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Earlier editions: 2026-09

Title 22 — DEVELOPMENT CODE›Article II — ZONING DISTRICTS AND ALLOWABLE LAND USES

Diamond Bar Municipal Code § 22.06.030 Zoning map adopted

Diamond Bar Municipal Code · 2026-10 edition · updated 2026-10-04 · Diamond Bar

Cite as: Diamond Bar Municipal Code § 22.06.030 · Text as of 2026-10-04

Sec. 22.06.010. - Purpose of chapter.

This chapter establishes the zoning districts applied to property within the city, determines how the zoning districts are applied on the zoning map, and provides general permit requirements for development and new land uses.

(Ord. No. 02(1998), § 2, 11-3-98)

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Sec. 22.06.020. - Zoning districts established.

Diamond Bar shall be divided into zoning districts which implement the general plan. The zoning districts shown in Table 2-1 are established, and shall be shown on the official zoning map (section 22.06.030).

TABLE 2-1 ZONING DISTRICTS

Zoning Map Symbol Zoning District Name General Plan Land Use Category Implemented by Zoning District (1)
Residential Zoning Districts Residential Zoning Districts Residential Zoning Districts
RR Rural Residential Rural Residential
RL Low Density Residential Low Density Residential
RLM Low/Medium Density Residential Low-Medium Density Residential
RM Medium Density Residential Medium Density Residential
RMH Medium/High Density Residential Medium-High Density Residential
RI-I High Density Residential High Density Residential
RH-30 High Density Residential-30 units/acre High Density Residential-30 units/acre
Commercial/Industrial Zoning Districts Commercial/Industrial Zoning Districts Commercial/Industrial Zoning Districts
OP Office, Professional Professional Office
OB Office, Business Professional Office
CO Commercial Office Commercial Office
C-I Neighborhood Commercial General Commercial
C-2 Community Commercial General Commercial
C-3 Regional Commercial General Commercial
I Light Industry Light Industrial
Special Purpose Zoning Districts Special Purpose Zoning Districts Special Purpose Zoning Districts
AG Agricultural Agriculture
OS Open Space/Conservation Open Space
REC Recreation Golf Course
Park
Private Recreation
SP Specific Plan Planning Area
Specific Plan Overlay
Overlay Districts Overlay Districts Overlay Districts
PD Planned Development All
C-3-PD/Hotel (2) Hotel Overlay General Commercial

Notes:

(1) The general plan designations for public facilities, water, and school are implemented by all zoning districts.

(2) See section 22.14.040 and chapter 22.32.

(Ord. No. 02(1998), § 2, 11-3-98; Ord. No. 06(2013), § 3(Exh. A), 9-3-13; Ord. No. 07(2013), § 3(Exh. A), 9-17-13; Ord. No. 01(2014), § B.4, 2-4-14)

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Sec. 22.06.030. - Zoning map adopted.

The council hereby adopts the City of Diamond Bar Zoning Map (hereafter referred to as the "zoning map"), which is on file with the department.

(1) Inclusion by reference. The zoning map, together with all legends, symbols, notations, references, zoning district boundaries, and other information on the maps, has been adopted by the council in compliance with Government Code § 65800 et seq., and is hereby incorporated into this Development Code by reference as though it were fully included herein.

(2) Zoning district boundaries. The boundaries of the zoning districts established by section 22.06.020 (Zoning districts established) shall be shown upon the zoning map.

(3) Relationship to general plan. The zoning map shall implement the general plan, specifically including the land use map.

(4) Map amendments. Amendments to the zoning map shall follow the process established in chapter 22.70 (General Plan, Development Code, and Zoning Map Amendments).

(5) Zoning map interpretation. The zoning map shall be interpreted in compliance with section 22.04.020(g) (Rules of interpretation—Zoning map boundaries).

(Ord. No. 02(1998), § 2, 11-3-98)

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Sec. 22.06.040. - Zoning district regulations.

(a) Purpose. Chapters 22.08 through 22.14 determine which land uses are allowed in each zoning district established by section 22.06.020 (zoning districts established), what land use entitlement is required to establish each use, and the basic development standards that apply to allowed land uses in each zoning district.

(b) Zoning consistency matrix. Subsequent to the adoption of this Development Code, the City of Diamond Bar's zoning map shall be revised to reflect consistency with the general plan land use map. In the interim period, until the revised map is adopted by the council, the Zoning Consistency Matrix (Table 2-2) is adopted applying equivalent Development Code standards to the city's existing zoning districts.

(c) Determination of allowable land uses and permit requirements. The uses of land allowed by this Development Code in each zoning district are identified in Tables 2-3, 2-5, 2-6 and 2-8 of this chapter as being:

(1) Permitted subject to compliance with all applicable provisions of this Development Code, subject to first obtaining a zoning clearance (chapter 22.46), and any building permit or other permit required by the Municipal Code. These are shown as "P" uses in the tables;

(2) Allowed subject to the approval of a minor conditional use permit (chapter 22.56), and shown as "MUP" uses in the tables;

(3) Allowed subject to the approval of a conditional use permit (chapter 22.58), and shown as "CUP" uses in the tables;

Land uses that are not listed in the tables or are not shown in a particular zoning district are not allowed, except as otherwise provided by section 22.04.020(h) (Rules of interpretation—Allowable uses of land), or section 22.02.030 (Exemptions from development and land use approval requirements).

(d) Standards for parcels with multiple zoning districts. The following standards apply to the proposed development or subdivision of parcels that are or may be designated with more than one zoning district:

(1) Existing parcel in multiple zoning districts. Where an existing parcel is zoned in two or more zoning districts, each portion of the parcel in a separate district shall be developed/used in compliance with the requirements of the applicable district.

(2) Parcels proposed for consolidation. Where a lot line adjustment or tentative map application proposes the consolidation of two or more parcels, so that a single parcel would be covered by two or more zoning districts, the application for adjustment or map approval shall be accompanied by an application for rezoning the lot into a single zoning district, in compliance with chapter 22.70 (General Plan, Development Code, and Zoning Map Amendments).

(e) Conflicts between provisions. Rules for resolving conflicts between different Development Code provisions may be found in section 22.04.020(f) (Rules of interpretation—Conflicting requirements).

TABLE 2-2 ZONING CONSISTENCY MATRIX

General Plan Designation Existing Zoning District Applicable Development Code Standards
Agriculture (AG) Max 1 DU/AC Light Agriculture A-1 Heavy Agriculture A-2 Agriculture (AG)
Rural Residential (RR) Max 1 DU/AC R-1 40,000 R-1 20,000 Rural Residential (RR)
Low Density Residential (RL) Max 3 DU/AC RPD 20,000 R-1 15,000 R-1 10,000 RPD 10,000 R-A 10,000 R-1 9,000 R-1 8,500 PA-2 /SP Low Density Residential (RL)
Low Medium Residential (RLM) Max 5 DU/AC R-1 8,000 RPD 8,000 R-A 8,000 R-1 7,500 R-1 6,000 R-2 Low Medium Residential (RLM)
Medium Density Residential (RM) 12 DU/AC R-3 up to 12U Medium Density Residential (RM)
Medium High Density Residential (RMH) 16 DU/AC R-3 up to 16U Medium High Density Residential (RMH)
High Density Residential (RH) 20 DU/AC R-3, R-3, to 20U High Density Residential (RH)
General Commercial (C) Max 1.0 FAR Commercial Planned Development (CPD) Restricted Business Zone (C-1) Commercial Highway Zone (C-H) Commercial Recreation Zone (C-R) Neighborhood Commercial (C-1)
General Commercial (C) Max 1.0 FAR Neighborhood Business Zone (C-2) Community Commercial (C-2)
General Commercial (C) Max 1.0 FAR Unlimited Commercial Zone (C-3) Regional Commercial (C-3)
Office Professional (OP) Max 1.0 FAR Commercial Manufacturing Zone (CM) Office Professional (OP) or Office Business Park (OB) additional uses for Gateway Corporate Center
Light Industrial (1) Max 1.0 FAR Manufacturing-Industrial Planned Zone (MPD) Light Manufacturing Zone (M-1) Restricted Heavy Manufacturing Zone (M-1.5) Light Industry (I)
Open Space Open Space Open Space/Conservation (OS)

(Ord. No. 02(1998), § 2, 11-3-98; Ord. No. 02(2000), 4-4-00; Ord. No. 02(2001), § 1, 11-6-01)

Exceptions & meaning →

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