Commerce Zoning, Planning & Building Codes

Last reviewed: July 1, 2026

Overview

Commerce’s land-use rules are codified in Title 19 — ZONING of the Commerce Municipal Code; the short title and basic authority are set out in § 19.01.020 and § 19.01.010 . Title 19 organizes the city into conventional residential, commercial, manufacturing, public-facility, and overlay districts, and layers citywide site-planning and performance standards that apply across zones § 19.05.010; § 19.19.010 . This page explains where the rules live, the district families and major numerical controls you’ll see, the typical permit paths, and how state housing and building rules (ADUs, density bonus, etc.) interact with Commerce’s local code.

How Commerce's code is organized

• The local zoning ordinance is explicitly gathered as Title 19 — ZONING (the City of Commerce zoning ordinance) § 19.01.020 . (Despite older guidance that some cities use “Title 17,” Commerce uses Title 19.)
• Title 19 is arranged into topical chapters and divisions: general provisions and definitions, zone-by-zone chapters (Chapters 19.07–19.17), site-planning and development standards (Chapter 19.19), off‑street parking (Chapter 19.21), landscaping (Chapter 19.23), signs (Chapter 19.25), standards for specific uses (Chapter 19.31), nonconforming rules (Chapter 19.37), plus administration and permit procedures under Chapter 19.39 § 19.19.010; Chapter list cross‑refs .
• Administrative roles and hearing bodies are defined in the code: the Community Development Director, Planning Commission, and City Council (and the Planning Commission acting as the Cultural Resource Management Commission for historic matters) are the decision makers for ministerial and discretionary actions described in Table 19.39.020A § 19.39.020; § 19.39.030 .

(If you want the city’s zoning map or to start a zone‑specific lookup, begin at Commerce’s zoning menu: Commerce Zoning.)

Zoning district families

Commerce divides land into named zone categories in § 19.05.010; the city’s district families are:

• R-1 — Low‑density Residential (single‑family focus) § 19.05.010
• R-2 — Medium‑density Residential § 19.05.010
• R-3 — High‑density Residential § 19.05.010
• C-2 — Commercial § 19.05.010
• C/M-1 — Commercial‑Manufacturing § 19.05.010
• M-1 — Light Manufacturing and M-2 — Heavy Manufacturing § 19.05.010
• PF — Public Facility § 19.05.010
• Overlay and plan districts: (PD) — Planned Development Overlay and MSP — Modelo Specific Plan are explicitly listed as special overlays/specific‑plan categories § 19.05.010; § 19.16.020 .

Each zone chapter (for example, the residential chapter, Chapter 19.07) contains permitted uses, use tables, and the zone‑specific development standards (setbacks, heights, densities) that apply in that zone § 19.07.030 et seq. .

Example: the Housing Opportunity Overlay (HOO) is an overlay that carries its own numerical controls — maximum intensity 1.0 FAR, maximum height 5 stories / 60 ft., front/setback ranges, and other frontage and open‑space rules are set in the HOO development table § 19.47.040 .

Citywide development standards (what to look for)

Commerce separates where things are allowed from how they are built:

• Site‑planning, general development, and performance standards (maintenance, nuisances, landscaping, stormwater, trash storage, etc.) are citywide and apply to all zones—these are in Chapter 19.19; they are applied in addition to zone‑specific standards and, where different, the more restrictive rule controls § 19.19.010–19.19.020 .
• Typical numeric controls you will see inside zone chapters and tables:
  • Setbacks and permitted encroachments (front, side, rear, projection rules) are set in each zone table (residential and commercial examples at § 19.07.030–19.07.040 and § 19.09.050 respectively) .
  • Height limits and lot‑coverage/FAR are zone‑or overlay‑specific (see R‑zone tables and the HOO overlay table § 19.07.030; § 19.47.040 for concrete numbers) .
  • Parking: off‑street parking and loading standards are codified under Chapter 19.21, and many zone chapters cross‑reference Chapter 19.21 for parking requirements § 19.21 cross‑refs; zone cross‑refs . For density‑bonus projects Commerce also publishes reduced parking ratios in the density‑bonus rules § 19.07.240 .
• For practical guidance on site rules, check the citywide site‑planning chapter and the development‑standards menu: Commerce Development Standards. The code’s property‑maintenance and site design rules are in § 19.19.030–19.19.040 .
• If your project sits in an overlay (PD, HOO, MSP), overlay or specific‑plan numeric rules can supersede base zone standards where the specific plan says so § 19.16.020; § 19.15.040 .

If you need to check exact frontage, projection, or lot‑coverage numbers for a specific zone, use the zone’s chapter tables (e.g., residential tables in Chapter 19.07) and the city‑wide chapters referenced above § 19.07.030; § 19.19.010 .

Specific plans & overlays

• Planned Development Overlay (PD) is an overlay that is applied in conjunction with an underlying zone; PDs require a comprehensive master plan and may adjust development standards as long as open‑space, landscaping, parking and loading of the underlying zone are respected § 19.15.010–19.15.040 .
• Modelo Specific Plan (MSP) is expressly incorporated into Title 19; where the Modelo plan sets specific standards for heights, uses, parking, open space, and landscaping, the specific plan controls and supersedes conflicting parts of Title 19 § 19.16.020 .
• The city has an example overlay, the Housing Opportunity Overlay (HOO), with its own allowable FAR (1.0), maximum height (5 stories / 60 ft.), density caps and setback rules in its development table § 19.47.040 .
• For more on mapping and overlay boundaries, consult the official zoning map (on file at the city clerk) adopted under § 19.05.020 . See the overlays menu: Commerce Overlay Districts.

Building permits & review — practical permit path

• Who decides: ministerial decisions and many administrative approvals are handled by the Community Development Director; discretionary actions (CUPs, variances, site‑plan review, zone changes) are routed through the Planning Commission with appeals to the City Council as specified in Table 19.39.020A § 19.03.020; § 19.39.020 .
• Typical steps:
  1. Confirm zoning (official zoning map; see § 19.05.020) and applicable specific plan or overlay § 19.05.020; § 19.16.020 .
  2. Check use table in the zone chapter for permitted/conditional uses and cross‑references to Chapter 19.31 for standards § 19.07.020; § 19.31 .
  3. Gather site plan, elevations, landscape plan and traffic/parking information (PDs and larger projects require a master plan and traffic management plan) § 19.15.030–19.15.040 .
  4. Apply for building permits with the Building Division; the code requires compliance with local building and fire codes (see ADU rules as an example) and the California Building Standards; ministerial approvals are subject to timing standards for certain state‑mandated permits (see ADU ministerial timing) § 19.07.090 (ADU ministerial rules) . When you need the state building rules, use the city’s building code resources and the California code link: California Building Standards Code.
• Site plan review approvals are property‑specific, lapse if not implemented within one year, and may be modified or revoked under the Chapter 19.39 procedures § 19.39.690–19.39.720; § 19.39.710 .

For guidance on design control procedures, consult the design‑review menu: Commerce Design Review. Note: a previous design‑review division in Title 19 was removed (reserved) — the code shows design‑review sections are currently reserved and design review rules may be in other adopted design guidelines or specific‑plan documents (design‑review division marked reserved) § 19.39.1030—19.39.2000 reserved .

State housing law in Commerce (ADUs, density bonus, SB rules)

Commerce has integrated state housing rules into its Title 19 so that state and local requirements work together:

• ADUs / JADUs: Commerce’s rules for Accessory Dwelling Units and Junior ADUs are located at § 19.07.090. The chapter implements California Government Code ADU mandates while adding local specifics: ADUs are permitted in single‑family and multi‑family settings, have numeric size and setback rules (e.g., detached ADU height capped at 16 ft; minimum 4 ft side/rear setbacks for many new ADUs; size caps of 850 sq ft for detached one‑bed units or other maxima listed in the subsection), and the code provides for ministerial approval when standards are met and a 60‑day processing expectation § 19.07.090 (B–C) & related subsections .
  • ADU parking: Commerce requires one parking space per ADU but lists standard state exemptions (within ½ mile of transit, inside primary footprint, historic districts, car‑share nearby, etc.) and allows tandem/driveway or setback parking where approved § 19.07.090 (Off‑Street Parking rules & exemptions) .
  • ADU ministerial timing and submittal requirements (site plan, floor plan, elevations; ministerial approval absent discretionary review when standards are met) are stated in the ADU section § 19.07.090 (Submittal & ministerial approval) .
• Density bonus: Commerce has adopted local density‑bonus procedures consistent with state law in Chapter 19.07 Division 3 (density bonus), including procedures for incentives, concessions, modifications, and parking concessions (maximum parking ratios for bonus projects are prescribed in § 19.07.240; waiver/modification procedures in § 19.07.230–19.07.260) .
• SB 9 / lot splits & ministerial housing laws: Commerce’s Title 19 contains procedures for modifications of standards, ministerial reviews, and explicit references that the code is applied in conjunction with state law. Specific SB 9 implementations (ministerial two‑unit approvals or lot splits) are not explicitly named in the snippets available here; confirm current SB 9 local implementation and objective standards with the Community Development Department (see Information Gaps below) (Verify with the jurisdiction).
• Rent control / tenant protections: Commerce’s zoning code itself does not create citywide rent‑control rules in Title 19. Rent regulation would be in other municipal titles or county/state law; Title 19 focuses on land use, development standards, and housing production tools (Not found in retrieved Title 19 excerpts — verify with the jurisdiction).

For the state cross‑links and how ADU ministerial timing interacts with the state rules, see the city ADU chapter § 19.07.090 and the state ADU law references cited there § 19.07.090 purpose & compliance cross‑refs . See also the overview of state ADU changes in the California ADU handbook resource included with these materials for how height and parking rules align with state mandates (state law base height, required processing timeframes) .

Practical links to start applications:

• For uses, permitted tables, and zone rules: Commerce Zoning.
• For site standards and numeric controls: Commerce Development Standards.
• For parking specifics: Commerce Parking.
• For ADU filing and rules: Commerce ADUs.
• For overlays/specific plans: Commerce Overlay Districts.
• For state building rules that the City enforces through the Permit/Building Division: California Building Standards Code.
• For design‑review guidance or to confirm any locally adopted design standards: Commerce Design Review.

Source References

• Title 19 — ZONING (short title, authority and purpose): § 19.01.010; § 19.01.020; § 19.01.030 .
• Zones established (list of district symbols and names): § 19.05.010; § 19.05.020 .
• Planned Development Overlay (PD) requirements and application standards: § 19.15.010–19.15.040 .
• Specific plans (Modelo Specific Plan referenced): § 19.16.010–19.16.020 .
• Site planning and general development standards (citywide standards & applicability): § 19.19.010–19.19.020 .
• Off‑street parking and cross references: Chapter references and parking rules cited throughout Title 19; explicit parking concessions for density bonus: § 19.07.240 ; ADU parking rules in § 19.07.090 .
• Housing/density bonus procedures: Chapter 19.07 Division 3 and related sections (density bonus rules and application requirements; § 19.07.150 et seq.; § 19.07.240 — parking incentives) .
• ADU/JADU rules and ministerial processing (detailed standards, setbacks, sizes, parking exemptions, 60‑day ministerial approval if objective standards met): § 19.07.090 .
• HOO overlay development standards (example overlay with numeric FAR and height): § 19.47.040 .
• Administration, review bodies, and Table of review actions (who acts on changes of zone, CUPs, variances, site plan review): § 19.39.020; § 19.39.030–19.39.040 .
• Nonconforming uses and continuation/abatement rules: Chapter 19.37 (see § 19.37.040–19.37.330) .
• Design review status: design‑review provisions shown as reserved in the administration chapter (Div. 16 reserved; prior design‑review text repealed) (design‑review reserved notes, § 19.39.1030—19.39.2000 reserved) .

Information Gaps / Items to verify with Commerce staff

• SB 9 (ministerial duplex and lot‑split) local implementation specifics are not explicitly visible in the retrieved Title 19 excerpts; confirm current objective‑standard checklists and any local map‑based prohibitions with the Community Development Department (verify whether the city has adopted SB 9 objective standards or a ministerial lot‑split checklist).
• Any separate municipal titles (e.g., rent regulation/tenant protection, or up‑to‑date design guidelines) are outside Title 19 and should be checked in the broader municipal code or via planning staff.