Local zoning · Tracy

Tracy — Nonconforming Uses

Q: If my nonconforming house is damaged, can I rebuild it the same way?

If the Building Official determines damage is 50% or less , the structure may be restored and the nonconforming use resumed provided restoration starts within six months and proceeds diligently; if damage exceeds 50%, restoration is not allowed except in full conformity with current zoning. § 10.08.3410 .

Nonconforming Uses under the Tracy local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

Tracy’s zoning code defines and controls nonconforming uses, nonconforming structures, and nonconforming lots in Article 25 of Chapter 10.08. The ordinance permits continued operation of lawfully established uses or structures that no longer meet current zoning rules, but it strictly limits enlargement, re‑establishment after abandonment, and major structural alterations; restoration after destruction is also constrained by measured thresholds. For development questions where site changes touch setbacks, development standards, parking, or design detail consult the city guides on those topics (see Tracy Development Standards, Tracy Parking, and Tracy Design Review) before assuming any enlargement is allowed.

Key controlling sections include § 10.08.3330 (definition/purpose), § 10.08.3370–3380 (alterations/additions), § 10.08.3390–3410 (change, abandonment, restoration), and the zone‑group limitation in § 10.08.3430; see the Source References for the exact citations and text sources.

(First mentions: link to related topics inline — Tracy Development Standards, Tracy Parking, Tracy Design Review, Tracy Overlay Districts, Tracy ADUs, California Building Standards Code.)

What the Tracy code says — short synthesis (by topic)

Definition / intent — A nonconforming use is a use lawfully established but not allowed under current zone regulations; a nonconforming structure is lawfully built but fails current coverage, yard, height, or spacing rules. The Article is expressly aimed at limiting the number and extent of such nonconformities. § 10.08.3330; § 10.08.3340.
Continuation and maintenance — Nonconforming uses and structures may be continued and maintained but are subject to the limitations in Article 25 (continuation rules). § 10.08.3360.
Enlargement / expansion — Expansion of a nonconforming use is treated as a conditional use requiring a use permit (i.e., discretionary approval). Absent a use permit, structures housing nonconforming uses generally may not be moved, enlarged, or altered in a way that increases nonconformity; a nonconforming use may increase its volume of operation only if the structure is not altered or enlarged to accommodate it. § 10.08.3370 (a)–(b)(1)–(4).
Nonconforming structures (construction limits) — Nonconforming structures may not be altered, moved, enlarged, or reconstructed unless the alteration brings the structure into compliance with minimum district standards — however an extension that does not increase the existing level of nonconformity may be permitted subject to review and approval by the Community Development Director (and Fire Chief when relevant). § 10.08.3380.
Change of use — A nonconforming use may only be changed to a conforming use. § 10.08.3390.
Abandonment — If a nonconforming use is abandoned or discontinued for a continuous period of six (6) months, it cannot be reestablished; subsequent use must conform to zone regulations. § 10.08.3400.
Destruction and restoration — If a nonconforming structure is damaged ≤ 50% (as determined by the Building Official) it may be restored and the nonconforming use resumed if restoration begins within six months and proceeds diligently; if damage exceeds 50% the structure cannot be restored or the use resumed unless fully brought into conformity. § 10.08.3410.
Public utilities — The nonconforming rules do not prevent expansion, repair, modernization, or rebuilding of public utility structures so long as there is no change of use or area used; a site plan is required. § 10.08.3420.
Zone‑group limitation — Uses lawfully existing in any residential zone on October 16, 1975, are not to be treated as nonconforming in other residential zones, and similar cross‑zone exceptions apply among commercial and industrial zones; this is a narrow provision applicable only to elimination of nonconforming uses. § 10.08.3430.

District‑by‑district implications (what to watch for in each Tracy zone)

Note: where the Tracy code text for a district is not present in the retrieved files, I state "Not found in retrieved materials." Always verify specifics with the Community Development Department for parcel‑level determinations.

LDR (Low Density Residential)

Purpose: pedestrian‑scale low density residential (explicit purpose and standards in the code). § 10.08.1230–1260.
Typical permitted uses: single‑family dwellings and accessory uses (see full use groups in the code). Not found: a full use table in retrieved materials.
Key dimensional standards (decision‑relevant): maximum height 2½ stories / 35 ft, maximum lot coverage 45%, off‑street parking requirements per Article 26. § 10.08.1230; § 10.08.1240; § 10.08.1250.
Nonconforming implications: a nonconforming dwelling or accessory building may be maintained subject to Article 25 limits (alteration limited unless it reduces nonconformity). For accessory dwelling units see state ADU rules and local ADU policies (Tracy ADUs; California ADU law). Not found: local exceptions to nonconforming ADU treatment beyond Article 25. § 10.08.3340; § 10.08.3380.

CBD (Central Business District)

Purpose: provide pedestrian‑oriented retail, service, offices and high‑density residential near downtown. § 10.08.2360–2370.
Typical permitted uses: broad commercial, business, office, and high‑density residential uses (specific use groups listed in § 10.08.2380).
Key dimensional standards: descriptive regulations and special downtown rules (see Article 18 for full standards). Not found in retrieved materials: a single numeric table for CBD setbacks or lot coverage.
Nonconforming implications: buildings in CBD that lack required off‑street parking are not automatically nonconforming solely on that basis per parking exceptions; enlargement rules under Article 25 still apply. § 10.08.3470; § 10.08.3370.

AMO (Aggregate/Mining Overlay or similar)

Purpose/uses: AMO governs surface mining and related activities; many underlying uses are conditional. § 10.08.4870 and related text.
Key standards (for surface mining): minimum lot area 5 acres, lot width ≥ 200 ft, yards 50 ft except for excavation/reclamation approved plans; off‑street parking and buffering standards apply. § 10.08.4870(a)–(f).
Nonconforming implications: mining operations lawfully existing before ordinance changes may be treated as nonconforming but continue under Article 25 subject to buffers and CUP requirements. Not found: explicit AMO nonconforming clause beyond Article 25 general rules. § 10.08.3350 et seq.

M-1 / M-2 (Industrial Zones)

Purpose/uses: industrial/manufacturing uses; M‑zones are referenced in the mining and AMO text. § 10.08.4870 and elsewhere.
Nonconforming implications: the cross‑zone rule in § 10.08.3430 treats uses lawfully existing within industrial zones as not nonconforming across industrial zones as of Oct 16, 1975 — narrow historic rule. § 10.08.3430.

RE, MDC, MDR, HDR, PUD

These zone labels appear in Tracy’s code (for example childcare/daycare allowances reference them). Specific standards for each zone were not retrieved in full here. See Tracy Land Use and Tracy Zoning for parcel‑level standards and permitted use tables. Not found in retrieved materials: complete per‑zone use tables for each of these zones in the files provided. § 10.08.3195 (day care homes permitted in RE, LDR, MDC, MDR, HDR, PUD).

GHC / HS (Special zones referenced as commercial equivalents)

The code treats GHC and HS as commercial zones for the limited purpose of the zone‑group nonconformance rule. § 10.08.3430.

Most decision‑relevant standards (quick reference table)

Topic	Short rule	Code Reference
Definition — nonconforming use	Lawful use that no longer conforms to zone	§ 10.08.3330
Definition — nonconforming structure	Lawful structure that fails current coverage/yard/height/spacing rules	§ 10.08.3340
Expansion of nonconforming use	Expansion requires a use permit (conditional use)	§ 10.08.3370(a)
Alterations to nonconforming structures	May not be altered/moved/enlarged so as to increase nonconformity; limited enlargements allowed if they do not increase nonconformity and are approved by Director/Fire Chief	§ 10.08.3380
Change of use	Only to a conforming use	§ 10.08.3390
Abandonment period	Continuous 6 months = loss of nonconforming status	§ 10.08.3400
Restoration after damage	Repair allowed if ≤50% damaged and restoration started within 6 months; >50% must conform	§ 10.08.3410
Utility structures exception	Utilities may expand/modernize even if nonconforming (no change/use or area increase) with site plan	§ 10.08.3420
Historic zone‑group exception	Uses lawful on Oct 16, 1975 not nonconforming across same zone group	§ 10.08.3430

Checklist — what an applicant must satisfy (practical)

Confirm the use or structure was lawfully established (provide grant deed/building permit records). Verify whether it is a nonconforming use or structure under § 10.08.3330 / § 10.08.3340.
If proposing enlargement/expansion of a nonconforming use, prepare a conditional use (use permit) application and show how the expansion meets CUP criteria per § 10.08.3370(a).
If altering a nonconforming structure, document that the alteration will not increase the level of nonconformity (or otherwise bring it into conformity) and obtain Director/Fire Chief approvals as required by § 10.08.3380.
If the use was discontinued, confirm the period of activity to ensure it has not been abandoned for 6+ months per § 10.08.3400.
If the structure was damaged, obtain Building Official’s damage percentage determination and start restoration within six months if ≤50% per § 10.08.3410.
For public utilities, prepare a site plan and coordinate required public improvements as allowed by § 10.08.3420.
Cross‑check off‑street parking and landscaping impacts of any proposed change against Tracy Parking and Landscaping and Screening rules; existing parking conditions are specifically addressed by § 10.08.3470.

Risks & Ambiguities

Issue	Why it matters	What to verify
Damage threshold for restoration (50%)	A >50% damage determination forces full compliance with current zone rules; loss of nonconforming rights is expensive	Ask Building Official for a formal damage estimate and get the written finding per § 10.08.3410.
What counts as “enlargement” or “increase in nonconformity”	Projects that increase interior capacity without changing footprint may still be limited; ambiguity can cause enforcement	Document proposed physical changes; cite § 10.08.3370(b)(4) (volume increases allowed only without structural change). Verify Director’s interpretation.
Abandonment determination	City can deem a use abandoned after 6 months; disagreements risk losing nonconforming status	Keep continuous operations evidence (leases, utility bills); confirm 6‑month rule § 10.08.3400.
Whether an old retail/industrial use qualifies under the 1975 zone‑group exception	Historic cross‑zone exceptions can preserve certain uses; applicability is narrow	Confirm whether the use and date meet § 10.08.3430 criteria and whether the GHC/HS classifications apply.
Interaction with ADU rules and State law	State ADU law limits local denial based on nonconforming zoning conditions, which can override some local practices	Check state ADU preemption and local ADU rules (California ADU law; Tracy ADUs). If applying for an ADU, verify which local nonconformance corrections the City may require. Not all ADU-related limits are in the retrieved materials.

Plain‑English summary

If your home, business, or structure in Tracy was lawfully built or used but no longer meets current zoning rules, you can generally keep using it — but you cannot expand the nonconforming part without a discretionary permit, you cannot switch it back after it’s been unused for six months, and if it’s mostly destroyed (over 50%) you will likely have to rebuild to current rules. Always confirm with the Community Development Director before starting work. § 10.08.3330–3410.

Source References

Tracy Municipal Code, Chapter 10.08, Article 25 (Nonconforming Structures and Uses): § 10.08.3330 – definition/purpose.
Tracy Municipal Code, Chapter 10.08: § 10.08.3340 (nonconforming structures).
Tracy Municipal Code, Chapter 10.08: § 10.08.3350–3360 (open land continuation; continuation & maintenance).
Tracy Municipal Code, Chapter 10.08: § 10.08.3370–3380 (alterations/additions to nonconforming uses and structures).
Tracy Municipal Code, Chapter 10.08: § 10.08.3390–3410 (change of use, abandonment, restoration).
Tracy Municipal Code, Chapter 10.08: § 10.08.3420–3430 (public utility exception; zone‑group limitation).
Tracy Municipal Code, Chapter 10.08: § 10.08.1230–1260 (LDR dimensional standards cited as examples).
Tracy Municipal Code, Chapter 10.08: § 10.08.2360–2380 (CBD zone purpose and permitted groups).
Tracy Municipal Code, Chapter 10.08: § 10.08.4870 (AMO / surface mining development standards referenced).
Tracy Municipal Code, Chapter 10.08: § 10.08.3195; § 10.08.3194 (day care home allowance; tobacco retail nonconforming language referencing Article 25).
Parking exceptions (existing buildings): § 10.08.3470.

Also consult the Tracy site menu pages for related local topic guidance (links used above inline): Tracy Zoning, Tracy Land Use, Tracy Development Standards, Tracy Parking, Tracy Design Review, Tracy Overlay Districts, Tracy ADUs; and state codes for ADUs and building standards (California ADU law; California Building Standards Code).

Sources

Retrieved passages

Tracy Zoning Code (§ 10-2.2504) High relevance
Tracy Zoning Code (Article 25.) High relevance
Tracy Zoning Code (§ 10-2.2503) High relevance
Tracy Zoning Code (§ 10-2.2506) High relevance
Tracy Zoning Code (Article 25) High relevance
Tracy Zoning Code (section 10.12.320) Medium relevance
Tracy Zoning Code (Article 25) Medium relevance
Tracy Zoning Code (§ 1) Medium relevance

Cited sections

Official Tracy code library

Frequently asked questions

What is a nonconforming use in Tracy?

A nonconforming use in Tracy is a use that was lawfully established but that no longer conforms to the current use regulations for the zone in which it is located; this definition and the Article’s intent to limit expansions are in § 10.08.3330.

Can I expand a nonconforming business or convert part of a building to a larger nonconforming use?

Not without a discretionary approval: expansion of a nonconforming use is treated as a conditional use requiring a use permit; absent a use permit, structures with nonconforming uses may not be moved, altered or enlarged in a way that increases the nonconformity. § 10.08.3370.

If my nonconforming house is damaged, can I rebuild it the same way?

If the Building Official determines damage is 50% or less, the structure may be restored and the nonconforming use resumed provided restoration starts within six months and proceeds diligently; if damage exceeds 50%, restoration is not allowed except in full conformity with current zoning. § 10.08.3410.

How long can a nonconforming use sit idle before it’s lost?

If a nonconforming use is discontinued or abandoned for a continuous period of six (6) months, it cannot be reestablished and the property must thereafter conform to the zoning regulations. § 10.08.3400.

Are there exceptions for public utilities or mining?

Yes. Public utility structures may be repaired, modernized, or rebuilt even if nonconforming provided there is no change of use or increase in area used and a site plan is submitted (§ 10.08.3420). Surface mining is governed by its development standards (e.g., § 10.08.4870) and remains subject to buffers and conditional permit rules.

Does Tracy treat historically lawful uses across residential/commercial/industrial groups differently?

There is a narrow historic rule: uses lawfully existing in any residential zone on October 16, 1975 shall not be considered nonconforming within residential zones (similarly for commercial and industrial groups); the provision is limited to elimination of nonconforming uses § 10.08.3430. Verify applicability for any specific use.

If I propose an ADU on a lot with nonconforming zoning conditions will Tracy deny it?

State ADU law places limits on denial for nonconforming zoning conditions; local ADU rules also apply. Check Tracy’s ADU rules and the state provisions — some ADU denials for zoning nonconformance are preempted by state law. Not all ADU‑specific guidance on nonconformance is in the retrieved Tracy materials; confirm with the City. Not found in retrieved materials: a Tracy‑specific rule that fully resolves all ADU/nonconformance interactions.

Where can I find the numeric setback, coverage, and height standards I need for conformity?

Look up the specific zone in Tracy’s zoning tables and the Development Standards pages; for example, the LDR zone cites 2½ stories / 35 ft height and 45% lot coverage in § 10.08.1230–1240, but full zone tables live in the zoning articles. § 10.08.1230–1240.

Does lack of off‑street parking make a building nonconforming?

No — the code explicitly states that an existing building is not deemed nonconforming solely because it lacks off‑street parking as of the ordinance date; however changes to the building may trigger additional parking requirements. § 10.08.3470.

Who decides ambiguous nonconforming questions (e.g., abandonment, enlargement interpretation)?

The Community Development Director (and in some cases the Planning Commission or the Building Official) make determinations; discretionary expansion requires a use permit reviewed under the CUP processes. See § 10.08.3370 and related permit articles for process detail.

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