Local zoning · Norco

Norco — Zoning

Q: What are Norco setback requirements in the Hillside (HS) zone?

For newly created HS lots the ordinance specifies a 25 ft front yard minimum, interior side yards where one side is ≥ 5 ft and the sum of both sides is ≥ 20 ft (other side at least 12 ft ), corner side yard equal to 20% of lot width but no more than 15 ft , and a 30 ft rear yard. These are in § 18.26.14 .

Q: What does the Animal‑Keeping Overlay (AKO) allow?

An AKO overlay is mapped over R‑1‑10 parcels to allow animal keeping at the levels defined in A‑1 standards; the AKO preserves the underlying zoning while permitting adult animal units by lot‑size categories (the AKO animal unit table and requirements are in § 18.16.50 ). AKO zones are applied by zone change and appear with an AKO suffix on the Official Zoning Map.

Q: How is multi‑family density controlled in R‑3?

The R‑3 zone uses numeric suffixes (e.g., R‑3‑6 , R‑3‑8 ) to identify maximum dwelling units per net acre; the ordinance caps R‑3 at 8 dwelling units per net acre . See § 18.17.04 .

Q: What are the trail (P‑E) overlay rules if my driveway crosses a mapped trail?

The P‑E overlay prohibits impervious driveway materials across the trail in many contexts and prohibits above‑grade structures in the trail corridor; driveway surfacing and encroachments across the P‑E require encroachment permits and City Engineer/Streets, Trails & Utilities Commission approvals per § 18.28.16 and related provisions.

Zoning under the Norco local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

Norco's zoning is codified in the city's zoning ordinance (Title 18 in the copy provided) and divides the city into specific base zones and overlays (for example, R-1, R-3, C-G, OS, HS, AKO, P-E, etc.), with an Official Zoning Map maintained in the Planning Department. The ordinance sets permitted uses, development standards, and procedures for interpretation, amendments, and special overlays; parcel-specific application requires confirming the map designation and reading the relevant zone chapter(s). See the list of base zones in § 18.03.02 and the Official Zoning Map rule in § 18.03.06 for controlling authority.

Note: this page focuses only on what Norco’s local zoning/planning ordinance says about zoning (districts, permitted uses, overlays, and development standards references). For building code, inspection, or housing-law matters see the linked state pages below.

Links you will see used below (first mention of each topic is linked):

How Norco organizes zoning (top-level)

The ordinance explicitly lists all base zones and overlays in § 18.03.02; the Official Zoning Map on file in the Planning Department establishes where each zone applies per § 18.03.06.
If a map boundary is unclear, rules for interpreting the zone boundary are in § 18.03.08 (rules for following street/lot lines, scale use, and appeal to the City Council).

The ordinance’s listed base zones (from § 18.03.02) include (each shown here in bold exactly as the code does): OS, HS, LD, A‑E, A‑1, A‑2, R‑1, R‑3, C‑G, C‑4, C‑R, C‑O, M‑1, M‑2; overlay zones include PD and P‑E.

District-by-district breakdown

Below are Norco-specific summaries drawn from the ordinance. Where the stored extracts gave full standards I cite them; where chapter text was not included in the provided materials I state that the specific numeric standard is Not found in retrieved materials and point to the chapter that governs it.

Note: always verify the zone on the Official Zoning Map and consult the full chapter for exceptions and accessory-use lists before design or permitting. (§ references follow each summary.)

OS — Open Space

Purpose: Preserve open lands, parks, and low‑intensity uses; controls on large signs and freeway‑oriented signage are called out for OS parcels in sign rules. See § 18.03.02 and sign rules referencing OS.
Typical permitted uses: Trails, passive recreation, and other low‑impact uses customary to open space (the ordinance lists OS in the zone table; specific permitted uses are in the OS chapter — Not fully excerpted here). Not found in retrieved materials for a full use list beyond sign criteria.
Key numeric standards: Not found in retrieved materials for full numeric standards; check the OS chapter and the Official Zoning Map. Verify with the jurisdiction.
Where it applies: Parcels indicated as OS on the Official Zoning Map. (§ 18.03.06)

HS — Hillside Development (chapter excerpts available)

Purpose: Manage development in hillside areas to protect natural slope, preserve equestrian/rural character and large-animal keeping. (§ 18.26.10)
Typical permitted uses: Residential and accessory uses compatible with hillside development; specific permitted uses are governed by the HS chapter and related development rules. (§ 18.26.*)
Key dimensional standards (explicit in the ordinance):
- Minimum lot area for newly created HS lots: 20,000 sq ft (§ 18.26.12(1)).
- Front yard setback: 25 ft minimum (§ 18.26.14(1)(a)).
- Interior side yards: one side ≥ 5 ft, and the sum of both sides ≥ 20 ft (with the other side at least 12 ft) (§ 18.26.14(1)(b)).
- Corner side: 20% of lot width but no more than 15 ft (§ 18.26.14(1)(c)).
- Rear yard: 30 ft minimum (§ 18.26.14(1)(d)).
- Max height: 35 ft (§ 18.26.14(2)).
- Max lot coverage: 15% (§ 18.26.14(3)).
Where it applies: Areas meeting the minimum acreage/slope criteria and mapped as HS on the Official Zoning Map; new HS districts must be at least 10 acres and average slope ≥ 12% (§ 18.26.10(1)).

LD — Limited Development

Purpose & uses: Listed in the base zones list; the ordinance places parcels not otherwise designated into LD if unmapped (see § 18.03.08(5)). The specific development standards are in the LD chapter (Not found in retrieved materials).
Key numeric standards: Not found in retrieved materials — confirm in Chapter for LD. Verify with the jurisdiction.

A‑E, A‑1, A‑2 — Agricultural zones

Purpose: Preserve agricultural/estate uses and support low‑density agricultural lifestyles (these zones are enumerated in § 18.03.02). Animal‑keeping rules and animal unit numbers are cross‑referenced to the A‑1 chapter (see AKO and animal‑keeping standards).
Key references: Animal unit rules and numeric animal‑keeping thresholds are established in Chapter 18.13 (A‑1), and the AKO overlay allows A‑1 standards to apply in portions of R‑1-10 when mapped. Specific lot/yard/coverage numbers for the A zones are Not found in retrieved materials.

R‑1 — Single‑family residential

Purpose: Standard single‑family residential district (listed in § 18.03.02). Specific R‑1 development standards (setbacks, lot sizes by R‑1 subtypes if any) are in the R‑1 chapter — Not found in retrieved materials. Verify with the jurisdiction.

R‑3 — Low‑density multiple‑family residential (chapter excerpts available)

Purpose: Provide for low‑density multi‑family compatible with Norco’s rural character. (§ 18.17.02)
Typical permitted uses: Multiple‑family dwelling units, public parks/playgrounds, and accessory buildings/uses such as garages and resident amenities (§ 18.17.06).
Key standards:
- R‑3 is subdivided by numeric suffix (e.g., R‑3‑6, R‑3‑8) to indicate maximum dwelling units per net acre; maximum allowed by code is 8 du/acre (§ 18.17.04).
- Additional development standards (setbacks, parking ratios, lot coverage) are in the R‑3 chapter — Not fully excerpted here; verify with the chapter and the Norco Development Standards.

C‑G, C‑4, C‑R, C‑O — Commercial zones

Purpose: Support commercial, office, recreation, and general commerce uses (C‑G = Commercial General, etc.) as listed in § 18.03.02.
Typical permitted uses: The code enumerates permitted and conditional commercial uses in the commercial zone chapters; for some specific planned areas, the Specific Plan or chapter 18.63 (HD) defers to specific‑plan standards. See the Specific Plan and C‑G chapter references (e.g., Chapter 18.29 for C‑G is referenced by other chapters).
Key numeric standards: Not found in retrieved materials for the general C‑G / C‑O / C‑4 numeric table. Verify in the commercial zone chapters and Norco Parking for parking ratios.

M‑1, M‑2 — Industrial / light manufacturing

Purpose: Industrial and manufacturing uses allowed per the ordinance list. Specific permitted uses and standards are in the M‑zone chapters (Not found in retrieved materials).

PD — Planned Development (Overlay)

Purpose: PD is an overlay for site‑specific planned development standards; when applied it supersedes base standards where specified. Details and procedures are in the PD chapter and in the Specific Plan chapter 18.52 (Not fully excerpted here). Not found in retrieved materials for a numeric summary.

P‑E — Pedestrian‑Equestrian Trail Overlay (detailed)

Purpose: A narrow overlay (up to 12 ft wide) over certain easements and rights‑of‑way to preserve pedestrian and equestrian trails. See § 18.28.04 and following.
Permitted uses: Pedestrian and equestrian traffic and other human- or equestrian-propelled devices only (§ 18.28.06).
Limitations: Motorized vehicles prohibited except for driveway access or maintenance; no above‑grade structures allowed other than fencing and maintenance facilities (§ 18.28.08).
Construction/standards: Trails to be built to City Trail Standards (Norco Standard Drawing No. 700) and surfaced with decomposed granite unless otherwise approved (§ 18.28.10).

AKO — Animal‑Keeping Overlay (detailed)

Purpose: Applied to portions of R‑1‑10 to permit expanded animal‑keeping consistent with A‑1 standards while preserving the underlying zoning; the overlay is additive and does not change base uses except to allow animal‑keeping per A‑1 rules where applied (§ 18.16.10).
Permitted uses: Underlying R‑1‑10 uses remain; animal‑keeping levels are those allowed in Chapter 18.13 (A‑1) when the AKO is applied (§ 18.16.30).
Key numeric animal standards (AKO chapter):
- Maximum adult animal units scale with lot size (table in § 18.16.50(1)); e.g., lot 10,001–12,500 sq ft = 1 unit, 12,501–15,000 = 2 units, etc. (§ 18.16.50(1)).
- Minimum 500 sq ft of flat usable area per adult animal unit and minimum setbacks (e.g., animals must be at least 35 ft from adjacent residences unless a six‑foot solid fence separates the area) (§ 18.16.50 and related).
Establishment: AKO must be applied through a zone change and will appear on the map with the AKO suffix and a sequential number (e.g., R‑1‑10 (AKO‑1)) (§ 18.16.20, § 18.16.60).

HDO / HD — Housing Development Overlay (HDO)

Purpose: To facilitate affordable housing consistent with state law and the City housing element on mapped parcels; development under HDO requires a site plan and may use modified standards to encourage affordable housing (§ 18.64.02).
Applicability: Applies only on parcels shown on the Official Zoning Map as HDO and requires an HDO site plan before approvals; the HDO chapter explicitly ties to Government Code affordable housing provisions. (§ 18.64.02, § 18.63.12)

Quick reference table — decision‑relevant standards

District / Standard	Most decision‑relevant rule or permitted use	Code Reference
Zones established – full list	City base zones: OS, HS, LD, A‑E, A‑1, A‑2, R‑1, R‑3, C‑G, C‑4, C‑R, C‑O, M‑1, M‑2; overlays PD, P‑E	§ 18.03.02
Official Zoning Map	Map on file in Planning Dept. is part of ordinance; unmapped property deemed LD until reclassified (§ 18.03.06 & § 18.03.08(5))	§ 18.03.06, § 18.03.08
HS — Hillside minimum lot & setbacks	Min lot area 20,000 sq ft; front yard 25 ft; rear 30 ft; height 35 ft; lot coverage 15%	§ 18.26.12, § 18.26.14
R‑3 — Density cap	R‑3 subzones use suffix (e.g., R‑3‑6, R‑3‑8); max 8 du/acre per code	§ 18.17.04
P‑E — Trail overlay limits	12 ft width overlay (max); only pedestrian/equestrian uses; no above‑grade structures except fences/maintenance	§ 18.28.04–10
AKO — Animal unit table & rules	Animal units tied to lot size (table in § 18.16.50(1)); additional standards (500 sq ft per animal unit, 35 ft from adjacent residence unless fenced)	§ 18.16.50, Chapter 18.13

Practical guidance / synthesis

Start by confirming the parcel’s official map designation in the Planning Department (Official Zoning Map is part of the ordinance: § 18.03.06) and, if boundaries are unclear, use the boundary interpretation rules in § 18.03.08.
If your site is in an overlay (for example P‑E or AKO), the overlay’s additional rules apply in addition to the underlying base zone and can add special conditions (AKO allows A‑1 animal standards to apply in R‑1 parcels, see § 18.16.10 and § 18.16.30).
For projects invoking greater density or affordable housing incentives, consult the Housing Development Overlay (HDO) and the Density Bonus chapter (Chapter 18.65) which implements state density bonus law; these can modify development standards and parking requirements (see the ordinance’s density bonus provisions tied to State Government Code).
Review Norco Development Standards and site‑specific chapters (e.g., HS, R‑3) early — setbacks, lot coverage, height, and animal‑keeping rules are often decisive and sometimes recorded against the parcel (e.g., animal unit recordation required during subdivision in the HS zone, § 18.26.12(4)).
Account for parking and access early — the ordinance cross‑references parking and access rules, and some uses (child care, large family day care, commercial uses with animals) have explicit off‑street parking and loading requirements; see the Norco Parking page and the child care/large family day care rules in the ordinance (e.g., child care requirements in § 18.30.10 (development standards)).

Checklist

Confirm parcel zoning on the Official Zoning Map and read the mapped base zone chapter (§ 18.03.06).
If the map boundary is fuzzy, request an interpretation per § 18.03.08.
Identify overlays affecting the parcel (e.g., AKO, P‑E, HDO) and pull those chapter standards (§ 18.16, § 18.28, § 18.64).
Confirm permitted uses vs. conditional uses in the base zone chapter and whether a Conditional Use Permit, Site Plan Review, or Specific Plan is required (see chapter headings and Chapter 18.45 for CUPs).
Check development standards (setbacks, height, lot coverage) in the relevant chapter (e.g., HS standards in § 18.26.14).
For animal‑keeping or large family day care, follow the specific permit standards and notice rules in the ordinance (see large family day care permit rules and AKO standards).
Confirm parking and loading requirements and any design review obligations; coordinate with Public Works for trail overlay encroachments. See Norco Parking and Norco Design Review.

Risks & Ambiguities

Issue	Why it matters	What to verify
Ambiguous map boundary	Could change applicable standards or allowed uses	Use § 18.03.08 boundary rules and get a formal map interpretation from the Planning Dept.
Overlay interactions (AKO, P‑E, PD, HDO)	Overlay conditions add or limit uses (animal keeping, trail protections, affordable housing incentives)	Confirm which overlays are mapped on the parcel and read overlay chapters (e.g., § 18.16 for AKO, § 18.28 for P‑E).
Nonconforming uses/structures	Existing uses or buildings may be grandfathered but restricted for alterations	Review Chapter 18.39 on Nonconforming Uses (Not fully excerpted here — verify with the Planning Dept.).
Animal‑keeping quantity vs. parcel size	Animal units are strictly tied to lot size in AKO and A‑1 rules; miscalculation risks code violation	Use the AKO table § 18.16.50(1) and A‑1 Chapter 18.13 rules; recordation may be required at subdivision.
Use not listed in a zone	The ordinance requires a similar‑use determination or Planning Commission resolution — process adds time and uncertainty	Consider the Similar Uses procedure in Chapter 18.42; expect public notice/hearing.
Short‑term rentals	Prohibited citywide — attempting STR use will be rejected	Short‑term rentals are prohibited in all zoning districts per § 18.69.02.

Plain‑English Summary

Norco’s zoning ordinance divides the city into named base zones (like R‑1, R‑3, C‑G, HS, OS) and overlays (for example AKO, P‑E, HDO). Each zone chapter and the Official Zoning Map control what you can build or keep (animals, housing density, trail buffers, etc.); check the map, the base zone chapter, and any overlay chapters that affect your parcel before investing time or money. (§ 18.03.02, § 18.03.06)

Source References

Zones established and Official Zoning Map: § 18.03.02, § 18.03.06.
Interpretation of zone boundaries and unmapped parcels: § 18.03.08.
Hillside (HS) lot, yard, height, coverage standards: § 18.26.12, § 18.26.14.
Animal‑Keeping Overlay (AKO) and animal unit table/standards: Chapter 18.16, § 18.16.50.
Pedestrian‑Equestrian (P‑E) overlay: Chapter 18.28, § 18.28.04–16 (trail standards & construction).
R‑3 zone purpose, sub‑zones and density caps: § 18.17.02, § 18.17.04, § 18.17.06.
Housing Development Overlay (HDO) and Specific Plan cross‑references: Chapter 18.64 (and related Chapter 18.63/18.52).
Large family day care and child care facility development standards: § 18.30.10 and related subsections.
Similar uses procedure: Chapter 18.42.
Short‑term rentals prohibition: § 18.69.02.

(These citations point to the Norco zoning ordinance material retrieved for this summary. For parcel‑level decisions, read the full chapters cited and consult Planning staff.)

Sources

Retrieved passages

Norco Zoning Code (Chapter 18.03.) High relevance
Norco Zoning Code (§ 18.03.06.) High relevance
CBC § 18.65.02 (Chapter 18.65.) High relevance
Norco Zoning Code (§ 18.63.06.) High relevance
CBC § 100 High relevance
CBC § 18.65.04 (§ 18.65.04.) High relevance
Norco Zoning Code (§ 18.30.08.) High relevance
CBC § 18.26.10 (§ 18.26.10.) Medium relevance

Cited sections

Official Norco code library

Frequently asked questions

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

R‑1 is the city's single‑family residential district; permitted uses are the single‑family dwelling and accessory uses identified in the R‑1 chapter. Specific dimensional standards (setbacks, lot area, coverage) are in the R‑1 chapter of the ordinance — confirm the parcel’s R‑1 subtype and read that chapter. Verify on the Official Zoning Map per § 18.03.06.

What are Norco setback requirements in the Hillside (HS) zone?

For newly created HS lots the ordinance specifies a 25 ft front yard minimum, interior side yards where one side is ≥ 5 ft and the sum of both sides is ≥ 20 ft (other side at least 12 ft), corner side yard equal to 20% of lot width but no more than 15 ft, and a 30 ft rear yard. These are in § 18.26.14.

Do I need design review in Norco?

Design review requirements are in the ordinance’s architectural/design review chapters and administered under the design review rules; many commercial and some residential projects are subject to design review. Always check the specific zone chapter and the Norco Design Review page and the relevant chapter (e.g., architectural review provisions referenced in Chapter 18.41 and related sections). Not found in retrieved materials for a single blanket rule — verify with the Planning Dept.

What does the Animal‑Keeping Overlay (AKO) allow?

An AKO overlay is mapped over R‑1‑10 parcels to allow animal keeping at the levels defined in A‑1 standards; the AKO preserves the underlying zoning while permitting adult animal units by lot‑size categories (the AKO animal unit table and requirements are in § 18.16.50). AKO zones are applied by zone change and appear with an AKO suffix on the Official Zoning Map.

How does the Official Zoning Map control my property?

The Official Zoning Map is part of the ordinance and legally assigns zone designations and boundaries; the map is maintained in the Planning Department. If map boundaries appear ambiguous, apply the boundary interpretation rules in § 18.03.08.

Are short‑term rentals allowed in Norco?

No. Short‑term rentals are explicitly prohibited in all zoning districts under § 18.69.02. Attempting to use a property as a short‑term rental would conflict with the zoning ordinance.

How is multi‑family density controlled in R‑3?

The R‑3 zone uses numeric suffixes (e.g., R‑3‑6, R‑3‑8) to identify maximum dwelling units per net acre; the ordinance caps R‑3 at 8 dwelling units per net acre. See § 18.17.04.

If my proposed use isn't listed, can I still do it?

Possibly. The ordinance allows the Planning Commission to find that an unlisted use is a “similar use” after a staff study and a public hearing following the Similar Uses procedure in Chapter 18.42. Expect notice and a resolution of record.

What are the trail (P‑E) overlay rules if my driveway crosses a mapped trail?

The P‑E overlay prohibits impervious driveway materials across the trail in many contexts and prohibits above‑grade structures in the trail corridor; driveway surfacing and encroachments across the P‑E require encroachment permits and City Engineer/Streets, Trails & Utilities Commission approvals per § 18.28.16 and related provisions.

Where do I find parking requirements in the code?

Parking ratios and access standards are located in the ordinance and cross‑referenced to zone chapters; child care and other specific uses have explicit parking formulas in the development standards (see child care standards and the Norco Parking page). For project planning, pull the parking table and the applicable zone chapter.

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