Norco 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

Norco regulates land use through its Municipal Code Title 18, the “Comprehensive Zoning Ordinance,” which implements the General Plan and maps all districts on an adopted [Official Zoning Map] kept by the Planning Department (§ 18.01.02; § 18.03.06). The city’s code reflects Norco’s equestrian identity and rural form; agricultural and single‑family districts allow animal‑keeping at defined intensities, while commercial and industrial standards manage height, setbacks, truck activity and design (§ 18.13.02; § 18.15.06; § 18.24.14). Project review typically runs through site plan and architectural review before a building permit is issued (§ 18.41.08; § 18.41.12). State housing mandates are expressly integrated for ADUs and farmworker housing (§ 18.30.46; § 18.30.49).

The most consequential housing fast‑track in Norco: qualifying ADUs and JADUs are approved ministerially with a building permit and must be acted on within 60 days; if the City does not act, the application is deemed approved (§ 18.30.46(D)(1)–(4)).

How Norco’s code is organized

• Title and purpose. The zoning regulations are adopted as the “Comprehensive Zoning Ordinance of the City of Norco” to implement California’s Planning and Zoning Law (§ 18.01.02).
• Zoning map. Zoning district boundaries and designations are established on the Official Zoning Map on file with the Planning Department (§ 18.03.06).
• Finding your rules. Each district chapter contains use lists and development standards (e.g., R‑1 permitted uses at § 18.15.06; R‑1 heights at § 18.15.18; R‑3 heights at § 18.17.18; C‑O heights at § 18.21.18; C‑G site standards at § 18.29.30).
• Cross‑cutting chapters. Off‑street parking standards live in Chapter 18.38 (e.g., stall sizes, materials at § 18.38.20). Signs are in Chapter 18.37 (cited in zone tables; see § 18.29.30). Fences/walls in setbacks are governed by § 18.31.08 (applied in hillside standards at § 18.26.14(5)).
• Discretionary/design review. Architectural Review runs with and relies on Site Plan Review; approved AR plans control the building permit (§ 18.41.08; § 18.41.12).
• Overlays/specific plans. Overlay zones (including PD Planned Development and P‑E Pedestrian‑Equestrian Trails) are established in § 18.03.02; PDs carry their own development plans and combined processing with subdivision/zone change/CUP (§ 18.27.06; § 18.27.42). HPOZ/specific plan interactions route through the Historic Preservation Commission (§ 18.58.08).

For navigation context and cross‑references, start at Norco Zoning and Norco Development Standards.

Zoning district families

Norco divides land into the following zone families (§ 18.03.02):

• Open space and constrained lands
  • OS Open Space, HS Hillside Development, LD Limited Development
• Agricultural
  • A‑E Agricultural Estate, A‑1 Agricultural Low Density, A‑2 Agricultural
• Residential
  • R‑1 Single‑Family Residential, R‑3 Low‑Density Multifamily Residential
• Commercial
  • C‑G Commercial General, C‑4 Commercial, C‑R Commercial‑Recreation, C‑O Commercial‑Office
• Industrial
  • M‑1 Heavy Commercial/Light Manufacturing, M‑2 General Manufacturing
• Overlays
  • PD Planned Development, P‑E Pedestrian‑Equestrian Trails

Norco’s rural/equestrian policy runs through the agricultural and single‑family districts. The A‑1 chapter declares a purpose to maintain rural character and equestrian uses, and it pairs residential use with defined agricultural and animal‑keeping allowances (§ 18.13.02; § 18.13.06). In the R‑1 district, one single‑family dwelling per lot is the baseline and specific noncommercial animal‑keeping is allowed where minimum lot size and trail adjacency are met (§ 18.15.06).

Citywide development standards

Standards vary by district; below are anchors that recur across Norco’s code, with examples and citations.

Residential yard, height, and animal‑keeping examples

• R‑1 heights. The R‑1 zone caps main buildings at two‑and‑a‑half stories or 35 ft (whichever is less); accessory structures follow Chapter 18.68 (§ 18.15.18).
• R‑3 heights. The R‑3 zone caps at two‑and‑a‑half stories or 35 ft; accessory structures are limited to one story or 15 ft, whichever is less (§ 18.17.18).
• Animal‑keeping (A‑1). Norco assigns “animal units” by lot size. For example, on 20,000–24,999 sq ft lots you may keep 5 animal units, with detailed equivalencies (e.g., one equine = one unit) and minimum setbacks; additional intensity tiers scale upward (§ 18.13.06(D)(4)–(6)).
• R‑1 animal‑keeping allowance. Noncommercial animal‑keeping is permitted in R‑1 on lots of at least 10,000 sq ft that are adjacent to a street with a public horse trail, subject to A‑1 animal‑keeping setbacks (§ 18.15.06(12)).

Hillside development controls (HS)

• Minimum yards. Front: 25 ft from the right‑of‑way; interior sides must sum to 20 ft with at least one side at 12 ft and the other at least 5 ft; street‑side on a corner: 20% of lot width, capped at 15 ft; rear: 30 ft (§ 18.26.14(1)).
• Height and coverage. Max structure height 35 ft; max lot coverage 15% (§ 18.26.14(2)–(3)).
• Grading. Explicit hillside grading criteria limit slope steepness to 2:1 (with tighter allowances by approval), require curvilinear slope design, and mandate transitions to natural slopes (§ 18.26.18(1)–(3)).
• Slope‑based density. Maximum lots per acre range from 1.5 (0–9.9% slopes) down to 0.25 (40%+ slopes) based on an approved slope analysis (§ 18.26.24).
• Hillside district size. New HS districts must be at least 10 acres with average natural slope of at least 12%; the code provides the formula for computing slope (§ 18.26.10).

Commercial and office examples

• C‑G baseline. The C‑G zone’s development table sets:
  • Minimum lot size 13,125 sq ft, lot width 75 ft, lot depth 175 ft; street‑side building setback 25 ft (parking 10 ft); interior side and rear setbacks vary with adjacency, and where abutting a school or any “A” or “R” zone, a 50 ft building setback is required (§ 18.29.30 & Note 1).
  • Maximum building height 35 ft, with a CUP option up to 50 ft (§ 18.29.30 & Note 2).
  • Landscaping, parking/loading, signage, and fences/walls are controlled by cited cross‑chapters (Landscaping § 18.29.80; Parking Ch. 18.38; Signs Ch. 18.37; Walls/Fences § 18.29.50) (§ 18.29.30).
• C‑O heights. The C‑O zone caps height at 2 stories or 35 ft; a CUP may allow up to 50 ft (§ 18.21.18).

Industrial performance and truck standards

• M‑2 performance standards applied by reference. The code authorizes the Planning Commission (or Council on appeal) to apply M‑2 performance standards to other districts through site plan review (e.g., C‑O and certain commercial chapters cite § 18.25.14) (§ 18.21.14; § 18.22.14; § 18.29.40).
• Truck operations (M‑2). Key requirements include use of 2020 CARB‑compliant or newer diesel engines for heavy trucks; no overnighting in cabs; idling limits; a mandatory operations and truck route plan; and a prohibition on off‑site queuing (§ 18.24.14(A)–(C)).

Citywide functional standards

• Off‑street parking geometry and surfacing. Standard stall size is 9 ft × 20 ft; most non‑single‑family parking areas require asphalt or concrete with base, perimeter barriers, and on‑site circulation that avoids re‑entry to the street to reach other aisles; lots with 10+ spaces must devote at least 5% to landscaping; lighting must be shielded and approved (§ 18.38.20(1)–(10)).
• Signs. Zone tables cross‑reference Chapter 18.37 for sign controls (e.g., C‑G cites Ch. 18.37) (§ 18.29.30). See Norco Signage.
• Fences/walls in setbacks. Hillside standards incorporate § 18.31.08 for what may be placed in required yards (§ 18.26.14(5)).
• Water‑efficient landscaping. Projects like farmworker housing must comply with Chapter 18.55 and include specific plant selection, irrigation, and installation/maintenance measures (§ 18.30.49(F)(4)(a)).

Specific plans & overlays

• Planned Development (PD) Overlay. In a PD, only the uses shown on the approved development plan are allowed after findings of General Plan consistency (§ 18.27.06). Where subdivision is involved, processing is combined with the zone change and CUP—streamlining approvals into a single entitlement track (§ 18.27.42).
• Pedestrian‑Equestrian Trails (P‑E) Overlay. The P‑E overlay is established in the district list and reflects Norco’s trail network; consult the Official Zoning Map for applicability (§ 18.03.02; § 18.03.06).
• Historic areas and specific plans. Specific plans or amendments affecting a Historic Preservation Overlay Zone must be reviewed by the Historic Preservation Commission before Planning Commission/City Council action (§ 18.58.08). See Norco Historic Preservation and Norco Overlay Districts.

Building permits & review

• Site Plan + Architectural Review. Architectural Review is processed concurrently with Site Plan Review and uses those procedures; approved AR plans govern the subsequent building permit, and substantial plan changes require resubmittal to the Planning Commission (§ 18.41.08; § 18.41.12). See Norco Design Review.
• ADUs/JADUs. Qualifying ADUs and JADUs are approved ministerially with a building permit, and the City must issue a decision within 60 days of a complete application or the permit is deemed approved. ADU permits follow the California Building Code, and garage demolition to build a detached ADU is processed concurrently (§ 18.30.46(D)(1)–(6)).
• State building code. Building permit plans must comply with the California Building Standards Code as adopted locally (§ 18.30.46(D)(3)).

State housing law in Norco

• Accessory Dwelling Units. Norco’s ADU/JADU standards are expressly crafted to comply with State law while maintaining rural character; the code defines ADUs/JADUs, requires at least 30‑day minimum rental terms, and prohibits separate sale except as allowed by Gov. Code § 65852.26 (§ 18.30.46(A)–(C)). Size limits include up to 1,200 sq ft for detached ADUs and 850/1,000 sq ft for attached studio/1‑bed and 2‑bed units, with special rules for conversions and proportional caps (§ 18.30.46(E)(1)). See Norco ADUs and California ADU law.
• Farmworker housing (Employee Housing Act). Employee housing up to 36 beds in group quarters or 12 units for families/households is treated as an agricultural land use subject to the underlying zone’s development standards and streamlined approvals consistent with the State Employee Housing Act (§ 18.30.49(A)–(E)).
• For additional State mandates (e.g., SB 9 lot splits/duplexes, density bonus), see California housing laws. Not found in source materials: a Norco‑specific implementation chapter for these programs.

Information Gaps

• Parking ratios by use, full sign standards, full fence/wall standards, and the detailed P‑E overlay regulations were not in the source materials; verify with the jurisdiction.
• Local procedures or handbooks for Site Plan Review (Chapter 18.40) and variance/exception processes were not included; see Norco Variances and Exceptions and confirm current practice with Planning.

Source References

• Norco Municipal Code Title 18 — Comprehensive Zoning Ordinance: § 18.01.02; § 18.03.02; § 18.03.06
• Residential and agricultural: § 18.15.06; § 18.15.18; § 18.17.18; § 18.13.02; § 18.13.06
• Hillside development: § 18.26.10; § 18.26.14; § 18.26.18; § 18.26.24
• Commercial/office: § 18.21.18; § 18.29.30
• Industrial performance and trucks: § 18.24.14; cross‑references § 18.21.14; § 18.22.14; § 18.29.40
• Parking geometry/surfacing/landscaping: § 18.38.20
• Signs and fences (as cross‑referenced): Ch. 18.37; § 18.31.08
• Design review: § 18.41.08; § 18.41.10; § 18.41.12
• ADUs/JADUs: § 18.30.46
• Farmworker housing (Employee Housing Act): § 18.30.49
• Historic preservation interface with specific plans: § 18.58.08