Sacramento County — Nonconforming Uses

Last reviewed: July 6, 2026

Overview

In the unincorporated areas of Sacramento County, “nonconforming” means a legally established use, structure, or lot that no longer meets today’s zoning rules but may continue under strict limits. The Sacramento Zoning Code (SZC) centralizes these rules in the Nonconformance article, covering how long a use may continue, when it is deemed discontinued, what repairs are allowed, and how to seek a Certificate of Nonconforming Use. Start with the County’s high-level zoning & planning overview, then drill into the SZC’s nonconforming standards summarized below.

Core rule: A legal nonconforming use may continue for five years and, thereafter, only with a Certificate of Nonconforming Use; it cannot expand, cannot change to another nonconforming use, and if discontinued for more than 90 days, it generally cannot restart (§ 1.9.3.A; continuation beyond five years via § 1.9.3.E and § 6.5.2)

What counts as nonconforming in unincorporated Sacramento County

• Intent and scope. The SZC recognizes nonconforming lots, structures, and uses and seeks to eliminate them over time; they cannot be enlarged except under limited provisions (§ 1.9.1.A) .
• Legal status. Uses with valid permits or variances under prior code remain legal nonconforming (§ 1.9.1.C) .
• How nonconformance arises. If an otherwise lawful use is no longer allowed, or a lawful structure/lot no longer meets standards after code changes, it becomes nonconforming (§ 1.9.1.D) .

Continuation, discontinuance, and limits on change/expansion

• Five-year continuation + certificate thereafter. Nonconforming uses may continue for five years; beyond that, a Certificate of Nonconforming Use or a Zoning Verification Letter is required (§ 1.9.3.A, § 1.9.3.E) .
• No expansion or extension. Nonconforming uses cannot expand or extend on the same or adjoining land (§ 1.9.3.A.1) .
• No change to another nonconforming use. Any change must be to a conforming use for the district (§ 1.9.3.A.2) .
• Discontinuance (90 days). If discontinued for more than 90 days (including vacancy or lapse of business license), use cannot restart unless reinstated per § 6.5.2 by the Planning Commission (§ 1.9.3.A.3) .
• Stricter limits on bare-land uses. If the nonconforming use involves no buildings (or only very low-value accessory buildings ≤ $1,000 replacement cost), it must be discontinued immediately (§ 1.9.3.B) .
• Distance-based nonconformance. Uses made nonconforming by a newly failing distance separation may continue but cannot expand or change, and discontinuance >90 days ends the right to continue (§ 1.9.3.F) .
• Business license revocation. If a required general or special business license is revoked/terminated/denied, the nonconforming use must cease (§ 1.9.3.A.5, as numbered in the code text) .

Certificates of Nonconforming Use and Zoning Verification Letters

• Certificate purpose and authority. A Certificate of Nonconforming Use allows continuation beyond the five-year window; the Planning Director is the default decision-maker, with the Planning Commission deciding reinstatements after discontinuance (§ 6.5.2.A–C) .
• Key findings. Among required findings: the use was made nonconforming by a Board-adopted rezoning or code amendment; no enforcement actions are pending; required distance separations are met (with limited exceptions); and any required business license has been continuously held (§ 6.5.2.D) .
• Conditions and term. Certificates may be conditioned (including time limits) and may be revoked per § 6.4.1.G; lapses occur if discontinued for 90 days unless otherwise specified. Special termination rules apply to massage establishments (§ 6.5.2.D–F; see also § 1.9.3.O) .

Repair, enlargement, relocation, and restoration of nonconforming structures

• Routine work cap. In any 12 months, maintenance/repair/modification of a nonconforming structure cannot exceed 25% of current replacement cost; no increase in the nonconforming portion or in habitable area (§ 1.9.4.A) .
• Limited enlargements. Additions may proceed if they do not expand/enlarge/change the nonconformity and otherwise meet district rules; minor, design-driven “insignificant” exterior adjustments may be allowed (§ 1.9.4.B) .
• Relocation. Moving a nonconforming building on-site or to another lot is prohibited unless it will fully conform after the move (§ 1.9.4.C) .
• Restoration after damage. If alteration/damage/partial destruction is ≤50% of value, you may restore and continue the use if work starts within one year and is diligently pursued; if >50%, full conformance is required. Special exception applies to the Natural Streams district (§ 1.9.4.D) .
• Existing residences in nonresidential zones. A legally established single-family or duplex in Commercial, Industrial, IR, or O zones may be completely restored or rebuilt if current residential development standards are met (§ 1.9.4.F) .

Off-street parking and nonconformity

• Additional parking required upon enlargement. If a building has insufficient parking or none at all, you cannot enlarge or intensify (e.g., add dwellings, seats, floor area) unless you provide the additional parking the code requires (§ 1.9.3.C) . Coordinate with Parking.

Special nonconforming categories frequently encountered

• Mobile homes. Certain long-standing mobile home occupancies may continue; replacement is allowed on small parcels if architectural standards are met (§ 1.9.3.D) .
• Convenience stores. Older convenience stores/ancillary food markets meeting date-based criteria are treated as permitted and may operate regardless of hours or proximity to schools/residential, subject to documentation and compliance timelines (§ 1.9.3.J) .
• Cardrooms and adult bookstores. Continuation is allowed under tailored rules (§ 1.9.3.K–L) .
• Recycling facilities. Nonconforming recycling facilities could continue for one year after the 2015 amendment; beyond that, they are illegal and subject to abatement unless a Certificate is secured as outlined (§ 1.9.3.M) .
• Massage establishments. After the 2025 amendment, ongoing nonconforming massage businesses face specific certificate timelines and license-lapse triggers for termination (§ 1.9.3.O; § 6.5.2.F) .

Nonconforming lots in residential districts

• “Lots nonconforming upon creation” (RD). Certain RD lots created out of conformance can still be treated as nonconforming if they meet strict criteria (e.g., minimum 3,000 sf; public water/sewer; dwelling date/permit) (§ 1.9.1.F) .
• Nonconforming lots of record (residential). A single-family dwelling may be built on an undersized interior lot recorded before July 11, 1956, if yards and utilities comply (§ 1.9.2.A); similar relief applies to lots lacking full public street frontage if access standards are met (§ 1.9.2.B) .
• RD-10 duplex on substandard lots. In RD-10, a duplex may be built on legal lots not meeting minimum area, subject to Planning Director design review and utility/yard compliance (§ 1.9.2.H) .

Nonconforming signs

• General rule. Nonconforming signs may continue for five years, after which they are illegal and abated; certain conversions or permits can address directory-pole and off-site sign situations (§ 1.9.5.C–H) . See Signage.

District-by-district: how nonconformity shows up where it matters

Use districts in Sacramento County are established in the SZC; see Zoning and Development Standards for the base rules. The nonconforming provisions below apply in unincorporated areas only.

Residential (RD) districts

• What’s most relevant to nonconformity:
  • Nonconforming RD lots may still be buildable under § 1.9.1.F and § 1.9.2.A–B (recording date, utilities, yards) .
  • In RD-10, a duplex can be approved on substandard-area lots with Planning Director design review (§ 1.9.2.H) .
  • If a single-family/duplex sits in a nonresidential zone (e.g., O/IR/Commercial/Industrial), it may be completely restored or rebuilt per § 1.9.4.F (using current residential standards) .
• Typical permitted uses and dimensional standards: Selected single-family/duplex lot dimensions appear in Table 5.7.A (e.g., minimum interior lot sizes and widths in RD-1 through RD-10) (§ 5.7, Table 5.7.A) . For full RD standards, see Development Standards.
• Where it applies: All unincorporated RD zones.

Commercial districts (e.g., LC, GC, SC; BP noted in use standards)

• What’s most relevant to nonconformity:
  • Existing residential in commercial zones may be fully rebuilt under § 1.9.4.F (current residential standards apply) .
  • Certain older convenience stores/food markets function as permitted uses with documentation (§ 1.9.3.J) .
• Purpose/typical permitted uses/dimensional standards: Not found in retrieved materials.
• Where it applies: Unincorporated commercial zones where these uses exist.

Industrial districts (Industrial) and Industrial Reserve (IR)

• What’s most relevant to nonconformity:
  • Existing single-family/duplex in Industrial or IR zones may be completely restored or rebuilt per § 1.9.4.F (current residential standards) .
• Purpose/typical permitted uses/dimensional standards: Not found in retrieved materials.
• Where it applies: Unincorporated industrial and IR zones.

Office (O) district

• What’s most relevant to nonconformity:
  • Existing single-family/duplex in O zones may be rebuilt under § 1.9.4.F with current residential standards .
• Purpose/typical permitted uses/dimensional standards: Not found in retrieved materials.
• Where it applies: Unincorporated O zones.

Agricultural (AG) and Agricultural-Residential (AR) districts

• What’s most relevant to nonconformity:
  • Nonconforming signs for uses continuing under § 1.9.3.B may require a Use Permit in Agricultural and Agricultural-Residential zones (§ 1.9.5.C.1) .
• Purpose/typical permitted uses/dimensional standards: Not found in retrieved materials.
• Where it applies: Unincorporated AG/AR zones.

Interim districts (Interim Agricultural Holding, Interim Agricultural, Interim Estate, Interim Residential, Interim Residential Townhouse)

• What’s most relevant to nonconformity:
  • Nonconforming signs tied to nonconforming uses beyond five years may require a Use Permit if now located in these interim zones (§ 1.9.5.C.1) .
• Purpose/typical permitted uses/dimensional standards: Not found in retrieved materials.
• Where it applies: Unincorporated interim zones; see Overlay Districts if combined layers also apply.

Natural Streams zoning district

• What’s most relevant to nonconformity:
  • Restoration rules for nonconforming structures exclude those within the Natural Streams zone (§ 1.9.4.D) .
• Purpose/typical permitted uses/dimensional standards: Not found in retrieved materials.
• Where it applies: Mapped Natural Streams district in unincorporated areas.

Special Sign Corridors

• What’s most relevant to nonconformity:
  • Nonconforming sign rules apply countywide and in Special Sign Corridors (§ 1.9.5.A–B) .
• Purpose/typical permitted uses/dimensional standards: Not found in retrieved materials.

Decision-relevant rules at a glance

Checklist

• Confirm the use/structure/lot was legally established (permits/variance history) (§ 1.9.1.C–D) .
• Determine if the five-year continuation window has run; if so, prepare a Certificate of Nonconforming Use application or request a Zoning Verification Letter, if eligible (§ 1.9.3.E; § 6.5.2.A–C) .
• Verify the use has not been discontinued for 90+ days; if it has, consider seeking reinstatement from the Planning Commission (§ 1.9.3.A.3; § 6.5.2.C.3) .
• Document no expansion or change to another nonconforming use (§ 1.9.3.A.1–2) .
• If proposing repairs/modifications, quantify the 25% replacement-cost cap and confirm no increase in nonconforming portion/habitable area (§ 1.9.4.A) .
• If damaged, evaluate the 50% restoration threshold and one-year start requirement (§ 1.9.4.D) .
• Check parking: enlargements/intensifications require code-compliant parking (§ 1.9.3.C; see Parking) .
• If within a sign corridor or posting signs for a nonconforming use, plan for five-year limits and potential permits (§ 1.9.5.C–H) .
• If in a mapped overlay (e.g., Natural Streams) or specialized area, confirm any added limits; consult Overlay Districts.
• Coordinate any discretionary review noted in the code (e.g., RD-10 duplex needs Planning Director design review) (§ 1.9.2.H) .

Risks & Ambiguities

Plain-English Summary

If your use, building, or lot in unincorporated Sacramento County was legal when created but no longer matches today’s zoning, you may keep using it under tight rules: don’t expand it, don’t switch to another nonconforming use, and don’t let it sit idle for more than 90 days. After five years, you need County approval (a Certificate) to keep going, and any big repairs or post-damage rebuilding can trigger requirements to meet current code.

Source References

• Sacramento Zoning Code — Nonconformance: § 1.9.1.A–D, F (intent; legal status; lots nonconforming upon creation)
• Sacramento Zoning Code — Nonconforming Lots of Record: § 1.9.2.A–B, H; § 1.9.2.F–G (RD-10 duplex; agricultural zone transitions)
• Sacramento Zoning Code — Nonconforming Use of Land or Buildings: § 1.9.3.A–C, E–F, J–O (continuation, discontinuance, parking, distance limits, specific uses)
• Sacramento Zoning Code — Nonconforming Buildings/Structures: § 1.9.4.A–F (repair cap, enlargement, relocation, restoration thresholds, residential rebuilds)
• Sacramento Zoning Code — Nonconforming Signs: § 1.9.5.A–H (five-year continuation, abatement, exceptions)
• Sacramento Zoning Code — Certificates: § 6.5.2.A–F (purpose, findings, termination; appeals)
• Development Standards — RD lot metrics: § 5.7, Table 5.7.A (selected lot area/width references)
• See County topics for context: Sacramento County Zoning, Sacramento County Development Standards, Sacramento County Parking, Sacramento County Design Review, Sacramento County Overlay Districts, Sacramento County Signage, Sacramento County Variances and Exceptions, California Building Standards Code

Retrieved passages

• Sacramento County Zoning Code (Section 1.9) High relevance show source text
• Sacramento County Zoning Code (Section 5.4.4) High relevance show source text
• Sacramento County Zoning Code (Section 1.9) High relevance show source text
• Sacramento County Zoning Code (Section 1.9.3.) High relevance show source text
• Sacramento County Zoning Code (Section 1.9.2.E.1.a) High relevance show source text
• Sacramento County Zoning Code (Section 4.06.230) High relevance show source text
• Sacramento County Zoning Code (Section 1.9.4.) High relevance show source text
• Sacramento County Zoning Code (Section 1.9.3.F) High relevance show source text
• Sacramento County Zoning Code (Section shall) Medium relevance show source text
• Sacramento County Zoning Code (§5097.97) Medium relevance show source text

Cited sections

• Sacramento Zoning Code — Nonconformance: **§ 1.9.1.A–D, F** (intent; legal status; lots nonconforming upon creation) (§ 1.9.1.A)
• Sacramento Zoning Code — Nonconforming Lots of Record: **§ 1.9.2.A–B, H; § 1.9.2.F–G** (RD-10 duplex; agricultural zone transitions) (§ 1.9.2.A)
• Sacramento Zoning Code — Nonconforming Use of Land or Buildings: **§ 1.9.3.A–C, E–F, J–O** (continuation, discontinuance, parking, distance limits, specific uses) (§ 1.9.3.A)
• Sacramento Zoning Code — Nonconforming Buildings/Structures: **§ 1.9.4.A–F** (repair cap, enlargement, relocation, restoration thresholds, residential rebuilds) (§ 1.9.4.A)
• Sacramento Zoning Code — Nonconforming Signs: **§ 1.9.5.A–H** (five-year continuation, abatement, exceptions) (§ 1.9.5.A)
• Sacramento Zoning Code — Certificates: **§ 6.5.2.A–F** (purpose, findings, termination; appeals) (§ 6.5.2.A)
• Development Standards — RD lot metrics: **§ 5.7, Table 5.7.A** (selected lot area/width references) (§ 5.7)
• See County topics for context: Sacramento County Zoning, Sacramento County Development Standards, Sacramento County Parking, Sacramento County Design Review, Sacramento County Overlay Districts, Sacramento County Signage, Sacramento County Variances and Exceptions, California Building Standards Code
• SacramentoCounty_ZoningCode.md

• Official Sacramento County code library