Signal Hill Zoning, Planning & Building Codes

Last reviewed: July 3, 2026

Overview

Signal Hill’s land-use rules live in the Signal Hill Municipal Code’s zoning chapters (the Title/Chapter series labeled “20.…” in the municipal code): the city organizes zoning by conventional district chapters and a large set of Specific Plan chapters (SP‑#) that replace standard zoning on particular sites. The code centralizes project-level controls through the city’s site plan and design review process and specific-plan chapters that set area‑specific heights, setbacks, parking and design rules (for example, SP‑23 Heritage Square and the Pacific Coast Highway specific plan). The municipal code also contains a targeted, ministerial framework for two‑unit projects (local implementation of state two‑unit laws) and repeatedly incorporates state requirements (e.g., Government Code references for supportive/transitional housing). Key rules and where to find them are called out below so a developer or resident can navigate Signal Hill’s permitting path.

How Signal Hill's code is organized

• The local zoning text is organized as municipal‑code chapters beginning with the 20.xx series for zoning and specific plans (e.g., § 20.04.102 for height measurement rules; see the specific plan chapters such as § 20.26.010 for SP‑23) .
• Most project-level development rules and discretionary procedures point to the city’s Site Plan and Design Review rules in Chapter 20.52 (frequently cross‑referenced in specific plan chapters as the review path for approvals) — for example SP‑23 requires planning commission review per § 20.26.030(B) .
• Off‑street parking and parking design standards are centralized in the off‑street parking chapters that individual chapters reference (the code repeatedly directs applicants to the off‑street parking chapter when calculating spaces) — see the Pacific Coast Highway specific plan cross‑references to the parking chapter in § 20.30.050 .
• Specific plans (SP chapters) replace or refine the base zoning for mapped areas; where a specific plan applies it “prevails” over conflicting city rules (see the adoption and applicability language such as § 20.26.020–030 for SP‑23) .

(For the city’s topic landing pages referenced across this guide see Signal Hill Zoning, Land Use, Development Standards, Parking and Design Review.)

Zoning district families (what the city uses)

Signal Hill’s code mixes conventional district chapters and many site‑specific Specific Plan districts. Key, named examples you will see in the code:

• Residential district chapters (Chapter 20.10) — rules for lot sizes, densities and residential build‑form categories, including the city’s table of minimum lot area and density factors § 20.10.030–040 and the two‑unit / ministerial rules in § 20.10.041 .
• Public Institutional — PI (§ 20.14.010) — the PI district is used for public campus/institutional uses (schools, government buildings) and its purpose is stated at § 20.14.010 .
• Site‑specific Specific Plan districts (SP‑# chapters) — the code contains many SP chapters; the city uses these in place of the base zoning for targeted areas. Representative SPs (all enumerated in the code) include:
  • SP‑23 Heritage Square Central Business District (§ 20.26.010–040) — mixed‑use, pedestrian‑oriented central business district standards and required planning‑commission Site Plan & Design Review § 20.26.010; 20.26.030(B) .
  • Pacific Coast Highway specific plan (Chapter 20.30) — sets PCH-specific setbacks, landscaping and a 30‑ft curb‑measured height cap per § 20.30.045–047 .
  • SP‑7 Special Purpose Housing (multiple subareas) — targeted affordable housing specific plan with administrative site plan review references § 20.41.1105–1110 .
  • SP‑8 Signal Hill Village (§ 20.43.020–050) and SP‑24 Town Center Northwest (§ 20.46.010–040) — mixed‑use / village objectives and SP review procedures .
  • Industrial and auto‑center special plans (e.g., SP‑19 General Industrial and SP‑4 Auto Center) with heavier equipment/height allowances and truck‑oriented standards § 20.39.040–050; § 20.47.010–020 .
• Overlay and special purpose chapters — the code contains overlay‑style chapters (e.g., the storage‑yard overlay § 20.21.020–060) that modify setbacks/maintenance within mapped overlay areas .

(When you see a mapped SP or overlay on the official zoning map, that SP/overlay text governs the site — the SP chapters explicitly state they “apply to all property shown” as that SP, e.g., § 20.26.020 for SP‑23) .

Citywide development standards — how the rules look in practice

Signal Hill distributes standards across base chapters and SP chapters; below are the recurring, city‑wide topics and where the controlling language typically lives.

• Setbacks and yard rules

  • Base residential lot and yard rules are in Chapter 20.10 (see minimum lot area/density § 20.10.030–040) and specific setback rules are repeated in each SP (for example SP‑13 area rules for front/side/rear setbacks § 20.33.240–250) .
  • The Pacific Coast Highway specific plan sets PCH setbacks (buildings 10 ft from future R.O.W.; parking lots 5 ft) under § 20.30.045 .

• Height limits

  • Height measurement is standardized by the code measurement rule (§ 20.04.102 is the measurement reference used throughout SP chapters) and individual chapters set numeric caps (examples: 30 ft maximum in the PCH specific plan § 20.30.047; 25 ft caps in many residential SPs such as SP‑13 § 20.33.230; industrial SP‑19 allows up to 60 ft per § 20.39.050) .

• Lot coverage / FAR

  • Lot coverage limits appear in some targeted sections (for example the city’s two‑unit project rules include a maximum lot coverage 50% for two‑unit projects; see § 20.10.041 unit standards) — but the code handles lot coverage variably by district and SP; check the applicable SP or Chapter 20.10 for base lot coverage rules § 20.10.041 .

• Off‑street parking (how many spaces and design)

  • Parking counts and stall design are handled by the off‑street parking chapter(s) the SPs point to; SPs always cross‑reference the parking chapter when specifying required spaces (for example, Pacific Coast Highway SP requires compliance with the off‑street parking chapter § 20.30.050 and other SPs list exact ratios or delegate to Chapter 20.70/20.72) . For a project, the applicable SP and the off‑street parking chapter together determine required spaces.

• Landscaping, water efficiency and hardscape limits

  • SP chapters include landscaping and turf‑replacement rules; e.g., SP‑13 and several SPs require landscaped setback areas and limit hardscape in front setbacks (§ 20.33.255) and the Pacific Coast Highway SP requires landscaped yards per § 20.30.045(B) .

• Signs and mechanical screening

  • Sign rules are centralized in Chapter 20.58 and referenced by SPs; SPs typically restrict signage to a single project nameplate and refer applicants to Chapter 20.58 for sign compliance (see e.g., § 20.33.140; § 20.30.080) .

For quick navigation, view the city’s Development Standards and Parking topics and consult the specific plan chapter that covers your parcel.

Specific plans & overlays — where the city customizes zoning

• Specific plans are the primary tool Signal Hill uses to implement area‑level rules; each SP chapter describes purpose, boundary/adoption language and then sets use classifications, development standards, heights, setbacks, parking, utilities and the required review path (example: SP‑23 § 20.26.010–040; SP‑7 § 20.41.1105–1115) .
• Examples to reference immediately:
  • SP‑23 Heritage Square — mixed‑use CBD standard and explicit requirement for planning commission site plan & design review § 20.26.010; 20.26.030(B) .
  • Pacific Coast Highway Specific Plan (Ch. 20.30) — PCH setbacks, 30‑ft height cap and traffic/transportation improvement rules § 20.30.045–060 .
  • SP‑19 General Industrial Specific Plan — industrial setbacks, truck‑weight street standards and a 60‑ft height allowance § 20.39.040–050 .
• Overlay districts (for example the storage/maintenance overlay at § 20.21) modify setbacks, maintenance and screening standards for mapped properties and are enforced by their chapter text § 20.21.020–060 .

(See the city’s Overlay Districts and Historic Preservation pages for context when an overlay or historic designation affects your site.)

Building permits & review — the typical path

• Pre‑application / entitlement hierarchy
  • The code routinely requires Site Plan & Design Review before building permits are issued; residential projects require planning director/commission review per § 20.10.160(A) and multiple SPs explicitly require compliance with Chapter 20.52 before building permits are issued § 20.10.160(B) .
• Ministerial vs. discretionary review
  • Many specific plans allow administrative (director) or planning‑commission Site Plan & Design Review depending on project size; SP‑7, for example, routes affordable housing projects to Director administrative site plan review or planning commission as specified (§ 20.41.1110(B)) .
  • The city adopted a ministerial two‑unit project path (local implementation of state two‑unit rules / Government Code § 65852.21): two‑unit project applications are approved or denied ministerially by the Director of Community Development and approvals do not take effect until required documents are recorded (see § 20.10.041 and its numbered “Unit standards” requirements, including notice, deed‑restriction and lot‑eligibility rules) .
• Appeals and final approvals
  • Director decisions identified in specific plan chapters are often appealable to the Planning Commission (and thence to Council) with timelines and fees established in the chapter’s appeals language — example appeal language in SP‑24 § 20.46.040(B) .
• Building code compliance and permits
  • All construction is still subject to the California Building Standards/Title 24 and local building & safety checks (SP texts reference compliance with city standard plans and building codes for utilities and grading—see, e.g., § 20.33.160 and multiple SP utility provisions) . For building‑code technical requirements consult the California Building Standards Code resources and the city Building & Safety counter.

(First practical step for any parcel: check the Official Zoning Map to see if the parcel is inside an SP or overlay; then read that SP chapter for the site‑specific development standards.)

State housing law in Signal Hill

The local code explicitly acknowledges and incorporates multiple state housing rules in its text; below are the major interactions and what the code says locally.

• Transitional/supportive/group homes by‑right

  • Multiple SP chapters make transitional housing, supportive housing and licensed group homes serving six or fewer persons an allowed use “by right” consistent with California Government Code § 65583 — see SP‑13 § 20.33.200(A)(1), SP‑8 § 20.43.030(A) and SP‑7 § 20.41.1115(A) (among others) .

• Two‑unit projects (local implementation of state two‑unit / urban lot provisions)

  • Signal Hill has a dedicated two‑unit project provision in the residential chapter: § 20.10.041 sets the ministerial approval route, defines “two‑unit project,” lists unit standards (unit sizes, height caps, lot‑coverage cap 50%, minimum open space 15%, demolition cap, owner‑occupancy and deed‑restriction requirements), required notices and that approval is ministerial by the Director § 20.10.041 . The two‑unit rules also reference the city’s urban lot split definition and related subdivision rules (see cross‑references to § 18.48.020 in the two‑unit rule text) .

• Accessory dwelling units (ADUs) and JADUs

  • The two‑unit provision expressly acknowledges that a lot that is not created by an urban lot split “may have a two‑unit project under this section, plus any ADU or JADU that must be allowed under state law,” indicating the city defers to state ADU entitlements where required by California law (§ 20.10.041). The municipal code text does not reproduce the full statewide ADU rules in the snippets retrieved here; for ADU technical limits consult the city ADU page and the California ADU law resources and the California Building Standards referenced by the state (see § 20.10.041) . (Local ADU implementing language beyond those references was not found in the retrieved portions—see Information Gaps below.)

• Density bonus, SB‑9, and other statewide programs

  • The municipal code contains the local two‑unit (ministerial) rules and explicit cross‑references to Government Code provisions for supportive housing and two‑unit rules; however a discrete local “density bonus” chapter or an exhaustive SB‑9 implementation chapter was not found in the retrieved materials. Verify with the Community Development Department for current local implementing ordinances for density bonus (Government Code § 65915), SB‑9 urban lot split stand‑alone procedures beyond the two‑unit rules, or local changes after the materials retrieved here.

• Rent control / tenant protections

  • The retrieved zoning/specific‑plan chapters do not create rent‑control rules; in Signal Hill the zoning chapters reference occupancy restrictions and deed restrictions for two‑unit projects and specific purpose housing SPs impose occupancy covenants for affordability (see § 20.41.1115(C) and SP covenants language) — but no general citywide rent control ordinance appears in the retrieved zoning text. If you need landlord/tenant or rent stabilization rules, verify with the City Clerk or the City Attorney’s office (Not found in retrieved materials) .

Practical summary: how state ADU/SB9/density rules show up in practice

• ADUs: the code acknowledges state ADU entitlements in the two‑unit section and defers to state law where required § 20.10.041; consult the city ADU page for the local submittal checklist and Building & Safety for Title 24 compliance .
• Two‑unit (SB‑9 style) projects: the city has a ministerial two‑unit standard with explicit unit‑size, height, lot‑coverage and public‑notice obligations § 20.10.041; approvals are ministerial and conditioned on recorded deed restrictions and other required documents § 20.10.041(D) .
• Density bonus: check with the city; no dedicated local density‑bonus implementation text was discovered in the retrieved chapters (Verify with the jurisdiction) (Not found in retrieved materials).

Source References

• Signal Hill Municipal Code — Pacific Coast Highway Specific Plan (Chapter 20.30): § 20.30.045–047 and cross‑references .
• Signal Hill Municipal Code — Heritage Square SP (Chapter 20.26): § 20.26.010–040 .
• Signal Hill Municipal Code — Residential Districts and Two‑Unit Projects (Chapter 20.10; § 20.10.030–041) .
• Signal Hill Municipal Code — SP‑7 Special Purpose Housing (Chapter 20.41): § 20.41.1105–1125 .
• Signal Hill Municipal Code — General Industrial Specific Plan (SP‑19, Chapter 20.39): § 20.39.040–050 .
• Signal Hill Municipal Code — SP‑8 (Village) and SP‑24 (Town Center Northwest) chapters: § 20.43.020; 20.46.010–040 .
• Signal Hill Municipal Code — Overlay/storage yard chapter § 20.21.020–060 .
• Two‑unit project details (unit standards, notice, deed restriction, ministerial approval): § 20.10.041 and supporting subsections in the residential chapter .
• Signal Hill Municipal Code — off‑street parking cross‑references and parking ratios called out in SPs (see SP examples § 20.30.050; 20.49.070; 20.41.965) .
• California ADU handbook and statewide ADU statutory context (useful companion for ADU practice) .