| Analyze Boston, Property Assessment FY2026 boston_assessing | City of Boston Assessing Department | US-MA | 6,635,193 | 352,662 | Jul 1, 2025 | annual, fiscal year |
| MassGIS L3 Standardized Assessors' Parcels massgis_l3 | MassGIS, Bureau of Geographic Information, EOTSS | US-MA | 3,587,799 | 225,637 | Dec 19, 2026 | aggregate twice yearly, towns roll monthly |
| Analyze Boston, Approved Building Permits boston_permits | City of Boston Inspectional Services | US-MA | 3,279,002 | 201,410 | Sep 2, 2026 | daily |
| Tax System Property Sales (CAMA) dc_cama_property_sales | District of Columbia Office of the Chief Financial Officer, Office of Tax and Revenue, Real Property Tax Administration | US-DC | 2,480,270 | 422,801 | Sep 11, 2026 | DAILY |
| Trade Names for Businesses in Colorado co_sos_trade_names | Colorado Department of State (Secretary of State) | US-CO | 2,233,396 | 287,045 | Sep 13, 2026 | DAILY |
| Tax Lien Sale Lists ny_nyc_tax_lien_sale_lists | City of New York, Department of Finance | US-NY | 2,103,528 | 264,142 | Sep 12, 2026 | IRREGULAR |
| BPDA FY26 Parcels with Planning and Zoning Data bpda_zoning_compliance | Boston Planning Department | US-MA | 2,077,567 | 98,423 | Aug 29, 2026 | unstated, observed roughly weekly |
| CaseInspections (Regulatory Services inspections cases) mn_minneapolis_case_inspections | City of Minneapolis, Regulatory Services | US-MN | 1,852,233 | 373,280 | Sep 12, 2026 | UNKNOWN |
| Cincinnati Building Permits oh_cincinnati_building_permits | City of Cincinnati | US-OH | 1,753,701 | 180,019 | Sep 13, 2026 | DAILY |
| Registration Contacts ny_nyc_hpd_registration_contacts | City of New York, Department of Housing Preservation and Development | US-NY | 1,711,070 | 810,494 | Sep 12, 2026 | MONTHLY |
| Tax Exempt Property (RPTA) dc_tax_exempt_property_rpta | District of Columbia Office of the Chief Financial Officer, Real Property Tax Administration | US-DC | 1,631,471 | 104,205 | Sep 11, 2026 | UNKNOWN |
| Montgomery County Residential Permit (dataMontgomery m88u-pqki) md_montgomery_dps_residential_permits | Montgomery County, Maryland, Department of Permitting Services | US-MD | 1,611,745 | 186,524 | Sep 13, 2026 | DAILY |
| Cook County Clerk - Tax codes, agencies, and rates il_cook_clerk_tax_codes_agencies_rates | Cook County Clerk | US-IL | 1,546,652 | 386,663 | Sep 13, 2026 | ANNUAL |
| Multifamily Properties, Assisted (ArcGIS FeatureServer) fed_multifamily_assisted_gis | U.S. Department of Housing and Urban Development, Office of the Chief Information Officer eGIS | US | 1,540,246 | 23,783 | Sep 11, 2026 | IN_PLACE_OVERWRITE |
| Treasurer - Annual Tax Sale il_cook_treasurer_annual_tax_sale | Cook County Treasurer | US-IL | 1,470,932 | 200,915 | Sep 12, 2026 | ANNUAL |
| Active Real Estate Salespersons and Brokers ny_nys_active_re_salespersons_brokers | New York State Department of State, Division of Licensing Services | US-NY | 1,467,492 | 147,401 | Sep 12, 2026 | DAILY |
| Certificate of Occupancy dc_certificate_of_occupancy | District of Columbia Department of Buildings | US-DC | 1,381,658 | 81,771 | Sep 11, 2026 | DAILY |
| Industrial Development Agencies' Project Data ny_nys_ida_project_data | New York State Office of the State Comptroller, Authorities Budget Office reporting | US-NY | 1,370,083 | 34,348 | Sep 12, 2026 | ANNUAL |
| Allegheny County Finished Property Assessment Appeals pa_allegheny_assessment_appeals | Allegheny County | US-PA | 1,353,972 | 96,713 | Sep 13, 2026 | ANNUAL |
| HUD LIHTC Database (property and building files) hud_lihtc | US Department of Housing and Urban Development, HUD USER | US | 1,280,157 | 55,345 | Jan 1, 2027 | annual, each spring |
| Multiple Dwelling Registrations ny_nyc_hpd_multiple_dwelling_registrations | City of New York, Department of Housing Preservation and Development | US-NY | 1,219,973 | 203,887 | Sep 13, 2026 | MONTHLY |
| L&I Contractor License Data, General wa_lni_contractor_license_general | Washington State Department of Labor and Industries | US-WA | 1,190,146 | 161,190 | Sep 13, 2026 | DAILY |
| HUD Insured Multifamily Properties and Multifamily Properties Assisted hud_multifamily_arcgis | US Department of Housing and Urban Development | US | 1,174,750 | 41,365 | Aug 28, 2026 | in place, continuously |
| Inspections & Certificates oh_cincinnati_inspections_certificates | City of Cincinnati | US-OH | 1,166,983 | 83,657 | Sep 12, 2026 | DAILY |
| 311 Service Requests - Vacant and Abandoned Buildings Reported - Historical il_chicago_311_vacant_abandoned_historical | City of Chicago, Department of Buildings | US-IL | 1,162,642 | 65,119 | Sep 12, 2026 | ONE_TIME |
| Code Complaints and Violations wa_seattle_code_complaints_violations | City of Seattle, Department of Construction and Inspections | US-WA | 1,134,936 | 248,870 | Sep 13, 2026 | DAILY |
| Building Permits wa_seattle_building_permits | City of Seattle, Department of Construction and Inspections | US-WA | 1,129,865 | 192,100 | Sep 13, 2026 | DAILY |
| SEC EDGAR ABS-EE, CMBS asset level disclosure sec_abs_ee | US Securities and Exchange Commission | US | 1,032,076 | 30,967 | Aug 11, 2026 | monthly, filed with the 10-D, about a 16 day lag |
| Real Property Tax Rates Levy Data By Municipality: Beginning 2004 ny_nys_tax_rates_and_levy | New York State Department of Taxation and Finance, Office of Real Property Tax Services | US-NY | 1,029,237 | 64,330 | Sep 12, 2026 | ANNUAL |
| Pennsylvania Vacant Addresses pa_pennsylvania_vacant_addresses | Western Pennsylvania Regional Data Center | US-PA | 1,019,720 | 13,780 | Sep 13, 2026 | QUARTERLY |