Yorba Linda — Overlay Districts

Last reviewed: July 3, 2026

Overview

Yorba Linda’s zoning code organizes overlays into two related categories: the housing overlay zones in Chapter 18.17 (the AHO, CLO, MUO) and the combining/overlay or “combining” zones in Chapter 18.18 ((SH, H, O, TC, I)). Overlay districts modify or add standards to the underlying zone; they are applied to specific properties by City Council ordinance and are shown on the official zoning map. See the City’s Yorba Linda Zoning map for parcel-level application.

How overlays work (core rules)

• Overlay districts in Chapter 18.17 are identified with a suffix after the underlying zone and may be used in place of, or in addition to, the underlying zone standards; applicants must state which standards they are using. See § 18.17.030.
• All housing overlays require deed-restricted affordable units and specific affordability percentages and durations. See § 18.17.050.
• Where an overlay or combining zone conflicts with the underlying standards, the overlay/combining requirements apply. See § 18.18.110 (historic combining) and the general overlay applicability rules.

Note: project-level development standards (setbacks, lot coverage, building height) generally default to the underlying zone unless the overlay gives a specific rule; consult the City’s Yorba Linda Development Standards and Table 18.10-02 for baseline residential standards.

District-by-district breakdown

Affordable Housing Overlay (AHO)

• Purpose: Facilitate lower-cost and smaller-lot housing and expand sites for multifamily/condominium housing. See § 18.17.100.
• Typical permitted uses: Uses of the underlying zone apply; an applicant must follow the underlying zone’s use table unless the overlay specifically allows otherwise. See § 18.17.110.
• Key dimensional & program standards:
  • Density: 20–35 units per acre (minimum 20, maximum 35) — § 18.17.120.
  • Height: 3 stories, 40 feet maximum — § 18.17.130.
  • Parking: Governed by the underlying zone's parking table; see § 18.17.140 referencing Section 18.22.030(B). For parking details see the City's Yorba Linda Parking rules.
  • Affordability: Deed-restricted units required: at least 20% of rentals to very-low/low income for 55 years; 20% of ownership units to low/moderate for 45 years — § 18.17.050.
• Where it applies: Only where City Council has adopted the overlay and the zoning map shows the suffix; applicants may choose AHO or the underlying zone standards at submittal — § 18.17.030.

Congregational Lands Overlay (CLO)

• Purpose: Promote affordable housing paired with religious institutions (implements AB 1851 policy goals) — § 18.17.200.
• Typical permitted uses: Multiple-family dwellings and condominiums allowed in addition to underlying uses, only when in conjunction with a church/temple/religious institution holding a valid conditional use permit — § 18.17.210.
• Key dimensional & program standards:
  • Site definition & density: Applicant must define the portion of the site for residential use; density 20–35 units/acre within that portion — § 18.17.220.
  • Height: 3 stories, 40 feet — § 18.17.240.
  • Parking: Affordable units provide one covered or uncovered space per qualifying affordable dwelling (Government Code 65913.6 cap rules apply); market-rate units follow RM-20 standards in Chapter 18.22; residential spaces may be shared with the religious institution — § 18.17.250.
  • Adaptive reuse: Conversion of existing nonresidential structures to housing is permitted under specified conditions and without triggering additional setbacks/open-space reductions — § 18.17.260.
  • Transfer of development rights rules are present for CLO properties (time-limited program references in code) — § 18.17.270.
• Where it applies: Applied by ordinance; zoning map shows suffix. Verify whether a particular church parcel currently has CLO overlay. See § 18.17.030.

Mixed‑Use Overlay (MUO)

• Purpose: Encourage housing above/alongside community-serving retail to increase affordable housing and reduce vehicle trips — § 18.17.300.
• Typical permitted uses & configuration:
  • Residential (multifamily/condominiums) allowed only where the same site contains at least 10,000 sq ft of commercial retail/service space that meets the underlying zone standards. At least 50% of building square footage on the MUO property must be residential. Vertical and horizontal mixed-use layouts are explicitly permitted — § 18.17.310.
• Key dimensional & program standards:
  • Density: 20–35 units per acre — § 18.17.320.
  • Height: Up to 4 stories, 50 feet maximum. Projects with a fourth story must locate all fourth-story elements at least 70 feet from any public street and 100 feet from single‑family zones; fourth-story elements’ linear dimension is limited to 200 feet — § 18.17.330.
  • Parking: Residential parking uses R‑M‑30 standards (Section 18.22.030(B)); nonresidential parking may be reduced up to 35% by the Planning Commission via design review if supported by a parking study — § 18.17.340. See the City’s Yorba Linda Parking guidance.
• Where it applies: Only where shown on the zoning map by Council ordinance — see § 18.17.030.

Combining zones (Chapter 18.18) — summary

• The code establishes several combining/overlay types: (SH) Special Housing, (H) Historic, (O) Oil Production, (TC) Town Center, and (I) Imperial Highway — § 18.18.010. Specific rules vary by combining zone.
• Historic (H) Combining Zone: Purpose, designation procedures and criteria are specified; the (H) combining zone is applied by ordinance and the overlay rules control where in conflict with underlying zones — §§ 18.18.100–130. For preservation/changes, consult the City’s Yorba Linda Historic Preservation page.
• Special Housing (SH) Combining Zone: Designed to enable special housing types (e.g., senior housing); the code includes specific development standards (Table 18.18‑1) and eligibility tied to State rules — §§ 18.18.020–060.
• For the other combining zones ((O), (TC), (I)) the code lists them as established but detailed development rules for each were not found in the retrieved materials. Not found in retrieved materials — Verify with the jurisdiction.

Quick reference table — most decision‑relevant overlay rules

Checklist

Applicants using a Yorba Linda overlay must address the following before filing:

• Identify whether the parcel carries an overlay/combing suffix on the official zoning map (verify with Planning) — § 18.17.030.
• State clearly on the entitlement application whether you are using the overlay standards or the underlying zone standards — § 18.17.030.
• For housing overlays, prepare an affordability plan and draft deed restrictions consistent with § 18.17.050 and Chapter 18.19 (density bonus/incentives) — § 18.17.050.
• Demonstrate compliance with overlay density/height standards (e.g., 20–35 u/ac, 40–50 ft caps) — see the applicable overlay (§§ 18.17.120, 18.17.220, 18.17.320, 18.17.130, 18.17.240, 18.17.330).
• Provide a parking strategy consistent with overlay rules (refer to § 18.17.140, § 18.17.250, § 18.17.340 and Chapter 18.22); include a parking study if requesting reductions — see Yorba Linda Parking.
• If the overlay triggers design review, prepare materials to the standards in Chapter 18.26 and consult the Yorba Linda Design Review process.
• If the parcel is in the historic combining zone, show how the proposal meets compatibility and historic‑resource rules in § 18.18.120 et seq. and consult the Yorba Linda Historic Preservation guidance.

Risks & Ambiguities

Plain‑English summary

If your Yorba Linda property has an overlay suffix, the overlay adds or replaces certain zoning rules (density, height, parking, affordability) for that parcel — for housing overlays expect 20–35 units/acre, specific height caps (typically 40–50 ft), and mandatory deed‑restricted affordable units; confirm the overlay on the zoning map and which rule set you will use when you apply. Verify parcel‑level application with the City.

Information Gaps

• Parcel‑level overlay mapping (which parcels currently carry AHO, CLO, MUO) — Not found in retrieved materials. Verify with Planning.
• Detailed provisions for combining zones (O) Oil Production, (I) Imperial Highway, and (TC) Town Center beyond their establishment — Not found in retrieved materials. Verify with the jurisdiction.
• Fee schedules, submittal checklists and precise application forms referenced in practice — Not found in retrieved materials. Verify with City staff.

Source References

• Title 18 — Yorba Linda Zoning Code, Chapter 18.17 (Overlay Zones): § 18.17.010, § 18.17.020, § 18.17.030, § 18.17.040, § 18.17.050, § 18.17.060.
• Article 1 — Affordable Housing Overlay (AHO): § 18.17.100 — § 18.17.140.
• Article 2 — Congregational Land Overlay (CLO): § 18.17.200 — § 18.17.270.
• Article 3 — Mixed‑Use Overlay (MUO): § 18.17.300 — § 18.17.340.
• Chapter 18.18 — Combining Zones (including Historic (H) and Special Housing (SH)): § 18.18.010, § 18.18.100–130.
• Density bonus and concessions (Chapter 18.19) referenced by overlays: Chapter 18.19 (and § 18.19.050 on concessions/incentives).
• Development standards, residential Table 18.10‑02 and design standards Chapter 18.26: § 18.10.090, Table 18.10‑02, § 18.26.010–.030.

Also consult these GoCodebook pages for related procedural topics mentioned above:

• Yorba Linda zoning & planning overview
• Yorba Linda Zoning
• Yorba Linda Development Standards
• Yorba Linda Parking
• Yorba Linda Design Review
• Yorba Linda Historic Preservation
• Yorba Linda ADUs
• California Building Standards Code

Retrieved passages

• Yorba Linda Zoning Code (§ 3) High relevance show source text
• Yorba Linda Zoning Code (§ 15) Medium relevance show source text
• Yorba Linda Zoning Code (§ 3) Medium relevance show source text
• CBC § 18.17.230 (§ 18.17.230.) Medium relevance show source text
• Yorba Linda Zoning Code (§ 14) Medium relevance show source text
• Yorba Linda Zoning Code (§ 18.17.200.) Medium relevance show source text
• Yorba Linda Zoning Code (§ 18.17.040.) Medium relevance show source text
• Yorba Linda Zoning Code Medium relevance show source text
• Yorba Linda Zoning Code (Article 1.) High relevance show source text
• Yorba Linda Zoning Code (Article 3.) High relevance show source text
• CBC § 18.17.250 (§ 18.17.250.) Medium relevance show source text
• Yorba Linda Zoning Code (§ 18.18.090.) Medium relevance show source text
• Yorba Linda Zoning Code (Article 5) Medium relevance show source text

Cited sections

• Title 18 — Yorba Linda Zoning Code, Chapter 18.17 (Overlay Zones): **§ 18.17.010**, **§ 18.17.020**, **§ 18.17.030**, **§ 18.17.040**, **§ 18.17.050**, **§ 18.17.060**. (Title 18)
• Article 1 — Affordable Housing Overlay (AHO): **§ 18.17.100 — § 18.17.140**. (Article 1)
• Article 2 — Congregational Land Overlay (CLO): **§ 18.17.200 — § 18.17.270**. fileciteturn1file1 (Article 2)
• Article 3 — Mixed‑Use Overlay (MUO): **§ 18.17.300 — § 18.17.340**. (Article 3)
• Chapter 18.18 — Combining Zones (including Historic (H) and Special Housing (SH)): **§ 18.18.010**, **§ 18.18.100–130**. fileciteturn1file4 (Chapter 18.18)
• Density bonus and concessions (Chapter 18.19) referenced by overlays: **Chapter 18.19** (and **§ 18.19.050** on concessions/incentives). (Chapter 18.19)
• Development standards, residential Table 18.10‑02 and design standards Chapter 18.26: **§ 18.10.090**, Table 18.10‑02, **§ 18.26.010**–**.030**. fileciteturn1file13 (Chapter 18.26)
• Yorba Linda zoning & planning overview
• Yorba Linda Zoning
• Yorba Linda Development Standards
• Yorba Linda Parking
• Yorba Linda Design Review
• Yorba Linda Historic Preservation
• Yorba Linda ADUs
• California Building Standards Code
• YorbaLinda_ZoningCode.md

• Official Yorba Linda code library