Signal Hill, California Zoning Map

The numbered SP zones represent individually tailored development frameworks created over decades as former oil production sites were reclaimed for new uses. Each specific plan sets its own permitted uses, density or intensity limits, design standards, and sometimes phasing or infrastructure requirements. Buyers of SP-zoned parcels must obtain and review the specific plan document to understand actual development potential - the SP designation alone does not indicate yield.

Signal Hill was one of California's most prolific oil fields, and while surface extraction has largely ceased, environmental conditions from legacy operations are a significant due-diligence consideration. Many parcels in the industrial and specific plan zones have documented oil field contamination requiring Phase I and Phase II environmental assessments, and remediation costs can be substantial. Signal Hill has remediation programs and oversight in place, but buyers should verify current regulatory status for each parcel.

Residential zones include Residential Low Density (RL) at 18 acres, RLM-1 and RLM-2 (Low Medium) at 105 combined acres, and Residential High Density (RH) at 73 acres. Many residential specific plans (SP-13 through SP-22) govern smaller infill sites. California ADU law and density bonus provisions apply across all residential zones. The Crescent Heights Historic District Specific Plan (SP-11 at 9 acres) adds design preservation requirements in that area.

The Pacific Coast Highway Specific Plan (SP-10, 14 acres) and Commercial General (CG, 34 acres) zone address retail and commercial development along the city's primary commercial arterials. The Commercial Town Center (CTC) at 13 acres anchors the city's urban retail core and supports higher-density mixed-use formats. The Gateway Center North Specific Plan (SP-12, 14 acres) adds another planned commercial node. Ground-floor retail with residential above is increasingly the preferred format for mixed-use projects given Signal Hill's walkable urban location.

The CI zone at 103 acres accommodates users who need a hybrid of commercial services, light assembly, contractor storage, and office functions on a single site. This zoning is well-suited to building materials distributors, HVAC contractors, and specialty trade businesses that require both customer-facing space and on-site production or storage. Signal Hill's central location within the Long Beach industrial market, with access to the Ports of Long Beach and Los Angeles, makes CI parcels attractive to last-mile and regional distribution operators.