Corona — Overlay Districts

Last reviewed: July 1, 2026

Overview

Overlay districts in Corona are additional zoning layers that modify or supplement the rules of an underlying base zone for specific places or policy goals. The City codifies these in Chapter 17.62 — Overlay Zones and in one stand‑alone overlay chapter for affordable housing (Chapter 17.31); each overlay states its purpose, where it applies, permitted/conditional/prohibited uses, and the overlay's development standards and precedence over the underlying zone. See the city's zoning menu for context on how overlays interact with base zones on the Official Zoning Map.

Below is a Corona‑specific, ordinance‑grounded breakdown of the active overlay districts (what they are intended for, typical allowed uses, key numeric/development rules, and where they apply).

How overlays work in Corona (general rule)

• An overlay's rules are “supplementary to” the underlying zone; when an overlay conflicts with the underlying zone, the overlay provision controls. This rule is explicit in multiple overlay sections (for example, § 17.62.330, § 17.62.610, § 17.62.710, and § 17.62.860).
• Overlays are shown on the Official Zoning Map by adding the overlay abbreviation to the underlying zone symbol (for example “MR” or “AHO” following the base zone). See the designation procedure in § 17.62.370 and § 17.31.030.

District-by-district breakdown

Note: each subsection below cites the controlling Corona Municipal Code § for the provision described. If the uploaded materials did not include the full text of a subsection, that is flagged as "Not found in retrieved materials."

• When you see references to development rules (setbacks, height, lot coverage, parking), cross‑check with Corona's Development Standards and Parking pages as the overlays frequently point back to base zone chapters for standards. Also see the city's standards for design review when an overlay invokes design or streetscape controls via Design Review.

Open Space Overlay (OS)

• Purpose: Preserve open space for recreation, scenic corridors and natural features. § 17.62.010.
• Permitted uses: groundwater basin management areas, bodies of water, golf courses, scenic view corridors, and single‑family dwelling (one per lot) plus accessory buildings. § 17.62.020.
• Key standards: OS relies on the general property development standards and the underlying base zone for technical standards; the chapter establishes the overlay's purpose and permitted uses rather than an exhaustive numeric table. § 17.62.010–020.
• Where it applies: Designated parcels shown as OS on the Official Zoning Map. Verify parcel designation with Planning. § 17.62.010–020.

Agricultural Preserve / Agricultural Overlay (AP)

• Purpose: Preserve agricultural character and allow rural‑style improvements while complying with Title 17 generally. § 17.62.410.
• Typical permitted uses: plant nurseries, fruit stands, plant production; accessory agricultural uses; secondary residential units/ADUs are expressly referenced as allowable in overlays (check ADU chapter). § 17.62.410; § 17.62.510 (improvements); § 17.62.450–460.
  • When you plan an ADU, follow the ADU rules (ministerial plan check) in Chapter 17.85 and Corona ADU guidance. See ADUs.
• Key dimensional/operational standards:
  • Maximum lot coverage 30% for AP zone properties subject to the chapter. § 17.62.470.
  • Plant nursery and fruit stand display limitations: up to 20% or 50% of sales area for accessory products (see § 17.62.450–460).
  • Signs: parcel identification sign max 32 sq ft; enterprise ID up to 50 sq ft; monument style limits and non‑illuminated parcel sign rules. § 17.62.530. See Signage.
  • Landscaping/parking: AP defers to the City’s parking and landscaping chapters (Chapters referenced in §§ 17.62.480–500). See Parking and Landscaping and Screening.
• Where it applies: Specific parcels designated AP on Official Zoning Map; development must also comply with Title 17. § 17.62.410; § 17.62.440.

Mineral Resource Overlay (MR)

• Purpose: Protect identified mineral resource areas and allow surface mining where consistent with General Plan Conservation Element. § 17.62.320–330.
• Establishment procedure and criteria: adding MR to the Official Zoning Map requires findings that the site is identified in the General Plan mineral map, compatible GP designation and underlying M‑2, M‑3, or A zoning (or equivalent Specific Plan). § 17.62.370–380.
• Permitted uses:
  • Surface mining operations with an approved surface mining permit and reclamation plan (Chapter 19.08). § 17.62.340–350.
  • Uses incidental to mining (temporary uses tied to mining operations) may be allowed subject to director findings. § 17.62.350–360.
• Prohibited uses: the MR overlay specifically prohibits all commercial cannabis activities on MR lands (a list appears in § 17.62.365). § 17.62.365.
• Disestablishment: an MR overlay can be removed only with studies proving mineral deposits no longer exist or are no longer economically viable. § 17.62.390.
• Where it applies: lands designated MR on the Official Zoning Map; overlay controls prevail over base zone per § 17.62.330.

Garretson Avenue Overlay (GA)

• Purpose: Preserve neighborhood character along a defined stretch of Garretson Avenue and provide neighborhood improvements. § 17.62.600.
• Applicability: parcels abutting Garretson Avenue between Chase Drive and Foothill Parkway. § 17.62.610.
• Key standards:
  • Minimum total floor area per dwelling unit: 4,500 sq ft (this unusually large minimum is intended to preserve lot/house scale). § 17.62.620.
  • Street tree requirement: plant and maintain 48‑inch box trees in the parkway at time of improvements for unimproved parcels. § 17.62.630.
• Where it applies: GA‑designated parcels on the Official Zoning Map. § 17.62.610–630.

Sherborn Street Overlay (SS)

• Purpose: Encourage industrial development appropriate to Sherborn Street's unique role. § 17.62.700.
• Applicability and relationship to base zone: SS adopts the M‑3 (Heavy Manufacturing) development standards in Chapter 17.44 as the baseline and states that where conflict occurs the SS overlay prevails. § 17.62.710.
• Permitted/Conditional/Prohibited uses:
  • Permitted uses follow § 17.44.030 for M‑3 unless specifically limited in SS. § 17.62.720.
  • Conditional uses added by SS include recycling, auto salvage, and RV storage (CUP required). § 17.62.730.
  • Prohibited in SS: restaurants, commercial recreation/drive‑ins, churches, batch plants and rock crushers/distribution of rocks, sand and gravel. § 17.62.740.
• Key standards:
  • No minimum lot area, lot width, or lot depth requirement (explicit). § 17.62.750(A).
  • Front yard setback: 10 feet unless otherwise provided. § 17.62.750(B).
  • Outdoor storage must comply with § 17.44.090 and be screened from streets/neighbors; RV storage allowed by CUP. § 17.62.760.
• Where it applies: parcels identified SS on the Official Zoning Map. § 17.62.710–760.

Animal/Agricultural Assistance Overlay (AA) — (AA overlay)

• Purpose and intent: AA overlay provisions permit certain animal‑keeping and agricultural uses that differ from the underlying zone while preserving rural/agricultural character. See Chapter subsections. § 17.62.810 et seq.
• Permitted/Conditional/Prohibited uses:
  • Permitted uses include those allowed in underlying zones; conditional uses include dog kennels, catteries when thresholds met; prohibited uses are the uses already prohibited in the underlying zone. § 17.62.820–830.
• Key standards:
  • Minimum lot area for animals/fowl (other than household pets): 20,000 sq ft to allow those animal uses. § 17.62.840.
  • Height limits: single‑family residences not to exceed 40 ft; all other structures 50 ft. § 17.62.850.
  • Development standards default to the underlying zone unless AA provides otherwise; AA prevails on conflict. § 17.62.860.
• Where it applies: parcels identified AA on the Official Zoning Map. § 17.62.810–860.

Affordable Housing Overlay (AHO / Chapter 17.31)

• Purpose: The Affordable Housing (AH) Overlay Zone is intended to designate properties suitable for higher density residential uses and to incentivize affordable housing development while ensuring compatibility through standards in the chapter. § 17.31.010.
• Definitions and designation: Chapter 17.31.020 defines terms (affordable unit, housing development project, mixed use); designation is by adding AHO to the underlying zone on the Official Zone Map. § 17.31.020–030.
• Permitted uses: the chapter contains a § 17.31.040 header for permitted uses, but the full permitted‑use text for § 17.31.040 was Not found in retrieved materials. Verify permitted/conditional uses with the Planning Division and read § 17.31.040 directly.

Quick reference table — most decision‑relevant items

Checklist (what an applicant must satisfy when proposing work in an overlay)

• Confirm overlay designation on the Official Zoning Map (is the parcel tagged MR, AP, GA, SS, AA, or AHO?). Verify with Planning. § 17.62.370; § 17.31.030.
• Demonstrate the proposed use is permitted in that overlay (permitted vs. conditional vs. prohibited). See the specific overlay §§ cited above.
• If a conditional use is required (e.g., SS CUP for RV storage, AA kennels), prepare findings and follow the CUP procedures in Chapter 17.92. § 17.62.730; Chapter 17.92.
• Meet overlay numeric standards (e.g., AP lot coverage 30%, GA min floor area 4,500 sf, SS front setback 10 ft, AA minimum lot 20,000 sf). § 17.62.470; § 17.62.620; § 17.62.750; § 17.62.840.
• Provide required landscaping, screening and parking per overlay references to Chapters 17.70, 17.76 and the City’s development standards. See Landscaping and Screening and Parking.
• If the project includes an ADU, follow Chapter 17.85 ADU rules and the state ADU law; ADUs are processed ministerially. See ADUs and California ADU law. § 17.85.060–070.
• Anticipate design or streetscape requirements (e.g., GA street trees, AP rural design guidelines) and consult the City's Design Review requirements. § 17.62.520; § 17.62.630.

Risks & Ambiguities

Plain-English Summary

If your parcel is in one of Corona’s overlays (for example MR, AP, GA, SS, AA, or AHO), the overlay adds or changes what you can build there — it can allow special uses (like mining or RV storage), add special numeric rules (like a 4,500 sq ft minimum floor area on Garretson Ave § 17.62.620), or forbid certain uses outright (MR prohibits commercial cannabis § 17.62.365). Always confirm the overlay on the Official Zoning Map and read the overlay’s specific §§ because overlay rules override the underlying zone where they conflict.

Source References

• Corona Municipal Code — Chapter 17.62, “Overlay Zones” (multiple overlay sections referenced above, including § 17.62.010 – § 17.62.760).
• Corona Municipal Code — Chapter 17.31, “Affordable Housing Overlay Zone” (§ 17.31.010 – § 17.31.040).
• MR overlay establishment and criteria: § 17.62.370 – § 17.62.390.
• SS/Sherborn Overlay (permitted/conditional/prohibited uses and development standards): § 17.62.700 – § 17.62.760.
• AP (Agricultural/Preserve) design, signs, parking and coverage rules: § 17.62.410 – § 17.62.530.
• AA overlay (animal/agriculture assistance) standards: § 17.62.810 – § 17.62.860.
• Official Zoning and zone boundary rules: § 17.02.030 – § 17.02.060.

Also consult these Corona topic pages used in the guidance above:

• Corona Zoning
• Corona Development Standards
• Corona Parking
• Corona Design Review
• Corona Signage
• Corona ADUs
• California Building Standards Code (for building code / Title 24 issues — note overlays are zoning; you will still need building permits that comply with Title 24 when constructing).

Retrieved passages

• Corona Zoning Code (chapter and) High relevance show source text
• Corona Zoning Code (Section IV-b) High relevance show source text
• Corona Zoning Code (Chapter 17.44) High relevance show source text
• Corona Zoning Code (§ 17.62.350.) High relevance show source text
• Corona Zoning Code (section means) High relevance show source text
• Corona Zoning Code (Chapter 17.85) Medium relevance show source text
• Corona Zoning Code (section and) Medium relevance show source text
• Corona Zoning Code (§ 17.26.060) Medium relevance show source text

Cited sections

• Corona Municipal Code — Chapter **17.62**, “Overlay Zones” (multiple overlay sections referenced above, including **§ 17.62.010 – § 17.62.760**). (§ 17.62.010)
• Corona Municipal Code — Chapter **17.31**, “Affordable Housing Overlay Zone” (**§ 17.31.010 – § 17.31.040**). (§ 17.31.010)
• MR overlay establishment and criteria: **§ 17.62.370 – § 17.62.390**. (§ 17.62.370)
• SS/Sherborn Overlay (permitted/conditional/prohibited uses and development standards): **§ 17.62.700 – § 17.62.760**. (§ 17.62.700)
• AP (Agricultural/Preserve) design, signs, parking and coverage rules: **§ 17.62.410 – § 17.62.530**. (§ 17.62.410)
• AA overlay (animal/agriculture assistance) standards: **§ 17.62.810 – § 17.62.860**. (§ 17.62.810)
• Official Zoning and zone boundary rules: **§ 17.02.030 – § 17.02.060**. (§ 17.02.030)
• Corona Zoning
• Corona Development Standards
• Corona Parking
• Corona Design Review
• Corona Signage
• Corona ADUs
• California Building Standards Code (for building code / Title 24 issues — note overlays are zoning; you will still need building permits that comply with Title 24 when constructing). (Title 24)
• Corona_ZoningCode.md

• Official Corona code library