New York City NY
The deepest public record in the country, on one open-data portal refreshed nightly: DOB permits and violations, HPD violations and registrations that name the managing agent, FISP facade filings, certificates of occupancy and ACRIS deeds. Every building can be matched to the company behind it.
Long Island NY
Nassau and Suffolk permit through dozens of towns and villages, each on its own system. Coverage is assembled town by town; the county clerk records add ownership.
Westchester and the Hudson Valley NY
Municipal permitting, county deed records and a large managed multifamily stock. Thinner than the city, but the registration layer in the larger municipalities names who is responsible.
New Jersey NJ
Hundreds of municipalities, each issuing its own construction permits, over a state layer of multifamily registrations, structural integrity inspections and deed records. Read town by town.
Philadelphia PA
Licenses and Inspections publishes permits, violations, complaints and rental licences on an open-data portal with daily refresh, one of the best outside New York. Rental licences name the responsible party.
Pittsburgh PA
City permits and code cases are published, and the rental registration programme names the owner and local agent. Allegheny County adds deeds and assessments.
Boston MA
Inspectional Services publishes permits and violations, and the rental registration names the owner and manager of every rented unit. Suffolk County deeds add ownership.
Washington, DC DC
Permits, business licences with a registered agent for every rental property, code violations and recorded deeds, all on the district portal. The licence layer makes owner matching unusually clean.
Baltimore MD
Permits, code enforcement and the rental licensing programme are published; the licence names the owner and manager. Land records add transfers.
Charlotte NC
Mecklenburg County publishes permits and inspections through the county system. North Carolina bars rental registration, so matching leans on deeds and business filings.
Raleigh and the Triangle NC
City and county permits are published with inspections; no rental registry by state law. Ownership comes from county deeds and business registrations.
Atlanta GA
City permits through the Accela portal and Fulton County deeds. No rental registry, so the account layer is built from ownership and business records.
Miami FL
Miami-Dade permits and code cases on the county portal, plus the state licence file for community association managers, which names the management firm for condo and HOA stock.
Orlando FL
City and Orange County permits, code enforcement, and the state licence file for community association management firms. Hotel and hospitality openings show in state licensing.
Tampa FL
City and Hillsborough County permits and code enforcement, with the state licence file for association managers and a large multifamily and hospitality pipeline.
Jacksonville FL
Consolidated city-county permitting on one system, with code enforcement and Duval County deeds. Fewer layers than South Florida, read from one place.
Nashville TN
Metro publishes permits and code violations on an open-data portal, refreshed daily, with Davidson County deeds for ownership. A fast-growing hospitality and multifamily record.
Memphis TN
City permits and code enforcement through the city system, Shelby County deeds and assessments for ownership. Thinner registration layer; matching leans on ownership.
Louisville KY
Metro publishes permits and code cases as open data, with the county clerk for deeds. Compact, readable, refreshed regularly.
Cincinnati OH
City permits and code enforcement are published as open data, with Hamilton County recorder for deeds. The rental registration programme names the responsible party.
Columbus OH
City permits and code cases on the open-data portal, refreshed frequently, with Franklin County deeds. One of the larger midwestern permit feeds.
Cleveland OH
City permits and violations, a rental registration that names owner and local agent, and Cuyahoga County deeds. The registration layer is the useful join.
Detroit MI
Permits, blight violations and the rental registration and certificate-of-compliance programme are published. Wayne County deeds add transfers.
Chicago IL
A strong city portal for permits, violations, 311 and business licences, with the Cook County recorder for deeds. The registration layer is thinner than New York, so matching leans on licences and ownership.
Milwaukee WI
City permits and code cases, a landlord registration that names the responsible party, and county deeds. Compact and well published.
Minneapolis and St. Paul MN
Both cities publish permits and code cases, and rental licences name the owner and manager on every rented building. Hennepin and Ramsey County deeds add ownership.
Kansas City MO
City permits and code enforcement on the open-data portal, a healthy-homes rental inspection programme, and Jackson County records. Read from one portal.
St. Louis MO
City permits, code cases and occupancy permits are published, with the city recorder of deeds. Occupancy permits mark buildings coming into use.
Houston TX
City permits through the permitting portal, code enforcement, and Harris County clerk records for deeds. No zoning, so permits carry more of the signal.
Dallas and Fort Worth TX
Both cities publish permits and code cases; Dallas ran a rental registration and Fort Worth publishes through its own system. County clerks add deeds across the metroplex.
San Antonio TX
City permits and code cases on the open-data portal, with Bexar County deeds. Readable and refreshed daily.
Austin TX
One of the best-published permit records in the country: permits, inspections and code cases on the open-data portal with daily refresh, and Travis County deeds.
Phoenix AZ
City permits and code cases, and the Maricopa County rental registration that names the owner and agent for every rented property in the county. A strong account layer.
Denver CO
City permits, code cases and the residential rental licensing programme that names the owner and manager. Denver County records add deeds.
Las Vegas NV
City and Clark County permits, and the state real estate division's licence files that name community association and property managers. Hospitality openings show in licensing.
Salt Lake City UT
City permits and code enforcement through the city portal, with county recorder deeds. Business licensing marks new commercial occupiers.
Los Angeles CA
Building and Safety publishes permits, code enforcement and inspections on the open-data portal, and the rent registry names owners for rent-stabilised stock. County assessor and recorder add ownership.
San Diego CA
City permits on the open-data portal, code enforcement, and county recorder deeds. Business tax certificates mark new operators.
San Francisco CA
DataSF publishes permits, complaints and violations with daily refresh, and the rent board registry names owners of covered units. Recorder deeds add transfers.
San Jose and Silicon Valley CA
City permits and code cases on the open-data portal, with Santa Clara County records. A deep commercial and data-centre permit record.
Sacramento CA
City and county permits, the rental housing inspection programme, and county recorder deeds. The inspection programme names the responsible party.
Portland OR
City permits and inspections through PortlandMaps, code cases, and the rental registration that lists every rented unit and its owner. Multnomah County deeds add transfers.
Seattle WA
SDCI permits and code violations are published, and the rental registration names the responsible contact for every registered property. King County recorder adds deeds.