Local zoning · Mariposa County

Mariposa County — Signage

Signage under the Mariposa County local zoning and planning code, with the controlling citations.

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Last reviewed: July 6, 2026

Overview

This page distills how signs are regulated in unincorporated Mariposa County under Title 17 Zoning. Countywide baseline rules for signs live in the supplementary standards, with zone-specific add‑ons in commercial districts and in overlays such as the Scenic Highway Overlay and Design Review areas . Use this alongside the broader Mariposa County zoning & planning overview, Zoning, and Development Standards.

Core rule in plain English: Every parcel in the unincorporated areas may have on‑site signs totaling up to 16 sq ft (max height 20 ft) by right, while off‑site signs are banned unless a specific zone allows them. Extra or different limits can apply in commercial zones and overlays (§ 17.108.190).

Countywide baseline standards (apply in all unincorporated areas)

  • The baseline sign standard is in § 17.108.190: on any parcel, a temporary or permanent on‑site sign(s) is allowed with a maximum aggregate area of 16 sq ft and a maximum height of 20 ft. Off‑site signs are prohibited unless the principal zone specifically permits them. County wayfinding signs are permitted on all parcels; signs on school district property are exempt from the County’s specific sign standards .
  • Small interior informational signs like “OPEN/CLOSED,” “VACANCY/NO VACANCY,” or “HOURS OF OPERATION” are allowed, up to 3 sq ft aggregate per business (a second entrance can add 3 sq ft, but no more than 3 sq ft visible from any point in the right‑of‑way). These must be inside the building and cannot display logos or products/services (§ 17.108.190) .
  • Illumination: signs may be lit if light does not spill onto streets or adjacent parcels or create hazards; no illumination after 11:00 p.m. or close of business (whichever is later) and not before 6:00 a.m. (§ 17.108.190) .
  • Prohibited sign types: moving/rotating signs; flashing/animated illumination (time/temperature allowed); “Stop/Look/Listen”-type mimicry; most portable signs; inflatable device signs; and signs extending above a building’s roof peak (§ 17.108.190) .
  • Political signs: countywide limits include a 32 sq ft maximum per sign; placement rules restrict rights‑of‑way and require removal within 10 days after the election. No outline tubing, flashing, or moving parts (§ 17.108.190.G) .
  • Gateway signs: only at designated County gateways, with a maximum area of 240 sq ft, a maximum height of 16 ft, external lighting only, and Board of Supervisors design review required before fabrication/installation (§ 17.108.190) .

Definitions you’ll see in permits and plan sets (found in § 17.148.010): “sign,” “off‑site sign,” “on‑site sign,” “temporary sign,” “wayfinding sign,” “illegal sign,” “nonconforming sign” (and note the “sign amortization period” entry is repealed) .

For broader plan checks that include sign locations/sizes on site plans, see the County’s submittal lists for commercial site plans (§ 17.08.150) and note that some projects require design review before signs are approved .

District-by-district and overlay specifics

Below are the districts and overlays that add or modify sign rules beyond the countywide baseline. Always check your base zone, then any applicable overlays. For district purposes and permitted uses, see Mariposa County Land Use.

CN-1 — Neighborhood Commercial Zone‑1 (Indoor) (§ 17.76.020)

  • Purpose/uses: Serves neighborhood‑scale commercial uses (e.g., antique/gift shops; small retail; services like banks, barbers, small animal clinics). Typical permitted uses are enumerated for CN‑1; parcels are generally 2.5 acres minimum unless served by public systems (then 1 acre) (§§ 17.76.020, 17.76.020(B); CN‑1 use list shown in CN‑1 text block) .
  • Key sign standards:
    • Aggregate sign area = 1 sq ft per linear foot of business frontage; max 32 sq ft. Corner/through buildings may split area, allowing up to 48 sq ft on the secondary frontage (§ 17.76.020) .
    • Signs must be integrated into building design and not extend above the roof peak; monument signs are allowed as an alternative/addition (§ 17.76.020) .
    • Centers (3+ tenants with a common name) may add one monument sign up to 32 sq ft and 6 ft tall, identifying the complex only (§ 17.76.020) .
    • “Large‑scale development” (≥10,000 sq ft GFA) may add +32 sq ft of building‑face signage; this large‑scale bonus is not stackable with certain other CN‑1 bonuses (§ 17.76.020) .

CN-2 — Neighborhood Commercial Zone‑2 (Indoor and Outdoor) (§ 17.80.020)

  • Purpose/uses: Similar to CN‑1 but also allows outdoor retail/services integral to the primary use; adds uses like food/beverage with or without fuel pumps, cafes, day care, auto rental, laundromats (§ 17.80.010; § 17.80.020) .
  • Key sign standards: “The standards for signs in the CN‑2 zone shall be as specified in § 17.76.020” (i.e., same as CN‑1) (§ 17.80.020) .

CG-1 — General Commercial Zone‑1 (§ 17.88.040)

  • Purpose/uses: General commercial; development is typically master‑planned via a CG plan. The design criteria section controls signage in relation to CN‑1.
  • Key sign standards:
    • CG‑1 adopts CN‑1 sign standards by reference, but increases two caps: per‑business maximum aggregate sign area up to 120 sq ft; and a center‑identification monument sign up to 64 sq ft (§ 17.88.040) .
    • Where phased, each phase must function independently; signage must comply within each phase (§ 17.88.050) .

CG-2 — General Commercial Zone‑2 (§ 17.92.040)

  • Purpose/uses: General commercial in a broader format; CG‑2 relies on the CG‑1 design criteria.
  • Key sign standards: CG‑2 applies the CG‑1 design criteria wholesale, so the same signage exceptions (e.g., 120 sq ft per business; 64 sq ft center monument) apply (§ 17.92.040) .

YWMU — Yosemite West Mixed‑Use Zone (§ 17.106.020)

  • Purpose/uses: Supports services for the vacation rental sector in Yosemite West; allows multi‑family, private office, self‑storage (private), maintenance support facilities, a primary and secondary residence, and visitor‑serving lodging types per County Code (§ 17.106.010; § 17.106.020) .
  • Key sign standards: Limit of three project signs per parcel; total signage not to exceed 50 sq ft; neon signs prohibited (§ 17.106.020) .

SHO — Scenic Highway Overlay (§ 17.65.010 and overlay standards)

  • Where it applies: Parcels visible from designated State or County scenic highways; SHO applies in combination with a principal zone.
  • Why it matters: The SHO requires a Scenic Highway Review Plan before installing any sign if the parcel is wholly or partially within the overlay and visible from the scenic highway (§ 17.65.010). Off‑site signs are expressly prohibited in the SHO; when overlay and base zone conflict, the more restrictive standard applies (§ 17.65.010) .
  • Selected SHO sign standards:
    • Home enterprise signs are capped at 16 sq ft (one per parcel). Other SHO standards still apply to those signs (§ 17.65; sign standards excerpt) .
    • SHO design criteria also push low monument forms and material/scale compatibility; in related corridor standards, all‑natural sign materials can unlock higher aggregate parcel signage (e.g., up to 120 sq ft per parcel for all‑natural signs; otherwise 64 sq ft) and political sign cross‑reference to § 17.108.190.G is given. Code anchor for these corridor standards appears within the SHO/related corridor design standards chapter (confirm applicability to your segment) .

DRO — Design Review Overlay (§ 17.66.010)

  • Where it applies: Areas mapped for visual cohesiveness or scenic quality; DRO is combined with the principal zone.
  • Why it matters: New or modified signs in a DRO area must demonstrate harmony with surrounding character during design review (§ 17.66.010). DRO doesn’t replace base zone standards; it adds a design review layer that can refine placement, materials, and scale for compatibility . See Mariposa County Overlay Districts.

HDRO — Historic Design Review Overlay (§ 17.67.010)

  • Where it applies: Historic districts (e.g., portions of the Mariposa Town Planning Area).
  • Why it matters: Exterior advertising displays require HDRO design review, and proposals must meet the Board‑adopted historic architectural themes and guidelines (§ 17.67.010). Signs are reviewed as part of building elevations and site design submittals . See Mariposa County Historic Preservation.

Decision‑relevant standards at a glance

Topic Standard (highlights) Where it applies Code Reference
Baseline on‑site sign Up to 16 sq ft aggregate; max height 20 ft; off‑site signs prohibited unless zone allows; wayfinding allowed All unincorporated parcels § 17.108.190
Illumination window No lighting after 11:00 p.m. or close of business (later of the two); shielded/no spill Countywide § 17.108.190
Prohibited types Moving/rotating; flashing/animated; inflatable; roof‑peak extensions; most portable Countywide § 17.108.190
Political signs Max 32 sq ft/sign; strict placement and timing; remove within 10 days after election Countywide § 17.108.190.G
Gateway signs 1 per designated gateway; max 240 sq ft; 16 ft height; external lighting only; BoS design review Designated County gateways § 17.108.190
CN‑1/CN‑2 business signs 1 sq ft/lf of frontage; max 32 sq ft (48 sq ft on secondary frontage); complex monument 32 sq ft/6 ft; +32 sq ft for large‑scale (≥10k sf) CN‑1; CN‑2 adopts CN‑1 § 17.76.020; § 17.80.020
CG‑1 business signs Uses CN‑1 rules but raises caps to 120 sq ft per business; complex monument 64 sq ft CG‑1 § 17.88.040
CG‑2 business signs Uses CG‑1 design criteria (same signage caps) CG‑2 § 17.92.040
YWMU parcel cap Max 3 signs/parcel; total ≤ 50 sq ft; neon prohibited Yosemite West Mixed‑Use § 17.106.020
SHO off‑site signs Off‑site signs prohibited; more restrictive SHO design standards prevail Scenic Highway Overlay § 17.65.010

Note: Illegal signs are a zoning violation and public nuisance; the Code cross‑references enforcement in § 17.144 (§ 17.108.190). “Amortization period” for signs is repealed in definitions (§ 17.148.010) . For build/structural requirements, see the California Building Standards Code (separate from zoning).

Practical tips for applications

  • In commercial projects, integrate sign sizing early with storefront width and frontage counts; CN/CG formulas scale to building frontage (§ 17.76.020; § 17.88.040) .
  • Overlays can change the outcome more than the base zone does. SHO bans off‑site signs and requires scenic review; DRO/HDRO require design review for signs to fit corridor/historic themes (§§ 17.65.010, 17.66.010, 17.67.010) .
  • Plan for site plan submittals to show sign locations, heights, and types with your broader site layout; see the County’s commercial/multifamily site plan content list (§ 17.08.150) and coordinate with Design Review if mapped .
  • If your site fronts a designated corridor with landscaping/screening requirements, match sign placement and materials with those corridor standards and your landscaping and screening plan; some corridors favor low monument forms and natural materials with defined aggregate caps (confirm corridor chapter applicability) .
  • Nonconforming or illegal signs trigger enforcement; if you’re replacing an old sign, check whether it’s “nonconforming” (legal but out of step with current code) or “illegal” (violative) before you assume it can remain (§ 17.148.010; § 17.108.190) . See Mariposa County Nonconforming Uses.

Checklist

  • Confirm your parcel’s base zone and whether SHO, DRO, or HDRO overlays apply (Zoning, Overlay Districts).
  • Size your on‑site sign(s) to the baseline or zone‑specific cap (e.g., 16 sq ft baseline; CN/CG frontage formulas; YWMU 50 sq ft total) (§§ 17.108.190, 17.76.020, 17.88.040, 17.106.020) .
  • Select form/materials consistent with corridor/overlay design expectations; avoid prohibited types (e.g., flashing, roof‑peak) (§ 17.108.190; SHO/DRO/HDRO chapters) .
  • Check lighting: shielding/no spill; observe 11:00 p.m. curfew unless business closes later (§ 17.108.190) .
  • If a “center” sign is proposed, confirm complex eligibility and size cap (CN/CG rules) (§§ 17.76.020, 17.88.040) .
  • If in SHO and visible from the corridor, file Scenic Highway Review before installation (§ 17.65.010) .
  • If within a mapped design review area, submit Design Review materials showing sign elevations/finishes (§§ 17.66.010, 17.67.010; § 17.08.150) .
  • Keep political signs within countywide limits and deadlines (§ 17.108.190.G) .

Risks & Ambiguities

Issue Why it matters What to verify
Off‑site signs generally prohibited Baseline ban can only be overridden if a principal zone allows it Confirm your base zone; note SHO explicitly bans off‑site signs (§ 17.65.010)
Corridor/overlay design rules They can lower caps, dictate materials, or require monument forms Whether your parcel is within SHO/DRO/HDRO and whether a scenic/design review is required (§§ 17.65.010, 17.66.010, 17.67.010)
Center monument eligibility Extra monument signs hinge on “3+ business entities” and complex naming Show tenant roster/common name; apply CN/CG caps (§§ 17.76.020, 17.88.040)
“Large‑scale” bonus in CN‑1 +32 sq ft only for buildings ≥10,000 sf; not stackable with certain other CN‑1 bonuses Gross floor area calculation and which bonuses you’re using (§ 17.76.020)
Political sign timing/placement Improper placement in ROWs or missed removal dates leads to violations Ensure setbacks from state highways/county roads and removal within 10 days after election (§ 17.108.190.G)
Nonconforming vs. illegal Determines if a sign can remain or must be abated If the existing sign had approvals; note enforcement cross‑reference (§ 17.144) and that amortization is repealed (§ 17.148.010)

Plain-English Summary

If you’re in the unincorporated areas, you’re always allowed small on‑site signage (up to 16 sq ft total, 20 ft tall), but bigger or additional signs depend on your commercial district and whether an overlay applies. Neighborhood and general commercial zones set frontage‑based formulas and special allowances for centers and large buildings, Yosemite West has a 50‑sq‑ft cap, and scenic/historic/design overlays add extra review and often push low, natural‑material monument signs. Flashing, moving, inflatable, and roof‑peak signs are out; keep lighting shielded and off after 11 p.m. or closing time, and remove political signs within 10 days after elections (§§ 17.108.190, 17.76.020, 17.88.040, 17.106.020, 17.65.010) .

Source References

  • § 17.108.190 Signs (countywide sign standards, including political and gateway provisions)
  • § 17.76.020 CN‑1 Development Standards (sign formulas, center monuments, large‑scale bonus)
  • § 17.80.020 CN‑2 Development Standards (adopts CN‑1 sign standards)
  • § 17.88.040 CG‑1 Design Criteria (adopts CN‑1 with higher caps)
  • § 17.92.040 CG‑2 Design Criteria (adopts CG‑1 design criteria)
  • § 17.106.020 Yosemite West Mixed‑Use (YWMU) sign cap/neon prohibition)
  • § 17.65.010 Scenic Highway Overlay (off‑site signs prohibited; scenic review)
  • § 17.66.010 Design Review Overlay (signs subject to design review)
  • § 17.67.010 Historic Design Review Overlay (exterior advertising displays require HDRO review)
  • § 17.148.010 Definitions (sign types, illegal/nonconforming, amortization repealed)
  • § 17.08.150 Commercial/Industrial/Multi‑family Site Plans (include sign locations/sizes)

Sources

Retrieved passages

  • CBC § 5405.3 (section 5405.3) High relevance
  • Mariposa County Zoning Code (section is) High relevance
  • CFC § 17.108.190 (Section 17.108.190) High relevance
  • CFC § 17.336.030 (Section 17.336.030) High relevance
  • Mariposa County Zoning Code (Section 17.08.140) High relevance
  • Mariposa County Zoning Code (section 17.144) Medium relevance
  • Mariposa County Zoning Code (section shall) Medium relevance
  • Mariposa County Zoning Code (title and) Medium relevance
  • Mariposa County Zoning Code (section 17.108.190.G.) High relevance
  • Mariposa County Zoning Code (Chapter 17.84) Medium relevance
  • Mariposa County Zoning Code (section is) Medium relevance
  • Mariposa County Zoning Code (section shall) Medium relevance
  • Mariposa County Zoning Code (section 17.65.010) Medium relevance

Cited sections

Frequently asked questions

What size sign can I put on my rural residential parcel in unincorporated Mariposa County?

Countywide, you may have on‑site signs totaling up to 16 sq ft and up to 20 ft tall by right, provided they aren’t flashing/moving and don’t spill light or create hazards. Off‑site signs are banned unless your principal zone allows them (§ 17.108.190) .

How do sign rules change in CN‑1 or CN‑2 commercial districts?

In CN‑1, your business sign area is 1 sq ft per linear foot of frontage, capped at 32 sq ft (48 sq ft on a second frontage), plus a 32‑sq‑ft monument for centers with 3+ tenants. CN‑2 uses the same rules. Large buildings (≥10,000 sf) can add 32 sq ft on the building face (§§ 17.76.020, 17.80.020) .

I’m in a CG‑1 shopping center—can I get more sign area?

Yes. CG‑1 adopts CN‑1 standards but allows up to 120 sq ft per business and a 64‑sq‑ft center identification monument sign. CG‑2 follows those same design criteria (§§ 17.88.040, 17.92.040) .

What if my property is along a scenic highway?

In the Scenic Highway Overlay (SHO), off‑site signs are prohibited and scenic review is required before installing visible signs. The overlay’s more restrictive standards control if they conflict with your base zone (§ 17.65.010) .

Are there special rules for Yosemite West?

Yes. In the YWMU zone, you’re limited to three signs per parcel and a total of 50 sq ft; neon is prohibited (§ 17.106.020) .

Do I need design review for signs in town cores or historic areas?

If you’re mapped in a Design Review Overlay (DRO) or Historic Design Review Overlay (HDRO), exterior signs are reviewed for visual compatibility with corridor or historic themes. Submit elevations/materials with your application (§§ 17.66.010, 17.67.010; § 17.08.150) .

What are the political sign rules?

Political signs can’t be in state highway or county road rights‑of‑way, must not hinder traffic safety, and must be removed within 10 days after the election. Each political sign is limited to 32 sq ft and can’t flash or move (§ 17.108.190.G) .

Are inflatable or roof‑mounted signs allowed?

No. Inflatable device signs and signs that extend above a building’s roof peak are prohibited, along with moving/rotating and flashing signs (§ 17.108.190) .

How are illegal or nonconforming signs handled?

Illegal signs are a zoning violation and public nuisance subject to enforcement. “Nonconforming sign” means it was legal when built but no longer meets today’s standards; the amortization provision is repealed (§§ 17.108.190, 17.148.010) .

Do I need to show signs on my site plan?

Yes. Commercial/industrial/multi‑family site plans must show sign locations, sizes, heights, and types. Some projects also require design or scenic highway review before permits (§ 17.08.150; § 17.65.010; § 17.66.010) .

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