HousingElementSite_poly_scag

The housing element of the general plan must include an inventory of land suitable and available for residential development to meet the locality’s regional housing need by income level. Government Code (GC) Section 65583(a)(3) requires local governments to prepare an inventory of land suitable for residential development – including vacant sites and sites with potential for redevelopment, an analysis of the relationship of zoning and public facilities and services to these sites, and an analysis of the relationship of the sites identified in the land inventory to the jurisdiction’s duty to affirmatively further fair housing – as part of the housing element. The purpose of the inventory is to identify sites that can be developed for housing within the planning period (GC Section 65583.2).The purpose of the housing element’s site inventory is to identify and analyze specific land (sites) that is available and suitable for residential development in order to determine the jurisdiction’s capacity to accommodate residential development and reconcile that capacity with the jurisdiction’s Regional Housing Need Allocation (RHNA). The site inventory enables the jurisdiction to determine whether there are sufficient adequate sites to accommodate the RHNA by income category. A site inventory and analysis will determine whether program actions must be adopted to “make sites available” with appropriate zoning, development standards, and infrastructure capacity to accommodate the new development need.[1]Two types of sites are included in local housing elements. First, it includes sites that are suitable for residential development if zoned appropriately and available for residential use during the planning period. These sites make up the housing element sites inventory. Second, when the inventory demonstrates that there are insufficient sites to accommodate the RHNA for each income category, local governments must identify sites for rezoning and include them in a housing element program to make available additional sites to accommodate those housing needs early within the planning period.This data contains sites sourced from the Housing Element Site Inventory Form created by HCD: Table A, Housing Element Sites Inventory. SCAG obtained the housing unit capacity by income level and total capacity for housing element sites from Table A.To develop the dataset, SCAG downloaded available information from the California Department of General Services via a map viewer created pursuant to Senate Bill 6 (Beall, 2019) and Assembly Bill 1255 (Rivas, 2019) in October 2025. The downloaded dataset included housing element sites (Table A) for 147 jurisdictions in the SCAG region. Through research, SCAG staff were able to obtain sites inventory information for an additional 21 jurisdictions. The final dataset includes housing element sites for 168 local jurisdictions. Once the information was compiled, staff formatted Assessor Parcel Numbers (APN) from the source data to match SCAG’s 2024 parcel data. Some sites and their capacity could not be mapped due to unmatched or incomplete APNs. The unmatched APNs may reflect parcels for which official APNs were not available at the time the sites inventory was prepared. Housing capacity was aggregated to the parcel level separately for housing element sites and candidate sites for rezoning. Therefore, sites with the same APN were collapsed into a single record within each site type. During the data cleaning and quality control process, staff discovered discrepancies between the DGS data and currently available local data. The discrepancies might reflect the point-in-time nature of the DGS data at the time of reporting, as well as potential errors in data processing. An exercise was undertaken to address these issues; however, users should consult local jurisdictions for the latest site-specific information. Note: This dataset is intended for planning purposes only, and SCAG shall incur no responsibility or liability as to the completeness, currentness, or accuracy of this information. SCAG assumes no responsibility arising from use of this information by individuals, businesses, or other public entities. The information is provided with no warranty of any kind, expressed or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Users should consult with each local jurisdiction directly to obtain the official residential development information.[1] California Department of Housing and Community Development. (2020). Housing Element Sites Inventory Guidebook. Retrieved from https://www.hcd.ca.gov/community-development/housing-element/docs/Sites_inventory_memo_final06102020.pdfData Description/Field DefinitionField NameData TypeLengthDescription SourceField DescriptionPID24Text13SCAG2024 SCAG's unique parcel identifierAPN24Text10SCAG2024 Assessor Parcel Number as collected from the County Assessor OfficeCOUNTYText14SCAGCounty nameJurisdictionText21HCDName of jurisdictionAssessor_Parcel_NumberText15HCDOriginal APN entered by the jurisdiction that was used to match with APN24Low_Income_HE_CapacityDoubleHCDEstimated net number of lower income units each parcel can accommodate, sourced from Housing Element Sites Inventory Form Table A, Column P. Moderate_Income_HE_CapacityDoubleHCDEstimated net number of moderate income units each parcel can accommodate, sourced from Housing Element Sites Inventory Form Table A, Column Q. Above-Moderate_Income_HE_CapacityDoubleHCDEstimated net number of above-moderate income units each parcel can accommodate, sourced from Housing Element Sites Inventory Form Table A, Column R. Total_HE_CapacityDoubleHCDEstimated total housing units each parcel can accommodate, sourced from Housing Element Sites Inventory Form Table A, Column S.总体规划中的住房要素必须包含按收入等级划分的、适合且可用于住宅开发的土地盘点，以满足当地区域住房需求。《政府法典》（Government Code, GC）第65583(a)(3)条要求地方政府将适合住宅开发的土地盘点作为住房要素的组成部分，此类土地包括空置地块及具备再开发潜力的地块；需分析土地区划与公共设施、服务同这些地块的关联，同时分析土地盘点中确定的地块与辖区落实积极推进公平住房职责的关联。本次盘点的目的是识别规划期内可用于住宅开发的地块（《政府法典》第65583.2条）。 住房要素地块盘点的目的是识别并分析适合且可用于住宅开发的特定土地（地块），以确定辖区容纳住宅开发的能力，并将该能力与辖区的区域住房需求分配（Regional Housing Need Allocation, RHNA）相匹配。地块盘点可帮助辖区判断是否存在足够的合格地块，以按收入类别满足区域住房需求分配的要求。通过地块盘点与分析，可确定是否需采取规划行动，通过适配的土地区划、开发标准及基础设施承载能力，"释放地块供开发"以满足新增开发需求。[1] 地方住房要素包含两类地块。第一类为经适配的土地区划后、可在规划期内用于住宅开发的适合地块，此类地块构成住房要素地块盘点清单。第二类为当地政府在盘点发现现有地块不足以按收入类别满足区域住房需求分配要求时，需确定进行区划调整的地块，并将其纳入住房要素规划项目，以在规划期内尽早释放额外地块以满足相关住房需求。 本数据集的地块来源于加州住房与社区发展部（Housing and Community Development, HCD）编制的《住房要素地块盘点表》中的表A：住房要素地块盘点清单。南加州政府协会（Southern California Association of Governments, SCAG）从表A中提取了按收入等级划分的住宅单元容量及住房要素地块总容量数据。 为构建本数据集，SCAG于2025年10月通过依据《州参议院法案6号》（Beall, 2019）及《州众议院法案1255号》（Rivas, 2019）开发的地图查看器，从加州总务部（California Department of General Services, DGS）下载了可用信息。下载得到的数据集包含SCAG辖区内147个管辖区的住房要素地块数据（表A）。经调研，SCAG工作人员额外获取了21个管辖区的地块盘点信息。最终数据集涵盖168个地方管辖区的住房要素地块数据。信息汇总完成后，工作人员对源数据中的评估员地块编号（Assessor Parcel Number, APN）进行格式标准化，以匹配SCAG 2024年地块数据。由于APN不匹配或不完整，部分地块及其容量无法完成映射。未匹配的APN可能源于地块盘点编制时未获取到官方APN的地块。住宅容量被分别针对住房要素地块及拟区划调整候选地块聚合至地块层级。因此，同一APN对应的地块将被合并为每种地块类型下的单条记录。在数据清洗与质量控制过程中，工作人员发现DGS数据与当前可用的地方数据存在差异。此类差异可能源于DGS数据的时点统计特性，以及数据处理过程中潜在的错误。虽已开展相关工作以解决此类问题，但用户仍应直接咨询地方管辖区以获取最新的地块专属信息。 注意：本数据集仅用于规划用途，SCAG不对本信息的完整性、时效性或准确性承担任何责任。SCAG不对个人、企业或其他公共实体使用本信息所引发的任何问题承担责任。本信息按现状提供，不附带任何明示或默示的担保，包括但不限于适销性及特定用途适用性的默示担保。用户应直接咨询各地方管辖区以获取官方住宅开发信息。 [1] 加州住房与社区发展部. (2020). 《住房要素地块盘点指南》. 检索自：https://www.hcd.ca.gov/community-development/housing-element/docs/Sites_inventory_memo_final06102020.pdf 数据描述/字段定义 字段名 数据类型 长度 描述来源 字段说明 PID24 文本型（Text） 13 SCAG 2024 SCAG 2024年专属地块标识符 APN24 文本型（Text） 10 SCAG 2024 从县评估员办公室获取的2024年评估员地块编号 COUNTY 文本型（Text） 14 SCAG 县名称 Jurisdiction 文本型（Text） 21 HCD 管辖区名称 Assessor_Parcel_Number 文本型（Text） 15 HCD 管辖区录入的原始评估员地块编号，用于与APN24匹配 Low_Income_HE_Capacity 双精度浮点型（Double） - HCD 各地块可容纳的低收入住宅单元净数量，来源于《住房要素地块盘点表》表A的P列 Moderate_Income_HE_Capacity 双精度浮点型（Double） - HCD 各地块可容纳的中等收入住宅单元净数量，来源于《住房要素地块盘点表》表A的Q列 Above-Moderate_Income_HE_Capacity 双精度浮点型（Double） - HCD 各地块可容纳的中等以上收入住宅单元净数量，来源于《住房要素地块盘点表》表A的R列 Total_HE_Capacity 双精度浮点型（Double） - HCD 各地块可容纳的住宅单元总数量，来源于《住房要素地块盘点表》表A的S列