Local zoning · Alpine County

Alpine County — Overlay Districts

Overlay Districts under the Alpine County local zoning and planning code, with the controlling citations.

Last reviewed: July 6, 2026

Overview

In unincorporated Alpine County, “overlay” zoning is implemented as combining zones that add special rules on top of a parcel’s base zone under the Alpine County Zoning Ordinance (Title 18). The county recognizes combining zones for scenic corridors, commercial recreation, and historic/design review. These apply only in unincorporated areas and are shown on the official zoning maps alongside the base district.

Plain-English: An overlay (combining) zone never replaces your base zoning; it layers extra limits or allowances. When standards conflict, the more restrictive overlay rule governs. See § 18.64.020.

Use this page with the county’s Alpine County Zoning, Alpine County Land Use, and Alpine County Development Standards guides.

How Alpine County uses combining zones

The ordinance lists combining zones for Design Review/Historic (DH), Scenic Highway (SH), and Commercial Recreation (CR) in § 18.12.010. They are applied in combination with a base zone (e.g., AG-CR) and appear on the official zoning maps.
“Combining zones may be used with any zoning classification,” meaning these overlays can be mapped over any base district unless limited elsewhere. Check the official maps at the Clerk/Planning offices per § 18.12.060.
The Zoning Ordinance applies only in the county’s unincorporated areas (§ 18.04.040).

Where your proposal triggers review or design conditions, coordinate early with Alpine County Design Review and check related standards like Alpine County Parking and Alpine County Signage.

District-by-district breakdown

-CR Commercial Recreation Combined Zone

Purpose. Provide commercial retail and services at select highway locations for visitors; protect and develop scenic/recreation areas suitable for intensive public use (e.g., ski areas or similar resorts) per § 18.64.010.
Where it applies. Applied as a suffix to a base zone (e.g., AG-CR, C-CR). The CR rules “apply in all districts with which [CR] are combined,” and the more restrictive regulation controls (§ 18.64.020). Verify mapping on the official zoning maps.
Typical permitted uses (§ 18.64.020):
- Retail shops serving travelers/visitors (e.g., hunting, fishing, skiing supplies, souvenirs, fuel).
- Living quarters accessory to the principal permitted use.
- Guest cottages and customary accessory uses.
Conditional uses (§ 18.64.030):
- Ski lifts/tows and other recreation/resort facilities drawing >100 persons or >25 vehicles at one time.
- Other retail/services not listed as permitted; quasi-public uses; campgrounds and travel trailer parks; summer home tracts on USFS lands.
Key dimensional standards. The code provides headings for “Area, lot width and yard requirements” and “Height regulations” in §§ 18.64.040–.050; specific numeric standards were not in the retrieved excerpt. Not found in retrieved materials. Verify with the jurisdiction.

Practical tip: In a -CR area, design and place uses to respect scenic context; if your program may exceed the “visitor-serving retail” scope, expect a use permit review under § 18.64.030 and cross-check general height/setback rules in Chapter 18.68.

-SH Scenic Highway Corridor Combined Zone

Purpose. Carry out General Plan goals to protect the county’s outstanding scenic resources (§ 18.60.010).
Applicability. Applies to any area visible from a designated scenic highway corridor as identified in the General Plan (§ 18.60.020). “Scenic highway corridor” and related terms (e.g., “steep slope,” “skyline features”) are defined in § 18.60.050.
Core rules. Certain uses/activities are prohibited where they create conspicuous visual contrast; several of these are absolutely prohibited within one-quarter mile of any designated scenic corridor (§ 18.60.030). Examples:
- General advertising billboards and off-premises signs.
- Wrecking yards, junkyards, refuse disposal sites.
- Most outdoor merchandise displays (limited exceptions for local agricultural products in AG/AP; see § 18.18.030(B)(4)).
- Commercial telecommunication towers/facilities.
- Overhead utilities (transmission lines, telecom cables).
- Power generation facilities (with narrow exceptions for small on-site solar/wind).
- Industrial uses (as classified by NAICS), except home occupations per § 18.70.
Design guidance. The chapter includes scenic corridor design guidelines (§ 18.60.040) that inform site planning, materials, colors, and screening. Coordinate with Alpine County Landscaping and Screening where relevant.

Practical tip: If your site is potentially visible from a designated corridor, pre-screen concepts against § 18.60.030’s absolute prohibitions (e.g., no new overhead utilities within one-quarter mile) before you invest in plans.

MHD Markleeville Historic District Combined Zone

Purpose. Protect and enhance the historic character of Markleeville; ensure new development harmonizes with the townsite’s historic character (§ 18.56.010). See Alpine County Historic Preservation.
Where it applies. Within the Markleeville townsite area identified in § 18.56.020. Verify mapped boundaries with Planning and the official zoning maps (§ 18.12.060).
What it regulates.
- Establishes the Markleeville design guidelines (§ 18.56.070) and a design review committee (§ 18.56.080) with procedures (§ 18.56.090).
- Sets a special demolition rule: structures placed prior to 1940 cannot be removed/demolished unless a replacement plan is approved (e.g., building permit for a new structure, approved CUP if no structure, or an approved PD development plan) per § 18.56.100.
- Provides dimensional requirements (building height, lot area, setbacks) at § 18.56.050. Specific numbers were not in the retrieved excerpt. Not found in retrieved materials. Verify with the jurisdiction.
Enforcement and appeal.
- Appeals go to the Planning Commission (§ 18.56.110).
- Violations can carry penalties up to $10,000 per occurrence (§ 18.56.120).

Note on “DH.” The county’s zone list includes a generic DH Design Review/Historic combining zone (§ 18.12.010). In practice, the retrieved materials implement historic/design review through the MHD combined zone with its own guidelines, committee, and procedures. Not found in retrieved materials: a separate, countywide DH chapter with standards independent of MHD.

Decision-relevant standards at a glance

Overlay	What it does	Key do’s/don’ts	Code Reference
-CR Commercial Recreation	Adds visitor-serving commercial allowances at select highway locations; more restrictive rules prevail over base zone	Permits traveler-oriented retail, accessory living quarters, guest cottages; larger resort/recreation uses need a use permit	§ 18.64.010; § 18.64.020; § 18.64.030
-SH Scenic Highway Corridor	Protects views from designated scenic highways	Absolutely prohibits new billboards, wrecking yards, most outdoor displays, overhead utilities, commercial telecom towers, most industrial uses within/near corridors; follow scenic design guidelines	§ 18.60.010; § 18.60.020; § 18.60.030; § 18.60.040
MHD Markleeville Historic District	Requires historic-compatible design and controls demolition	Design review required per Markleeville guidelines/committee; no demolition of pre-1940 structures without an approved replacement plan	§ 18.56.010; § 18.56.070–.090; § 18.56.100

Use overlays with the base district’s dimensional rules in Chapter 18.68 and any project-specific review like Alpine County Design Review. Where conflicts arise, the overlay’s more restrictive standard controls (§ 18.64.020).

Checklist

Confirm your parcel is in unincorporated Alpine County (§ 18.04.040).
Check the official zoning map for any combining zone suffixes (e.g., -CR, MHD; § 18.12.060).
For sites visible from scenic highways, pre-screen plans against § 18.60.030 prohibitions and follow § 18.60.040 guidelines.
In MHD, prepare submittals per the Markleeville design guidelines and committee procedures (§§ 18.56.070–.090).
If proposing resort-scale or non-listed CR uses, prepare a use permit application under § 18.64.030.
Cross-check base-zone setbacks/height and general standards in Chapter 18.68 and related Alpine County Parking and Alpine County Signage rules.
If constraints make compliance impractical, consult Alpine County Variances and Exceptions and confirm any nonconforming status under Alpine County Nonconforming Uses.

Risks & Ambiguities

Issue	Why it matters	What to verify
“Visible from a scenic highway” standard in -SH	Triggers absolute prohibitions and design constraints (§ 18.60.020, § 18.60.030)	Request a visibility determination from Planning; confirm the designated corridor and viewpoints.
CR dimensional standards not in excerpt	Affects lot size, yards, and height in -CR areas (§§ 18.64.040–.050)	Obtain the current ordinance text or staff confirmation; do not assume base-zone dimensions apply.
MHD boundaries and exact dimensional numbers	Determines if design review/demolition rules apply and which setbacks/height govern (§ 18.56.020, § 18.56.050)	Check official zoning maps (§ 18.12.060) and the MHD chapter as maintained by the County Clerk.
Overlay vs. base-zone conflicts	Dictates which standard you must follow	Apply the more restrictive provision per § 18.64.020; when unclear, seek written staff interpretation.
Historic period definition in MHD	Guides compatible architecture and review scope (§ 18.56.060)	Request Markleeville design guidelines and committee interpretation before final design. Not found in retrieved materials.

Plain-English Summary

If your property in unincorporated Alpine County has an overlay, you must meet those extra rules in addition to base zoning. Near scenic highways, expect stricter visual protections and outright bans on things like billboards and overhead lines; in Markleeville’s historic district, expect design review and special demolition limits for pre-1940 structures; and in commercial recreation overlays, visitor-serving uses are emphasized, with larger resort uses needing permits.

Source References

Zoning applies to unincorporated areas: § 18.04.040.
Zones designated; combining zones listed (DH, SH, CR): § 18.12.010; combining zones may be used with any zoning classification; official maps: §§ 18.12.050–.060.
Scenic Highway Corridor Development Requirements: §§ 18.60.010–.050.
MHD Markleeville Historic District Combined Zone: §§ 18.56.010–.120.
CR Commercial Recreation Combined Zone: §§ 18.64.010–.050.
General standards and exceptions (height, etc.): Chapter 18.68.
Nonconforming uses: Chapter 18.72.

Sources

Retrieved passages

Alpine County Zoning Code (§ 8.02) Medium relevance
Alpine County Zoning Code (§ 1) Medium relevance
Alpine County Zoning Code (title and) Medium relevance
Alpine County Zoning Code (Chapter 18.28) Medium relevance
Alpine County Zoning Code (chapter may) Medium relevance
Alpine County Zoning Code (§ 2) Medium relevance
Alpine County Zoning Code (§ 1) Medium relevance
Alpine County Zoning Code (Chapter 18.72) Medium relevance

Cited sections

Zoning applies to unincorporated areas: § 18.04.040. (§ 18.04.040.)
Zones designated; combining zones listed (DH, SH, CR): § 18.12.010; combining zones may be used with any zoning classification; official maps: §§ 18.12.050–.060. (§ 18.12.010)
Scenic Highway Corridor Development Requirements: §§ 18.60.010–.050. (§ 18.60.010)
MHD Markleeville Historic District Combined Zone: §§ 18.56.010–.120. (§ 18.56.010)
CR Commercial Recreation Combined Zone: §§ 18.64.010–.050. (§ 18.64.010)
General standards and exceptions (height, etc.): Chapter 18.68. (Chapter 18.68.)
Nonconforming uses: Chapter 18.72. (Chapter 18.72.)
AlpineCounty_ZoningCode.md

Frequently asked questions

How do I know if my unincorporated Alpine County parcel has an overlay?

Check the official zoning maps kept by the County Clerk and Planning; combining zones appear as suffixes (e.g., AG-CR, or mapped MHD areas). See § 18.12.060 and the zones list in § 18.12.010.

What does the Scenic Highway overlay prohibit?

In areas visible from designated scenic corridors, billboards, wrecking yards, overhead utilities, commercial telecom towers, most industrial uses, and some outdoor merchandise displays are prohibited (some absolutely within one-quarter mile). See §§ 18.60.020–.030.

Does the MHD overlay change what uses are allowed in Markleeville?

MHD primarily adds design review and demolition controls; it does not wholesale replace base-zone uses. You must follow the Markleeville design guidelines and committee procedures (§§ 18.56.070–.090), and you cannot demolish most pre-1940 structures without an approved replacement plan (§ 18.56.100).

What kinds of uses fit the Commercial Recreation (-CR) overlay?

Traveler-serving retail (e.g., recreation gear, fuel, souvenirs) and related accessory living quarters/guest cottages are permitted; larger resort facilities (ski lifts, camps, travel trailer parks) typically require a use permit. See §§ 18.64.020–.030.

If my overlay conflicts with my base zone, which standard wins?

The more restrictive standard applies. The CR chapter states that when its rules differ from the base district’s, the more restrictive rule controls (§ 18.64.020), a good rule of thumb for overlays.

Are there special design rules I must follow under the Scenic Highway overlay?

Yes. Beyond the prohibitions, you must use scenic design guidelines in § 18.60.040, which address how projects appear from the corridor (materials, colors, screening, etc.).

Can I demo an old building in Markleeville’s historic district?

Not without an approved replacement plan. For structures placed prior to 1940, the county must first approve a replacement building permit, a CUP (if no building), or a PD development plan (§ 18.56.100).

Where can I find the precise -CR or MHD boundaries?

On the official zoning maps available from the County Clerk and Planning (§ 18.12.060). Always verify parcel-specific overlays with staff before design.

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