Paramount — Nonconforming Uses

Last reviewed: July 2, 2026

Overview

This page explains how the City of Paramount treats nonconforming uses, nonconforming buildings/structures, and nonconforming lots under the local zoning code (Title 17). Key rules cover continuation, expansion limits, automatic expiration for discontinued uses, reconstruction after damage, and a Planning Commission role in fixing abatement/removal dates. For operational topics like required parking, see the city’s parking rules; for dimensional rules see the city's development standards; for approvals that may be required for changes see the city’s design review and variance processes. See also how ADUs are treated under local ADU rules. Paramount Parking Paramount Development Standards Paramount Design Review Paramount Variances and Exceptions Paramount Overlay Districts Paramount ADUs California Building Standards Code

All legal statements below are tied to the Paramount Municipal Code; each requirement is shown with the controlling code citation (the § glyph plus number) and the document citation from the retrieved ordinance text.

What the code says — core rules (plain summary tied to the code)

• A nonconforming use or building that lawfully existed before the current zoning rules may be continued in many cases, but the city sets limits on expansion, structural alteration, and how long a nonconforming building may remain before required abatement or removal. See § 17.44.560, § 17.44.550, and § 17.44.630.
• A nonconforming use that is discontinued or suspended for an extended, specified period will automatically expire: 180 days for many nonconforming uses and other specific discontinuance rules; longer automatic-abatement schedules apply to certain buildings. See § 17.44.640.
• If a nonconforming building is partially destroyed, restoration is allowed only under limits (commonly up to 50% of value) and subject to conditions; single‑family legal nonconforming residences have different treatment. See § 17.44.540.
• The Planning Commission may set a specific abatement or removal date for a nonconforming building and must file that decision (recorded) — and the owner has appeal rights. See § 17.44.630(D).
• For industrial zones (M‑1, M‑2) and planned PD‑PS lands, the code creates a narrow allowance that certain legal nonconforming manufacturing uses (including metal and non‑metal uses existing as of specific dates) may expand only with a Conditional Use Permit (CUP) and subject to environmental and SCAQMD requirements. See § 17.44.660, § 17.72.180–200, § 17.36.070–080.

District-by-district breakdown

Below are the districts explicitly referenced in Title 17 where nonconforming rules are applied. For each district we list the code excerpts that control nonconformity and note where the code does not provide full dimensional details (see "Information Gaps" later).

R (Residential) zones — R-1, R-2, R-3

• Purpose: The "R" zones are residential districts; the code treats residential uses differently when they are legal nonconforming (special allowances for rebuilding and abatement timelines). Notation in the nonconforming article repeatedly references the "R" zones. § 17.44.630 and § 17.44.640 govern removal and expiration for R zones.
• Typical permitted uses: Not found in retrieved materials (the general use tables for R‑zones are outside the supplied snippets). Verify permitted residential uses in the full zoning tables. Verify with the jurisdiction.
• Key dimensional standards (setbacks, lot coverage, FAR, height): The ordinance refers to "R‑3 zone development standards" when requiring nonconforming residential enlargements to conform, but exact numeric standards are Not found in retrieved materials. See § 17.44.550(D)(3) for the requirement to conform to R‑2/R‑3 standards when enlarging nonconforming residential buildings.
• Where it applies: Any lot zoned R-1, R-2, R-3; nonconforming residential buildings may have limited rights to rebuild, restore, or enlarge under the rules cited above. § 17.44.540 addresses reconstruction of partially destroyed nonconforming buildings (note: single‑family residences treated specially).

C (Commercial) zones — C‑3, C‑M

• Purpose: Commercial activity; the code requires abatement schedules for nonconforming buildings whose original use would now be allowed only in more industrial zones. See § 17.44.630.
• Typical permitted uses: Not found in retrieved materials for full lists; the nonconforming article references conversions from C‑3 to C‑M/M‑zones as examples. Verify full permitted uses in the zoning chapters for C‑3 and C‑M.
• Key dimensional standards: Not found in retrieved materials. The abatement schedule for C‑3 nonconforming buildings includes measurement rules tied to building type and ownership transfer (see § 17.44.630(A) for time frames and building type categories).
• Where it applies: Applies to properties zoned C‑3 and C‑M where a building was designed for or used for a different classification now not permitted.

M (Manufacturing/Industrial) zones — M‑1, M‑2

• Purpose: Industrial/manufacturing; Title 17 contains special rules for legal nonconforming industrial uses, including limited expansion pathways tied to environmental controls. See § 17.44.660, § 17.36.070–090, § 17.32.090.
• Typical permitted uses: Manufacturing, processing, warehousing, etc. Specific permitted-use lists are in the M‑zone chapters (example: § 17.32.090 lists M‑1 limitations). For exact permitted use lists, consult the M‑zone chapters.
• Key dimensional standards: Not found in retrieved materials in the supplied excerpts. The M‑zone nonconformity rules do state that long abatement periods (often a 10‑year minimum) may apply depending on building type or ownership timeline; building types are referenced to the City's building code. See § 17.44.630 for timelines.
• Where it applies: Applies to M‑1 and M‑2 parcels. Certain uses that became nonconforming after rezone dates (notably uses existing prior to 9/4/2018) may remain and can expand only with Planning Commission approval (CUP) and environmental compliance. See § 17.44.660, § 17.72.180–200, and § 17.36.070–080.

PD‑PS (Planned Development / Public Service) — PD‑PS

• Purpose: Planned development / public-service overlay where specialized nonconforming rules were adopted for historical industrial operations. See § 17.44.660 and PD‑PS subsections § 17.72.180–200.
• Typical permitted uses: See PD chapter for permitted uses. The nonconforming sub‑articles treat metal‑related and non‑metal manufacturing separately, allowing legal nonconforming operations as of specified dates to continue and possibly expand with CUP and environmental controls. § 17.72.180–190 detail these rules.
• Key dimensional standards: Not found in retrieved materials for numeric dimensional standards; expansion requires CUP and compliance with other code requirements.
• Where it applies: Parcels designated PD‑PS in the zoning map.

Decision‑relevant quick table

How these rules affect common situations (practical guidance)

• If you operate an industrial use in M‑1, M‑2 or PD‑PS that became nonconforming after a rezoning (dates memorialized in the code), you can potentially expand operations only after securing a Conditional Use Permit (CUP) from the Planning Commission and meeting environmental/air‑quality controls and permits (SCAQMD). See § 17.44.660 and the PD‑PS sections 17.72.180–200.
• If a permitted nonconforming use stops operating (no activity) for 6 months (for some legal nonconforming uses the code uses 6 months as a forfeiture rule) or 180 days for automatic expiration rules, the establishment loses nonconforming status. (See subdivided rules: § 17.44.660(J) and § 17.44.640(A).)
• If your building is partially destroyed, the ability to rebuild depends on the damage percentage and whether the building is a legal nonconforming single‑family residence. See § 17.44.540 for the 50% threshold (single‑family exception stated).
• Converting a garage into living space: conversions after certain historic cut‑off dates were prohibited unless they fully comply with development standards; garage conversions prior to July 1, 1986 may be legal nonconforming. See § 17.44.590.
• If a nonconforming use requires building or exterior improvements to be enclosed (per code), the Planning Commission can require enclosure within 3 years of notice. See § 17.44.610 and § 17.44.620 (exterior improvements). Paramount Landscaping and Screening may be relevant when exterior conditions are enforced.

Checklist (what an applicant/property owner must satisfy or check before filing)

• Confirm whether the use/building was lawfully established before the controlling ordinance date (gather deeds, permits, dated business records) — Planning Commission may require proof. See § 17.44.630(D).
• Verify whether the use/operation has been continuously active (no suspension > 180 days or other specific time‑frames), because discontinuance can cause automatic expiration. See § 17.44.640 and § 17.44.660(J).
• If you seek to enlarge or alter a nonconforming building/use, determine whether a Variance or Conditional Use Permit is required (industrial expansions typically require a CUP). See § 17.44.550 and the M‑zone nonconforming subsections (§ 17.44.660, § 17.72.180–190).
• For expansions in M‑zones/PD‑PS, prepare to comply with environmental laws (CEQA), South Coast Air Quality Management District rules, and required best‑available control technology. See § 17.72.180–200 and § 17.44.660(G).
• Check whether the Planning Commission has already set an abatement/removal date on record for the property (county recorder). If so, that date controls. See § 17.44.630(D).
• Confirm whether building repairs or additions trigger other city processes (Development Review, Design Review) and whether parking or signage rules will change with any proposed modifications. See Paramount Design Review and Paramount Signage.

Risks & Ambiguities

Information Gaps (what the retrieved materials do not show)

• Exact lists of permitted uses and numeric dimensional standards (front setbacks, side yards, lot coverage, FAR, height limits) for R‑1, R‑2, R‑3, C‑3, C‑M, M‑1, M‑2, and PD‑PS were Not found in the retrieved materials. Verify with the full zone chapters in Title 17 or the city zoning map.
• The full procedural checklists and application submittal requirements (CUP submittal packet, variance criteria forms) are Not found in the snippets provided; consult the Planning Department application guides or Chapter 17.48 for appeals and procedural rules.
• Any recent amendments or ordinance recitals beyond those visible in the provided excerpts (examples: Ordinance No. 571, Ord. 1198, 4/22/2025) should be verified with the official city website or Planning Department to confirm whether dates/thresholds have changed.

Plain‑English Summary

If your business or building in Paramount predates a zoning change, you may be allowed to keep operating even if the use no longer conforms — but there are strict limits: stop operating for too long (commonly 180 days), expand improperly, or significantly rebuild and you can lose that protection. Industrial nonconforming uses have a narrow expansion path (CUP + environmental permits). The Planning Commission can set and record a removal date that limits how long the nonconforming structure can remain. See § 17.44.640, § 17.44.550, and § 17.44.630.

Source References

• Paramount Municipal Code, Title 17 — Article on Nonconforming Uses and Buildings: § 17.44.530 – § 17.44.680 (contains the full set of nonconforming rules cited above).
• Nonconforming use limits and continuations: § 17.44.560, § 17.44.570, § 17.44.580.
• Abatement, removal, and Planning Commission procedures: § 17.44.630 (procedure for determination and recording of removal date).
• Automatic expiration and timelines: § 17.44.640 (180‑day rule and abatement provisions).
• Reconstruction and alteration rules: § 17.44.540, § 17.44.550, § 17.44.560.
• Garage conversions: § 17.44.590.
• Industrial / M‑zone special nonconforming rules and PD‑PS rules (expansion with CUP, SCAQMD, best available control tech): § 17.44.660, § 17.72.180–200, § 17.36.070–080.
• Signs and nonconforming signage timeframes: § 17.44.650.
• ADU definitions and nonconforming condition treatment: § 17.104.030(C) and ADU chapter. Paramount ADUs

Retrieved passages

• Paramount Zoning Code (§ 17.44.570.) High relevance show source text
• Paramount Zoning Code (Article 4) High relevance show source text
• Paramount Zoning Code (title for) High relevance show source text
• California Building Code (title derives) High relevance show source text
• CBC § 44 (title derives) High relevance show source text
• Paramount Zoning Code (section violated) High relevance show source text
• Paramount Zoning Code (§ 44-142.1) High relevance show source text
• Paramount Zoning Code (title derives) High relevance show source text

Cited sections

• Paramount Municipal Code, Title 17 — Article on Nonconforming Uses and Buildings: **§ 17.44.530 – § 17.44.680** (contains the full set of nonconforming rules cited above). (Title 17)
• Nonconforming use limits and continuations: **§ 17.44.560**, **§ 17.44.570**, **§ 17.44.580**. (§ 17.44.560)
• Abatement, removal, and Planning Commission procedures: **§ 17.44.630** (procedure for determination and recording of removal date). (§ 17.44.630)
• Automatic expiration and timelines: **§ 17.44.640** (180‑day rule and abatement provisions). (§ 17.44.640)
• Reconstruction and alteration rules: **§ 17.44.540**, **§ 17.44.550**, **§ 17.44.560**. (§ 17.44.540)
• Garage conversions: **§ 17.44.590**. (§ 17.44.590)
• Industrial / M‑zone special nonconforming rules and PD‑PS rules (expansion with CUP, SCAQMD, best available control tech): **§ 17.44.660**, **§ 17.72.180–200**, **§ 17.36.070–080**. (§ 17.44.660)
• Signs and nonconforming signage timeframes: **§ 17.44.650**. (§ 17.44.650)
• ADU definitions and nonconforming condition treatment: **§ 17.104.030(C)** and ADU chapter. Paramount ADUs (§ 17.104.030)
• Paramount_ZoningCode.md

• Official Paramount code library