Plumas County — Signage

Last reviewed: July 6, 2026

Overview

This page summarizes how signs are regulated in the unincorporated areas of Plumas County under Title 9 (Planning and Zoning). The countywide sign standards live in the General Requirements article and apply across zoning districts, with some districts adding their own size caps or options by permit. Project-level rules may also intersect with Plumas County Zoning, site development standards, and in some cases design review.

The single most important rule: Off‑premises business or advertising signs are not permitted anywhere in unincorporated Plumas County; promotional flags are allowed only as promotional signs subject to time limits. See § 9‑2.416(a)(5) .

What “sign” means in Plumas County

The code defines a family of sign types used throughout the standards, including business sign, community identification sign, community organization sign, construction sign, home business sign, nameplate, promotional sign, real estate sign, and subdivision sign. See definitions in § 9‑2.288 and related entries .

Countywide sign standards (apply in all districts unless specified otherwise)

• Measuring sign area. The face area for a wall‑flush sign is the smallest plane enclosing all characters and voids; for freestanding or projecting signs, it’s the total sign structure; two parallel faces count as one face. See § 9‑2.416(a)(1) .
• Sign height. A sign may not exceed the maximum building height of the zone where it’s placed. See § 9‑2.416(a)(2); examples of zone heights: C‑1: 35 ft (§ 9‑2.1903) ; C‑2: 40 ft (§ 9‑2.2003) ; R‑10: 35 ft (§ 9‑2.1703) ; Rec‑OS: 35 ft (§ 9‑2.2403) ; GF: 60 ft (§ 9‑2.3303) .
• Maintenance. Signs must be kept safe/readable and advertise a valid, operating activity (seasonal allowed). If 20%+ of a face is missing/indistinguishable or the activity is nonfunctioning, the Planning Director may notice the owner; correction or removal is required within 30 days. § 9‑2.416(a)(3) .
• Exempt signs (not subject to the chapter). Examples include signs not visible off‑site, window displays, official notices, and government‑authorized directional/information signs; support structures for nameplates are also exempt. § 9‑2.416(a)(4) .
• Prohibited. Moving/noise‑making devices or flashing lights (except time/temperature), and all off‑premises business/advertising signs in any zone. Flags may be used only as promotional signs under the time limits below. § 9‑2.416(a)(5) .
• Business signs. Tied to the zoning where business uses are permitted; area is based on the “building front” plane; may be wall‑mounted or freestanding and must front the street used for area calculation; require Planning Director approval. § 9‑2.416(b)(1) .
• Community identification signs. Allowed with a special use permit (SUP) in all zones except OS and TPZ, up to 200 sf; service identifications can comprise up to 33% of the area; must fit local character. § 9‑2.416(b)(2) .
• Community organization signs. Allowed with an SUP in all zones except OS and TPZ; at most 4 per town/community. § 9‑2.416(b)(3) .
• Construction sign. One per site with an active building permit; ≤32 sf; remove at certificate of occupancy; requires Planning Director approval. § 9‑2.416(b)(4) .
• Home business/industry sign. One per permitted home business/home industry; ≤6 sf. § 9‑2.416(b)(5) .
• Nameplate. One per dwelling unit; ≤6 sf. § 9‑2.416(b)(6) .
• Promotional signs. Allowed on the special event site; off‑site allowed except for business special events; window and bulletin‑board postings also allowed; display for ≤30 days; business special event flags limited to 30 days per season with at least one week between seasons. § 9‑2.416(b)(7) .
• Real estate sign. On the subject property; ≤6 sf. § 9‑2.416(b)(8) .
• Subdivision signs. Two allowed; aggregate ≤200 sf; remove when 90% of lots are sold. On‑site signs need Planning Director approval; Off‑site wayfinding is allowed only by SUP and only at the access road’s intersection with a County road or State highway, within the access easement and outside the public right‑of‑way, and must fit local character. § 9‑2.416(b)(9) .

Where construction or electrical aspects of a sign are involved, those are governed by the California Building Standards Code (Title 24), separate from zoning. If your sign involves specialty structures or illumination, coordinate early.

District-by-district sign highlights (unincorporated areas)

Each district below references the countywide standards in § 9‑2.416 and then adds any district‑specific caps or options. For broader context on uses and intent by zone, see Plumas County Land Use.

Core Commercial — C‑1

• Purpose/uses: Not found in retrieved materials.
• Key dimensional standards: 35 ft max building height (§ 9‑2.1903); typical urban setbacks (often none) per § 9‑2.1905 .
• Signs: As permitted by § 9‑2.416; business sign area ≤ 10% of building front area or 200 sf (lesser) per frontage; minimums: 16 sf per frontage and 4 sf per business activity. § 9‑2.1907 .

Periphery Commercial — C‑2

• Purpose: Provide major commercial uses near large population centers. § 9‑2.2001 .
• Typical permitted uses include retail, restaurants, lodging and vehicle services. § 9‑2.2002 .
• Key dimensional standards: 40 ft building height; commercial setbacks often none except near residential. § 9‑2.2003–2005 .
• Signs: As permitted by § 9‑2.416; business sign area ≤ 10% of building front area or 200 sf (lesser) per frontage; minimum 32 sf per frontage; plus one additional self‑supporting sign by SUP up to 200 sf. § 9‑2.2008 .

Convenience Commercial — C‑3

• Purpose: Serve small centers, highway‑oriented and commercial‑recreation uses. § 9‑2.2101 .
• Typical permitted uses include retail, restaurants, personal services, and vehicle services. § 9‑2.2102 .
• Signs: As permitted by § 9‑2.416; business sign area ≤ 10% of building front or 200 sf (lesser) per frontage; minimum 32 sf per frontage; by SUP, one extra self‑supporting sign up to 100 sf. § 9‑2.2107 .

Recreation Zones — Rec‑P, Rec‑1, Rec‑3, Rec‑10, Rec‑20

• Purpose/uses: Not found in retrieved materials.
• Signs: As permitted by § 9‑2.416; business sign area ≤ 10% of building front or 200 sf (lesser) per frontage; minimum 32 sf per frontage; by SUP, one extra self‑supporting sign up to 100 sf. § 9‑2.2307 .

Recreation–Open Space — Rec‑OS

• Purpose: Open space and open‑space recreation on prime recreation sites; cemeteries. § 9‑2.2401 .
• Typical permitted uses: Golf, parks, grazing, timber management, boat ramps. § 9‑2.2402 .
• Key dimensional standards: 35 ft building height; 20 ft front yard; side/rear 5 ft (10 ft next to residential). § 9‑2.2403–2405 .
• Signs: As permitted by § 9‑2.416; business sign area ≤ 10% of building front or 200 sf (lesser) per frontage; minimum 32 sf per frontage; by SUP, one extra self‑supporting sign up to 100 sf. § 9‑2.2407 .

Light Industrial — I‑2

• Purpose/uses: Light industrial manufacturing/assembly; storage; transport stations. § 9‑2.2602 (partial) Not found in retrieved materials.
• Key dimensional standards: Not found in retrieved materials.
• Signs: As permitted by § 9‑2.416; business sign area limited to ten percent of building front square footage with a cap that appears to be 200 sf per frontage; minimum 32 sf per frontage; by SUP, one extra self‑supporting sign up to 200 sf. Text includes minor ambiguities; verify sizing with County. § 9‑2.2607 .

Agricultural Preserve — AP

• Purpose: Implement Williamson Act preserve intent. § 9‑2.3001 .
• Typical permitted uses: Agriculture/timber; one dwelling; child day care homes; certain recreation and events via permit. § 9‑2.3002 .
• Signs: As permitted by § 9‑2.416; business signs ≤32 sf. § 9‑2.3007 .

General Agriculture — GA

• Purpose: Protect commercially viable agriculture areas. § 9‑2.3101 .
• Typical permitted uses: Agriculture, one or two dwellings depending on acreage, home businesses; certain recreational/resort uses via permit. § 9‑2.3102 .
• Signs: Not found in retrieved materials; default countywide rules in § 9‑2.416 apply.

General Forest — GF

• Purpose/uses: Not found in retrieved materials.
• Key dimensional standards: 60 ft building height; front 20 ft, side/rear 5 ft. § 9‑2.3303–3305 .
• Signs: As permitted by § 9‑2.416; business signs ≤32 sf. § 9‑2.3307 .

Lake — L

• Purpose/uses: Not found in retrieved materials.
• Key dimensional standards: One‑story height; large lot/width; no required yards. § 9‑2.2903–2905 .
• Signs: As permitted by § 9‑2.416; business signs ≤32 sf. § 9‑2.2906 .

Rural — R‑10

• Purpose: Provide rural dwellings at 10 acres per unit with compatible uses. § 9‑2.1701 (purpose) Not found in retrieved materials.
• Key dimensional standards: 35 ft building height; 20 ft front yard; 5 ft/story side/rear. § 9‑2.1703–1705 .
• Signs: As permitted by § 9‑2.416. § 9‑2.1707 .

Quick reference — common sign types and limits

Practical notes

• Height follows your zone’s building height. Since signs can’t exceed the zone’s building height, check your zone’s max height in Plumas County Development Standards or the zone article, then size the support/placement accordingly (e.g., C‑2: 40 ft, C‑1: 35 ft) .
• Right‑of‑way and highways. Off‑site advertising is prohibited by the sign code countywide (§ 9‑2.416(a)(5)). For temporary event signage in or near rights‑of‑way, the County requires an encroachment permit, and the State bars advertising in State highway rights‑of‑way; use only traffic‑control‑compliant temporary notices. See the event standards cross‑reference to § 9‑2.416 .
• Legacy/nonconforming signs. If you have an older sign that doesn’t meet current standards, review Plumas County Nonconforming Uses before altering or replacing it.
• Exceptions/relief. If a unique site condition prevents compliance, see Plumas County Variances and Exceptions for process guidance.
• Overlays and historic areas. If your parcel is within an overlay (e.g., Airport Combining, floodplain) or a historic area, check Plumas County Overlay Districts and Plumas County Historic Preservation early—local aesthetics/placement expectations can apply in addition to sign size rules.

Checklist

• Confirm your parcel is in the unincorporated area and identify its zoning district on the Plumas County Zoning map reference.
• Size your sign using the countywide rules in § 9‑2.416 (area method, height tied to zone) and any district cap (e.g., C‑1/C‑2/C‑3/Rec formulas; L/AP/GF 32 sf caps) .
• Check whether your sign type is exempt, prohibited, or requires a Special Use Permit (SUP) or Planning Director approval (community ID/org, construction, promotional, subdivision). § 9‑2.416(a)–(b) .
• For business signage, confirm frontage used to calculate area and that placement is on that frontage or its yard. § 9‑2.416(b)(1) .
• If near a County/State right‑of‑way or an event sign, coordinate any needed encroachment approvals and avoid prohibited off‑site advertising. Cross‑reference to § 9‑2.416 in event standards .
• Verify no overlay or historic constraints alter design/placement expectations; consult Plumas County Design Review if part of a larger project.
• For construction or electrical illumination, plan separately for California Building Standards Code compliance.

Risks & Ambiguities

Plain-English Summary

If your property is in unincorporated Plumas County, start with the countywide rules: keep signs on‑site, size them by your street‑facing building frontage, and don’t exceed your zone’s building‑height limit. Then layer on any district caps (e.g., C‑1/C‑2/C‑3/Rec formulas; 32‑sf caps in L/AP/GF). Special cases—community, subdivision, construction, and event signs—have their own size, location, and permit rules. When in doubt, keep it on‑site, within the frontage‑based area, and consistent with neighborhood character.

Source References

• Countywide sign standards: § 9‑2.416 (General Requirements: Signs) .
• Sign type definitions: § 9‑2.288 (Sign) and related entries .
• Real estate and subdivision signs: § 9‑2.416(b)(8)–(9) .
• Zone‑specific signage:
  • C‑1 Signs: § 9‑2.1907; height/yards § 9‑2.1903–1905 .
  • C‑2 Signs: § 9‑2.2008; purpose/uses/height/yards § 9‑2.2001–2005 .
  • C‑3 Signs: § 9‑2.2107; purpose/uses § 9‑2.2101–2102 .
  • Rec Signs: § 9‑2.2307 .
  • Rec‑OS Signs: § 9‑2.2407; purpose/uses/height/yards § 9‑2.2401–2405 .
  • I‑2 Signs: § 9‑2.2607 (verify caps) .
  • AP Signs: § 9‑2.3007; purpose/uses § 9‑2.3001–3002 .
  • GA: purpose/uses § 9‑2.3101–3102; sign‑specific section not found .
  • GF Signs: § 9‑2.3307; height/yards § 9‑2.3303–3305 .
  • L Signs: § 9‑2.2906; height/area/yards § 9‑2.2903–2905 .
  • R‑10 Signs: § 9‑2.1707; height/yards § 9‑2.1703–1705 .
• Event cross‑reference to sign rules and right‑of‑way cautions: limited commercial social event standards (refers to § 9‑2.416) .
• Title 24 (construction/illumination of signs): California Building Standards Code (not a zoning source; provided for separation of scopes). Select structural/illumination excerpts shown in Appendix H (FYI only) .

Retrieved passages

• Plumas County Zoning Code (chapter and) Medium relevance show source text
• Plumas County Zoning Code Medium relevance show source text
• CFC § 9 (Section 9-2.416) Medium relevance show source text
• CBC § H101 (SECTION H101) Medium relevance show source text
• CBC § 3 (§ 3) Medium relevance show source text
• CBC § H103 (SECTION H103) Medium relevance show source text
• Plumas County Zoning Code (Section 9-2.4404) Medium relevance show source text
• CBC § H113 (SECTION H113) Medium relevance show source text
• Plumas County Zoning Code (§ 3) Medium relevance show source text
• Plumas County Zoning Code (§ 3) Medium relevance show source text
• Plumas County Zoning Code (§ 3) Medium relevance show source text
• Plumas County Zoning Code (§ 12) Medium relevance show source text
• Plumas County Zoning Code (§ 3) Medium relevance show source text
• Plumas County Zoning Code (§ 3) Medium relevance show source text
• Plumas County Zoning Code (§ 3) Medium relevance show source text
• Plumas County Zoning Code (§ 3) Medium relevance show source text
• Plumas County Zoning Code (§ 3) Medium relevance show source text

Cited sections

• Countywide sign standards: **§ 9‑2.416** (General Requirements: Signs) . (§ 9)
• Sign type definitions: **§ 9‑2.288 (Sign)** and related entries . (§ 9)
• Real estate and subdivision signs: **§ 9‑2.416(b)(8)–(9)** . (§ 9)
• Zone‑specific signage:
• **C‑1 Signs**: **§ 9‑2.1907**; height/yards **§ 9‑2.1903–1905** . (§ 9)
• **C‑2 Signs**: **§ 9‑2.2008**; purpose/uses/height/yards **§ 9‑2.2001–2005** . (§ 9)
• **C‑3 Signs**: **§ 9‑2.2107**; purpose/uses **§ 9‑2.2101–2102** . (§ 9)
• **Rec Signs**: **§ 9‑2.2307** . (§ 9)
• **Rec‑OS Signs**: **§ 9‑2.2407**; purpose/uses/height/yards **§ 9‑2.2401–2405** . (§ 9)
• **I‑2 Signs**: **§ 9‑2.2607** (verify caps) . (§ 9)
• **AP Signs**: **§ 9‑2.3007**; purpose/uses **§ 9‑2.3001–3002** . (§ 9)
• **GA**: purpose/uses **§ 9‑2.3101–3102**; sign‑specific section not found . (§ 9)
• **GF Signs**: **§ 9‑2.3307**; height/yards **§ 9‑2.3303–3305** . (§ 9)
• **L Signs**: **§ 9‑2.2906**; height/area/yards **§ 9‑2.2903–2905** . (§ 9)
• **R‑10 Signs**: **§ 9‑2.1707**; height/yards **§ 9‑2.1703–1705** . (§ 9)
• Event cross‑reference to sign rules and right‑of‑way cautions: limited commercial social event standards (refers to **§ 9‑2.416**) . (§ 9)
• Title 24 (construction/illumination of signs): California Building Standards Code (not a zoning source; provided for separation of scopes). Select structural/illumination excerpts shown in Appendix H (FYI only) . (Title 24)
• PlumasCounty_ZoningCode.md
• 2025 California Building Code.md

• Official Plumas County code library