Montebello — Nonconforming Uses

Last reviewed: July 2, 2026

Overview

This page summarizes what the Montebello zoning ordinance allows and requires for legally established uses, buildings, structures and lots that no longer meet current zoning rules (i.e., nonconforming conditions). It interprets Montebello's rules for continuing, repairing, altering, amortizing and abating nonconforming uses and structures; gives district-level guidance; and lists the most decision-relevant numeric limits and appeal paths. All items below are grounded to Montebello's ordinance text: primarily Chapter 17.54 (Nonconforming Uses and Structures) and related provisions. Verify with the jurisdiction for parcel‑specific interpretations. § 17.54.010 through § 17.54.120 are the controlling sections.

Important internal links (first natural mention only): development standards are discussed below and link to Montebello's development standards, parking is discussed where relevant and links to Montebello parking, appeals and alternatives reference Montebello variances and exceptions, requests for design or visual changes can raise design review issues (see Montebello design review), and overlay-specific items reference Montebello overlay districts. Where alterations could trigger an accessory unit or replacement dwelling review, see Montebello ADUs. When the code allows repairs to meet health/safety law, those references point to the California Building Standards Code.

What the ordinance actually says — short list of governing rules

• Nonconforming uses/buildings/structures that were lawful when established may continue but are limited in expansion, relocation, or change to a different nonconforming use. See § 17.54.020, § 17.54.030, § 17.54.050.
• Nonconforming buildings/structures terminate if demolished (>50% exterior walls removed), the use changes to a conforming use, or the nonconformity is enlarged (subject to exceptions). See § 17.54.040(B).
• Amortization / time limits differ by type (abandonment rules, building type useful life, or specified multi‑year periods). See § 17.54.040(B) and § 17.54.050(B).
• Routine maintenance and limited repair are allowed but there are cost thresholds (most commonly 15% or 37% of fair market value depending on context) that trigger additional requirements; partial destruction and reconstruction have explicit percent limits and time windows. See § 17.54.040(C) and related subsections.
• The director may issue abatement orders; affected owners can appeal to the Planning Commission and request an extension of amortization subject to findings and time limits. See § 17.54.070, § 17.54.090, § 17.54.110.
• Special/amplified rules apply for specific categories (for example: adult businesses have separate amortization rules and zone limits — only M-1 and M-2). See § 17.60.110–§ 17.60.130.

District-by-district breakdown (how the nonconforming rules apply by zone)

Note: Montebello's nonconforming provisions are written as city‑wide rules (§ references below) and then give targeted rules by zone type. Where the ordinance points to numeric development standards (setbacks, lot area, heights) it refers readers to separate exhibits/chapters — see the citations.

Residential zones (the R zones — e.g., R-3 example in the code)

• Purpose & where it applies: Applies to any residentially zoned lot rendered nonconforming by later zoning or development standards changes; Montebello refers to “Residential Zones” in the nonconforming chapter. See § 17.54.040(D)(1).
• Typical permitted uses: Existing residential uses may continue; no increase in the number of dwelling units is allowed if the nonconformity is solely parking‑related. See § 17.54.040(D)(1)(a)(i).
• Key dimensional / action rules:
  • Ordinary health & life‑safety repairs allowed without limit (to meet building/code requirements). See § 17.54.040(C)(5) and § 17.54.040(D)(1)(a)(iv)(A).
  • Non‑safety repairs limited to 37% of fair market value within any 12‑month period before they trigger stricter conformity requirements for residential zones (see repair/maintenance caps). See § 17.54.040(C)(1) and § 17.54.040(D)(1)(a)(iv)(B).
  • Yard/setback additions may not increase encroachment; no addition closer than 3 ft to internal side or rear lot line; cannot enlarge into front setbacks except limited porch enclosures. See § 17.54.040(D)(1)(b)(i–iii).
• Where to find district numeric standards: The code points to the residential development standards exhibits (Chapters 17.10–17.20) for the specific setback/coverage/FAR numbers; verify exact numbers there. Not all numeric setback/height figures are in the nonconforming chapter itself.

Commercial and Industrial zones (including M-1, M-2)

• Purpose & where it applies: The same chapter addresses commercial and industrial nonconforming buildings and uses; certain businesses (adult businesses) have zone‑specific rules. See § 17.54.040(D)(2) and § 17.60.130.
• Typical permitted uses: Existing commercial/industrial uses allowed to continue if lawful when established, subject to non‑expansion limits. See § 17.54.050(A).
• Key dimensional / action rules:
  • Repair/maintenance allowed; if work exceeds 37% of the building’s fair market value, then full compliance with current off‑street parking rules may be required (see parking thresholds below). See § 17.54.040(C)(3) and § 17.54.040(D)(2)(a)(i).
  • If an alteration costs ≤ 37% but would itself require new parking, the minimum parking is the greater of 75% of existing spaces or the number required for the alteration. See § 17.54.040(D)(2)(a)(iii)(A–B).
  • Decorative façade nonconformity: if façade work exceeds 15% of fair market value in a 12‑month period, the building must be brought into full compliance. See § 17.54.040(D)(2)(c).
• Industrial specifics: Adult businesses are allowed only in M-1 and M-2 and have separate amortization/abatement rules. See § 17.60.130 and the adult business amortization procedures in § 17.60.110–120.

High‑Occupancy Overlay (HOO) and Downtown Code areas

• Purpose & where it applies: The HOO and Downtown Code are special zoning overlays/codes that may supersede base‑zone rules for properties within their boundaries; the code says legal nonconforming status survives map approvals but the overlay may offer options. See § 17.47.030–050 and Downtown Code excerpts.
• Typical permitted uses: HOO allows uses in the underlying base zone and multiple‑family dwellings under the overlay rules; conversion of nonresidential into residential may be allowed with a conditional use permit. See § 17.47.040(E).
• Key dimensional rules: HOO includes density ranges (example: 20–80 units/acre, with minimum 16 units per site and examples like R-3-DD-25) — consult HOO chapter for exact numeric standards applicable to a parcel. See § 17.47.050.
• Interaction with nonconformities: Approval of tentative maps or development under downtown/HOO does not automatically eliminate existing legal nonconforming status, but future development may require conformity to the overlay. See Downtown Code language and § 17.54 cross‑references.

Quick reference table — decision‑relevant standards and limits

How to use the code in practice — plain guidance and interpretation

• Start by confirming legal nonconforming status with the planning department: the city determines the date the use or structure became nonconforming and the applicable amortization/abatement timetable. See § 17.54.080 for fair market value dispute procedure.
• Small repairs that address health and safety are explicitly allowed without counting toward enlargement caps; larger rehabilitation work requires a fair market value calculation and may trigger parking, façade, or full compliance requirements. See § 17.54.040(C)(1–3) and § 17.54.040(D).
• If you plan to alter a building that is nonconforming because of missing parking, calculate whether the work exceeds 37% FMV — if it does, you probably must bring parking into compliance per Chapter 17.52 (see Montebello parking).
• For amortization or abatement notices, use the appeal procedures in § 17.54.090 and the public‑hearing processes in Chapter 17.78; requests for extension of amortization must meet strict findings and have time limits (extensions cannot exceed 10 years).

Checklist (what an applicant/property owner must satisfy before starting work or filing an appeal)

• Confirm whether the use or structure is a legal nonconforming through an official determination by the Planning Department. See § 17.54.080.
• Determine which amortization/abatement timeline applies (6 months abandonment, 5 years for nonconforming use in nonconforming building, 20 years for nonconforming use in conforming building, building‑type useful life schedules). See § 17.54.040(B) and § 17.54.050(B).
• Calculate fair market value (FMV) baseline used by the city; gather appraisal or financials if you expect disagreement. Use appeal process in § 17.54.080 if needed.
• If planning repairs/alterations, estimate cost as % of FMV to check the 15%, 37%, or other thresholds that trigger conformity or parking obligations. See § 17.54.040(C), § 17.54.040(D).
• If parking is an issue, confirm off‑street parking requirements in Chapter 17.52 and propose on/off‑site or fee‑in‑lieu options (code allows discretionary fee in lieu). See § 17.54.040(D)(2)(b) and Chapter 17.52.
• For an abatement order, prepare to appeal following § 17.54.090 and Chapter 17.78 — prepare evidence for the required findings (especially if requesting extension).

Risks & Ambiguities

Plain-English Summary

Montebello lets legal nonconforming uses and buildings keep operating, but you generally cannot expand or move them; routine health/safety repairs are allowed but larger rehab projects above specific cost thresholds (commonly 15% or 37% of fair market value) will usually force you to comply with current parking and development standards. If the use is abandoned (commonly 6 months) or the amortization period elapses, the city can require cessation — but you may appeal. Key rules live in § 17.54.010–120 and related chapters for parking and appeals.

Source References

• Montebello Zoning Code — Chapter 17.54 (Nonconforming Uses and Structures): § 17.54.010 through § 17.54.120 (primary text for nonconforming rules).
• Montebello Zoning Code — Repairs/zone‑specific rules and thresholds (repair limits, partial destruction, parking triggers): § 17.54.040(C–D) and § 17.54.050.
• Abatement, notice and appeals: § 17.54.070, § 17.54.080, § 17.54.090, § 17.54.100, § 17.54.110.
• Adult business (special amortization) rules and zone limits (M‑1, M‑2): § 17.60.110–130.
• HOO (overlay) and Downtown Code references where nonconformity interaction is discussed: § 17.47.040–050 and Downtown Code passages.

(For any parcel‑specific action, verify with Montebello Planning & Community Development; many development numbers are in the development standards exhibits and Chapter 17.52 for parking.)

Retrieved passages

• CBC § 5 (§ 5) High relevance show source text
• CBC § 9247.4 (§ 9247.4) High relevance show source text
• Montebello Zoning Code (§ 3) High relevance show source text
• CBC § 1985 (section shall) High relevance show source text
• CBC § 5 (Section 17.52.050) High relevance show source text
• Montebello Zoning Code (section may) High relevance show source text
• Montebello Zoning Code (§ 4) High relevance show source text
• Montebello Zoning Code (title which) High relevance show source text

Cited sections

• Montebello Zoning Code — Chapter **17.54** (Nonconforming Uses and Structures): **§ 17.54.010** through **§ 17.54.120** (primary text for nonconforming rules). (§ 17.54.010)
• Montebello Zoning Code — Repairs/zone‑specific rules and thresholds (repair limits, partial destruction, parking triggers): **§ 17.54.040(C–D)** and **§ 17.54.050**. (§ 17.54.040)
• Abatement, notice and appeals: **§ 17.54.070**, **§ 17.54.080**, **§ 17.54.090**, **§ 17.54.100**, **§ 17.54.110**. (§ 17.54.070)
• Adult business (special amortization) rules and zone limits (**M‑1**, **M‑2**): **§ 17.60.110–130**. (§ 17.60.110)
• HOO (overlay) and Downtown Code references where nonconformity interaction is discussed: **§ 17.47.040–050** and Downtown Code passages. (§ 17.47.040)
• Montebello_ZoningCode.md

• Official Montebello code library