Tustin — Land Use

Last reviewed: July 2, 2026

Overview

This page summarizes what the City of Tustin's zoning (Article 9 of the Tustin City Code, commonly referenced as the local "zoning code") says about permitted uses, conditionally permitted uses, and the primary site development rules that govern what you may do on a parcel. It is grounded in the City’s zoning districts and Table 1 site-development standards — see the code’s residential and commercial/industrial tables and district text for details (Table 1 is in § 9220 and § 9230/§ 9240) . Before a project starts verify the parcel zoning and any overlays on the official zoning map (verify with the City).

Note: for related technical requirements consult the City’s rules on parking, design review, overlay districts, and ADUs. For building code matters consult the California Building Standards Code.

District-by-district breakdown

Each subsection below names the local district in bold, gives the purpose, typical permitted uses, and the principal dimensional/development rules that control most decisions. Where the code lists both district text and a Table 1 entry, both are cited.

R-1 — Single‑Family Residential (§ 9223)

• Purpose: Preserve single‑family neighborhoods; permit detached single‑family living and accessory uses consistent with the residential site standards. See § 9223 for permitted uses and specifics.
• Typical permitted uses: single‑family dwellings, accessory buildings, home occupations, small family day care homes, employee housing, and ADUs/JADUs (subject to § 9279).
• Key dimensional standards: Table 1 for residential districts establishes the baseline: minimum lot area per unit 7,200 sq ft, minimum lot width 60 ft, building height 30 ft, front yard 20 ft, interior side yard 5 ft, rear yard 5 ft (with minimum clear 1,000 sq ft on rear ⅓) — see § 9220 Table 1 and § 9223 text for R‑1 exceptions (e.g., certain accessory building limits).
• Where it applies: See the zoning map; R‑1 rules apply citywide where parcels are mapped R‑1 (verify parcel zoning with the Community Development Dept).

E-4 — Residential Estate (§ 9222)

• Purpose: Larger‑lot residential estate lots with larger minimum areas and proportionally larger setbacks. See § 9222.
• Typical permitted uses: single‑family dwellings, accessory buildings, home occupations, ADUs/JADUs, and employee housing (subject to state H&S code).
• Key dimensional standards: Table 1 sets minimum lot area 10,000 sq ft, lot width 80 ft, height 30 ft, front yard 20 ft, side yards = 10% of lot width, rear yard = 20% of lot depth (but check § 9222 for exact percent rules).

RA — Residential Agricultural (§ 9221)

• Purpose: Allow low‑density residential with limited farming or animal keeping on larger parcels. See § 9221.
• Typical permitted uses: single‑family housing, ADUs, light farming / crop & tree farming, accessory uses and home occupations. Certain animal keeping allowed subject to minimum lot sizes.
• Key dimensional standards: Table 1 shows min lot area 7,200 sq ft per family / 7,200 sq ft base, front yard 20 ft, height 30 ft; special large‑animal provisions and larger front setbacks apply to certain animal uses — check § 9221 text.

R-2 — Duplex Residential (§ 9225)

• Purpose: Permit duplexes and small multi‑units while layering in R‑1 standards when applicable. See § 9225.
• Typical permitted uses: all R‑1 uses, duplexes or two detached single‑family dwellings; triplexes may be conditionally allowed under standards in § 9225.
• Key dimensional standards: Table 1 sets min lot area 7,200 sq ft, min lot width 60 ft, max lot coverage 50%, height 35 ft, front yard 20 ft, rear yard 10 ft. See § 9225 for height exceptions near lower‑density zones.

R-3 — Multi‑Family Residential (§ 9226)

• Purpose: Higher density multifamily housing with required open space and family‑unit mix rules. See § 9226.
• Typical permitted uses: duplex/R2 uses, multiple‑family dwellings and apartments; accessory uses and ADUs/JADUs per § 9279.
• Key standards: min lot area per unit 1,750 sq ft, min lot width 70 ft, lot coverage up to 65%, height 35 ft, front yard 15 ft, landscape open space 35%; large projects (6+ units) must include at least 5% three‑bedroom (large) units (round up) per § 9226.

R-4 — Suburban Residential (§ 9228)

• Purpose: Suburban‑scale residential flexibility including detached and some multi‑family forms. See § 9228.
• Typical permitted uses: single‑family, two‑family, multiple‑family dwellings, accessory uses, ADUs/JADUs per § 9279.
• Key standards: Table 1 indicates min lot area 7,200 / per-family 3,000 sq ft, height typically 2 stories or 35 ft, front yard 20 ft, and other setbacks per § 9228.

Professional (Pr) and Commercial Districts — C1 / C2 / C3 / CG / Pr (Part 3, § 9230‑§ 9235)

• Purpose: Range from office/professional to central commercial and general commercial. See § 9231 (Professional) and § 9232‑§ 9235 for commercial districts.
• Typical permitted uses:
  • Pr (§ 9231): professional offices, insurance, banks (no drive‑thru), certain small retail accessory to offices, some residential where specifically allowed.
  • C1 / C2 / C3 / CG (§ 9232‑§ 9235): retail, service, restaurants, specialty stores; CG allows a wide mix and includes uses listed in C2. Certain uses (e.g., manufacturing or warehousing) are restricted in CG and require CUP if proposed above thresholds.
• Key dimensional standards: Table 1 for commercial/industrial (§ 9230 / § 9230 Table 1) lists min lot area (C1 5,000 sq ft; C2 2,000 sq ft; CG 3,000 sq ft), height limits (typically 35 ft for PR/CG, 50 ft for C2/C3 and industrial as noted), and setback exceptions when abutting residential — see § 9230 Table and district text.

PM — Planned Industrial (§ 9241) and M — Industrial (§ 9242)

• Purpose: PM (§ 9241): planned / light industrial and research uses with specific permitted lists. M (§ 9242): heavier industrial uses with its own conditional use lists.
• Typical permitted uses:
  • PM: manufacturing, R&D labs, bulk merchandise, photographic/printing plants, parking lots, limited office accessory uses; alcoholic beverage off‑site sales under size/area limitations (see § 9241).
  • M: all PM permitted plus uses such as sexually‑oriented businesses (regulated), and additional conditional uses (see § 9242).
• Key standards: Table 1 for industrial (§ 9240/§ 9241 Table 1) shows PM min lot area 20,000 sq ft, height 50 ft, lot coverage 100% allowed, setbacks specific to Table 1. See § 9240 and § 9241.

U — Unclassified (§ 9243)

• Purpose & rule: In U (Unclassified) districts, all uses are permitted unless otherwise prohibited, but a Conditional Use Permit must first be secured for any use established in a U District — see § 9243. Verify permitted development criteria are set in the CUP.

PC — Planned Community, PI — Public & Institutional, SP‑1 (Tustin Legacy Specific Plan)

• PC and PI: development standards established at adoption of the PC/PI district; many standards are determined as part of the PD/PC process — see § 9244 and Table 1 notes.
• SP‑1 (Tustin Legacy Specific Plan) replaces citywide standards within its boundaries; all development there must follow the Tustin Legacy Specific Plan text (see § 9246).

Quick reference table — decision‑relevant standards and code references

How uses are treated (permitted vs conditional)

• If a use is listed under a district’s “Permitted Uses” it may be established subject to the district’s development standards (Table 1 and any district‑specific requirements) — see the multiple district texts above (e.g., § 9223, § 9235, § 9241).
• A use not listed may still be found “similar in character” and approved by the Director/Planning Commission; the code sets factors decision‑makers consider (public health/safety, traffic, orderly development, other facts) when making that determination — see the code’s Criteria for Use Determination text (retrieved) — exact section number not found in retrieved materials; see the code text for the full factor list.
• Many potentially impactful uses (e.g., hazardous waste facilities, large manufacturing, sex‑oriented businesses, alcohol sales above certain sizes) are expressly flagged as conditionally permitted and require a Conditional Use Permit (CUP) and findings — see district lists such as § 9241, § 9242, and the CUP procedure references in § 9291–9294.

Checklist — what an applicant must satisfy for a land‑use decision in Tustin

• Confirm the parcel zoning and any overlay(s) on the official City zoning map. (Verify with the City; overlay rules in § 9251–9252.)
• Confirm the proposed use appears as a permitted or conditionally permitted use in the district text (e.g., § 9223, § 9235, § 9241).
• Confirm site development standards in Table 1 (residential § 9220, commercial/industrial § 9230 / § 9240) and district text; plan setbacks, FAR/coverage, and building height to meet these numeric standards. See development standards.
• Determine whether the use triggers a Conditional Use Permit, design review, or other discretionary review; read the CUP & findings rules (§ 9291–§ 9294 and Part 7 regulations).
• Calculate parking demand and confirm off‑street parking requirements (refer to the City’s parking chapter — specific ratio details not quoted in these retrieved excerpts). Not found in retrieved materials: specific parking ratios for every use; consult the Parking chapter.
• If proposing an ADU/JADU, confirm eligibility, location, and unit counts per § 9279 and the ADU rules. See ADUs.
• Check for overlays such as the Cultural Resource (CR) or P (Combining Parking) that may add or change standards (see § 9251–9252). See overlay districts.
• Verify whether your proposal needs design review — see design review and the code’s design standards list (materials, setbacks, landscaping, lighting).
• For building code and structural compliance consult the California Building Standards Code.

Risks & Ambiguities

Plain‑English Summary

Tustin’s zoning code lists what’s allowed in each mapped district: the R zones are for houses (single‑family to multifamily), C/Pr zones for offices and retail, and PM/M for industrial uses. Table 1 (residential and commercial/industrial tables) provides the numeric rules—lot area, setbacks, height—and many uses are either permitted outright in a district or allowed only with a Conditional Use Permit; overlays and the Tustin Legacy Specific Plan can replace or add standards. Check the district text (e.g., § 9223, § 9235, § 9241) and consult the City for parcel‑specific verification.

Source References

• § 9220 — Residential site development standards (Table 1) (Tustin Zoning Code)
• § 9221 — Residential Agricultural District (RA) text (permitted uses & standards)
• § 9222 — Residential Estate District (E4) text (permitted uses & standards)
• § 9223 — Single‑Family Residential District (R‑1) text (permitted uses & standards)
• § 9225 — Duplex District (R‑2) text (permitted uses & standards)
• § 9226 — Multiple Family District (R‑3) text (permitted uses & standards)
• § 9228 — Suburban Residential District (R‑4) text (permitted uses & standards)
• § 9230 / Table 1 — Commercial site development standards (commercial table excerpts)
• § 9231–§ 9235 — Professional and Commercial district texts (Pr, C1, C2, CG)
• § 9240 / § 9241 / § 9242 — Industrial district site standards and PM/M district texts (Table 1 industrial entries)
• § 9243 — Unclassified District (U) (CUP rule)
• § 9246 — Tustin Legacy Specific Plan district (SP‑1) text (specific plan replaces typical standards within its area)
• § 9279 — ADU/JADU provisions (city ADU rules excerpt)
• CUP procedures, conditional uses and revocation factors — Part 7 and CUP sections referenced in the code (see CUP & revocation text)
• Criteria for Use Determination (retrieved text; decision factors for similar/unlisted uses) — retrieved but explicit § number not shown in the excerpt (see Criteria text).

If you want, I can:

• Pull up the exact recorded zoning for a specific parcel in Tustin and list all applicable overlays and restrictions (you’ll need to provide the parcel/APN or street address).
• Draft the minimal compliance checklist for a proposed use (e.g., a 6‑unit apartment, or a restaurant) including exact parking ratios if you tell me the use.

Retrieved passages

• Tustin Zoning Code (Section 9240) High relevance show source text
• Tustin Zoning Code (Section 9271aa.) High relevance show source text
• Tustin Zoning Code (Section 9220) High relevance show source text
• Tustin Zoning Code (Section 9271kk) High relevance show source text
• Tustin Zoning Code (Section 9230) High relevance show source text
• Tustin Zoning Code (Section 9403d) High relevance show source text
• Tustin Zoning Code (Section 9271u.) High relevance show source text
• Tustin Zoning Code (Section 9220) High relevance show source text
• Tustin Zoning Code (Section 9220) High relevance show source text
• Tustin Zoning Code (Section 9220) High relevance show source text
• Tustin Zoning Code (Section 9252j) High relevance show source text
• Tustin Zoning Code (Section 9220) Medium relevance show source text
• Tustin Zoning Code Medium relevance show source text
• Tustin Zoning Code (Chapter pertaining) Medium relevance show source text
• Tustin Zoning Code (chapter pertaining) Medium relevance show source text
• Tustin Zoning Code (Section 9271u.) Medium relevance show source text
• Tustin Zoning Code (Chapter 3) Medium relevance show source text

Cited sections

• § 9220 — Residential site development standards (Table 1) (Tustin Zoning Code) (§ 9220)
• § 9221 — Residential Agricultural District (RA) text (permitted uses & standards) (§ 9221)
• § 9222 — Residential Estate District (E4) text (permitted uses & standards) (§ 9222)
• § 9223 — Single‑Family Residential District (R‑1) text (permitted uses & standards) (§ 9223)
• § 9225 — Duplex District (R‑2) text (permitted uses & standards) (§ 9225)
• § 9226 — Multiple Family District (R‑3) text (permitted uses & standards) (§ 9226)
• § 9228 — Suburban Residential District (R‑4) text (permitted uses & standards) (§ 9228)
• § 9230 / Table 1 — Commercial site development standards (commercial table excerpts) (§ 9230)
• § 9231–§ 9235 — Professional and Commercial district texts (Pr, C1, C2, CG) (§ 9231)
• § 9240 / § 9241 / § 9242 — Industrial district site standards and PM/M district texts (Table 1 industrial entries) (§ 9240)
• § 9243 — Unclassified District (U) (CUP rule) (§ 9243)
• § 9246 — Tustin Legacy Specific Plan district (SP‑1) text (specific plan replaces typical standards within its area) (§ 9246)
• § 9279 — ADU/JADU provisions (city ADU rules excerpt) (§ 9279)
• CUP procedures, conditional uses and revocation factors — Part 7 and CUP sections referenced in the code (see CUP & revocation text)
• Criteria for Use Determination (retrieved text; decision factors for similar/unlisted uses) — retrieved but explicit § number not shown in the excerpt (see Criteria text). (§ number)
• Pull up the exact recorded zoning for a specific parcel in Tustin and list all applicable overlays and restrictions (you’ll need to provide the parcel/APN or street address).
• Draft the minimal compliance checklist for a proposed use (e.g., a 6‑unit apartment, or a restaurant) including exact parking ratios if you tell me the use.
• Tustin_ZoningCode.md

• Official Tustin code library