Westminster Zoning, Planning & Building Codes

Last reviewed: July 25, 2026 · AI-generated overview · General information, not legal advice · detailsless

Compiled with AI research tools from official sources. Verify with the jurisdiction.

Overview

Westminster regulates land use and development through its municipal zoning code, Title 17 Zoning, which maps properties to base districts and applies citywide development standards. The City also uses corridor- and area-focused tools like overlays and the Specific Plan (SP) district, plus a formal design review process for larger projects. State housing mandates (ADUs and SB 9) are implemented directly in the code and prevail over conflicting local rules where required. The official zoning map is part of the code and controls district boundaries and overlay suffixes (§ 17.200.015, § 17.250.010).

ADU/JADU permits are processed ministerially and must be approved or denied within 60 days of a complete application—or they’re deemed approved (§ 17.400.135.D.1, § 17.400.135.D.1.e).

How Westminster’s code is organized

• Title 17 Zoning is structured by Articles. Article 2 (Chs. 17.210–17.250) establishes districts, allowable uses, and zone-specific standards (§ 17.200.020.A). Article 3 provides citywide standards (e.g., setbacks, fences, landscaping, parking, signs) that govern if they conflict with district rules (§ 17.200.020.E; § 17.300.020; Chs. 17.310, 17.320, 17.330).
• Permits and use determinations: Allowed uses are shown as P, AUP, or CUP in Article 2 tables. “P” uses typically need a Zoning Clearance; others require Development Review and/or AUP/CUP (Zoning Clearance Ch. 17.515; Development Review Ch. 17.520; AUP/CUP Ch. 17.550; § 17.200.020.B).
• Map and boundaries: The official Zoning Map is adopted by reference and implements the General Plan; overlay suffixes append to base districts (e.g., C2‑LS‑PD) (§ 17.200.015; § 17.250.010).
• Definitions: Specialized terms (e.g., “accessory dwelling unit,” “multiple-family dwelling”) are collected in Article 7 (§ 17.700.010).
• Citywide prohibitions: Commercial cannabis activities and residential short-term rentals are prohibited (§ 17.200.020.F–G).

Zoning district families

Westminster’s districts (with symbols) implement the General Plan and are shown on the Zoning Map (§ 17.200.010; § 17.200.015):

• Residential districts: R1 (Single-Family), R2 (8–12 du/ac), R3 (13–14 du/ac), R4 (15–18 du/ac), R5 (19–25 du/ac). Zone standards and key numbers live in Table 2‑3 (§ 17.210.015).
• Commercial districts: CR (Restricted), C1 (Local Business), C2 (General Business), CM (Commercial-Industrial). Allowed uses are cataloged in Table 2‑4 (§ 17.220.010).
• Industrial districts: M1 (Light Industrial), M2 (Medium Industrial). Uses and standards are in Table 2‑6 and Table 2‑7 (§ 17.230.010; § 17.230.015).
• Mixed-use districts: MU36 and MU40 with residential caps of 36 and 40 du/ac. Development standards (heights, setbacks, open space, parking) are consolidated in Table 2‑9 (§ 17.260.015).
• Special purpose: P/SP (Public/Semi-Public), P/OS (Parks/Open Space), CEM (Cemetery), PF (Public Facilities), and SP (Specific Plan) (§ 17.200.010; § 17.240.030).
• Overlays (suffixes): CV (Civic Center), LS (Little Saigon), P (Parking), PD (Planned Development), H (Housing). Overlay applicability and precedence are in Ch. 17.250 (§ 17.250.005; § 17.250.010).

For permitted uses and approvals in each district, start with Westminster Zoning and Westminster Land Use.

Citywide development standards

Citywide rules in Article 3 apply in addition to zone standards and override them if there’s a conflict (§ 17.200.020.E). Highlights:

• Setbacks and projections: Citywide setback rules and exceptions (e.g., how to measure to ultimate right-of-way; what can encroach into yards) are in § 17.300.020 and Table 3‑1. For example, a balcony or porch may project 5 ft into a required front yard (no closer than 3 ft to the lot line) and 3 ft into a side yard (no closer than 2 ft) (§ 17.300.020.F, Table 3‑1).
• Fences/walls, landscaping, parking, signage: See § 17.300.030 (fences/walls), Ch. 17.310 (landscaping), Ch. 17.320 (parking), and Ch. 17.330 (signage).
• Commercial/industrial operations: Except where expressly allowed, commercial and industrial activities must occur indoors (§ 17.200.020.C).

Key zone standards at a glance (district chapters control):

• Residential (Table 2‑3) (§ 17.210.015)
  • The R1 district sets a 2-story/35 ft height cap, a typical front setback of the lesser of 50 ft to street centerline or 20 ft to ultimate right-of-way, 5 ft interior side yard (corner street side 10 ft), rear 20 ft or 20% of average lot depth, 40% lot coverage, and parking per Ch. 17.320. Accessory structures are capped at 15 ft to peak (§ 17.210.015; § 17.300.020).
  • Higher-density zones increase allowable density to 1 unit/1,800 sf in R5 (≈24 du/ac), allow rear 10 ft in R5, and adjust height near R1 edges (e.g., in R4, within 100 ft of R1: max 2 stories/25 ft; 100–150 ft: 3 stories/35 ft; otherwise height may not exceed the width of the widest abutting street) (§ 17.210.015).
  • Single-family design rules (e.g., one kitchen unless tied to an ADU approval; larger parking counts for 5+ bedrooms) are in § 17.400.120.
• Industrial (Table 2‑7) (§ 17.230.015)
  • Maximum height 2 stories or 35 ft; minimum lot size 10,000 sf (CM) and 7,200 sf (M2). Typical setbacks include a front yard 50 ft to street centerline, side 0 ft (or 20 ft when abutting residential; 10 ft on public street sides), and rear 10 ft (or 5 ft on an alley; 25 ft abutting residential). Performance standards also limit air emissions, glare/heat, vibration, noise, and odor (§ 17.230.015.A–B).
• Mixed-use (Table 2‑9) (§ 17.260.015)
  • MU36 allows up to 36 du/ac with heights to 5 stories/75 ft for mixed-use buildings; MU40 allows up to 40 du/ac and 6 stories/95 ft. First-story front setbacks are 5–15 ft (MU36) and 7–20 ft (MU40), with an extra 20 ft along Garden Grove Boulevard. Nonresidential FAR is capped at 1.0; minimum residential unit sizes range from 550 sf (studio) to 1,000 sf (3BR). Open space requirements vary by project type (§ 17.260.015).
• Small-lot subdivisions (§ 17.400.150)
  • Infill “small lot” projects must stay within the base-zone density; minimum lot area 3,100 sf (3,400 sf average), 30 ft/2 stories max height (a third level under 500 sf is allowed), front 15 ft to dwelling (20 ft to garage), FAR 0.7, lot coverage 50% + 5% for covered porches/patio covers/balconies, and added on-street guest parking (§ 17.400.150).

For district-specific site limits not listed above (e.g., commercial yard or height metrics), consult the relevant Article 2 tables and development standards. Not found in source materials: a complete summary table of C‑district dimensional standards.

Specific plans & overlays

• Specific Plan district (SP): An SP can replace underlying zoning or function as an overlay; applicable standards are in the adopted plan for the area (§ 17.240.030).
• Planned Development overlay (PD): Applied to larger, integrated sites (≥½ acre). A Comprehensive Plan sets the allowed uses and standards; max building height is tied to the width of the facing street. Utilities must be undergrounded (§ 17.250.030; § 17.560.010).
• Housing overlay (H): On designated Housing Element sites, new residential must meet a minimum 30 du/ac; density bonus may be requested under Gov. Code § 65915 (§ 17.250.035).
• Civic Center (CV) and Little Saigon (LS) overlays: Applied via suffix on the Zoning Map. CV has adopted design guidance in the City’s Design Guidelines Manual (§ 17.250.015). For overlay mechanics and precedence, see overlay districts (§ 17.250.005; § 17.250.010).

Building permits & review

• Approvals pathway: Most “P” uses need a Zoning Clearance; projects often also require Development Review, and some uses need an AUP or CUP (§ 17.200.020.B; Chs. 17.515, 17.520, 17.550). The review authority may impose conditions to ensure conformance (§ 17.520.025; § 17.550.025).
• Design Review Board: Reviews larger residential (≥7 units), larger nonresidential (≥3,000 sf new/additions), certain wireless facilities, and any project referred by an approval authority (§ 17.600.020).
• CEQA and hearings: Non-exempt projects are subject to hearings and Commission action. Development Review applications are noticed/heard as required; multiple entitlements are reviewed concurrently (§ 17.520.015).
• Building permits: After land use approval, building permits are required per the California Building Standards Code; Title 17 also contemplates needed construction permits for permitted uses (§ 17.200.020.B.1). Post-approval procedures (appeals, time limits) follow Article 6 and Ch. 17.510 (§ 17.520.030).
• Citywide prohibitions: Commercial cannabis activities and short-term rentals are not allowed (§ 17.200.020.F–G).

State housing law in Westminster

• ADUs and JADUs (§ 17.400.135)
  • Where allowed: ADUs are permitted on lots with residential uses in residential, mixed-use, and specific plan zones; JADUs are allowed only on single-family lots (§ 17.400.135.C.1–2).
  • Unit counts: Generally, one ADU or one JADU is allowed on a single-family lot and one ADU on a multi-family lot, with additional allowances per subsection N (§ 17.400.135.C.3).
  • Processing: Ministerial approval within 60 days of a complete submittal (or 30 days if using a City preapproved detached ADU plan); applications cannot be denied for unrelated nonconformities and are deemed approved if not acted on in time (§ 17.400.135.D.1–2; § 17.400.135.D.1.e–f).
  • Conflicts: The ADU section prevails over other local provisions, and state law controls where in conflict (§ 17.400.135.A.2). See also California ADU law.
• SB 9 two‑unit housing in R1 (§ 17.400.122)
  • Ministerial approval for up to two primary dwelling units on an R1 lot if state eligibility, anti‑displacement, and historic-resource criteria are met (e.g., no demolition of protected/controlled or recently rented housing; not in designated historic areas) (§ 17.400.122.B.2–4).
• Density bonus: Projects in the H overlay may request a density bonus under Gov. Code § 65915 (§ 17.250.035.B.1.b). See California housing laws for statewide bonus provisions that apply Citywide where eligibility is met.

Source References

• Westminster Zoning Code: §§ 17.200.005; 17.200.010; 17.200.015; 17.200.020
• Residential standards: §§ 17.210.015; 17.300.020; 17.400.120; 17.400.150
• Commercial uses/design guidance: §§ 17.220.010; 17.400.040
• Industrial uses/standards: §§ 17.230.010; 17.230.015; 17.400.110
• Mixed-use standards: § 17.260.015
• Overlays and specific plans: §§ 17.240.030; 17.250.005; 17.250.010; 17.250.015; 17.250.030; 17.250.035; 17.560.010
• Parking/landscaping/signs/fences: Chs. 17.320, 17.310, 17.330; § 17.300.030
• Permitting/design review/CEQA: §§ 17.500.010; 17.515; 17.520.015; 17.520.025; 17.520.030; 17.550.025; 17.600.020
• ADUs/JADUs and SB 9: §§ 17.400.135; 17.400.122