Alturas — Development Standards

Last reviewed: July 3, 2026

Overview

This page summarizes what the City of Alturas Zoning Ordinance (Chapter 28) actually says about development standards — setbacks, height, lot/lot‑width rules, accessory structure limits, density and related standards — and where to look in the ordinance for authoritative language. For zoning maps and allowed uses see Alturas Zoning and for the ordinance's land‑use matrix see Alturas Land Use. This page links the practical rules to the controlling code sections so applicants can verify specifics with the City.

Note: where the ordinance points to a numeric table (Table 28.41.020) but the table values themselves are not present in the retrieved materials, I state that explicitly and point you to the controlling § to verify with the jurisdiction.

How the ordinance organizes development standards (quick)

• The City’s general development rules live in Article IV, Division 1 and the consolidated matrix is Table 28.41.020 (§ 28.41.020) — the matrix is the starting point for zone‑specific setback, height and lot standards.
• Measurements and methods (how setbacks and height are measured) are spelled out in § 28.41.040 and § 28.41.050.
• Overlay zones (for special areas like downtown historic) add requirements on top of the primary zone standards; see Overlay Districts.

This page also references related process pages you will likely use: parking, design review, overlay districts, ADUs, and the California Building Standards Code.

• The City’s parking rules are separate and applied via Article IV, Division 6; see the local parking policy for required stall counts.

District-by-district breakdown (what the ordinance actually says)

Notes on format: each district heading is bolded; where the ordinance gives a numeric standard I quote it and cite the controlling §. Where the ordinance points to the development matrix (Table 28.41.020) but the numeric table content was not in the retrieved materials, I flag that as Not found in retrieved materials and cite the § that references the table.

General Agriculture (AG)

• Purpose & where it’s applied: Intended for grazing, animal raising, horticulture and limited residential uses; residential development minimum lot size for residential use is 2 acres. § 28.21.020(A).
• Typical permitted uses: agricultural operations, limited residences, barns and animal shelters (animal uses are broadly allowed consistent with the zone descriptions). § 28.21.020(A).
• Key dimensional notes: The ordinance refers users to Table 28.41.020 for the zone’s setbacks, height and lot coverage standards — the table itself is referenced in § 28.41.020 but the numeric table values are Not found in retrieved materials here. § 28.41.020.
• Accessory structure limits (local numeric rules available in text): One barn in AG may be built up to 1,500 sq. ft. and up to 25 ft high without an Administrative Permit (accessory‑structure permits discussed in § 28.38.050).

Rural Residential (RR)

• Purpose: Low‑density residential where sewer/water capacity is limited. § 28.21.020(B).
• Density: up to 3 dwelling units per net acre. § 28.21.020(B).
• Dimensional standards: See Table 28.41.020 for setbacks, maximum height and lot coverage — the ordinance establishes the matrix at § 28.41.020 but the table numbers themselves are Not found in retrieved materials. § 28.41.020.

Single Family Residential (R1)

• Purpose: Lower‑density residential where water/sewer are available. § 28.21.020(C).
• Density: up to 7.25 dwelling units per net acre (maximum density specified). § 28.21.020(C).
• Dimensional standards: See Table 28.41.020 for setbacks/height/lot coverage (Table referenced at § 28.41.020; table details Not found in retrieved materials). § 28.41.020.

Medium Density Residential (R2)

• Purpose: Duplexes, triplexes, fourplexes and similar shared‑wall housing. § 28.21.020(D).
• Density: up to 15 dwelling units per net acre. § 28.21.020(D).
• Dimensional standards: See Table 28.41.020 for specific setbacks/height/coverage (table numbers Not found in retrieved materials). § 28.41.020.

High Density Residential (R3)

• Purpose: Multifamily, stacked apartments and mobile home parks. § 28.21.020(E).
• Density: up to 29 dwelling units per net acre. § 28.21.020(E).
• Dimensional standards: See Table 28.41.020; table values Not found in retrieved materials. § 28.41.020.

C1 (Retail/Office Commercial) and -DH (Downtown Historic) overlay

• Purpose & permitted uses: C1 is intended for retail/office; the Downtown Historic overlay (-DH) encourages zero front setbacks and pedestrian‑oriented "Main Street" development. § 28.23.050 explains the overlay’s effect (zero front setbacks and no minimum lot size inside -DH).
• Key special rule in overlay: in the -DH overlay, “All buildings along Main Street shall have a zero front setback unless a Variance is granted” and there may be no minimum lot size. § 28.23.050(C)(1–2).
• Mixed‑use rule: Residential on ground floor is restricted in C1 (residential is not allowed on the first floor in C1; see notes to the development matrix). § 28.41.020.

Standalone numeric standards the ordinance DOES state (usable, citable numbers)

Important caveat: for the standard zone setbacks, heights and lot coverage values the ordinance points you to Table 28.41.020 (the General Development Standards Matrix, § 28.41.020) — the table entries themselves are Not found in the retrieved materials for this task. § 28.41.020.

Practical guidance / interpretation notes

• Always start with the zone: confirm the parcel zone on the City’s map (see Alturas Zoning) then read Table 28.41.020 (the controlling matrix) and its footnotes. § 28.41.020.
• Where a Use Permit is authorized, the City may impose more restrictive dimensions (setbacks, height, parking) but it cannot make the base numeric limits less restrictive unless you secure a Variance. See § 28.52.040 (Use Permits) and Variance criteria in § 28.52.050. file
• If you are in the -DH (Downtown Historic) overlay, the overlay changes the matrix: front setbacks may be zero and minimum lot size can be waived. § 28.23.050(C).
• Accessory dwelling and guest‑house rules: the ordinance sets specific ADU size caps by lot size (Table 28.38.040) and otherwise requires compliance with the standard development rules; consult the City ADU rules and California ADU law for state limits. § 28.38.040.

Useful related local pages (first natural mention of each linked):

• Alturas Zoning — the City zoning/maps page: Alturas Zoning
• For how setbacks and other site development standards interact with uses see Alturas Land Use
• Parking rules referenced by some use standards: Alturas Parking
• Site plan / design policy and discretionary review: Alturas Design Review
• Overlay rules: Alturas Overlay Districts
• ADU specifics: Alturas ADUs
• For building code requirements consult the state code: California Building Standards Code

Information Gaps (what I could NOT confirm from the retrieved materials)

• The numeric entries for setback depths, maximum building heights by zone, maximum lot coverage and any floor‑area‑ratio (FAR) values are referenced but the actual numbers in Table 28.41.020 are Not found in retrieved materials. The ordinance explicitly points you to Table 28.41.020 for this; see § 28.41.020. Verify these numeric values with the City.
• Explicit mention of a FAR standard is Not found in the retrieved materials; the ordinance references lot coverage and open space but the presence and numeric value of an FAR is Not found in retrieved materials. Verify with the City.
• The full Land Use Matrix (which lists allowed uses per zone) and the full Article IV development matrix were referenced but not fully present in the materials I searched; consult the City’s published Chapter 28 or contact the Planning Department for the complete printed table. § 28.41.020.

Checklist (what an applicant must satisfy for a typical residential project)

• Confirm parcel zoning and any overlay(s); check Alturas Zoning and Alturas Overlay Districts. file
• Review Table 28.41.020 (General Development Standards) for the zone’s setbacks, height and lot coverage limits (Table referenced at § 28.41.020). Verify numeric values with City staff.
• Prepare a Site Plan showing footprints, parking, drainage, landscaping (Site Plan rules and relationship to permits: § 28.42.030).
• Ensure accessory structures meet the numeric caps in § 28.38.050 (garages, workshops, sheds, barns).
• For ADUs, confirm compliance with Table 28.38.040 and state ADU law; submit Administrative Permit if required (§ 28.38.040).
• If the project needs variances or a use permit (e.g., to alter setbacks or heights), prepare findings and public notice per § 28.52.040 and § 28.52.050. file
• If your project is commercial or multi‑unit (>4 units) prepare for Site Plan Review and possible Design Review per Article IV and § 28.42.010.

Risks & Ambiguities

Plain‑English summary

Alturas places the numeric setbacks, heights and coverage limits in a single development standards matrix (Table 28.41.020). The ordinance defines zone purposes (e.g., AG: 2 acres min residential lot; R1: 7.25 du/acre; R2: 15 du/acre; R3: 29 du/acre), provides detailed accessory‑structure caps (garages, sheds, barns) and explains how to measure setbacks and building height; however, the retrieved materials did not include the actual numeric entries from Table 28.41.020, so confirm the per‑zone setback/height/lot‑coverage figures with the City. § 28.21.020, § 28.41.020, § 28.38.050, § 28.41.040, § 28.41.050. filefilefilefile

Source References

• City of Alturas Zoning Ordinance, Article IV — General Development Standards (Table 28.41.020 referenced in text): § 28.41.020.
• Setback rules and how to measure them: § 28.41.040.
• Height limits and measurement: § 28.41.050.
• Accessory structures and single family dwelling accessory limits (garages, workshops, sheds, barns): § 28.38.050.
• Secondary dwelling (ADU/JADU) size table: § 28.38.040, Table 28.38.040.
• Zone descriptions and densities (AG, RR, R1, R2, R3): § 28.21.020.
• Overlay Districts, Downtown Historic (-DH) exceptions (zero front setback, no min lot size): § 28.23.050(C).
• Site plan rules and relationship to other permits: § 28.42.010 – § 28.42.030.
• Variance criteria and procedures: § 28.52.050.
• Fence/wall rules (height, prohibited materials): § 28.41.060.
• Local parking references (used in several special‑use rules): Article IV, Division 6 (see campground example § 28.37.020).

Retrieved passages

• CBC § 28.38.040 (Section shall) High relevance show source text
• Alturas Zoning Code (Article III) High relevance show source text
• Alturas Zoning Code (Article III) High relevance show source text
• CBC § 65852.2 (Section 65852.2) High relevance show source text
• CBC § 66314 (§ 66314) High relevance show source text
• Alturas Zoning Code (Section 18860) High relevance show source text
• Alturas Zoning Code (chapter to) Medium relevance show source text
• Alturas Zoning Code (section is) Medium relevance show source text
• Alturas Zoning Code (Article VIII) High relevance show source text
• CBC § 28.52.010 (Section may) High relevance show source text

Cited sections

• City of Alturas Zoning Ordinance, Article IV — General Development Standards (Table 28.41.020 referenced in text): **§ 28.41.020**. (Article IV)
• Setback rules and how to measure them: **§ 28.41.040**. (§ 28.41.040)
• Height limits and measurement: **§ 28.41.050**. (§ 28.41.050)
• Accessory structures and single family dwelling accessory limits (garages, workshops, sheds, barns): **§ 28.38.050**. (§ 28.38.050)
• Secondary dwelling (ADU/JADU) size table: **§ 28.38.040**, Table 28.38.040. (§ 28.38.040)
• Zone descriptions and densities (AG, RR, R1, R2, R3): **§ 28.21.020**. (§ 28.21.020)
• Overlay Districts, Downtown Historic (-DH) exceptions (zero front setback, no min lot size): **§ 28.23.050(C)**. (§ 28.23.050)
• Site plan rules and relationship to other permits: **§ 28.42.010 – § 28.42.030**. (§ 28.42.010)
• Variance criteria and procedures: **§ 28.52.050**. (§ 28.52.050)
• Fence/wall rules (height, prohibited materials): **§ 28.41.060**. (§ 28.41.060)
• Local parking references (used in several special‑use rules): Article IV, Division 6 (see campground example **§ 28.37.020**). (Article IV)
• Alturas_ZoningCode.md

• Official Alturas code library