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U.S. Solar Siting Regulation and Zoning Ordinances (2025)
L o a d i n g
Organization
National Renewable Energy Laboratory (NREL) - view all
Update frequencyunknown
Last updated4 days ago
Overview

A machine readable collection of documented solar siting ordinances at the state and local (e.g., county, township) level throughout the United States. The data were compiled using the Infrastructure Continuous Ordinance Mapping for Planning and Siting Systems (INFRA-COMPASS) tool, which leverages Large Language Models (LLMs) to automate the collection of local codes and ordinances applicable to energy infrastructure. URLs for the ordinance source documents are included in the Solar Ordinances spreadsheet. The GeoPackage file included below contains the jurisdiction shapes for each ordinance. Note that the GeoPackage file is formatted for ingestion by NLR's reVX setbacks tool and therefore does not contain any of the state-level regulations. **NOTE**: This data was collected with the help of generative AI. The Large Language Models used for this effort make mistakes. Always validate the data for critical use cases. This data is an update to a previously developed database of wind ordinances found in OEDI Submission 5734: see the "U.S. Solar Siting Regulation and Zoning Ordinances 2022" link below. INFRA-COMPASS version used for collection: v0.11.3 LLMs used for collection: GPT-4.1, GPT-4.1 mini, GPT-4.1 nano

AICOMPASSINFRA-COMPASSLLMSiting LabSitingLabanalysiscitationsenergyenergy analysisexclusionincentivesland-based solarlawlegallocalmachine readableordinancespolicypowerpvregulatory constraintregulatory constraintssitingsolarsolar pv
Additional Information
KeyValue
Dcat Issued2025-12-30T07:00:00Z
Dcat Modified2026-02-03T13:45:06Z
Dcat Publisher NameNational Laboratory of the Rockies (NLR)
Guidhttps://data.openei.org/submissions/8602
Harvest Object Idbafd58e3-aa8f-4ea6-94dd-716b35ba2ae3
Harvest Source Id4eb7107f-a2b1-40e3-b36a-8161aa98a56e
Harvest Source TitleOpenEI Data Portal
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Trust Signals
Trust Framework(s)None
Assuranceunknown
Data Sensitivity Classunknown
Licenceunknown
Files
  • INFRA-COMPASS GitHub Repository

  • U.S. Counties FIPS Layer

  • U.S. Solar Siting Regulation and Zoning Ordinances 2022

  • Solar Ordinances 2025.xlsx

  • Solar Ordinances reVX 2025-12-30.gpkg