Tustin — Zoning

Last reviewed: July 2, 2026

Overview

The City of Tustin’s zoning ordinance (the adopted Precise Zoning Plan) establishes the list of local zoning districts, their permitted and conditional uses, and the site development standards that apply in each district. The ordinance incorporates a single official map titled "ZONING MAP OF THE CITY OF TUSTIN" and implements residential, commercial, industrial, planned, and overlay/combining districts. Key programmatic rules (lot area, height, setbacks, conditional-use triggers and combining districts) live in the Zoning Chapter and the residential and industrial site standards tables. See § 9211—§ 9252 for the foundational rules.

District-by-district below summarizes what the Tustin ordinance actually says (purpose, typical permitted uses, key dimensional standards, and where the rules are stated). Where the ordinance text available in the retrieved materials does not supply a specific item, I mark it "Not found in retrieved materials" and show the controlling §.

Note on related procedures: development standards and numeric setbacks are presented in Table 1 under § 9220; appeals, zoning administration and minor adjustments are covered elsewhere in the Chapter. For design-review triggers and parking requirements consult the city's guidance on design review and parking. Where the word "development standards" appears below it links to Tustin Development Standards. References to accessory dwelling units use the city's ADU page Tustin ADUs. When the ordinance refers to the state construction code, consult the California Building Standards Code.

How the map and boundaries work

• The boundaries and district names are those shown on the official zoning map, incorporated by reference into the ordinance; where a boundary is unclear the ordinance defaults to nearest street or lot line and treats split lots as in the more restrictive zone. § 9213(c)–(d).

• Prezoning for unincorporated territory and the "U" Unclassified district rules are also included in § 9213(e).

District-by-district breakdown

(Each district heading below uses the district label the ordinance uses. Bolded district names and key standards; code references follow each district paragraph.)

RA — Residential Agricultural District

Purpose & typical uses: small-lot single-family residential and limited agricultural/animal uses; home occupations allowed. See § 9221 for permitted and conditional uses.

Key dimensional rules (from Table 1 / residential standards): minimum lot area 7,200 sq. ft., minimum lot width 60 ft., lot coverage 40%, building height 30 ft., front yard 20 ft., interior side yard 5 ft., corner side 10 ft., rear yard 5 ft. (with special rear open-space rules). See § 9220 (Table 1).

Where it applies / special rules: Animal keeping and larger rural lots have separate minimums and setbacks in the same district text. Conditional uses include places of worship, schools and similar uses subject to a CUP. See § 9221(b).

E4 — Residential Estate District

Purpose & typical uses: large-lot single-family, accessory buildings, home occupations, employee housing, and ADUs / JADUs (subject to § 9279). See § 9222(a).

Key dimensional rules: maximum height 25 ft. (for primary residence), maximum lot coverage—30% of rear yard for accessory structures, minimum building site/lot area 10,000 sq. ft. (or 7,500 sq. ft. per family unit where noted), minimum lot width 80 ft., setbacks and percent-of-lot rules are in Table 1 and § 9222. See § 9220 and § 9222.

R1 — Single-Family Residential District

Purpose & typical uses: single-family dwellings and accessory uses; guest quarters and certain institutional uses may be conditional. Specific R1 standards are stated in the R-series sections and in Table 1. See § 9220 and the R-series entries in Part 2.

Key dimensional rules: Refer to Table 1 (§ 9220) for minimum lot area/width, typical front yard 20 ft., interior side yard 5 ft., rear yard 5–20 ft. depending on use. For precise numeric values and exceptions use Table 1 and the R1 district subsection.

(If you need the R1 subsection text verbatim, verify with the jurisdiction—some R1 specifics were not included in the retrieved snippets.) Not found in retrieved materials: a single contiguous snippet labeled “§ 9224 – R1” with the full table values; rely on § 9220 Table 1 and § 9226 cross-references.

R2 — Duplex Residential District

Purpose & typical uses: two-unit residential buildings, accessory uses and home occupations. Key dimensional standards are in Table 1 (§ 9220). Not all R2-specific paragraphs were present in the retrieved text; consult § 9220 and the R-series district text for detail.

R3 — Multiple Family Residential District

Purpose & typical uses: multifamily apartments/condominiums and related uses; private open-space requirements apply to dwelling units. See § 9226 for R3-specific standards (e.g., private outdoor open space minimums).

Key dimensional rules and special limit: R3 has general height allowances but contains a local protective restriction: where an R3 lot abuts or faces RA, E4 or R1, main buildings within 50 ft. of that property line may not exceed two stories / 30 ft. unless the Planning Agency grants a CUP (a buffering/compatibility rule). See § 9226(c).

R4, PD, MPH (Suburban Residential, Planned Development, Mobilehome Park)

These districts are listed in § 9213(a) and have development standards in Part 2 and Table 1. Specific subsection text for R4, PD, and MPH were not fully included in the retrieved excerpts—consult § 9220 (Table 1) and the district-specific subsections in Part 2 for exact setbacks and lot-area rules. Not found in retrieved materials: full text for each of these district subsections.

Pr — Professional District; C1, C2, C3, CG — Commercial Districts

Purpose & typical uses: retail, central commercial, heavy commercial, professional office, and commercial general uses as enumerated in § 9213 and the commercial district subsections. Permitted and conditional uses differ by C-category; see the district subsections in Part 3 and Table 1 for dimensional standards.

Key dimensional rule examples in the ordinance: where properties front on designated highways, larger building lines may apply—see the highway setback matrix referenced in the code (building lines for primary/secondary highways) and § 9271(u) cross-reference. Front-yard/side-yard rules for commercial and industrial districts are modified by highway frontage rules; consult the highway table in the ordinance.

PM — Planned Industrial District; M — Industrial District

Purpose & typical uses: industrial, manufacturing, warehousing and associated uses; PM is a planned industrial zone with minimum lot area and more prescriptive standards. See § 9241 (PM) and § 9242 (M).

Key dimensional rules (Table 1 / industrial standards): PM minimum lot area 20,000 sq. ft., lot width 100 ft., building height up to 50 ft., front yard 25 ft., interior side yard 3 ft., rear yard 10 ft.; M district may allow 100% lot coverage and 50 ft. building height with limited setbacks. See § 9240 Table 1 and § 9241–9242.

PI — Public & Institutional; PC — Planned Community; U — Unclassified

Purpose & typical uses: government, public facilities, institutional uses (PI); master-planned mixed uses under PC; U is a placeholder for prezoned/unclassified territory. Development standards for PI/PC are established by CUP or the PC adoption. See § 9213 and the district subsections in Part 4.

SP 1 (Tustin Legacy Specific Plan District) — SP 1

Purpose & typical uses: This district implements the separate Tustin Legacy Specific Plan and replaces typical city development standards within its boundaries. All property within SP 1 is regulated by the specific plan text and maps that the City incorporated by reference. See § 9246(a)–(d).

If your parcel is in SP 1, the Specific Plan controls many elements typically found in the zoning chapter (use lists, heights, frontage standards). See the SP1 provision requiring compliance with the Tustin Legacy Specific Plan (adopted as Exhibit B to the ordinance). Verify against the SP1 map on the official zoning map.

Combining & Overlay Districts — P, CR, HO

• Combining Parking District (P): When applied, the P combines with the base district; uses remain those of the base zone but may adjust landscaping/parking layout rules. See § 9251.

• Cultural Resource District (CR): Purpose is historic/cultural preservation and compatibility; it modifies design approval and restricts incompatible uses. See § 9252 and the historic preservation parts of the code; consult the city's historic preservation page for process.

• Housing Overlay (HO) and other overlays: listed in § 9213(b); specific overlay rules are set where each overlay appears on the zoning map. See § 9213(b).

(For a city-level listing of overlays and process, see the city's overlay summary at Tustin Overlay Districts.)

Quick reference table — most decision-relevant standards (excerpt)

Checklist

• Confirm the parcel's exact zoning on the official ZONING MAP OF THE CITY OF TUSTIN (map incorporated into the ordinance per § 9213(c)).
• Read the base-district permitted and conditionally permitted uses for that district (see corresponding district subsection, e.g., § 9222 for E4).
• Pull the numeric standards from Table 1 in § 9220 for lot area, width, coverage, height and setbacks.
• If in SP1, obtain the Tustin Legacy Specific Plan text and maps (SP1 supersedes ordinary zoning standards) per § 9246(d).
• Check for overlay or combining districts (P, CR, HO) applied to the parcel and their special rules (§ 9251–9252).
• Confirm whether proposed use triggers a Conditional Use Permit, Minor Adjustment, Variance, or Design Review; see administrative rules (Zoning Administrator duties and minor adjustments) in the code.
• Confirm parking and landscaping requirements with the city’s parking and landscaping and screening pages.

Risks & Ambiguities

Plain-English Summary

Tustin’s zoning ordinance assigns each property to a named district on the official zoning map (for example RA, E4, R1, C1, PM, SP1), and each district lists what you can build and the numeric rules (lot area, height, setbacks) in Table 1 of § 9220 and the district subsections. Overlays like CR (Historic/Cultural Resource) and P (parking) modify the base rules; the SP1/Tustin Legacy area follows its own Specific Plan instead of the standard district rules. Always check the official zoning map and the district subsection that applies to your parcel before assuming permitted uses.

Source References

• Zoning adoption and district list: § 9211–§ 9213 — Precise Zoning Plan and district enumeration.
• Residential site development standards and Table 1: § 9220 (Table 1) — primary residential dimensional standards (lot area, width, coverage, height, setbacks).
• Residential Estate District (E4): § 9222 (permitted uses, heights, ADU allowance cross-ref § 9279).
• Multiple-family standards and R3 specifics (open space, height buffer): § 9226.
• Industrial / Planned Industrial Districts: § 9240–§ 9242 (Table 1 and PM text).
• Tustin Legacy Specific Plan District: § 9246 (SP 1 supersession and applicability).
• Combining and overlay districts (P, CR, HO): § 9213(b); § 9251–§ 9252.
• Zoning Administrator powers, minor adjustments, variances: administrative and appeals rules in the zoning chapter (Zoning Administrator duties). Notable text in the administrative sections.

Note: The full official zoning map and the complete district subsections are the final authoritative sources; verify parcel-specific conditions with the Community Development Department. Where a specific subsection text was not available in the retrieved materials I have annotated "Not found in retrieved materials" and cited the governing part of the code to consult.

Retrieved passages

• Tustin Zoning Code (Chapter by) High relevance show source text
• Tustin Zoning Code High relevance show source text
• Tustin Zoning Code (CHAPTER The) Medium 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 (Section of) Medium relevance show source text
• Tustin Zoning Code (section shall) Medium relevance show source text
• Tustin Zoning Code (Section 9271u.) Medium relevance show source text

Cited sections

• Zoning adoption and district list: **§ 9211–§ 9213** — Precise Zoning Plan and district enumeration. (§ 9211)
• Residential site development standards and Table 1: **§ 9220** (Table 1) — primary residential dimensional standards (lot area, width, coverage, height, setbacks). (§ 9220)
• Residential Estate District (E4): **§ 9222** (permitted uses, heights, ADU allowance cross-ref **§ 9279**). (§ 9222)
• Multiple-family standards and R3 specifics (open space, height buffer): **§ 9226**. (§ 9226)
• Industrial / Planned Industrial Districts: **§ 9240–§ 9242** (Table 1 and PM text). (§ 9240)
• Tustin Legacy Specific Plan District: **§ 9246** (SP 1 supersession and applicability). (§ 9246)
• Combining and overlay districts (P, CR, HO): **§ 9213(b)**; **§ 9251–§ 9252**. (§ 9213)
• Zoning Administrator powers, minor adjustments, variances: administrative and appeals rules in the zoning chapter (Zoning Administrator duties). Notable text in the administrative sections.
• Tustin_ZoningCode.md

• Official Tustin code library