Alturas Zoning, Planning & Building Codes

Last reviewed: July 3, 2026

Overview

Alturas's land-use rules are contained in Chapter 28 — ZONING of the City Code; the Zoning Ordinance implements the General Plan and sets the city’s zones, permit rules and site-planning standards (§ 28.10.010; § 28.10.020) . The ordinance organizes rules by Articles (zones and permitted uses, land-use restrictions, development standards, permit procedures, administration) so users can find where standards live and how projects are reviewed (§ 28.63.040) . This page distills the Alturas-specific district map, the citywide development rules you’ll encounter, the permit paths, and how state housing law (ADUs etc.) plugs into the local code.

How Alturas's code is organized

• The ordinance is Chapter 28 of the City Code and is expressly called the City of Alturas Zoning Ordinance (§ 28.10.010) .
• The chapter is split into Articles by subject: Article II = zones/uses; Article III = land-use restrictions; Article IV = site planning and development standards; Article V = permit processing; Article VI = administration and enforcement (§ 28.63.040) .
• The Land Use Matrix that shows permitted uses and permit types is at Table 28.22.020 and is the primary place to check whether an activity is by-right (P), administrative (AD), or requires a Use Permit (UP) (§ 28.22.020) .
• The City publishes Zone Maps (the map controls boundaries) and changes to maps follow the zone-change process in Article VI (§ 28.12.030; § 28.12.010.C) .

Zoning district families

Alturas uses a set of named Primary Zones (industrial, commercial, residential, special-purpose) and a small set of overlays:

• Residential family:

  • RR (Rural Residential) — up to 3 du/acre; for areas without full sewer/water (§ 28.21.020.B) .
  • R1 (Low/Single-family Residential) — up to 7.25 du/acre; allows one guest house and one secondary dwelling where permitted (§ 28.21.020.C) .
  • R2 (Medium Density Residential) — up to 15 du/acre; allows duplexes/three- and four-plexes (shared-wall) (§ 28.21.020.D) .
  • R3 (High Density Residential) — up to 29 du/acre; allows stacked apartments, condos, mobile home parks and some low‑intensity commercial as a transition (§ 28.21.020.E) .

• Commercial/industrial:

  • C1 (Retail/Office Commercial) and C2 (General Commercial); M1 (Light Industrial) and M2 (Heavy Industrial) — each described by intent and typical uses in Article II (§ 28.21.030—28.21.040) .

• Special purpose:

  • OS (Open Space) and RC (Recreation) (§ 28.12.010.A.5) .

• Overlay zones:

  • Alturas establishes overlay districts including -AS (Airport Safety), -FC (Flood Control), -DH (Downtown Historic District) and -MHP (Mobile Home Park); overlays are shown after the primary zone on the map (example: R1‑FC‑AS) and add requirements on top of the primary zone (§ 28.12.020; § 28.23.020—§ 28.23.050) . See the local rules for the -DH Downtown Historic District adjustments to setbacks and zero‑lot building typologies (§ 28.23.050) .

(First mention of overlays linked: Alturas Overlay Districts.)

Citywide development standards

Alturas sets general development controls in Article IV; below are the practical touchpoints and where to find them.

• How the standards are grouped: Article IV contains the Site Planning and Development Standards; many projects (commercial, industrial, high‑density residential) must conform to these standards (§ 28.63.040; § 28.20.080) . (First mention of development standards linked: Alturas Development Standards.)

• Setbacks and measurement:

  • Setbacks are measured from the property line/easement/right‑of‑way to the building foundation; exceptions and exempted elements (signs, fences) are listed in the same rules (see § 28.41.020 and § 28.41.050 on height measurement and exceptions) .

• Height:

  • Maximum heights are zone-specific (see Table 28.41.020 in Article IV) and measured from average finished grade to the highest point; certain mechanical elements may exceed the limit by up to 20% unless restricted by overlays (§ 28.41.050) .

• Lot coverage / FAR:

  • The chapter’s development tables and the site‑planning standards (Article IV) control lot coverage and related rules; where numeric limits apply they appear in the zone tables or Article IV standards (Table 28.41.020 and Article IV descriptions) .

• Parking:

  • Parking requirements and the need to show required parking on site plans are enforced through Site Plan and Use Permit review; Site Plans must clearly show required parking and parking is evaluated as part of development approvals (§ 28.42.030; § 28.41.020 reference to parking in plan requirements) . (First mention of parking linked: Alturas Parking.)

• Landscaping & screening:

  • New commercial, industrial and high‑density residential projects must meet the landscape standards (minimum 10% landscaped area for projects subject to Article IV) and submit landscape plans prepared by a licensed professional (§ 28.43.020—§ 28.43.030) .

• Design and discretionary review:

  • Projects other than single‑family residential require Site Plan Approval (ministerial or discretionary per Table 28.50.020) and some projects are subject to Use Permit review; Site Plans are the primary vehicle for design evaluation and include elevations, material boards and landscape plans (§ 28.42.010—§ 28.42.030; § 28.50.020) . (First mention of design review linked: Alturas Design Review.)

Specific plans & overlays

• The code does not list a standalone citywide specific plan in Chapter 28, but it provides for overlay districts that act like area‑specific controls (for example the -DH Downtown Historic District adjusts lot size, zero setbacks and other downtown main‑street rules (§ 28.23.050)) .
• Overlays are additive to the primary zone rules; where conflicts occur the more restrictive rule applies (§ 28.23.020—§ 28.23.030) . (First mention of overlays linked above.)

Building permits & review

• Who administers and who decides:

  • The ordinance assigns administration to the City Council, Planning Commission, and the Director of Public Works/Department; the Director performs staff review and can act on ministerial approvals (§ 28.10.030; § 28.61.020—§ 28.61.030) .

• Typical permit path:

  • Check the Land Use Matrix (Table 28.22.020) to determine permit type (§ 28.22.020) .
  • Minor, clearly‑standardized projects may qualify for Director‑level or Administrative Permit review; larger commercial, industrial or multi‑family projects require Site Plan Approval (Commission) or a Use Permit (public hearing) per Table 28.50.020 and Article V (§ 28.42.010; § 28.50.020; § 28.52.040) .
  • Site Plans are closely tied to the physical building permit: Site Plans show footprint, elevations and required parking and are used to evaluate landscape, lighting and signage before building permits are issued (§ 28.42.030) .

• Building code:

  • Building permits and code compliance are enforced through the City’s building permit process and the project must comply with the adopted building code at the time of permit (i.e., the City’s adopted version of the California Building Standards). Verify code edition with the Building Department (code cross‑references appear throughout Chapter 28; see general references to the Building Code in permit and nonconforming provisions) (§ 28.62.030 for building-code conformity of nonconforming structures) . (First mention of the state code linked: California Building Standards Code.)

• Time limits and permit recordings:

  • Discretionary permits (Use Permits, Variances) run with the land when recorded and their effective dates/appeal windows are set out in Article V; permits expire if not exercised (default 24 months unless otherwise specified) (§ 28.54.030; § 28.54.020; § 28.54.060) .

State housing law in Alturas

Alturas integrates state ADU and related laws into its code; here’s the local effect.

• Accessory/Secondary Dwelling Units (ADUs / "Secondary Dwellings"):

  • Alturas calls them Secondary Dwelling Units and implements California Government Code 65852.2 via § 28.38.040. One Secondary Dwelling is allowed by Administrative Permit when the local criteria are met (§ 28.38.040.A—C) . (First mention of ADUs linked: Alturas ADUs.)
  • Local maximums: Alturas establishes unit size limits by lot size (Table 28.38.040: 600 sf for lots ≤5,999 sf; 800 sf for 6,000–19,999 sf; 1,200 sf for lots ≥20,000 sf), while noting state law baseline rules (Table 28.38.040; § 28.38.040.5) .

• SB 9 / lot splits / duplexes:

  • Chapter 28 includes lot‑merger and lot‑line‑adjustment rules and treats lot mergers as ministerial under the State’s lot‑merger authority; explicit local treatment of SB 9 ministerial parcel splits or urban lot splits is not shown in the retrieved Chapter 28 excerpts — verify current SB 9 implementation with the City’s planning staff or recent ordinances (see voluntary lot merger rules at § 28.53.030 and the general Administrative/ministerial review matrix in Article V) (§ 28.53.030; § 28.50.030) . (For state ADU/parcel-splitting interaction, also consult the statewide summary at California ADU law or California housing laws for the latest statutory requirements.) (First mention of California ADU law linked: California ADU law.)

• Density bonus and rent controls:

  • The Chapter addresses permitted uses, development standards and nonconforming uses, but the retrieved text does not show a local density‑bonus ordinance or local rent‑control rules; these are not evident in the retrieved materials (Not found in retrieved materials — verify with the City or the General Plan and recent ordinances) .

Practical orientation (quick checklist)

• Start at the Land Use Matrix (Table 28.22.020) to determine permit type (§ 28.22.020) .
• If the project is commercial, industrial, or >4 residential units, plan for Site Plan Approval and show parking, landscaping, elevations and materials (§ 28.42.010; § 28.42.030; § 28.43.030) .
• Small residential changes may be administrative/ministerial; check the Director waiver rules and Administrative Permit path (§ 28.42.020; § 28.52.010) .
• For ADUs, follow § 28.38.040 and Table 28.38.040 for sizing and administrative-approval criteria (§ 28.38.040) .

Information gaps / recommended verifications

• SB 9 (urban lot split / duplex ministerial implementation): not explicitly shown in the retrieved Chapter 28 excerpts — confirm current local enabling ordinance or administrative rules with City staff (Not found in retrieved materials; verify with the City).
• Local adopted edition of the California Building Standards (Title 24) and any local amendments were not included in the retrieved Chapter 28 excerpts — confirm the Building Department’s adopted editions and local amendments (Not found in retrieved materials; verify with the Building Department / City Clerk).

Source References

• Alturas Zoning Ordinance — Chapter 28 (enactment and purpose) § 28.10.010; § 28.10.020
• Organization of the Zoning Ordinance (Articles and structure) § 28.63.040
• Primary Zones list and maps (AG, RR, R1, R2, R3, C1, C2, M1, M2, OS, RC) § 28.12.010; § 28.12.030
• Residential zone descriptions and densities § 28.21.020 (RR, R1, R2, R3)
• Land Use Matrix / permitted use table § 28.22.020 (Table 28.22.020)
• Site Plan, design review, and relationship to building permits § 28.42.010—§ 28.42.030
• Development standards (setbacks, height measurement) § 28.41.020; § 28.41.050
• Overlay zones and Downtown Historic District § 28.12.020; § 28.23.020—§ 28.23.050
• Secondary Dwelling (ADU) rules and local unit-size table § 28.38.040; Table 28.38.040
• Permit implementation, time limits and permits running with the land § 28.54.020—§ 28.54.030; § 28.54.060