Local zoning · Commerce

Commerce — Development Standards

Development Standards under the Commerce local zoning and planning code, with the controlling citations.

Ask a question free See coverage

Last reviewed: July 1, 2026

Overview

This page summarizes the City of Commerce zoning development standards (dimensional controls: setbacks, height, lot coverage, density, FAR) as written in the Commerce Municipal Code (Title 19). It is Commerce-specific and focused only on zoning development standards — not building code/Title 24, permitting procedures, or tenant law. Where the code sets different rules by district, each district is treated separately below and anchored to the controlling code citation.

Important cross-links you will see in the text: first mention of parking links to the city's Commerce Parking page; design-review references link to Commerce Design Review; overlays to Commerce Overlay Districts; ADU rules link to Commerce ADUs; references to state building standards link to the California Building Standards Code; landscaping links to Commerce Landscaping and Screening.

District-by-district development standards

Notes on how citations are shown: each requirement below is grounded in the Commerce Municipal Code and cites the controlling code section (the § number) followed by the file preview marker from the ordinance text I searched.

Residential — R-1 (Low Density), R-2 (Medium), R-3 (High)

Purpose and typical uses

  • R-1: single‑family detached (protect stability of single‑family areas). § 19.07.010 .
  • R-2: single‑family and duplex; medium density. § 19.07.010 .
  • R-3: higher-density multi‑family residential. § 19.07.010 .

Key dimensional standards (summary — see table below for the full set)

  • Maximum density: R-1 up to 8.70 du/ac, R-2 8.71–14.52 du/ac, R-3 21.78 du/ac. § 19.07.030 .
  • Front setback: R-1 20 ft, R-2 20 ft, R-3 15 ft minimum. § 19.07.030 .
  • Side yards: generally 10% of average lot width each side (with minimum 3 ft, maximum 5 ft) in R‑1/R‑2; R‑3 typically 5 ft each side. § 19.07.030 .
  • Rear yard: 15 ft minimum across R‑1/R‑2/R‑3. § 19.07.030 .
  • Max building height: R-1/R-2 25 ft (2 stories); R-3 35 ft (3 stories). § 19.07.030 .
  • Maximum lot coverage / FAR: typical single‑family rules use an allowable floor area and max lot coverage ~45%, with floor area rules described in § 19.07.030. § 19.07.030 .
  • Definitions for “front/rear/side yard” are in the definitions chapter. § 19.45.260 .

Accessory dwelling units (ADUs)

  • Commerce has a dedicated ADU article; detached ADU height limit is 16 ft, minimum side/rear setbacks 4 ft (some existing‑structure conversions may keep existing setbacks), and ADU parking rules are the code’s objective standards with several exemptions. See § 19.07.090 for Commerce ADU rules and requirements. § 19.07.090 .

Where this applies

  • Citywide in all parcels mapped as R-1, R-2, or R-3 on the official zoning map; precise block/parcel application is verified with the city’s zoning map. § 19.05.020 .

Practical notes

  • Garage setbacks, permitted projections (eaves, porches, balconies) and fence rules are spelled out in related tables so check § 19.07.040 and § 19.07.050 when designing minor projections. § 19.07.040 .

Commercial — C-2 (General Commercial)

Purpose and typical uses

  • C-2 supports general commercial businesses (retail, offices, service uses) with restrictions where abutting residential. See the C‑zone chapter for permitted uses. § 19.09.030 .

Key dimensional standards

  • Minimum lot area: 15,000 sf. § 19.09.030 .
  • Max height near residential: 50 ft, 2 stories within 500 ft of residential. § 19.09.030 .
  • Front yard: where abutting residential or park/school use, must match adjoining residential front yard; otherwise 5 ft. § 19.09.030 .
  • Side/rear setbacks: variable; if adjoining residential, 10 ft side and 10 ft rear. § 19.09.030 .
  • Max lot coverage: 50%; Max FAR: 0.5:1. § 19.09.030 .

Where this applies

  • Parcels zoned C-2 on Commerce’s official zoning map. § 19.05.020 .

Practical notes

  • Commercial permitted projections into setbacks and special fence/ wall rules are listed in the same chapter; coordinate sign design with the Commerce Signage rules and parking layout with the Commerce Parking standards. § 19.09.050 .

Manufacturing / Industrial — C/M-1, M-1, M-2

Purpose and typical uses

  • Industrial zones permit light‑to‑heavy manufacturing, warehousing, and industrial services; however, Commerce has tools (like the Housing Opportunity Overlay) to convert underutilized industrial sites. See Chapter 19.11 for manufacturing development standards. § 19.11.010 and § 19.11.040 .

Key dimensional standards (high‑level)

  • Minimum lot area: C/M-1 and M-1 20,000 sf, M-2 25,000 sf. § 19.11.040 .
  • Maximum building height: varies — C/M-1 up to 90 ft where not adjacent to residential; M‑1 generally 50 ft; M‑2 often 50 ft within 100 ft of residential but may be unlimited away from residential (check § 19.11.040 and accompanying figure). § 19.11.040 .
  • Setbacks: front yards 5–15 ft depending on subzone; side/rear yards at least 5–10 ft when adjacent to residential/parks/schools. § 19.11.040 .
  • Max lot coverage: 50–60% depending on subzone; FAR 1–2:1 per subzone. § 19.11.040 .

Special rules

  • Manufacturing districts have explicit fence/wall height tables and require solid masonry walls where adjoining residential, school, church, or park. § 19.11.050 .

Where this applies

  • On parcels zoned C/M-1, M-1, M-2; check the official zoning map and Figure references in the code for edge conditions. § 19.05.020 .

Practical notes

  • For warehouse, truck terminal and loading design, the code sets additional performance and queuing requirements (Chapter 19.31 divisions). Confirm required queuing, screening and loading orientation. § 19.31.640 .

Public Facility — PF

Purpose and typical uses

  • PF is for governmental, institutional, public service uses (libraries, schools, public parking). § 19.13.030 .

Key dimensional standards

  • Minimum lot area: 15,000 sf. § 19.13.030 .
  • Max building height: 35 ft if adjacent to residential (otherwise greater limits may apply). § 19.13.030 .
  • Front/side/rear setbacks: 15 ft/10 ft/20 ft respectively. § 19.13.030 .
  • Max lot coverage: 50%, FAR typically 0.5:1 near residential, 1.5:1 otherwise. § 19.13.030 .

Overlay zones — Planned Development (PD) and Housing Opportunity Overlay (HOO)

  • PD overlay: flexible, used with an underlying zone to allow a master plan; PD projects require CUP and zone change and must still meet open space, landscaping and parking from the underlying zone unless the PD specifically modifies them. § 19.15.040 . See the city’s Commerce Overlay Districts page for context.
  • HOO (Housing Opportunity Overlay): an overlay to allow housing on underutilized industrial sites. Key HOO standards: maximum residential density 40 du/ac, nonresidential intensity 1.0 FAR, max height 5 stories / 60 ft, front/street side setbacks 0–15 ft, interior side 5 ft (10 ft if abutting residential), rear yard 10 ft (residential portion). § 19.47.040 .

Practical guidance on overlays

  • Overlays may supersede underlying zone standards where the overlay expressly does so; the HOO explicitly allows reduced setbacks, higher FAR and different coverage. Always confirm which rules prevail for a parcel because a PD or specific plan (e.g., Modelo Specific Plan) can override Title 19 in whole or in part. § 19.16.020 .

Decision‑relevant standards at a glance

District / Standard (most used by applicants) Typical control (highlight) Code reference
R‑1 — front setback 20 ft, height 25 ft (2s), max lot coverage 45%, density up to 8.70 du/ac Front yard 20 ft, side 10% avg width (min 3 ft), rear 15 ft § 19.07.030
C‑2 (Commercial) — min lot 15,000 sf, height 50 ft within 500 ft of residential, FAR 0.5:1, lot coverage 50% Height limit and setbacks when near residential uses § 19.09.030
M‑2 (Heavy Mfg) — min lot 25,000 sf, height 50 ft near residential (else unlimited), lot coverage 60%, FAR 1:1 Industrial standards and walls where abutting residential § 19.11.040
HOO (Overlay) — density 40 du/ac, 1.0 FAR (nonres), height 5 stories/60 ft, setbacks 0–15 ft Overlay allows intensified residential conversion of M‑2 sites § 19.47.040
ADUs (city ADU rules) Detached ADU height 16 ft, side/rear setbacks 4 ft, parking exemptions in § 19.07.090 § 19.07.090

Checklist (applicant must satisfy)

  • Confirm parcel zone and any overlays on the official zoning map (verify with the Community Development counter). § 19.05.020
  • Confirm applicable district standards (setbacks, height, lot coverage, density/FAR) for the district: R‑1/R‑2/R‑3: § 19.07.030 ; C‑2: § 19.09.030 ; M‑2: § 19.11.040 ; HOO overlay: § 19.47.040
  • If proposing ADUs, ensure compliance with the Commerce ADU rules (height 16 ft, setbacks 4 ft, parking rules/exemptions). § 19.07.090 and consult the state requirements at the California Building Standards Code.
  • Demonstrate compliance with Commerce Landscaping and Screening and public‑open‑space rules required by the district. § 19.11.040
  • Prepare parking and loading consistent with the off‑street rules; coordinate with Commerce Parking. § 19.21 (see code)
  • Determine whether design review is required and, if so, follow Commerce Design Review submittal standards. § 19.39 (administration / discretionary procedures)
  • If requesting minor relief (small reductions/increases), consider a Modification of Standards or Variance. Modifications are strictly limited (e.g., up to 20% decrease in setbacks; 10% increase in height). § 19.39.560

Risks & Ambiguities

Issue Why it matters What to verify
Overlay vs underlying zone conflict Overlay (PD, HOO) may expressly override base zone dimensional standards; relying on base zone only can under/over-estimate allowable intensity Confirm which ordinance (PD or specific plan) applies to the parcel; read § 19.16.020 and the specific overlay chapter. § 19.16.020
Graphic figures and “height by setback” rules Manufacturing height adjacent to residential references a figure (illustration) and textual rule that affect permitted height Request the code figure and any staff interpretation; verify measured grade used for height calculations. § 19.11.040
ADU owner‑occupancy and deed restriction exceptions State and local rules interact and some owner‑occupancy or deed restriction rules vary by date Confirm whether the project is subject to the owner‑occupancy rule or the post‑2020 exemptions in § 19.07.090. § 19.07.090
Setback for projections and permitted encroachments Tables allow certain projections (eaves, balconies, porches) into setbacks but with limits; missing one rule can force redesign Check the permitted projection tables for the zone (e.g., § 19.07.040, § 19.13.040, § 19.11.040). § 19.07.040
Parcel‑specific exceptions (specific plans, PDs) Specific plans like Modelo may entirely override Title 19 for covered blocks Verify whether the parcel is within Modelo Specific Plan or another specific plan before relying on Title 19. § 19.16.020

Plain‑English summary

Commerce’s zoning code specifies how tall, close to the lot lines, and how dense buildings may be by district. For example, single‑family neighborhoods (R‑1) generally require 20 ft front yards and cap height at 25 ft, commercial (C‑2) limits lot coverage and sets special height limits near homes, manufacturing (M‑2) can be much taller but tightens rules near residential zones, and the HOO overlay allows up to 40 du/acre and 5 stories/60 ft where applied. Always confirm the parcel’s zone/overlay, and check § 19.07.030, § 19.09.030, § 19.11.040 and § 19.47.040 in the Commerce code for the controlling numbers before final design.

Source References

  • Commerce Municipal Code, Residential development standards table: § 19.07.030.
  • Commerce Municipal Code, ADU standards: § 19.07.090.
  • Commerce Municipal Code, Commercial development standards: § 19.09.030.
  • Commerce Municipal Code, Manufacturing development standards: § 19.11.040.
  • Commerce Municipal Code, Public Facility development standards: § 19.13.030.
  • Commerce Municipal Code, Planned Development overlay rules: § 19.15.040.
  • Commerce Municipal Code, Housing Opportunity Overlay (HOO) standards: § 19.47.040.
  • Commerce Municipal Code, Modification of standards (minor deviations): § 19.39.560.
  • Commerce Municipal Code, yard definitions: § 19.45.260.
  • Commerce ADU & state implementation context (handbook / state code summaries) — ADU best‑practice notes used only for context where Commerce code refers to state law. Not the local ordinance text.

Information Gaps

  • Parcel‑level confirmations (exact zoning/overlays for a specific address) — Not found in retrieved materials; verify with the City’s zoning map or staff. § 19.05.020 .
  • Some code figures and graphics referenced (e.g., setback/height illustration for M‑2 adjacency) are referenced but the graphic itself was not in the text snippets I reviewed — request the zoning code figure or staff interpretation. § 19.11.040 .
  • Any site‑specific interpretations (exceptions, development agreements, recorded PDs or specific‑plan amendments) — Verify with Community Development staff and specific plan documents. § 19.16.020 .

Sources

Retrieved passages

  • Commerce Zoning Code (Chapter 19.19.) High relevance
  • Commerce Zoning Code (§ 1) High relevance
  • Commerce Zoning Code (§ 1) Medium relevance
  • California Building Code (Title 19) Medium relevance
  • Commerce Zoning Code (Title 19.) Medium relevance
  • CBC § 66314 (§ 66314) Medium relevance
  • Commerce Zoning Code (Chapter 19.31.) Medium relevance
  • Commerce Zoning Code (§ 1) Medium relevance
  • Commerce Zoning Code (section shall) High relevance
  • Commerce Zoning Code (§ 4) High relevance
  • Commerce Zoning Code (Chapter 19.39) High relevance
  • Commerce Zoning Code (Chapter 19.39) High relevance
  • Commerce Zoning Code (§ 1) High relevance
  • Commerce Zoning Code (Chapter 19.27) High relevance
  • Commerce Zoning Code (Chapter 19.07) High relevance
  • Commerce Zoning Code High relevance
  • California Building Code High relevance
  • CBC § 17958.1 (Section 17958.1) High relevance
  • Commerce Zoning Code (Chapter 19.07) Medium relevance
  • Commerce Zoning Code (§ 1) Medium relevance

Cited sections

Frequently asked questions

What can I build on an R‑1 lot in Commerce?

Most R‑1 lots are for detached single‑family homes; the district’s development standards set maximum density up to 8.70 du/acre, a 20 ft front setback, side yard rules proportional to lot width (min 3 ft), and a 25 ft height cap (two stories). See the residential development table in § 19.07.030 for all dimensional controls.

What are Commerce setback requirements for single‑family homes?

Commerce’s single‑family setback minima are: front 20 ft, rear 15 ft, and side yards = 10% of average lot width (min 3 ft) for R‑1/R‑2 (R‑3 differs). Confirm the lot’s zoning and the full table in § 19.07.030.

Do ADUs in Commerce need parking?

ADU parking is governed by Commerce’s ADU rules; Commerce requires one off‑street space per ADU but lists a set of exemptions (e.g., within 1/2 mile of transit, part of primary residence, car share nearby). See § 19.07.090 for the Commerce list and exemptions.

How tall can I build in a manufacturing zone (M‑2)?

Height in M‑2 is context‑sensitive: it may be 50 ft within 100 ft of residential/school/park, and might be unlimited elsewhere, but where adjacent to residential the maximum is determined by a setback/height illustration and text in the manufacturing chapter. Check § 19.11.040 and request the referenced figure if needed.

What does the Housing Opportunity Overlay (HOO) change?

The HOO allows intensified residential use on certain industrial parcels — notable changes include up to 40 du/ac, up to 5 stories or 60 ft, reduced front/street‑side setbacks (0–15 ft), and different lot‑coverage/FAR rules. See the HOO development standards table in § 19.47.040.

Can I get a minor reduction in a required setback?

Commerce allows a “Modification of Standards” for minor adjustments (e.g., a decrease of up to 20% of required setback area, up to 10% increase in building height, or up to 5% in lot coverage) through an administrative process; larger changes require a variance. See § 19.39.560.

Where are the definitions for “front yard” and “required yard”?

Definitions for yard terms, including “Front yard,” “Rear yard,” and “Required yard,” are in the code definitions chapter; see § 19.45.260.

Do planned developments (PD) have to meet underlying zone parking and landscaping?

A PD can vary development standards from the underlying zone, but it still must comply with open space, landscaping, parking and loading requirements of the underlying zone unless the PD specifically modifies them. See § 19.15.040.

Are balconies or eaves allowed to project into setbacks?

Yes — Commerce’s permitted projection tables list allowable encroachments (e.g., eaves up to 2 ft in many zones; porches may project 6 ft into a front yard in residential zones). Check the permitted projections table for your zone (see § 19.07.040 and the comparable tables in each chapter).

When does the HOO override manufacturing standards?

The HOO chapter states that development in the HOO must follow the HOO development standards table — where the overlay provides different dimensional specifications (height, FAR, setbacks) those prevail for HOO‑covered parcels. See § 19.47.040 and the HOO chapter.

More in Commerce code

Ask about any Commerce property

Get a cited, plain-English answer on Commerce zoning, setbacks, FAR, ADUs and permits — for any address.

Start Free Trial

More Commerce zoning topics

Commerce Zoning

Commerce Land Use

Commerce Parking

Commerce Design Review

Commerce Overlay Districts

Commerce Historic Preservation

Commerce Signage

Commerce Nonconforming Uses

Commerce Variances and Exceptions

Commerce Landscaping and Screening

Commerce overview