Del Mar — Nonconforming Uses

Last reviewed: July 2, 2026

Overview

This page synthesizes what the Del Mar Zoning Ordinance (Title 30) says about nonconforming uses, structural nonconformities, and nonconforming lots — what qualifies, how long they may continue, and what happens when you repair, remodel or abandon them. The controlling rules live in Chapter 30.76 — Nonconformities of the Del Mar Municipal Code; key related policies appear in the Central Commercial rules and zone chapters cited below (§30.76.010–§30.76.130, §30.22.034, §30.20.070).

Note: where this page mentions design, setbacks, parking, or ADUs it links to Del Mar’s local reference pages for those topics so you can jump to related guidance: Del Mar Zoning, Del Mar Development Standards, Del Mar Parking, Del Mar Design Review, Del Mar Overlay Districts, Del Mar ADUs, and the California Building Standards Code.

What the code actually says — essentials

• A nonconforming use exists where an established use was lawful when created but does not fall within the zone’s allowed uses today (§ 30.76.020).
• A structural nonconformity is a physical feature (height, setback, lot area, coverage, parking, etc.) that was lawful when built but now violates current development standards (§ 30.76.030).
• The property owner bears the burden of proof to establish legal nonconforming status (§ 30.76.040) — bring old permits, maps, photographs or valuation evidence.
• You generally cannot enlarge or intensify a nonconforming use or structural nonconformity (§ 30.76.050) and routine repairs are allowed only so long as they do not increase the nonconformity (§ 30.76.060).
• If a building with a structural nonconformity is damaged or remodeled over a threshold ( > 50% of valuation), the repair/remodel must comply with current code (§ 30.76.070). For smaller repairs (< 50%) the nonconformity may remain but the owner may need to covenant to complete work within 18 months or abandon the nonconformity.
• A nonconforming lot (legal lot of record that is smaller than the current minimum) may still have a single building constructed so long as the lot is legal, has not merged, and is not mergeable (§ 30.76.080).
• A nonconforming use generally terminates if inactive for 180 consecutive days, except where the code specifies other timeframes (see Street‑Frontage rules and special categories) (§ 30.76.090.E).

District-by-district/zone breakdown (how nonconformities play out in specific Del Mar zones)

Below are the Del Mar zones covered in the Municipal Code excerpts provided. For each I summarize the zone purpose, typical permitted uses, the most decision-relevant dimensional standards that appear in the code extract, and where in the city the zone commonly applies (as indicated by the ordinance text). Always verify the parcel-specific zone and map location with the City.

R2 — R2 Zone (Multi-family low/medium)

• Purpose & typical uses: Multi‑family residential uses up to the zone density. Chapter title: 30.20 — R2 Zone.
• Key dimensional/development standards (decision-relevant): Minimum lot size 7,000 sq ft, minimum street frontage 35 ft, setbacks: front 20 ft, rear 20 ft, interior side 5 ft, street side 10 ft, height 26 ft, FAR 35%, lot coverage 50% (§ 30.20.070).
• Where it applies: The R2 chapter covers the R2 zone map areas identified by ordinance; R2 is referenced in neighborhood allocations (e.g., South Bluff references). See zone map for parcel-level placement. Note: where a property in R2 is nonconforming (use or structure), the rules of Chapter 30.76 apply (repair, non‑enlargement, >50% rebuild triggers compliance).

RM — RM‑East / RM‑West / RM‑Central / RM‑South (Multifamily / higher density)

• Purpose & typical uses: Multifamily and related accessory uses; the RM chapters list allowed accessory uses and conditional uses and require design review in several RM subzones. Chapter references: 30.19 — RM Zones.
• Key standards / process flags: RM zones reference their own density and parking rules (see Chapter 30.19) and require Design Review for development in RM‑South; nonconforming multifamily dwellings of three or more units may be reconstructed so long as unit counts, height, building profile and parking are not increased (§ 30.76.120).
• Where it applies: RM subzones are used across Del Mar’s neighborhoods (RM‑East/West in North Beach, RM‑South in South Bluff, etc., as referenced in other overlay policy text). Verify parcel zone on the City Zone Map.

RC — RC (Residential‑Commercial) Zone

• Purpose & typical uses: Mixed residential and small‑scale commercial; identified as Chapter 30.21 — RC.
• Key considerations for nonconformities: Nonconforming commercial or residential uses in RC are subject to Chapter 30.76 rules; the code retains specific downtown/retail‑oriented policies and exceptions (see Central Commercial and street‑frontage rules).

Central Commercial — CC / Central Commercial Zone

• Purpose & typical uses: Downtown/commercial retail uses; the CC zone includes special street‑frontage rules for storefront space and continuity of pedestrian‑oriented retail. See 30.22.030–30.22.036 excerpts on continuation/abatement of nonconforming uses in Street‑Frontage Building Spaces.
• Decision‑relevant nonconforming specifics: A nonconforming use in a Street‑Frontage Building Space may continue unless abandoned, enlarged, intensified, or the building is destructed/uninhabitable (§ 30.22.034). The code defines abandonment = 12 consecutive months for these street‑frontage spaces (different from the general 180‑day rule).

Bluff, Slope and Canyon Overlay — BSC‑OZ (BSC Overlay)

• Purpose & typical uses: Preserve scenic bluffs, steep slopes and related resource protections; the overlay modifies how underlying zone rules apply and is explicitly part of the Local Coastal Program; overlay rules may not be relaxed through the general variance process. See 30.52.
• Nonconformity interaction: Underlying zone uses apply unless the overlay says otherwise; where there is conflict, the overlay language controls. Nonconformity relief in overlay areas may be more limited (verify with Chapter 30.52).

Quick reference table — top decision-relevant nonconformity rules

Practical guidance / interpretation (plain-English synthesis)

• First step for any claim of nonconforming status: collect contemporaneous evidence that the use or structure was lawful when created — old permits, building valuation/assessor records, photographs, lease or business records. The code explicitly places the burden of proof on the owner (§ 30.76.040).
• If you plan work on a building with a nonconforming feature, calculate whether the proposed work (plus any work done in the prior 12 months) will exceed 50% of building valuation; exceeding that threshold triggers a requirement to bring the project into conformance (§ 30.76.070).
• For commercial street‑frontage spaces downtown, note the different abandonment rule: 12 months rather than 180 days; this matters if a tenant leaves and you want to preserve a legacy nonconforming use or convert to a conforming use (§ 30.22.034).
• If the nonconformity is about parking (e.g., garage or on‑site parking), there are specific rules requiring compliance in many remodels unless the remodel’s valuation is <50% and the project preserves dedicated space for parking (§ 30.76.075). Also consult Del Mar Parking and Chapter 30.80 for parking specifics.
• Overlays may add more restrictive rules or remove variance relief options (for example, the BSC Overlay is part of the certified Local Coastal Program and limits relief). Always check overlay chapters in addition to the base zone. See Del Mar Overlay Districts and Chapter 30.52.

Checklist — what an applicant asserting or modifying a nonconformity must show or do

• Provide documentary evidence that the use or structure was lawful under prior zoning (permits, plans, assessor records) — burden under § 30.76.040.
• Confirm whether the proposed work will increase the nonconformity or cause enlargement/intensification (enlargement prohibited under § 30.76.050) and document how it will not.
• If remodeling/repairing, prepare an estimate of project valuation vs. current building valuation (50% threshold triggers full compliance) (§ 30.76.070) and disclose recent remodeling within the prior 12 months.
• If parking is nonconforming, include a parking plan and show whether the project valuation is <50% or meets the special garage‑parking exception (§ 30.76.075); coordinate with Del Mar Parking.
• If the property is in an overlay (e.g., BSC‑OZ), demonstrate overlay compliance or show where overlay allows the continuation of a nonconformity (§ 30.52).
• For downtown street‑frontage spaces, document any vacancy history (abandonment = 12 months) to establish whether the nonconforming status has lapsed (§ 30.22.034).
• Be prepared for Design Review and/or Planning Commission findings if the project proposes to retain some nonconformities as part of a redevelopment project (§ 30.76.130).

Risks & Ambiguities

Information Gaps (what the retrieved materials did not confirm)

• Exact dimensional standards for every R‑1 variant (R1‑5, R1‑10, R1‑14, R1‑40, etc.) were not present in the retrieved excerpts. Verify R‑1 standards in the full zoning chapters. Not found in retrieved materials.
• Full text of Chapter 30.21 (RC) development standards and permitted‑use list were not included in the excerpts. Not found in retrieved materials.
• Parcel‑specific determinations (whether a lot has legally merged, the Planning Director’s precise valuation method) are not in the excerpts — these are administrative actions and require case file review. Verify with the City. Not found in retrieved materials.

Plain-English Summary

If your Del Mar property or use predates a zoning change, you may have a legal nonconforming use or structural nonconformity — but you cannot enlarge it or intensify it, you must prove it was lawful when established, and major damage or major remodeling (over 50% of value) usually forces you to comply with current code; inactivity can also terminate the nonconforming entitlement (generally 180 days, but 12 months for downtown street‑frontage retail spaces).

Source References

• Del Mar Municipal Code — Chapter 30.76: Nonconformities (§ 30.76.010 – § 30.76.130) — definitions, repair/remodel rules, termination rules, nonconforming lots.
• Del Mar Municipal Code — 30.22.034 — Continuation and Abatement of Non‑Conforming Use of Street‑Frontage Building Spaces (Central Commercial rules on abandonment = 12 months).
• Del Mar Municipal Code — 30.20.070 — R2 Zone development standards (setbacks, height, FAR, lot size).
• Del Mar Municipal Code — 30.19 — RM Zone excerpts (uses, design review requirements for RM‑South).
• Del Mar Municipal Code — 30.52 — Bluff, Slope and Canyon Overlay Zone (BSC‑OZ) (overlay special rules; LCP consistency).
• Del Mar Municipal Code — 30.76.075 — Nonconforming garage parking requirements (when parking must be brought into compliance).
• Del Mar ADU/state guidance (uploaded summary) — California ADU law and interaction with nonconforming zoning conditions (for ADU questions, state law constraints may apply).

Retrieved passages

• Del Mar Zoning Code (Chapter that) High relevance show source text
• Del Mar Zoning Code (Chapter 30.76) High relevance show source text
• CBC § 824 (Section occurs) High relevance show source text
• Del Mar Zoning Code (Section to) High relevance show source text
• Del Mar Zoning Code (Section shall) High relevance show source text
• Del Mar Zoning Code (Title shall) High relevance show source text
• Del Mar Zoning Code (Chapter 23.08.) High relevance show source text
• Del Mar Zoning Code (Chapter 23.08.) Medium relevance show source text
• Del Mar Zoning Code (Chapter 3) Medium relevance show source text

Cited sections

• Del Mar Municipal Code — **Chapter 30.76: Nonconformities** (§ **30.76.010** – § **30.76.130**) — definitions, repair/remodel rules, termination rules, nonconforming lots. (Chapter 30.76)
• Del Mar Municipal Code — **30.22.034 — Continuation and Abatement of Non‑Conforming Use of Street‑Frontage Building Spaces** (Central Commercial rules on abandonment = 12 months).
• Del Mar Municipal Code — **30.20.070 — R2 Zone development standards** (setbacks, height, FAR, lot size).
• Del Mar Municipal Code — **30.19 — RM Zone** excerpts (uses, design review requirements for RM‑South).
• Del Mar Municipal Code — **30.52 — Bluff, Slope and Canyon Overlay Zone (BSC‑OZ)** (overlay special rules; LCP consistency).
• Del Mar Municipal Code — **30.76.075 — Nonconforming garage parking requirements** (when parking must be brought into compliance).
• Del Mar ADU/state guidance (uploaded summary) — California ADU law and interaction with nonconforming zoning conditions (for ADU questions, state law constraints may apply).
• DelMar_ZoningCode.md
• 2025 California ADU handbook.md

• Official Del Mar code library