Local zoning · Shasta County

Shasta County — Development Standards

Development Standards under the Shasta County local zoning and planning code, with the controlling citations.

Ask a question free See coverage

Last reviewed: July 3, 2026

Overview

This page summarizes the Development Standards that apply in the unincorporated areas of Shasta County under Title 17 (Zoning). It focuses on district-level dimensional rules (setbacks, heights, minimum lot area, density rules, accessory building limits) and countywide standards that control building placement and bulk — not the California Building Standards Code or construction permit procedures. Title 17 applies throughout the county's unincorporated territory (applicability) — see § 17.02.015 for scope and applicability.

Before you dig into design or permit submittals, note that Shasta County separates zoning rules (Title 17) from county development/fire/health standards and building code work; confirm parcel-specific combining districts and overlay rules (for example design review, scenic highway, NRA overlays) early in pre-application. See the county zoning overview here for context: Shasta County zoning & planning overview.

How to read this page

  • Every district subsection names the official district label used in Title 17 (for example R-1, R-2, R-3, R-R, OS, PD, C-O, M-L), summarizes purpose/tip uses, and lists the key measurable standards (front/side/rear setbacks, heights, minimum lot area/density). Where the code uses a general standard (Chapter 17.84 - General Development Standards) I call that out and cite that section.

  • When the code does not state a particular numeric standard (for example explicit FAR or lot coverage limits for a district), I label that "Not found in retrieved materials" — verify with the county. Verify parcel-specific combining districts and overlay requirements with the jurisdiction. See the county's overlay list in § 17.02.025.

  • Related topics you'll likely need during a project: Shasta County Parking, Shasta County Design Review, Shasta County Overlay Districts, Shasta County ADUs (ADU rules are in Chapter 17.88 with state constraints), and the California Building Standards Code (for construction standards).

District-by-district development standards (selected principal districts)

Notes: All subsections apply only in the unincorporated areas governed by Shasta County Title 17. I give the controlling code cross-reference (section number) for the principal numeric standards cited.

R-1 — One-Family Residential (R-1)

  • Purpose / typical uses: single-family residences (including permitted mobile/manufactured homes on foundation), accessory uses, supportive/transitional housing and one ADU when a primary dwelling exists. See § 17.30.020.
  • Key dimensional standards (where specified):
    • Minimum building site / typical lot rules: not shown as a single number in the excerpt — verify parcel-by-parcel (see building site rules, § 17.84.010).
    • Setbacks: front 20 ft (with a 15 ft exception when a side-swing garage faces the side), side 5 ft one side / 12 ft the other (pre-1978 lots: 5 ft both sides), rear 15 ft. See § 17.30.020 and the site standards excerpt.
    • Height: main building maximum 30 ft (typical residential main building standard in R districts) and accessory one-story height caps noted elsewhere; check § 17.84.030 for exceptions.
  • Where it applies: urban/suburban residential areas consistent with UR/SR general plan designations. § 17.30.010.

R-2 — Two-Family Residential (R-2)

  • Purpose / typical uses: one- and two-family residences, townhouses, supportive/transitional housing and small residential-care/daycare uses. § 17.34.020.
  • Key dimensional standards (site development — § 17.34.060):
    • Minimum lot area: interior 5,445 sq ft, corner 6,000 sq ft.
    • Setbacks: front 20 ft; side 5 ft one side / 12 ft the other (pre-1978 lots: 5 ft both sides); rear 15 ft; interior yard area min 20% of lot area.
    • Height: main building 30 ft; accessory one-story not to exceed 15 ft.
  • Where it applies: urban/suburban and mixed-use plan areas (UR, SR, MU). § 17.34.010.

R-3 — Multiple-Family Residential (R-3)

  • Purpose / typical uses: higher-density multi-family housing, to meet regional housing needs (allowed supportive housing, transitional housing, group homes, etc.). § 17.36.010 – .040.
  • Key dimensional standards (site development — § 17.36.060):
    • Minimum gross lot size: 8,000 sq ft (unless 17.84.010 modifies).
    • Minimum lot width: interior 75 ft, corner 80 ft.
    • Density: residential density is measured in units per gross acre; maximums are set on the zoning map or by the general plan; the minimum urban density is 80% of the maximum. Density increases are possible under the county density bonus provisions or PD approvals. § 17.36.060(B) and county density bonus chapter.
    • Setbacks: front 20 ft; side 5 ft / 12 ft (pre-1978 lots: 5 ft each side); rear 10 ft.
    • Height: see district maximums and countywide exceptions (default residential height language and exceptions in 17.84; many residential districts refer to 30–35 ft typical caps). Verify § 17.36.060 and countywide 17.84 for final measurement rules.

R-R — Rural Residential (R-R)

  • Purpose / typical uses: rural single-family living, low-intensity agriculture, town-center fringe areas. § 17.26.010–.020.
  • Key dimensional standards (site development — § 17.26.060):
    • Density / minimum lot area: variable — typical maximum density for slopes ≤30% is 1 du per 2 acres (except Centerville area where it may be 1 du per 3 acres). For >30% slope the max density is 1 du per 10 acres. Minimum lot area generally 2 acres, but increases to 5–10 acres in specified locations (see subsections).
    • Setbacks: front 30 ft; side 30 ft; rear 30 ft (these are the district standards subject to 17.84 exceptions).
    • Height: main building 35 ft; accessory building heights tier with distance from property line (20–35 ft scale).

OS — Open Space (OS)

  • Purpose / typical uses: protect greenbelts, river/creek corridors, natural resource protection, low-intensity recreation and forestry. § 17.16.010–.020.
  • Key dimensional standards (site development — § 17.16.060):
    • Minimum lot area: 20 acres when designated N-O in general plan (or as shown on map/use permit).
    • Setbacks: front 30 ft; side 30 ft; rear 30 ft.
    • Height: main building 35 ft; accessory building tiers based on distance from property line (20–35 ft tiers).

PD — Planned Development (PD)

  • Purpose / typical uses: flexible, site-specific development mixes with optional modifications to development standards when an integrated design approach and amenities are provided. PDs must meet PD chapter requirements and may adjust applicable development standards (waivers/adjustments permitted where justified). § 17.62.010–.040.
  • Key rules: PD proposals must comply with all applicable development standards except as specifically modified by the PD; PD approval often requires a binding plan and recorded agreements; PDs may include density bonuses tied to state law. § 17.62.030.

C-O — Office Commercial (C-O) (example commercial district)

  • Purpose / typical uses: professional/business/medical offices and related support uses. § 17.46.010–.020.
  • Key dimensional standards (site development — § 17.46.050):
    • Minimum building site: 10,000 sq ft (unless 17.84 modifies).
    • Lot width: interior 65 ft, corner 75 ft.
    • Setbacks: front 10 ft; interior side none (but 15 ft where abutting residential); street side 10 ft; rear none (but 15 ft where abutting residential).
    • Height: maximum 40 ft, with a one-story/20 ft limit within 40 ft of residential zones.

M-L — Light Industrial (M-L) (example industrial district)

  • Purpose / typical uses: light industrial, processing and similar uses where minimal nuisance impacts are expected. § 17.56.050 (site dev standards).
  • Key dimensional standards:
    • Minimum lot area: 20,000 sq ft.
    • Setbacks: front 10 ft, interior side none (but 20 ft where abutting residential), street side 10 ft, rear none (but 20 ft where abutting residential).
    • Height: max 45 ft, with a one-story/20 ft limit within 40 ft of residential.

Countywide / cross-cutting development rules and definitions

  • Yards / setback measurement rules: general yard rules and how to measure setbacks from public rights-of-way and plan lines are in § 17.84.020; preexisting buildings, corner/flag lots and special provisions for interior yard calculations are located there. § 17.84.020.
  • Building sites: rules for substandard lots, gross vs net acreage, and minimum building site exceptions are in § 17.84.010.
  • Accessory buildings and accessory dwelling units (ADUs):
    • ADU-specific development rules (unit size limits, setbacks exceptions, height limits relative to primary dwelling, parking standards, and exceptions) are in the ADU provisions in Chapter 17.88.132 and related ADU material; those rules must also be read together with state ADU law. See § 17.88.132 for ADU development standards and exceptions.
    • County ADU provisions note that ADUs must comply with the zone's development standards except for the listed exceptions and that height of a detached ADU may not exceed the one-family residence height limit for the zone. § 17.88.132.
    • For state ADU overrides and process timing, consult California ADU law; the county's ADU rules reference state standards. See the state ADU guidance (uploaded summary) for interactions.
  • Density and density bonuses: Title 17 defines density terms (gross and net) § 17.02.178 and has a county density-bonus chapter 17.83 that implements Government Code density bonus requirements. § 17.02.178 and § 17.83.030.
  • Parking: Parking requirements are handled in Chapter 17.86; district sections often point to Chapter 17.86 for parking minima. See each district's parking cross-reference (for example R-R, OS, R-2, etc. all reference Chapter 17.86). Link to the county parking page for project-level rules: Shasta County Parking.

Quick reference table — selected decision-relevant numeric standards

District Front setback Side setbacks Rear setback Height (main) Min lot area / lot width Typical permitted uses Code Reference
R-1 20 ft 5 ft / 12 ft (pre-1978: 5/5) 15 ft 30 ft (typical) See § 17.84.010 for exceptions Single-family, ADU, supportive/transitional housing § 17.30.020
R-2 20 ft 5 ft / 12 ft 15 ft 30 ft Interior 5,445 sf; corner 6,000 sf Duplexes, townhouses, supportive housing § 17.34.060
R-3 20 ft 5 ft / 12 ft 10 ft Check § 17.36.060 / 17.84 Min gross lot 8,000 sf; width interior 75 ft Multifamily (higher density) § 17.36.060
R-R 30 ft 30 ft 30 ft 35 ft main; accessory tiered Min lot commonly 2 acres, with location-based exceptions Rural single-family, low-intensity ag § 17.26.060
OS 30 ft 30 ft 30 ft 35 ft main; accessory tiers Min lot 20 acres (N-O) Forestry, greenbelt, low-intensity recreation § 17.16.060
C-O 10 ft none / 15 ft abutting res. none / 15 ft abutting res. 40 ft (reduced near residential) Min building site 10,000 sf Professional/business offices § 17.46.050
M-L 10 ft none / 20 ft abutting res. none / 20 ft abutting res. 45 ft (reduced near residential) Min lot area 20,000 sf Light industrial § 17.56.050

(Each district points you to countywide Chapters 17.84 (general development standards) and 17.86 (parking) for cross-cutting rules.)

Checklist — what an applicant must satisfy for a typical development in unincorporated Shasta County

  • Confirm the parcel's official zone district(s) and any combining or overlay districts (e.g., DR, SH, NRA-S) per the zoning map and § 17.02.025.
  • Confirm permitted use and whether the proposed use is outright, requires a zoning permit, administrative permit or a use permit (see the applicable district chapter—e.g., § 17.30.020, § 17.34.020, § 17.36.020).
  • Confirm minimum lot area, lot width, setbacks and height limits from the relevant district's site development standards (e.g., § 17.34.060 for R-2, § 17.36.060 for R-3).
  • Address countywide standards: yards/measurement (§ 17.84.020), building-site rules (§ 17.84.010), accessory buildings limits (§ 17.88.140) and ADU-specific standards (§ 17.88.132).
  • Demonstrate parking compliance (Chapter 17.86) and show required parking areas on the site plan; consult Shasta County Parking.
  • If seeking density bonuses or concessions, document required affordable-unit commitments and comply with § 17.83 (county density bonus rules) and state Government Code references.
  • If requesting exceptions/variances or PD modifications, provide findings consistent with § 17.92 (variances/permits) and PD criteria § 17.62.030.
  • Address fire-safety, environmental health (septic/water), roads and access — many zone approvals require compliance with county fire safety standards and environmental health requirements (referenced in ADU and second-residence sections). See ADU rules § 17.88.132 and second-residence requirements § 17.88.135.

Risks & Ambiguities

Issue Why it matters What to verify
Floor Area Ratio (FAR) / lot coverage figures The Title 17 excerpts and district site standards shown do not consistently list explicit FAR or lot coverage percentages for districts. Without explicit local FAR/coverage numbers, applicants can be surprised during plan check. Verify whether a particular district or combining district establishes lot coverage or FAR limits (Search full Title 17 or ask county planner). If absent, "Not found in retrieved materials" for explicit FAR values — verify with jurisdiction.
Parcel-specific combining districts / overlays Overlays like DR, SH, NRA-S can add stricter setbacks, design review, materials/height or color constraints. Confirm applicable overlays on the parcel via zoning map and cross-check the specific overlay chapter (see § 17.02.025).
ADU vs local height/coverage limits State ADU law constrains a local agency’s ability to use some development standards to preclude ADUs; county ADU rules reference state constraints. Misreading local ADU rules can delay approvals. Read Chapter 17.88.132 alongside state ADU law; county ADU rules give exceptions and cross-references to the building code. See § 17.88.132 and the ADU guidance file.
“Preexisting lot” and substandard lot treatment Title 17 allows substandard lots to be treated as a building site in some circumstances (e.g., all other standards met), and special setbacks apply to lots created before certain dates. Confirm whether parcel qualifies as "preexisting" and whether a variance or the § 17.84.010 test is required. See § 17.84.010 and § 17.84.020.
Fire, health, and road standards referenced but not detailed in Title 17 Title 17 defers to county fire-safety and environmental health standards in several places (e.g., ADU, second-residence rules). Failure to meet those non-zoning standards will block permits. Contact County Fire, Environmental Health and Public Works for requirements and reconcile with Title 17 references (e.g., ADU § 17.88.132 and second-residence § 17.88.135).

Plain-English summary (homeowner)

If your property is in unincorporated Shasta County, development standards you must meet (how far a building must sit from property lines, how tall it can be, and the minimum lot size for certain zones) are set in the county Zoning Ordinance (Title 17). For single-family lots the typical front yard is 20 feet and side yards are commonly 5 feet on one side and 12 feet on the other; multi-family and commercial zones have different numbers — always check the precise section for your zone (for example § 17.30 for R‑1, § 17.34 for R‑2, § 17.36 for R‑3). The county’s general standards (Chapter 17.84) and the district chapter that applies to your parcel are the controlling sources.

Source References

  • Title 17 — Zoning (Shasta County Code). See Title and applicability. § 17.02.005, § 17.02.015, § 17.02.020.
  • Chapter 17.30 — One‑Family Residential (R-1) (purpose, permitted uses, site standards). § 17.30.010–.020.
  • Chapter 17.34 — Two‑Family Residential (R-2) site standards. § 17.34.060.
  • Chapter 17.36 — Multiple‑Family Residential (R-3) site standards (minimum lot, setbacks, density language). § 17.36.060.
  • Chapter 17.26 — Rural Residential (R‑R) site standards (density, setbacks, height). § 17.26.060.
  • Chapter 17.16 — Open Space (OS) site standards (min lot area, setbacks, height). § 17.16.060.
  • Chapter 17.62 — Planned Development (PD) (ability to modify standards). § 17.62.030.
  • Chapter 17.84 — General Development Standards (yards, building sites). § 17.84.010, § 17.84.020.
  • Chapter 17.88 — Accessory building / ADU rules (ADU specifics in § 17.88.132; accessory buildings § 17.88.140).
  • Chapter 17.83 — Density Bonus (county implementation of state law). § 17.83.030.
  • For state ADU law and interpretation that interacts with Title 17, see the uploaded ADU guidance summary (California ADU guidance and handbook).

Sources

Retrieved passages

  • Shasta County Zoning Code (section 17.02.045) High relevance
  • Shasta County Zoning Code (Section 17.84.020) High relevance
  • Shasta County Zoning Code (§ 45) High relevance
  • Shasta County Zoning Code (§ 25) High relevance
  • Shasta County Zoning Code (§ 20) High relevance
  • CBC § 17.88.140 (Title 16) High relevance
  • Shasta County Zoning Code (§ 27) High relevance
  • Shasta County Zoning Code (§ 28) High relevance
  • Shasta County Zoning Code (§ 20) High relevance
  • Shasta County Zoning Code (Section 17.84.030) High relevance
  • CBC § 17.88.132 (Section 17.88.132) High relevance
  • CBC § 66314 (§ 66314) High relevance
  • Shasta County Zoning Code (Section 17.84.020) High relevance
  • Shasta County Zoning Code (§ 73) High relevance
  • Shasta County Zoning Code (Section 17.84.030) High relevance
  • Shasta County Zoning Code (§ 39) Medium relevance
  • Shasta County Zoning Code (§ 5.02.160) High relevance
  • Shasta County Zoning Code (§ 5.02.130) High relevance
  • Shasta County Zoning Code (§ 8) High relevance
  • Shasta County Zoning Code (§ 44) High relevance

Cited sections

Frequently asked questions

What can I build on an R‑1 lot in Shasta County?

On an R‑1 lot you can build a one‑family residence (and certain permitted accessory uses). A mobile home on a foundation may be allowed per local standards; you may have a second legal one‑family residence subject to § 17.88.135 and one ADU where a primary dwelling exists (see § 17.30.020 and ADU rules § 17.88.132). Always confirm setbacks/minimum lot rules that apply to your parcel.

What are Shasta County setback requirements for residential zones?

Setbacks are district‑dependent. Typical numbers: R‑1 front 20 ft, side 5 ft / 12 ft, rear 15 ft; R‑2/R‑3 front 20 ft, R‑3 rear may be 10 ft; R‑R uses larger 30 ft front/side/rear. Always check the district’s site development standard (for R‑1 see § 17.30.020; for R‑2 see § 17.34.060; for R‑3 see § 17.36.060; R‑R see § 17.26.060).

Do I need design review for my project in unincorporated Shasta County?

If your parcel is in a zone that includes the DR (Design Review) combining district or an overlay (for example a specific plan or scenic highway overlay), design review may be required; combining districts and overlays are listed in § 17.02.025. Check the zoning map and the combining district language; design review procedures are in the combining district chapter.

Are there lot coverage or FAR limits in the county zoning code?

Title 17 excerpts show district setbacks, heights and minimum lot sizes but do not consistently list numeric FAR or lot coverage across districts in the retrieved materials. When present, lot coverage or FAR will be specified in the district chapter or a combining district — otherwise "Not found in retrieved materials" for explicit countywide FAR figures; verify with the county planner. § 17.84 handles cross‑cutting site rules.

What is the maximum height allowed in residential zones?

Residential maximum heights are established in district sections and by countywide rules. Typical main‑building caps shown in the code are 30–35 ft (for example R‑2 and R‑1 reference 30 ft in their site standards; many districts use 35 ft as a cap for main buildings) and accessory buildings are often limited to lower one‑story heights (see district site standards and § 17.84.030 for exceptions). Verify the exact district section for your parcel.

Can I build an ADU and what setbacks/height apply?

County ADU rules (Chapter 17.88.132) require ADUs to comply with zone development standards except for enumerated ADU exceptions (size, parking, setbacks). A detached ADU may not exceed the height limit applied to a one‑family residence in the same zone; in many cases the county defers to state ADU law where state law preempts certain local restrictions. See § 17.88.132 and state ADU guidance for the interface.

How are density and density bonuses handled?

Title 17 defines density and implements density bonus provisions: density terms in § 17.02.178 and a county density‑bonus chapter 17.83 which implements Government Code density bonus law (applicants may receive bonuses, waivers or modifications consistent with state law). A PD may also adjust development standards when approved. See § 17.02.178 and § 17.83.030 and PD chapter § 17.62.030.

Where are parking rules and how do I demonstrate compliance?

Parking minima and design standards live in Chapter 17.86; individual district chapters reference Chapter 17.86 for parking requirements (for example R‑R, OS, R‑2 reference parking in their site development standard text). Provide a site plan showing required stalls and landscaped areas per 17.86 when applying. See the county parking page: Shasta County Parking.

If my lot is smaller than the district minimum, can I still build?

A legally created substandard lot can be considered a building site if either (1) all other development standards for the district are met (except lot size), or (2) a variance is approved — see § 17.84.010. That provision is commonly used to allow development on preexisting smaller lots, subject to compliance with other standards.

Do overlay districts change setbacks or height?

Yes. Combining and overlay districts (for example DR, SH, NRA-S, etc.) can impose additional or different standards. Confirm overlays on the parcel via the zoning map and check the overlay's sections; combining districts are listed in § 17.02.025.

More in Shasta County code

Ask about any Shasta County property

Get a cited, plain-English answer on Shasta County zoning, setbacks, FAR, ADUs and permits — for any address.

Start Free Trial

More Shasta County zoning topics

Shasta County Zoning

Shasta County Land Use

Shasta County Parking

Shasta County Design Review

Shasta County Overlay Districts

Shasta County Historic Preservation

Shasta County Signage

Shasta County Nonconforming Uses

Shasta County Variances and Exceptions

Shasta County Landscaping and Screening

Shasta County overview