Bell — Overlay Districts

Last reviewed: July 1, 2026

Overview

Bell’s Title 17 Zoning establishes two true overlay districts that layer on top of the city’s base Bell Zoning: the Planned Development Overlay Zone (PD) and the Mixed‑Use Overlay Zone (MUOZ). Overlays are shown on the official zoning map by appending the overlay tag to the underlying zone symbol and they modify how land may be used and developed without changing the base classification itself (e.g., “C‑3(PD)” or “C‑3(MUOZ)”) . The map and Bell’s full set of base districts (R‑1, R‑2, R‑3, C‑3R, C‑3, C‑M, M, T) are established in Chapter 17.12; when an overlay is applied, the “underlying zone classification” still controls allowed uses unless the overlay provides otherwise .

Below is a Bell‑specific, district‑by‑district guide to how the city’s overlays work, what they allow, and the decision standards that matter most.

How to read overlays in Bell

• The official zoning map is adopted in § 17.12.020; overlays are added parenthetically after the base zone symbol on the map .
• “Underlying zone classification” is defined in § 17.08.716; overlays do not change the base zone unless expressly stated .
• Yard terms used below (front, side, rear) are defined in §§ 17.08.748–17.08.756; setbacks in an overlay refer to these yards unless the overlay states otherwise .
• Other citywide requirements (e.g., Bell Development Standards, Bell Parking, Bell Signage, Bell Landscaping and Screening) continue to apply unless an adopted overlay approval makes a specific standard inapplicable .

Planned Development Overlay Zone (PD)

• Purpose and map notation
  • The Planned Development Overlay Zone is created by Chapter 17.48, and appears as “(PD)” after the base zone symbol on the map (e.g., “C‑3(PD)”) .
  • It is intended to provide a reasonably flexible vehicle for high‑quality, innovative site planning and design, while ensuring maintenance of desirable environmental features, chiefly for commercial and industrial projects .
• Where it can apply
  • The PD overlay may be applied only to properties classified R‑3, C‑3, C‑3R, T, C‑M, or M; the overlay is added through a reclassification process and shown on the official zoning map .
• Permitted uses
  • Uses on PD sites are limited to those permitted by the underlying zone; the overlay does not expand use permissions by itself (§ 17.48.040) .
• Development standards and flexibility
  • A precise plan of development (“plan”) is required before any building, structure, or use can commence on a PD‑classified lot (§§ 17.48.050–.060) .
  • Title 17 standards continue to apply unless the approved plan makes particular standards inapplicable; even then, the use list of the underlying zone cannot be broadened by the plan (§ 17.48.090) .
• Approval mechanics and timing
  • The plan is processed per § 17.48.080 (processing) and can be appealed under Title 2, Chapter 2.100 (§ 17.48.080.E) .
  • Plan approval is effective for 12 months, with a possible one 6‑month extension by the director for good cause; “commencement” requires issuance of a valid building permit or other entitlement (§ 17.48.110) .
  • Approved plans may be modified after a noticed public hearing on a showing of good cause (§ 17.48.120) .

Typical use case in Bell

• A property zoned C‑M seeking a master‑planned campus could apply PD to coordinate multiple buildings, internal circulation, and shared amenities, with selective relief from otherwise‑applicable dimensional standards through the approved plan—while still being limited to C‑M permitted uses .

Mixed‑Use Overlay Zone (MUOZ)

• Purpose and map notation
  • The Mixed‑Use Overlay Zone is created by Chapter 17.49 and appears as “(MUOZ)” after the base zone symbol on the map (§ 17.49.010) .
• Where it applies
  • The MUOZ is narrowly mapped: it applies only to lots at 7020–7030 Atlantic Avenue that are currently zoned C‑3 (§ 17.49.020) .
• Permitted uses and mix
  • By right, subject to an administrative site plan review, MUOZ properties may have:
    • Multiple‑family residential above the first floor, up to 30 dwelling units per acre; and
    • Neighborhood‑serving commercial on the first floor, as determined by the Community Development Director; decisions may be appealed under Title 2, Chapter 2.100 (§§ 17.49.040, 17.49.080) .
  • “Neighborhood serving commercial” includes retail, small professional offices, personal services, food stores, eating/drinking places, small cultural facilities (~5,000 sf or less), and similar, and must be within enclosed buildings (§ 17.49.080) .
• Key dimensional standards
  • Minimum lot area: 7,200 sf for MUOZ lots created after 12/31/1989.
  • Minimum lot width: 60 ft (interior), 65 ft (corner/reverse corner).
  • Lot area per dwelling unit: 1,452 sf per unit (equivalent to 30 du/ac).
  • Building height: max 4 stories or 45 ft.
  • Setbacks: Front 15 ft (or average of block depth, whichever is less); Side 5 ft (interior); Side street 10 ft (corner), 15 ft (reverse corner); Rear 10 ft.
  • Building coverage: buildings may cover the lot except required yards and areas required for off‑street parking (§ 17.49.070) .
• Residential standards and limits
  • Principal residential use is limited to upper floors; the first floor must be neighborhood‑serving commercial (§ 17.49.040) .
  • Each unit must include 150 sf of directly accessible private open space (typically a balcony) (§ 17.49.050.C) .
  • Accessory uses allowed include an ADU per Chapter 17.54, home occupations (with specific operation limits), and domestic animals per BMC 6.04.010 (§ 17.49.050.B) . For broader state‑law context, see Bell ADUs.
• Site conduct limitations
  • On MUOZ lots, storage of inoperable vehicles, vehicle repair/dismantling outside of limited exceptions, and commercial vehicle parking are prohibited; exterior lighting must be oriented away from neighboring properties (§ 17.49.060) .

MUOZ — Decision‑Relevant Standards at a Glance

PD — Process Essentials at a Glance

Practical guidance and comparisons

• Use control: The PD overlay never adds new permitted uses; it only allows a customized development plan within the permitted uses of the base zone (§ 17.48.040)—good for coordinated campuses and negotiated site layouts. The MUOZ overlay, by contrast, directly prescribes a use mix (commercial at ground, multifamily above) and sets its own core dimensional standards for just a few parcels on Atlantic Avenue (§§ 17.49.020, 17.49.040, 17.49.070) .
• Development standards: PD flexibility flows through the approved plan—standards can be made inapplicable only if the plan says so, and only for developments otherwise allowed by the base zone (§ 17.48.090) . MUOZ sets explicit numbers (e.g., 45 ft height, 15 ft front yard) and a built‑in 30 du/ac cap via the 1,452 sf/unit ratio (§ 17.49.070) .
• Process: PD requires a discretionary plan approval with specific duration, possible extension, and modification path (§§ 17.48.080–.120), while MUOZ projects proceed via an administrative site plan review for by‑right uses (§ 17.49.040)—still subject to citywide rules like Bell Parking and Bell Signage unless superseded by an applicable approval .
• Interactions with other procedures: If your overlay‑based design cannot meet a standard that is not waived by a PD plan or is fixed by MUOZ, relief would route through Bell’s Bell Variances and Exceptions, not through the overlay itself. Non‑overlay nonconformities are addressed under Bell Nonconforming Uses. A project’s aesthetic and site planning may also be subject to Bell Design Review. Construction must still comply with the California Building Standards Code.

Checklist

• Confirm your parcel’s base zone and whether a PD or MUOZ overlay applies on the official map (§ 17.12.020) and note the “underlying zone classification” (§ 17.08.716) .
• For MUOZ sites: verify location is within 7020–7030 Atlantic Ave; program first‑floor neighborhood‑serving commercial and upper‑floor residential; prepare for administrative site plan review (§§ 17.49.020, 17.49.040, 17.49.080) .
• Check MUOZ dimensional standards: height 45 ft/4 stories, front 15 ft, side 5/10/15 ft as applicable, rear 10 ft, 30 du/ac density, 150 sf private open space per unit (§ 17.49.050.C, § 17.49.070) .
• For PD sites: obtain a precise plan of development before any construction/use; build the plan to address any requested standard modifications; track approval duration (12 months, possible 6‑month extension) and appeal timelines (§§ 17.48.050–.060, .080–.120) .
• Coordinate citywide requirements: Bell Parking, Bell Signage, Bell Landscaping and Screening, and any Bell Design Review triggers still apply unless a PD plan lawfully supersedes a particular standard (§ 17.48.090) .
• For MUOZ, design operations to meet limits on vehicle storage/repair and lighting orientation (§ 17.49.060) .
• If you anticipate needing relief outside a PD plan or MUOZ limits, consult Bell Variances and Exceptions.

Risks & Ambiguities

Plain-English Summary

Bell has two overlays. The PD overlay adds a custom, master‑planning step to qualifying base zones and can tailor certain development standards through an approved plan, but it never adds new uses. The MUOZ overlay, mapped only at 7020–7030 Atlantic Avenue, requires ground‑floor neighborhood‑serving shops or services with apartments above, and sets clear height, setback, and density numbers.

Information Gaps

• Content requirements for a PD “precise plan of development” application and the full processing steps/findings in § 17.48.080: Not found in retrieved materials.
• Any MUOZ‑specific parking ratios or design review triggers beyond general citywide standards: Not found in retrieved materials.
• Current parcel list/APNs for the MUOZ (beyond street addresses in § 17.49.020): Verify with the jurisdiction.

Source References

• Title 17 definitions and districts: §§ 17.08.716; 17.12.010–.020; 17.08.748–.756
• Planned Development Overlay: Chapter 17.48, including §§ 17.48.010–.060, .080–.120 (creation, applicability, use limits, plan requirement, exceptions, appeals, duration, modification)
• Mixed‑Use Overlay: Chapter 17.49, including §§ 17.49.010–.080 (creation, location, purpose, permitted uses, residential standards, development standards, neighborhood‑serving commercial definition)
• Citywide operational limits on MUOZ properties: § 17.49.060
• Orientation pages: Bell zoning & planning overview, Bell Land Use, Bell Development Standards, Bell Parking, Bell Design Review, Bell Nonconforming Uses, Bell Variances and Exceptions, Bell Signage, Bell Landscaping and Screening, Bell ADUs, California Building Standards Code

Retrieved passages

• Bell Zoning Code (article and) High relevance show source text
• Bell Zoning Code (§ 17.49.030.) High relevance show source text
• Bell Zoning Code (§ 1) High relevance show source text
• Bell Zoning Code (§ 9423) High relevance show source text
• Bell Zoning Code (§ 17.08.748.) High relevance show source text
• Bell Zoning Code (§ 17.08.700.) Medium relevance show source text
• CBC § 66321 (§ 66321) Medium relevance show source text
• Bell Zoning Code (title with) Medium relevance show source text

Cited sections

• Title 17 definitions and districts: §§ 17.08.716; 17.12.010–.020; 17.08.748–.756 (Title 17)
• Planned Development Overlay: **Chapter 17.48**, including §§ 17.48.010–.060, .080–.120 (creation, applicability, use limits, plan requirement, exceptions, appeals, duration, modification) (Chapter 17.48)
• Mixed‑Use Overlay: **Chapter 17.49**, including §§ 17.49.010–.080 (creation, location, purpose, permitted uses, residential standards, development standards, neighborhood‑serving commercial definition) (Chapter 17.49)
• Citywide operational limits on MUOZ properties: § 17.49.060 (§ 17.49.060)
• Orientation pages: Bell zoning & planning overview, Bell Land Use, Bell Development Standards, Bell Parking, Bell Design Review, Bell Nonconforming Uses, Bell Variances and Exceptions, Bell Signage, Bell Landscaping and Screening, Bell ADUs, California Building Standards Code
• Bell_ZoningCode.md

• Official Bell code library