SCAG Housing Element Parcel (HELPR) Tool, version 2

[Pages:10]SCAG Housing Element Parcel (HELPR) Tool, version 2.0

Released June 2021

About this Tool

HELPR is a web-mapping tool developed by SCAG to help local jurisdictions and stakeholders understand local land use, site opportunities, and environmental sensitivities for aligning housing planning with the state Department of Housing and Community Development's (HCD) 6th cycle housing element requirements. The tool is principally based on updated, curated versions of parcel-level land use data and other datasets which have been available through SCAG's open data portal. It also allows for downloads of tabular and spatial data for external use as well as an embedded housing statistics dashboard. Additionally, the tool provides the opportunity to review certain regional policy objectives in SCAG's 2020 Regional Transportation Plan/Sustainable Communities Strategy (Connect SoCal) which may be informed during the housing element update.

Please note that while this tool was developed with input from HCD, it does not represent SCAG's or any local jurisdiction's opinion of development capacity, constraints, or potential future housing development. HCD is ultimately responsible for determining a site's suitability for inclusion in housing element updates.

This tool was developed in collaboration with SCAG's Regional Data Platform (RDP), an ongoing "system of systems" effort to promote regional data sharing and collaboration and to provide long-range planning tools to all SCAG local jurisdictions (see for RDP details). Certain data elements were informed by SCAG's Southern California Regional Greenprint project (underway in partnership with The Nature Conservancy) and the Southern California Climate Adaptation Framework. Please contact the Local Information Services Team (LIST) at list@scag. for more information such as how to schedule one-on-one technical assistance and how to provide updated data.

Using HELPR

The first step is to select the local jurisdiction you wish to review. The tool will show parcel-level land use data for the region or selected jurisdiction. The default colors (symbology) will show 2019 existing land use, shown in the legend which can be expanded using the button at the top-right.

The following parcel-level characteristics are available in the underlying data. Many, but not all, can be directly viewed by clicking on an individual parcel. All are accessible for download by clicking the button at the bottom of the left-side pane in tabular (.csv) or shapefile (.shp) formats. Note that all filters must be OFF in order to download parcel data for an entire jurisdiction. Users will have access to a number of filters to identify parcels that meet criteria for vacancy, infill potential, public ownership, environmental sensitivities, opportunity areas, environmental justice areas, accessibility to destinations, potential accessory dwelling unit sites, and alignment with Connect SoCal's priority growth and constrained areas. Additional information on filtering functionality is described further in this document.

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Field Name PID19 APN19 COUNTY COUNTY_ID CITY CITY_ID MULTIPART

STACK

ACRES GEOID20 SLOPE

APN_DUP

IL_RATIO LU19 LU19_SRC SCAGUID16 APN CITY_GP_CO SCAG_GP_CO SP_INDEX

CITY_SP_CO SCAG_SP_CO CITY_ZN_CO SCAG_ZN_CO LU16 YEAR

PUB_OWN

PUB_NAME PUB_TYPE BF_SQFT BSF_NAME BSF_TYPE

Data Type

Text

Text

Text

Double

Text

Double

Short Integer Long Integer Double

Text

Short Integer Long Integer Double

Text

Text

Text

Text

Text

Text

Short Integer Text

Text

Text

Text

Text

Long Integer Short Integer Text

Text

Double

Text

Text

Field Description 2019 SCAG's parcel unique ID 2019 Assessor's parcel number County name (based on 2016 county boundary) County FIPS code (based on 2016 county boundary) City name (based on 2016 city boundary) City FIPS code (based on 2016 city boundary) Multipart feature (the number of multiple polygons; '1' = singlepart feature)

Duplicate geometry (the number of duplicate polygons; '0' = no duplicate polygons)

Parcel area (in acreage) 2020 Census Block Group GEOID Slope information1

Duplicate APN (the number of multiple tax roll property records; '0' = no duplicate APN)

Ratio of improvement assessed value to land assessed value 2019 existing land use Source of 2019 existing land use2 2016 SCAG's parcel unique ID 2016 Assessor's parcel number 2016 Jurisdiction's general plan land use designation 2016 SCAG general plan land use code Specific plan index ('0' = outside specific plan area; '1' = inside specific plan area)

2016 Jurisdiction's specific plan land use designation 2016 SCAG specific plan land use code 2016 Jurisdiction's zoning code 2016 SCAG zoning code 2016 existing land use Dataset year

Public-owned land index ('1' = owned by public agency)

Name of public agency Type of public agency3 Building footprint area (in square feet)4 Name of brownfield/superfund site5 Type of brownfield/superfund site5

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FIRE SEARISE36 SEARISE72 FLOOD

EQUAKE LIQUAFA LANDSLIDE CPAD RIPARIAN WILDLIFE

CNDDB

HCPRA

WETLAND UAZ UNBUILT_SF GRCRY_1MI HEALTH_1MI OPENSP_1MI TCAC_2021 HQTA45 JOB_CTR NMA

Short Integer Short Integer Short Integer Short Integer

Short Integer Short Integer Short Integer Short Integer Short Integer Short Integer

Short Integer

Short Integer

Short Integer Short Integer Double

Short Integer Short Integer Short Integer Text

Short Integer Short Integer Short Integer

Parcel intersects CalFire Very High Hazard Local Responsibility Areas or State Responsibility Areas (November 2020 version) (CalFIRE) Parcel intersects with USGS Coastal Storm Modeling System (CoSMos) 1 Meter Sea Level Rise inundation areas for Southern California (v3.0, Phase 2; 2018) Parcel intersects with USGS Coastal Storm Modeling System (CoSMos) 2 Meter Sea Level Rise inundation areas for Southern California (v3.0, Phase 2; 2018) Parcel intersects with a FEMA 100 Year Flood Plain data from the Digital Flood Insurance Rate Map (DFIRM), obtained from Federal Emergency Management Agency (FEMA) in August 10, 2017 Parcel intersects with an Alquist-Priolo Earthquake Fault Zone (California Geological Survey; 2018) Parcel intersects with a Liquefaction Susceptibility Zone (California Geological Survey; 2016) Parcel intersects with a Landslide Hazard Zone (California Geological Survey; 2016)

Parcel intersects with a protected area from the California Protected Areas Database (CPAD) ? (accessed April 2021) Parcel centroid falls within Active River Areas (2010) or parcel intersects with a Wetland Area in the National Wetland Inventory (Version 2) Parcel intersects with wildlife habitat (US Fish & Wildlife Service Critical Habitat, Southern California Missing Linkages, Natural Lands & Habitat Corridors from Connect SoCal, CEHC Essential Connectivity Areas, Critical Coastal Habitats) The California Natural Diversity Database (CNDDB) includes the status and locations of rare plants and animals in California. Parcels that overlap locations of rare plants and animals in California from the California Natural Diversity Database (CNDDB) have a greater likelihood of encountering special status plants and animals on the property, potentially leading to further legal requirements to allow development (California Department of Fish and Wildlife). Data accessed in October 2020. Parcel intersects Natural Community & Habitat Conservation Plans Reserve Designs from the Western Riverside MHSCP, Coachella Valley MHSCP, and the Orange County Central Coastal NCCP/HCP, as accessed in October 2020 Parcel intersects a wetland or deepwater habitat as defined by the US Fish & Wildlife Service National Wetlands Inventory, Version 2. Parcel centroid lies within a Caltrans Adjusted Urbanized Areas

Difference between parcel area and building footprint area expressed in square feet.6

The number of grocery stores within a 1-mile drive7

The number of healthcare facilities within a 1-mile drive7

Quantity of open space (roughly corresponding to city blocks' worth) within a 1-mile drive7 The opportunity level based on the 2021 CA HCD/TCAC opportunity scores.

Field takes a value of 1 if parcel centroid lies within a 2045 High-Quality Transit Area (HQTA) Field takes a value of 1 if parcel centroid lies within a job center

Field takes a value of 1 if parcel centroid lies within a neighborhood mobility area.

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ABS_CONSTR

Short

Field takes a value of 1 if parcel centroid lies within an absolute constraint area. See

Integer

the Sustainable Communities Strategy Technical Report for details.

VAR_CONSTR

Short

Field takes a value of 1 if parcel centroid lies within a variable constraint area. See the

Integer

Sustainable Communities Strategy Technical Report for details.

EJA

Short

Field takes a value of 1 if parcel centroid lies within an Environmental Justice Area.

Integer

See the Environmental Justice Technical Report for details.

SB535

Short

Field takes a value of 1 if parcel centroid lies within an SB535 Disadvantaged

Integer

Community area. See the Environmental Justice Technical Report for details.

COC

Short

Field takes a value of 1 if parcel centroid lies within a Community of Concern See the

Integer

Environmental Justice Technical Report for details.

STATE

Short

This field is a rudimentary estimate of which parcels have adequate physical space to

Integer

accommodate a typical detached Accessory Dwelling Unit (ADU)8.

SB

Short

Index of ADU eligibility according to the setback reduction policy scenario (from 4 to 2

Integer

feet) (1 = ADU eligible parcel, Null = Not ADU eligible parcel)

SM

Short

Index of ADU eligibility according to the small ADU policy scenario (from 800 to 600

Integer

square feet ADU) (1 = ADU eligible parcel, Null = Not ADU eligible parcel)

PK

Short

Index of ADU eligibility according to parking space exemption (200 square feet) policy

Integer

scenario (1 = ADU eligible parcel, Null = Not ADU eligible parcel)

SB_SM

Short

Index of ADU eligibility according to both the setback reduction and small ADU policy

Integer

scenarios (1 = ADU eligible parcel, Null = Not ADU eligible parcel)

SB_PK

Short

Index of ADU eligibility according to both the setback reduction and parking space

Integer

exemption scenarios (1 = ADU eligible parcel, Null = Not ADU eligible parcel)

SM_PK

Short

Index of ADU eligibility according to both the small ADU policy and parking space

Integer

exemption scenarios (1 = ADU eligible parcel, Null = Not ADU eligible parcel)

SB_SM_PK

Short

Index of ADU eligibility according to the setback reduction, small ADU, and parking

Integer

space exemption scenarios (1 = ADU eligible parcel, Null = Not ADU eligible parcel)

1. Slope: '0' - 0~4 percent; '5' - 5~9 percent; '10' - 10~14 percent; '15' = 15~19 percent; '20' - 20~24 percent; '25' = 25 percent

or greater.

2. Source of 2019 existing land use: SCAG_REF- SCAG's regional geospatial datasets; ASSESSOR- Assessor's 2019 tax roll records; CPAD- California Protected Areas Database (version 2020a; accessed in September 2020); CSCD- California School Campus Database (version 2018; accessed in September 2020); FMMP- Farmland Mapping and Monitoring Program's Important Farmland GIS data (accessed in September 2020); MIRTA- U.S. Department of Defense's Military Installations, Ranges, and Training Areas GIS data (accessed in September 2020)

3. Type of public agency includes federal, state, county, city, special district, school district, college/university, military.

4. Based on 2019 building footprint data obtained from BuildingFootprintUSA (except that 2014 building footprint data was used for Imperial County). Please note that 2019 building footprint data does not cover the entire SCAG region (overlapped with 83% of parcels in the SCAG Region).

5. Includes brownfield/superfund site whose address information are matched by SCAG rooftop address locator. Brownfield data was obtained from EPA's Assessment, Cleanup and Redevelopment Exchange System (ACRES) database, Cleanups in my community (CIMC), DTSC brownfield Memorandum of Agreement (MOA). Superfund site data was obtained from EPA's Superfund Enterprise Management System (SEMS) database.

6. Parcels with a zero value for building footprint area are marked as NULL to indicate this field is not reliable.

7. These values are intended as a rudimentary indicator of accessibility developed by SCAG using 2016 InfoUSA business establishment data and 2017 California Protected Areas data. See documentation for details.

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8. A detailed study conducted by Cal Poly Pomona (CPP) and available here conducted an extensive review of state and local requirements and development trends for ADUs in the SCAG region and developed a baseline set of assumptions for estimating how many of a jurisdiction's parcels could accommodate a detached ADU. Please note that these estimates (1) do not include attached or other types of ADUs such as garage conversions or Junior ADUs, and (2) are conducted without screening for site-specific topological, or other constraints, or regard for financial feasibility, or development likelihood.

Using HELPR to filter parcels

The core functionality of HELPR allows users to explore ten key parcel attributes in order to screen for potentially suitable sites for the housing element update. These are displayed in eight standard filter options and eight additional filter options specific to Accessory Dwelling Unit (ADU) analysis. Each filter option is based on a combination of available data and HCD site inventory guidelines on suitable sites. Multiple filter options can be combined, and the number of sites which fit all of the filtered criteria is displayed on the map and in the total number below. Each filter option is pre-populated with common choices, but users can expand the filter and enter any values. When filters are applied, the download options will yield the filtered parcels.

1.) Vacant parcels of appropriate size

Filters based on size (ACRES) and land use code (LU19). See a description of land use codes here.

HCD's site inventory guidelines indicate that vacant sites which are between 0.5 and 10 acres may not require additional analysis to demonstrate their suitability to accommodate lower-income RHNA. This query selects for existing land use (LU19) which corresponds with common types of vacant land (codes 3000, 3100, 3300, and 1900) within this size range (ACRES).

2.) Lower valued Commercial/Retail

Filters based on land use code (LU19) and improvements-to-land value ratio (IL_RATIO).

HCD's site inventory guidelines allow for the inclusion of nonvacant sites to satisfy RHNA need; however, such sites may require additional analysis to demonstrate realistic development potential. While there are many ways to demonstrate this and more than one approach may be required, the data in HELPR facilitate one such analysis which relies on property values from county assessors.

Specifically, the field IL_RATIO is the ratio of improvement assessed value to land assessed value from the county assessor's 2019 records matched with SCAG's land use data. Following a methodology developed by the Institute of Urban and Regional Development (IURD) at the University of California, Berkeley1, it is possible to screen parcels based on this one indicator of their redevelopment potential.

1 For more information, see , page 18 of SCAG draft data/map books at , or a SCAG-OCBC study on retail land use in Orange County at . The

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Multiple IL_RATIO thresholds can be explored, but the authors suggest that parcels with an I:L ratio of below 1.0 might be used for commercial properties. This query uses LU19 to identify several commercial/retail land uses (codes 1200, 1220, 1221, 1222, 1223, and 1600) with an I:L ratio below 1.0, i.e., those whose improvements are worth less than the land. Additional land use types or I:L ratios can be explored by modifying filter choices.

3.) Public-owned land Filters based on public ownership fields, PUB_OWN and PUB_TYPE. HCD's updated site inventory guidelines indicate that public ownership must be noted for sites identified in the housing element update. This filters for public owned land and eight separate public owner types: city, county, state, federal, military, school, college/university, and special district.

4.) Inside a priority growth area and outside of a constraint area Filters based on SCAG's Connect SoCal priority growth (SCAG_PGA) and constraint (SCAG_CONST) areas. Connect SoCal, SCAG's 2020-2045 Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS), prioritizes growth in areas including job centers, neighborhood mobility areas, and highquality transit areas (2045) based on their ability to support sustainable transportation. Connect SoCal also de-emphasizes growth constraint areas based on environmental factors--these were broken into absolute constraints and variable constraints based on severity. See the Connect SoCal Sustainable Communities Strategy Technical Report for details; also note that the decision of where to permit growth is determined by local land use authorities and not SCAG. While HCD's site inventory guidelines do not explicitly reference these areas, environmental constraints and accessibility are considerations. Additional parcel-level attributes on environmental constraints include sea level rise, flood, seismic, liquefaction, and landslide risk zones, protected, riparian, and wildlife habitat areas are also available separately in HELPR; see below for details. The default selection identifies only parcels within all priority growth areas and within no constraint areas. In order to make the selection less restrictive, select "Outside" to add parcels outside of individual types of areas.

5.) Outside environmentally sensitive areas Filters based on twelve individual factors relating to environmental sensitivity. To help inform site selection in the context of environmental sensitivities and climate-related hazards, users can identify and filter out parcels that intersect very high hazard wildfire areas in Local

complete publication based on IURD's study is Landis, J., Hood, H., Li, G., Rogers, T., and Warren, C. The future of infill housing in California: Opportunities, potential, and feasibility. Housing Policy Debate 17:4, p. 681-725

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Responsibility Areas (LRAs) as well as State Responsibility Areas (SRAs), one meter and two meter level rise areas, 100 year flood plains, seismic hazards, liquefaction zones, landslide risk zones, protected open space, wetland areas, wildlife habitat areas, areas with endangered plants and animals, reserve designs from the region's natural community & habitat conservation plans, and parcels with centroids that fall in active river areas. Sites with these hazards, sensitive habitats, and conserved areas should be avoided or will likely require significant remediation and/or mitigation to be utilized for future housing development. These and other environmental sensitivity areas can also be viewed as layers within the tool.

The default selection identifies only parcels outside of all such sensitive areas. In order to make the selection less restrictive, select "Inside" to add parcels inside individual types of environmentally sensitive areas.

6.) Inside higher opportunity areas

Filters based on 2021 Opportunity Scoring from the 2021 HCD/TCAC opportunity indicators.

In order to further objectives related to Affirmatively Furthering Fair Housing (AFFH), HCD has emphasized access to opportunity as a criterion for siting lower-income housing. A simple yet straightforward analytical approach is to use the HCD/TCAC opportunity scoring measures, which identify census tracts based on a variety of indicators. HELPR has joined these data to individual parcels; this filter identifies parcels based on whether they are in a highest, high, moderate/changing, moderate, low resource, or high segregation/poverty tract.

7.) Inside Environmental Justice areas

Filters based on whether a parcel is located in an EJ Area, SB 535 Disadvantaged Community, or Communities of Concern (EJA, SB535, COC).

Three designations for environmental justice described in detail in Connect SoCal's Environmental Justice Technical Report are available for use.

EJ Areas (EJA) consist of Transportation Analysis Zones (TAZs) that have a higher concentration of minority population or low-income households than is seen in the region as a whole. The inclusion of this geography helps to fulfill SCAG's Title VI requirements, along with other state and federal EJ guidelines.

Senate Bill 535 Disadvantaged Communities (DAC) consist of Census tracts that have been identified by the California Environmental Protection Agency (Cal/EPA) as DAC based on the requirements set forth in SB 535, which seek to identify areas disproportionately burdened by and vulnerable to multiple sources of pollution.

Communities of Concern (COC) are Census Designated Places (CDP) and City of Los Angeles Community Planning Areas (CPA) that fall in the upper one-third of all communities in the SCAG region for having the highest concentration of minority population and low-income households.

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To select EJA, DAC, or COC in their entirety, select the "Only" AND "Both" checkboxes. Please note that in contrast to the other available filters which identify sites based on suitability for housing, this filter specifically identifies parcels within sensitive areas.

8.) Access and location scores

Filters based on location indicators of GRCRY_1MI, HEALTH_1MI, and OPENSP_1MI.

By using regionwide data and measuring distances on a street network, SCAG has developed a rudimentary location score for each parcel in the SCAG region. InfoUSA business establishment data (2016) provide the locations of business coded as grocery stores and healthcare provider offices, while the California Protected Areas Database (2017) was used to find open spaces such as parks and beaches. Since open space varies in size, street network data was used to convert this into a rough approximation of "units" of open space, which are equivalent to a city block's worth of open space. This unit is not consistent across the region. This dataset includes the number of grocery stores, healthcare provider offices, and units of open space which can be reached in one mile on the street network from each parcel in the region.

Since accessibility to groceries, healthcare offices, and open space varies greatly across the region, this documentation (below) indicates the minimum, median, mean, and maximum number of these destinations which can be reached from parcels in each local jurisdiction. For example, demonstrating that a potential site has better than a jurisdiction's average accessibility to groceries may be helpful in demonstrating its suitability. Please note that this analysis has many limitations including the veracity and age of the data and the methodology used and is intended to provide only an illustration of how one might demonstrate accessibility.

9.) Parcels with physical space for a detached ADU, baseline assumptions

This filter provides a rudimentary estimate of which parcels have adequate physical space to accommodate a typical detached Accessory Dwelling Unit (ADU) only for single-family residential land use. A detailed study conducted by Cal Poly Pomona (CPP) and accessible here conducted an extensive review of state and local requirements and development trends for ADUs in the SCAG region and developed a baseline set of assumptions for estimating how many of a jurisdiction's parcels could accommodate a detached ADU. Please note that these estimates (1) do not include attached or other types of ADUs such as garage conversions or Junior ADUs, and (2) are conducted without screening for site-specific topological, or other constraints, or regard for financial feasibility, or development likelihood.

The baseline assumption is that single-family residential parcels can accommodate a detached ADU if the unbuilt parcel land area exceeds the size of a typical 800 sf ADU and allows for a 4-foot setback surrounding the parcel, a 600 square feet driveway, and a 200 square feet parking stall.

In addition to the baseline assumptions, seven scenarios can be selected which relax these assumptions, which would increase the estimate of the physical capacity for ADUs (i.e., more parcels identified). These assumptions and scenarios are hypothetical and have been developed by SCAG and CPP to assist

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