Pleasanton — Nonconforming Uses

Last reviewed: July 2, 2026

Overview

Pleasanton regulates nonconforming uses, structures, lots and signs in Chapter 18.120 Nonconforming Uses of the Pleasanton Zoning Code (Title 18). The chapter preserves lawful pre‑existing uses and structures while limiting enlargement, re‑establishment after abandonment, and restorative rebuilding above stated damage thresholds; it also imposes specific amortization or alteration timeframes via Table 18.120.060. See Chapter 18.120 (§ 18.120.010 – § 18.120.080) for the controlling text .

Note: this page covers only Pleasanton’s zoning provisions on nonconformities (Chapter 18.120 and Table 18.120.060) — it does not interpret California building code or tenant/landlord law. For building-code issues consult the California Building Standards Code. For related Pleasanton topics mentioned below, see the local pages on parking, design review, ADUs, overlay districts, development standards, signage, and variances and exceptions.

Chapter and key authorities

• Chapter 18.120 Nonconforming Uses (§ 18.120.010 – § 18.120.080) — general definitions, prohibitions, and procedural rules .
• Table 18.120.060 — schedules for removal/alteration and amortization timing for categories of nonconforming features .

What Pleasanton’s code actually requires (plain‑English, code‑grounded)

• A use or structure that lawfully existed on the effective date of the zoning ordinance (or later amendment) but no longer conforms is a nonconforming use or nonconforming structure and may be continued only as allowed by Chapter 18.120 (§ 18.120.010–.080) .
• Enlargement / extension: Nonconforming uses may not be enlarged or extended to occupy additional area or to displace conforming uses; nonconforming structures may not be moved, altered or enlarged in a way that increases the degree of nonconformity, except where alteration eliminates nonconformity or where the code expressly allows limited residential enlargements in specific districts (see below) .
• Repairs and maintenance: Routine maintenance and repairs are allowed on nonconforming uses and structures (routine upkeep is explicitly permitted) .
• Destruction / replacement: If a nonconforming structure is destroyed by fire or calamity to 50% or less of its value, it may be restored and the use resumed if restoration begins within one year and proceeds diligently; if destroyed more than 50% it generally cannot be reconstructed to its prior nonconforming condition (see the damage threshold and restoration rules) .
• Abandonment: A nonconforming use that is abandoned, discontinued, or changed to a conforming use for a continuous period of 90 days generally may not be reestablished (special exceptions apply for some downtown overlay exceptions and for dwelling units) .
• Public‑health / nuisance limits: Nonconforming uses that violate noise, odor, emissions, vibration, insect nuisance or similar standards may not be enlarged or have equipment replaced unless the change eliminates the nonconformity; the city can require compliance with such performance standards within specified timeframes in Table 18.120.060 .
• Amortization and removal schedules: Specific nonconforming items (fences, small signs, structures under a valuation threshold, skateboard ramps, etc.) have maximum cure or removal periods listed in Table 18.120.060; certain removals or compliance dates are set case‑by‑case by city council where the table marks an asterisk .
• Notification & enforcement: The zoning administrator identifies nonconforming uses subject to removal or alteration and must notify owners; deadlines and any required hearings follow the timetable and procedures referenced in the code (see the table and Section 18.12.040 notice rules) .
• Variances / conditional relief: Variances or conditional use procedures may provide routes to alter or extend certain nonconforming conditions in limited circumstances (see Chapter 18.124 and Chapter 18.132 for variance authority) .

District‑by‑district practical breakdown (Pleasanton zoning districts with direct references)

Below are Pleasanton districts that appear in the nonconforming provisions and other code places; each subsection gives the code‑stated role or where the district is referenced in nonconforming rules and what the retrieved materials show about permitted uses/dimensions. Where the local code text needed to answer a subitem was not present in the retrieved files, the entry says so and advises verification.

Note: the full detailed permitted‑use tables and dimensional standards for each district live elsewhere in Title 18; cross‑check the specific district chapter and the Pleasanton Development Standards page for parcel‑level numbers. Verify with the jurisdiction for parcel‑specific determinations.

A (Agricultural)

• Purpose / where referenced: A district is referenced as one of the districts where a structure housing a nonconforming residential use may be altered or enlarged without increasing number of dwelling units (the allowance for residential alteration lists A, R, O, MU or C in the nonconforming chapter) .
• Typical permitted uses: agricultural and accessory residential uses (the full use list is in the A district chapter of Title 18 — not reproduced in the nonconforming chapter).
• Key dimensional standards: Not found in the retrieved nonconforming materials — see the district chapter and Pleasanton Development Standards. Verify with the jurisdiction.

R‑1 (Single‑family residential)

• Purpose / where referenced: R‑1 is explicitly discussed in the code in multiple places (e.g., sign rules and conditional uses); the nonconforming chapter allows certain residential structure enlargements in R districts under limits and exempts nonconforming dwelling units from the 90‑day abandonment bar in some cases .
• Typical permitted uses: single‑family dwellings, home occupations, small accessory uses (see the R‑1 district chapter) .
• Key dimensional standards: Not specified in the retrieved nonconforming snippets; site‑specific setbacks, lot coverage and height limits are in the district chapters and the Pleasanton Development Standards. Verify with the jurisdiction.

RM (Multi‑family residential)

• Purpose / where referenced: RM is listed among residential districts and is subject to the same nonconforming structure/use maintenance and enlargement restrictions; conditional temporary uses (e.g., Christmas tree lots) are referenced for RM in the general district text .
• Typical permitted uses: multi‑family dwellings, accessory uses, some institutional uses (see the RM chapter for full list) .
• Key dimensional standards: Not present in the nonconforming chapter excerpts; see district chapter and development standards.

MU (Mixed Use), C (Commercial) and O (Office)

• Purpose / where referenced: These commercial/mixed districts are listed where the nonconforming rules carve out limited exceptions for residential alterations, and in the Table 18.120.060 amortization categories for signs and structures (e.g., different timelines for nonconforming advertising signs depending on district type such as A, O, C, I, Q, P, S or PUD) .
• Typical permitted uses: retail, office, hospitality, mixed residential/commercial depending on the specific district chapter.
• Key dimensional standards: Not found in the nonconforming excerpts; see the district chapters and development standards.

I / I‑P (Industrial / Industrial‑Park)

• Purpose / where referenced: Industrial districts are referenced in the nonconforming chapter when the code requires certain nonconforming industrial uses to comply with performance standards for emissions/noise and in Table 18.120.060 (and the I versus I‑P distinction for compliance) .
• Typical permitted uses: industrial and light industrial uses per the I‑district chapter.
• Key dimensional standards: Not found in the nonconforming excerpts — consult the I district chapter and development standards.

S (Special study / S district)

• Purpose / where referenced: The S district is an interim district for study and may be reclassified; the code notes that uses lawfully on a site before an S designation do not automatically become nonconforming by reason of the S designation — relevant to nonconforming status determination .
• Typical permitted uses and dimensions: See the S district chapter (not reproduced here).

PUD and other overlays (e.g., downtown overlays)

• Purpose / where referenced: PUD and other overlay districts are named where the nonconforming removal/alteration timelines vary by district or where exceptions apply (downtown active ground‑floor use overlay has a special exception that affects the 90‑day abandonment rule) .
• For overlay‑specific rules consult the Pleasanton Overlay Districts page and the particular overlay chapter; verify how overlay rules interact with Chapter 18.120 on a parcel basis.

Quick reference table — most decision‑relevant nonconforming standards

Checklist (what an applicant or property owner should do before acting)

• Confirm whether the existing use/structure/sign was lawfully established before the current zoning standard (i.e., is it a legal nonconforming use/structure/sign?) — see Chapter 18.120 (§ 18.120.010–.080) .
• If contemplating repair, alteration, enlargement or replacement, check the alteration/enlargement prohibitions — do proposed changes increase the degree of nonconformity? If so, they are generally prohibited (§ 18.120.*) .
• If the structure was damaged, measure estimated repair cost vs. replacement cost to determine the 50% threshold and whether restoration is allowed; obtain a determination from the Community Development Director as required in the code .
• Review Table 18.120.060 for any amortization deadlines that apply to the nonconforming feature and calendar the required compliance date or prepare for a city‑council hearing where the table allows case‑by‑case action .
• Check abandonment history: if a nonconforming use has ceased for 90 days or more the use generally cannot be re‑established; confirm exceptions for dwelling units and downtown special exceptions .
• Consult the zoning administrator early (they make nonconforming determinations and will issue any notices) and, where necessary, determine whether a variance or conditional use (Ch. 18.124 / 18.132) is the appropriate remedy .
• If the issue involves signs, landscaping, or parking compliance, check the related chapters (sign rules and parking exceptions are cross‑referenced in Chapter 18.120) and the signage and parking pages.
• If the work triggers design changes, coordinate with the design review process early.

Risks & Ambiguities

Plain‑English summary

If your building or business in Pleasanton predates a zoning change and now doesn’t meet current rules, Chapter 18.120 Nonconforming Uses lets you keep and maintain it — but not expand it or rebuild it beyond certain limits. Small repairs and ordinary maintenance are allowed; if it’s more than half destroyed or the nonconforming use is abandoned for 90 days (exceptions apply), you may be required to bring the property into compliance or follow the amortization schedule in Table 18.120.060. Always confirm specifics with the zoning administrator and by checking Chapter 18.120 and the applicable district rules .

Source References

• Pleasanton Zoning Code — Chapter 18.120 Nonconforming Uses (§ 18.120.010 – § 18.120.080)
• Pleasanton Zoning Code — Table 18.120.060 (Removal or Alteration of Nonconforming Use) § 18.120.060
• Pleasanton Zoning Code — Alteration / enlargement / abandonment / maintenance provisions (nonconforming text fragments)
• Pleasanton pages for related topics: Pleasanton Zoning, Pleasanton Land Use, Pleasanton Development Standards, Pleasanton Parking, Pleasanton Design Review, Pleasanton Overlay Districts, Pleasanton Signage, Pleasanton Variances and Exceptions, Pleasanton ADUs, California Building Standards Code.

Retrieved passages

• Pleasanton Zoning Code (§ 2-10.34) High relevance show source text
• Pleasanton Zoning Code (chapter for) High relevance show source text
• Pleasanton Zoning Code (title for) High relevance show source text
• Pleasanton Zoning Code (§ 2-10.36) High relevance show source text
• Pleasanton Zoning Code (§ 2-10.37) High relevance show source text
• Pleasanton Zoning Code (§ 2-10.33) High relevance show source text
• Pleasanton Zoning Code (Section 18.124.070) High relevance show source text
• Pleasanton Zoning Code (chapter and) High relevance show source text

Cited sections

• Pleasanton Zoning Code — **Chapter 18.120 Nonconforming Uses (§ 18.120.010 – § 18.120.080)** (Chapter 18.120)
• Pleasanton Zoning Code — **Table 18.120.060 (Removal or Alteration of Nonconforming Use)** § 18.120.060 (§ 18.120.060)
• Pleasanton Zoning Code — Alteration / enlargement / abandonment / maintenance provisions (nonconforming text fragments) fileciteturn0file5
• Chapters referenced for process/relief: Chapter 18.124 (Conditional Uses) and Chapter 18.132 (Variances) — cross‑referenced in Chapter 18.120 fileciteturn0file1turn0file3 (Chapter 18.124)
• Pleasanton pages for related topics: Pleasanton Zoning, Pleasanton Land Use, Pleasanton Development Standards, Pleasanton Parking, Pleasanton Design Review, Pleasanton Overlay Districts, Pleasanton Signage, Pleasanton Variances and Exceptions, Pleasanton ADUs, California Building Standards Code.
• Pleasanton_ZoningCode.md
• 2025 California ADU handbook.md

• Official Pleasanton code library