte.
For more information on the North Carolina Zoning Atlas, visit: www.zoningatlas.org/north-carolina
For more information on the North Carolina Zoning Atlas, visit: www.zoningatlas.org/north-carolina
North Carolina Zoning Atlas — National Zoning Atlas
The North Carolina Zoning Atlas is a project of the National Zoning Atlas, which aims to digitize, demystify, and democratize information about zoning conditions in more than 30,000 U.S. jurisdictions...
www.zoningatlas.org
January 6, 2026 at 2:55 PM
and for additional volunteer support from Code with the Carolinas & The University of North Carolina at Charlotte.
For more information on the North Carolina Zoning Atlas, visit: www.zoningatlas.org/north-carolina
For more information on the North Carolina Zoning Atlas, visit: www.zoningatlas.org/north-carolina
This milestone reflects countless hours of work that began in 2023 & was carried out by an extraordinary team of staff & volunteers. We’re deeply grateful to the NC Association of Realtors & arnoldventures.bsky.social for the support that made this project possible—
January 6, 2026 at 2:55 PM
This milestone reflects countless hours of work that began in 2023 & was carried out by an extraordinary team of staff & volunteers. We’re deeply grateful to the NC Association of Realtors & arnoldventures.bsky.social for the support that made this project possible—
This Atlas now provides the most comprehensive, publicly accessible view of zoning across the state. During the webinar, we’ll highlight first-of-their-kind statewide & regional zoning findings & discuss how advocates can use NZA tools to guide research, policy, & informed local decision-making.
January 6, 2026 at 2:55 PM
This Atlas now provides the most comprehensive, publicly accessible view of zoning across the state. During the webinar, we’ll highlight first-of-their-kind statewide & regional zoning findings & discuss how advocates can use NZA tools to guide research, policy, & informed local decision-making.
We're starting 2026 the best way we know how: a State Zoning Atlas Launch!🎉
Join us this Thursday, 1/8 for a webinar marking the completion of the North Carolina Zoning Atlas. Covering 652 jurisdictions, NC represents our largest analysis effort to date.
Register: us06web.zoom.us/webinar/regi...
Join us this Thursday, 1/8 for a webinar marking the completion of the North Carolina Zoning Atlas. Covering 652 jurisdictions, NC represents our largest analysis effort to date.
Register: us06web.zoom.us/webinar/regi...
January 6, 2026 at 2:55 PM
We're starting 2026 the best way we know how: a State Zoning Atlas Launch!🎉
Join us this Thursday, 1/8 for a webinar marking the completion of the North Carolina Zoning Atlas. Covering 652 jurisdictions, NC represents our largest analysis effort to date.
Register: us06web.zoom.us/webinar/regi...
Join us this Thursday, 1/8 for a webinar marking the completion of the North Carolina Zoning Atlas. Covering 652 jurisdictions, NC represents our largest analysis effort to date.
Register: us06web.zoom.us/webinar/regi...
We’re proud to share we've been included in the Center for High Impact Philanthropy’s 2026 High Impact Giving Toolkit!
Thank you to CHIP for spotlighting the role better data can play in shaping more equitable housing and land use policy.
www.impact.upenn.edu/national-zon...
Thank you to CHIP for spotlighting the role better data can play in shaping more equitable housing and land use policy.
www.impact.upenn.edu/national-zon...
National Zoning Atlas - Center for High Impact Philanthropy - University of Pennsylvania
www.impact.upenn.edu
December 29, 2025 at 2:25 PM
We’re proud to share we've been included in the Center for High Impact Philanthropy’s 2026 High Impact Giving Toolkit!
Thank you to CHIP for spotlighting the role better data can play in shaping more equitable housing and land use policy.
www.impact.upenn.edu/national-zon...
Thank you to CHIP for spotlighting the role better data can play in shaping more equitable housing and land use policy.
www.impact.upenn.edu/national-zon...
Reposted by National Zoning Atlas
Now @abigailspanberger.com has a roadmap for fulfilling her campaign promises on housing. Last month, @zoningatlas.bsky.social released a statewide report & public map that documents VA zoning (www.zoningatlas.org/virginia). Read our op-ed in @pilotonline.com!:
www.pilotonline.com/2025/12/17/c...
www.pilotonline.com/2025/12/17/c...
Virginia Zoning Atlas — National Zoning Atlas
The Virginia Zoning Atlas is a project of the National Zoning Atlas, which aims to digitize, demystify, and democratize information about zoning conditions in more than 30,000 U.S. jurisdictions. The ...
www.zoningatlas.org
December 22, 2025 at 7:26 PM
Now @abigailspanberger.com has a roadmap for fulfilling her campaign promises on housing. Last month, @zoningatlas.bsky.social released a statewide report & public map that documents VA zoning (www.zoningatlas.org/virginia). Read our op-ed in @pilotonline.com!:
www.pilotonline.com/2025/12/17/c...
www.pilotonline.com/2025/12/17/c...
There’s still a long way to go in tackling our most pressing housing challenges, but we won’t stop doing what we do best: digitizing, demystifying, and democratizing our nation’s zoning codes.
December 19, 2025 at 5:59 PM
There’s still a long way to go in tackling our most pressing housing challenges, but we won’t stop doing what we do best: digitizing, demystifying, and democratizing our nation’s zoning codes.
What a year! We’re deeply grateful to our national audience, partners, and supporters who make our work possible and inspire us to improve our tools and accessibility. But most of all, we want to thank the advocates and changemakers using NZA tools to push for much needed zoning reforms.
December 19, 2025 at 5:59 PM
What a year! We’re deeply grateful to our national audience, partners, and supporters who make our work possible and inspire us to improve our tools and accessibility. But most of all, we want to thank the advocates and changemakers using NZA tools to push for much needed zoning reforms.
🏛️ Meet our new sister Atlas, the National Preservation Atlas!
We officially launched the National Preservation Atlas, the first public repository of standardized data on historic places and their legal protections. A public map is coming in early 2026—stay tuned.
www.preservationatlas.org
We officially launched the National Preservation Atlas, the first public repository of standardized data on historic places and their legal protections. A public map is coming in early 2026—stay tuned.
www.preservationatlas.org
National Preservation Atlas
The National Preservation Atlas is documenting, illuminating, and accelerating historic preservation activity in the United States. By shining a light on preservation at the local, state, and national...
www.preservationatlas.org
December 19, 2025 at 5:59 PM
🏛️ Meet our new sister Atlas, the National Preservation Atlas!
We officially launched the National Preservation Atlas, the first public repository of standardized data on historic places and their legal protections. A public map is coming in early 2026—stay tuned.
www.preservationatlas.org
We officially launched the National Preservation Atlas, the first public repository of standardized data on historic places and their legal protections. A public map is coming in early 2026—stay tuned.
www.preservationatlas.org
📊 We launched a first-of-its-kind data resource.
We debuted Zoning Snapshots, an automated data visualization tool that makes it easy to explore & compare zoning patterns across cities, counties, metros, & states.
www.zoningatlas.org/snapshots
We debuted Zoning Snapshots, an automated data visualization tool that makes it easy to explore & compare zoning patterns across cities, counties, metros, & states.
www.zoningatlas.org/snapshots
National Zoning Atlas Zoning Snapshots — National Zoning Atlas
"Zoning Snapshots" summarize data collected by the National Zoning Atlas team - and can be generated by the user for every jurisdiction, county, or metropolitan area covered by the NZA.
www.zoningatlas.org
December 19, 2025 at 5:59 PM
📊 We launched a first-of-its-kind data resource.
We debuted Zoning Snapshots, an automated data visualization tool that makes it easy to explore & compare zoning patterns across cities, counties, metros, & states.
www.zoningatlas.org/snapshots
We debuted Zoning Snapshots, an automated data visualization tool that makes it easy to explore & compare zoning patterns across cities, counties, metros, & states.
www.zoningatlas.org/snapshots
💪 Our analysis helped inform real change.
In 2025, we published our first reports and briefs using NZA data, and began offering recommendations for how to build more inclusive communities through zoning.
www.zoningatlas.org/resources
In 2025, we published our first reports and briefs using NZA data, and began offering recommendations for how to build more inclusive communities through zoning.
www.zoningatlas.org/resources
RESOURCE LIBRARY — National Zoning Atlas
Visit the National Zoning Atlas Resource Library, which highlights NZA research, collaborative research, and webinars.
www.zoningatlas.org
December 19, 2025 at 5:59 PM
💪 Our analysis helped inform real change.
In 2025, we published our first reports and briefs using NZA data, and began offering recommendations for how to build more inclusive communities through zoning.
www.zoningatlas.org/resources
In 2025, we published our first reports and briefs using NZA data, and began offering recommendations for how to build more inclusive communities through zoning.
www.zoningatlas.org/resources
😵💫 We hit mind-boggling milestones.
Our analysts logged their 1,000,000th page of zoning text, with analysis surpassing 1 billion acres of land! Thanks for the boost, Alaska.
Our analysts logged their 1,000,000th page of zoning text, with analysis surpassing 1 billion acres of land! Thanks for the boost, Alaska.
December 19, 2025 at 5:59 PM
😵💫 We hit mind-boggling milestones.
Our analysts logged their 1,000,000th page of zoning text, with analysis surpassing 1 billion acres of land! Thanks for the boost, Alaska.
Our analysts logged their 1,000,000th page of zoning text, with analysis surpassing 1 billion acres of land! Thanks for the boost, Alaska.
🗺️ We expanded our Atlas in a huge way.
This year, we’ve integrated zoning analysis for 9,000 jurisdictions—home to over half the US population! In 2025, we completed 9 states, along with a dozen major metro areas.
See our state-specific pages to see real-time progress: www.zoningatlas.org/states
This year, we’ve integrated zoning analysis for 9,000 jurisdictions—home to over half the US population! In 2025, we completed 9 states, along with a dozen major metro areas.
See our state-specific pages to see real-time progress: www.zoningatlas.org/states
STATE ATLAS RESOURCES — National Zoning Atlas
www.zoningatlas.org
December 19, 2025 at 5:59 PM
🗺️ We expanded our Atlas in a huge way.
This year, we’ve integrated zoning analysis for 9,000 jurisdictions—home to over half the US population! In 2025, we completed 9 states, along with a dozen major metro areas.
See our state-specific pages to see real-time progress: www.zoningatlas.org/states
This year, we’ve integrated zoning analysis for 9,000 jurisdictions—home to over half the US population! In 2025, we completed 9 states, along with a dozen major metro areas.
See our state-specific pages to see real-time progress: www.zoningatlas.org/states
That's a wrap on 2025! Here's a roundup of our highlights & milestones. 🧵
December 19, 2025 at 5:59 PM
That's a wrap on 2025! Here's a roundup of our highlights & milestones. 🧵
Explore the complete Utah Zoning Atlas, now live on the NZA!
Join us for our upcoming webinar where we'll share new findings on major trends in Utah's zoning, why it matters for future development, & how to get the most out of NZA data tools.
Register: us06web.zoom.us/webinar/regi...
Join us for our upcoming webinar where we'll share new findings on major trends in Utah's zoning, why it matters for future development, & how to get the most out of NZA data tools.
Register: us06web.zoom.us/webinar/regi...
December 12, 2025 at 5:45 PM
Explore the complete Utah Zoning Atlas, now live on the NZA!
Join us for our upcoming webinar where we'll share new findings on major trends in Utah's zoning, why it matters for future development, & how to get the most out of NZA data tools.
Register: us06web.zoom.us/webinar/regi...
Join us for our upcoming webinar where we'll share new findings on major trends in Utah's zoning, why it matters for future development, & how to get the most out of NZA data tools.
Register: us06web.zoom.us/webinar/regi...
We're coming to you, Atlanta! In person!
Join the NZA alongside Abundant Housing Atlanta & Kronberg Urbanists + Architects for a deep dive into the region’s most comprehensive zoning dataset.
📅 Monday, December 8
📍 Auburn Avenue Research Library
🔗 RSVP:
actionnetwork.org/events/mappi...
Join the NZA alongside Abundant Housing Atlanta & Kronberg Urbanists + Architects for a deep dive into the region’s most comprehensive zoning dataset.
📅 Monday, December 8
📍 Auburn Avenue Research Library
🔗 RSVP:
actionnetwork.org/events/mappi...
Mapping the Future: Atlanta’s Zoning Truths Uncovered
Join Abundant Housing Atlanta and the Zoning Atlas team for an in-person deep dive into the region’s most comprehensive zoning dataset. We’ll explore what the new Zoning Atlas reveals about the Atlant...
actionnetwork.org
December 5, 2025 at 12:57 PM
We're coming to you, Atlanta! In person!
Join the NZA alongside Abundant Housing Atlanta & Kronberg Urbanists + Architects for a deep dive into the region’s most comprehensive zoning dataset.
📅 Monday, December 8
📍 Auburn Avenue Research Library
🔗 RSVP:
actionnetwork.org/events/mappi...
Join the NZA alongside Abundant Housing Atlanta & Kronberg Urbanists + Architects for a deep dive into the region’s most comprehensive zoning dataset.
📅 Monday, December 8
📍 Auburn Avenue Research Library
🔗 RSVP:
actionnetwork.org/events/mappi...
Next Tuesday, join us & our partners at Housing North for a special webinar spotlighting Northwest Michigan!
We'll walk through zoning trends across 7 Northwest Michigan Counties & demonstrate how advocates can get the most out of NZA interactive tools.
Register:
us06web.zoom.us/webinar/regi...
We'll walk through zoning trends across 7 Northwest Michigan Counties & demonstrate how advocates can get the most out of NZA interactive tools.
Register:
us06web.zoom.us/webinar/regi...
December 3, 2025 at 1:02 PM
Next Tuesday, join us & our partners at Housing North for a special webinar spotlighting Northwest Michigan!
We'll walk through zoning trends across 7 Northwest Michigan Counties & demonstrate how advocates can get the most out of NZA interactive tools.
Register:
us06web.zoom.us/webinar/regi...
We'll walk through zoning trends across 7 Northwest Michigan Counties & demonstrate how advocates can get the most out of NZA interactive tools.
Register:
us06web.zoom.us/webinar/regi...
TODAY! Join us to learn about zoning in the tri-county region around Portland, Maine—an area home to 550,000 residents across 67 jurisdictions. We'll walk through regional findings & discuss how advocates can leverage NZA tools to supercharge reforms.
Register: us06web.zoom.us/webinar/regi...
Register: us06web.zoom.us/webinar/regi...
December 1, 2025 at 3:21 PM
TODAY! Join us to learn about zoning in the tri-county region around Portland, Maine—an area home to 550,000 residents across 67 jurisdictions. We'll walk through regional findings & discuss how advocates can leverage NZA tools to supercharge reforms.
Register: us06web.zoom.us/webinar/regi...
Register: us06web.zoom.us/webinar/regi...
The results from our slice calculations enable us to accurately measure how much land in a given region prohibits multi-family housing, requires large minimum lot sizes, includes parking requirements, permits ADUs, & more!
Learn more at www.zoningatlas.org/snapshots-me...
Learn more at www.zoningatlas.org/snapshots-me...
How the National Zoning Atlas Makes Zoning Snapshots (Methodology) — National Zoning Atlas
The National Zoning Atlas has developed Zoning Snapshots which summarize zoning conditions in any place published to the NZA. Type in the place name to find a jurisdiction, county, or metro/micropolit...
www.zoningatlas.org
November 14, 2025 at 2:58 PM
The results from our slice calculations enable us to accurately measure how much land in a given region prohibits multi-family housing, requires large minimum lot sizes, includes parking requirements, permits ADUs, & more!
Learn more at www.zoningatlas.org/snapshots-me...
Learn more at www.zoningatlas.org/snapshots-me...
That single lot on Van Ness Avenue has one base district (RC-4) & FIVE overlays. In San Francisco alone, different combinations of base & overlay districts result in 951 individual slices!
New York City has the most of any city in our database at 3,262. 🤯
New York City has the most of any city in our database at 3,262. 🤯
November 14, 2025 at 2:58 PM
That single lot on Van Ness Avenue has one base district (RC-4) & FIVE overlays. In San Francisco alone, different combinations of base & overlay districts result in 951 individual slices!
New York City has the most of any city in our database at 3,262. 🤯
New York City has the most of any city in our database at 3,262. 🤯
To give you an idea of the prevalence of slices, take a look at this image from San Francisco, where each color represents a different slice. In the next image, you can see an example of all the districts that were flattened in one highlighted slice.
November 14, 2025 at 2:58 PM
To give you an idea of the prevalence of slices, take a look at this image from San Francisco, where each color represents a different slice. In the next image, you can see an example of all the districts that were flattened in one highlighted slice.
The output appears like a stained-glass mosaic, where each component, or “slice,” represents a distinct set of zoning rules that apply to the underlying land.
November 14, 2025 at 2:58 PM
The output appears like a stained-glass mosaic, where each component, or “slice,” represents a distinct set of zoning rules that apply to the underlying land.
To generate our slices, we developed a method with our partners at GreenInfo Network to override the regulations in the base districts with those from the overlay districts by flattening all possible layers.
November 14, 2025 at 2:58 PM
To generate our slices, we developed a method with our partners at GreenInfo Network to override the regulations in the base districts with those from the overlay districts by flattening all possible layers.
Slices are the unique geometric combinations of base & overlay zoning districts that serve as the basic building block for all NZA statistics.
November 14, 2025 at 2:58 PM
Slices are the unique geometric combinations of base & overlay zoning districts that serve as the basic building block for all NZA statistics.
Failing to carefully account for this multi-layered regulatory landscape risks producing analytical errors and misrepresenting zoning conditions. “Slices” are the NZA’s solution to this problem.
November 14, 2025 at 2:58 PM
Failing to carefully account for this multi-layered regulatory landscape risks producing analytical errors and misrepresenting zoning conditions. “Slices” are the NZA’s solution to this problem.