Local zoning · Antioch

Antioch — Zoning

Zoning under the Antioch local zoning and planning code, with the controlling citations.

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Last reviewed: July 1, 2026

Overview

Antioch’s zoning rules live in the City of Antioch Municipal Code, Title 9, Chapter 5: Zoning Ordinance. The code establishes base zoning districts, special and overlay districts, and a legally adopted zoning map, and it ties each district to allowed uses and measurable site standards like height, setbacks, and lot coverage. When you plan a project in Antioch, start with your parcel’s mapped district, check the allowed uses and dimensional standards, and then layer in any applicable overlays, land use approvals, development standards, parking, and design review requirements.

Antioch’s zoning code identifies its components (regulations and an adopted zoning map), assigns review authority to the Planning Commission/Zoning Administrator, and provides rules to resolve uncertain boundaries. The zoning map is part of the ordinance by reference and must be consistent with the General Plan. See § 9-5.102 on code components, § 9-5.3601 on the zoning map, § 9-5.2508 on review authority, and § 9-5.3701 on boundary determinations.

How Antioch organizes zoning

  • Title and scope: Title 9, Chapter 5 is the “zoning code of the city” and implements the General Plan through mapped districts and regulations.
  • Zoning map: The “Zoning Map for the City of Antioch, California” is incorporated by reference; district boundaries must remain consistent with the General Plan.
  • Land use tables and development metrics: Allowed uses are organized in the Table of Land Use Regulations; heights, setbacks, and coverage are in Table 9-5.601.
  • Objective design standards: Residential projects are also subject to adopted objective design standards reviewed through design review.

Base Districts and Overlays — District-by-District

Below are Antioch’s districts exactly as summarized in § 9-5.3801, with typical uses and measurable standards referenced to the land use table (§ 9-5.3803) and the height/area/setback table (§ 9-5.601). Always verify the mapped district for your parcel on the official Antioch zoning & planning overview page and the city’s adopted Zoning Map.

RE — Rural Estate District

  • Purpose and where it applies: Very low-density residential areas (0–2 du/acre) at the edge of the city’s urban form. Mapped per the city’s zoning map.
  • Typical permitted uses: Residential and related low-intensity uses per the Table of Land Use Regulations. ADUs are allowed by administrative permit in residential districts.
  • Key dimensional standards: Set “through Planned Development process” in Table 9-5.601 (RE row shows PD-based standards); front/side/rear setbacks follow the citywide table and footnotes, including street-class-based front setbacks and a minimum 20 ft garage setback.

RR — Rural Residential District

  • Purpose and where it applies: Similar to RE, 0–2 du/acre very low-density areas.
  • Uses: As listed in § 9-5.3803; ADUs allowed administratively.
  • Standards: Established through PD; see Table 9-5.601 notes and citywide setback footnotes.

R-4 — Single-Family Low Density Residential (2–4 du/acre)

  • Purpose/where: Traditional single-family lots in established neighborhoods and new subdivisions.
  • Uses: Single-family dwellings; ADUs allowed administratively; see use table for other residential/support uses.
  • Standards: 35 ft max height; 6,000 sf min lot; 40% lot coverage; side yard 5 ft; rear yard 20 ft; front yard varies by street class (local: 20 ft typical). Garage faces must be at least 20 ft from the property line.

R-6 — Single-Family Low Density Residential (4–6 du/acre)

  • Uses: Similar to R-4; ADUs allowed administratively.
  • Standards: 35 ft height; 6,000 sf min lot; 40% coverage; side 5 ft; rear 20 ft; street-class-based front setbacks; 20 ft minimum garage face setback.

R-10 — Medium Density Residential (6–10 du/acre)

  • Uses: Medium-density residential; ADUs allowed administratively.
  • Standards: 45 ft height; 6,000 sf min lot; 40% coverage; side 5 ft; rear 10 ft; front setbacks vary by street class (multi-family fronts may be less than single-family).

R-20 — Medium Density Residential (11–20 du/acre)

  • Uses: Multi-family emphasis. Note: New single-family dwellings (other than replacements) are prohibited in R-20; existing single-family homes are conforming. ADUs are allowed administratively.
  • Standards: 45 ft height; 20,000 sf min lot; 40% coverage; side 5 ft; rear 10 ft; street-class-based fronts.

R-25 — High Density Residential (20–25 du/acre)

  • Uses: Multi-family; new single-family prohibited (except replacement). ADUs allowed administratively.
  • Standards: 45 ft height; 20,000 sf min lot; 50% coverage; side 5 ft; rear 10 ft (with special adjacency rule to RR/RE/R-4/R-6 requiring 20 ft); fronts per street class.

R-35 — High Density Residential (30–35 du/acre)

  • Uses: High-density multi-family; new single-family prohibited (except replacement). ADUs allowed administratively.
  • Standards: 45 ft height; 20,000 sf min lot; 50% coverage; side 5 ft; rear 10 ft (with adjacency 20 ft rule); fronts per street class.

PBC — Planned Business Center District

  • Purpose/where: Planned commercial centers serving multiple neighborhoods; mapped citywide per zoning map.
  • Uses: Business and retail center uses per Table of Land Use Regulations.
  • Standards: 35 ft height; 20,000 sf min site; 35% coverage; side 0 ft; fronts and rears per Table 9-5.601.

C-0 — Professional Office District

  • Purpose/where: Small-scale professional/administrative offices.
  • Uses/Standards: Allowed uses per Table 9-5.3803; dimensional standards per Table 9-5.601 (specific numeric values not found in retrieved snippet). Not found in retrieved materials for exact numeric standards; verify with the jurisdiction.

C-1 — Convenience Commercial District

  • Purpose/where: Neighborhood-serving retail and services.
  • Uses/Standards: See § 9-5.3803 for uses; standards per Table 9-5.601. Numeric standards not found in retrieved materials. Verify with the jurisdiction.

C-2 — Neighborhood/Community Commercial District

  • Purpose/where: Community-scale retail/service locations.
  • Uses/Standards: Uses per § 9-5.3803; standards per Table 9-5.601. Numeric standards not found in retrieved materials. Verify with the jurisdiction.

C-3 — Regional Commercial District

  • Purpose/where: Regional retail nodes and freeway-oriented commerce.
  • Uses/Standards: Uses per § 9-5.3803; standards per Table 9-5.601. Numeric standards not found in retrieved materials. Verify with the jurisdiction.

MCR — Mixed Commercial/Residential District

  • Purpose/where: Mixed-use main streets and corridors with housing above/with commercial.
  • Uses/Standards: Mixed-use allowed per land use table; objective multi-family design standards also apply. Dimensional standards per Table 9-5.601. Numeric standards not found in retrieved materials. Verify with the jurisdiction.

WF — Urban Waterfront District

  • Purpose/where: Waterfront-oriented urban uses consistent with the Downtown/riverfront setting.
  • Uses/Standards: Uses per § 9-5.3803; standards per Table 9-5.601 and the Downtown Specific Plan where applicable.

OS — Open Space/Public Use District

  • Purpose/where: Parks, open space, and civic/public use lands.
  • Uses/Standards: As listed in § 9-5.3803; development metrics per Table 9-5.601. Numeric standards not found in retrieved materials. Verify with the jurisdiction.

M-1 — Light Industrial District

  • Purpose/where: Manufacturing, assembly, and compatible industrial services.
  • Uses/Standards: See § 9-5.3803 for uses; dimensional standards per Table 9-5.601 (specific numeric values not found in retrieved snippet). Verify with the jurisdiction.

M-2 — Heavy Industrial District

  • Purpose/where: Heavier manufacturing and industrial operations.
  • Uses/Standards: Uses per § 9-5.3803; standards per Table 9-5.601. Numeric standards not found in retrieved materials. Verify with the jurisdiction.

H — Hospital/Medical Center Overlay District

  • Purpose: Overlay to guide hospital/medical center development. Uses follow base zone with overlay rules.
  • Uses/Standards: See § 9-5.3803; overlay modifies base zoning as specified.

PD — Planned Development District

  • Purpose: Custom zoning for large or complex sites; the final development plan sets the site-specific standards (setbacks, heights, lot sizes).
  • Uses/Standards: Any use otherwise permitted in the city may be included if shown in the approved final plan and consistent with the General/Specific Plan; modifications require City Council action.

HPD — Hillside Planned Development District

  • Purpose: Planned development tailored to hillside conditions. All uses require a use permit.
  • Standards: Established through the PD approval for the site.

T — Manufactured Housing Combining District

  • Purpose: Combining district for manufactured housing. All uses require a use permit.
  • Uses/Standards: See § 9-5.3803 and any project-specific approvals.

SH — Senior Housing Overlay District

  • Purpose: Applies to projects approved before the overlay’s effective date; those projects continue under their approvals. Future amendments process under current code. All uses require a use permit.

ES — Emergency Shelter Overlay District

  • Purpose: Allows emergency shelters by right when standards in § 9-5.3835 are met; otherwise base-zone rules apply.
  • Uses: Emergency shelters permitted by right within ES; see § 9-5.3803 note 9.

CB — Cannabis Business Overlay Districts (CB 1, CB 2 Downtown Antioch, CB 3 Somersville)

  • Purpose: Constrain where cannabis businesses may locate and what types are allowed by area; CB 1 allows the broadest range; CB 2/CB 3 allow storefront retail only.
  • Uses/Permits: A City Council use permit is required, with operating agreements and conditions; only allowed within CB overlays.

TH — Transitional Housing Overlay District

  • Purpose: Overlay supporting transitional housing, with uses regulated per overlay and base zone.
  • Uses/Standards: See land use table for specifics.

CIH — Commercial Infill Housing Overlay District

  • Purpose: Commercial infill sites allowing residential per adopted objective standards.
  • Uses/Standards: Governed by CIH objective design standards; see Table 9-5.601 references to CIH.

IH — Innovative Housing Overlay District

  • Purpose: Enables “cottage communities” (clusters of small dwellings, including ADUs) on qualifying sites, with ministerial review if inside the IH overlay. Often aimed at religious institution properties with affordability commitments.
  • Uses/Standards: 100% affordable (with limited moderate/staff allowances), minimum three cottages; density up to 15 du/ac by right; unit sizes 150–1,200 sf; additional standards apply; projects may instead use underlying zoning.

S — Study District

  • Purpose: Interim holding zone pending study; ultimate uses determined after necessary studies.

MUMF — Mixed Use Medical Facility District

  • Purpose: Mixed-use medical campus zoning. A final development plan and use permit are required for all uses, processed similar to a PD.

P — Exclusive Parking District

  • Purpose: Parcels dedicated to parking as principal use. See land use table and standards table for specifics. Numeric standards not found in retrieved materials. Verify with the jurisdiction.

Selected base-district dimensional standards

These citywide metrics are applied per Table 9-5.601; front yards in residential districts vary by street classification (arterial/collector/local), and garages must be set back at least 20 ft from the property line they face. Always consult the zoning map and the full table for parcel-specific footnotes.

District Max Height Min Lot Area Max Lot Coverage Typical Setbacks (side/rear) Notes Code Reference
R-4 35 ft 6,000 sf 40% 5 ft / 20 ft Front varies by street class; garage face min 20 ft § 9-5.601; footnotes a,k,f
R-6 35 ft 6,000 sf 40% 5 ft / 20 ft Same as R-4 § 9-5.601
R-10 45 ft 6,000 sf 40% 5 ft / 10 ft MF front setbacks less than SF § 9-5.601; footnote a
R-25 45 ft 20,000 sf 50% 5 ft / 10 ft (20 ft at low-density adjacency) New SF prohibited (except replacement) § 9-5.601; Table notes; § 9-5.3803 n.1
R-35 45 ft 20,000 sf 50% 5 ft / 10 ft (20 ft at low-density adjacency) New SF prohibited (except replacement) § 9-5.601; Table notes; § 9-5.3803 n.1
PBC 35 ft 20,000 sf 35% 0 ft / 0 ft Planned commercial centers § 9-5.601

Related universal standards to watch:

  • Accessory buildings in residential districts: 15 ft max height; must be behind front yard; typical side/rear setbacks apply, with certain small portable sheds exempt.
  • “Legally established” side/rear setbacks may be continued for expansions (not in fronts).

Downtown-specific layer

Antioch’s adopted Downtown Specific Plan adds district and frontage rules within Downtown/Rivertown; some downtown districts (e.g., RTC) include build-to lines and special density allowances that supersede standard yards. Check your site against the Specific Plan if downtown.

Use permissions highlights

  • Residential districts: ADUs are allowed by administrative approval across residential zones; child day-care centers require a use permit.
  • Higher-density zones (R-20, R-25, R-35): New single-family homes are prohibited except for replacing an existing home.
  • ES Overlay: Emergency shelters are permitted by right if § 9-5.3835 standards are met.
  • Cannabis: Only in mapped CB Overlays and only with a City Council use permit under § 9-5.3845.

For anything not listed here, consult the full Table of Land Use Regulations and then confirm parking ratios and landscaping and screening as applicable.

Procedures and approvals that interact with zoning

  • Review authority: The Planning Commission issues use permits and variances and may delegate items to the Zoning Administrator; it also performs design review.
  • Residential objective design standards: Single-family/Missing Middle and Multi-Family Objective Design Standards apply and are used in ministerial and discretionary review; the Zoning Ordinance controls if conflicts arise.
  • Density bonus: Projects meeting state affordability thresholds receive density bonuses, incentives, and standard waivers consistent with Gov. Code § 65915.
  • Downtown Specific Plan: Adopted as part of Antioch’s regulatory framework; check if your parcel is within its boundaries.

Information Gaps

  • Exact numeric height/lot/setback standards for some non-residential districts (C-0, C-1, C-2, C-3, M-1, M-2, OS, P, MCR, WF) were not present in the retrieved excerpts. Not found in retrieved materials. Verify with the jurisdiction.
  • Parcel-level zoning map layers and the Downtown district sub-zones (e.g., RTC boundaries) are not included in the retrieved files. Verify with the jurisdiction.

Checklist

  • Confirm your parcel’s mapped district(s) on the official Zoning Map and whether any overlays apply.
  • Identify use permissions in § 9-5.3803 and any notes (e.g., new single-family prohibitions in R-20/R-25/R-35; ES by-right rules; CB overlay limits).
  • Pull dimensional standards from Table 9-5.601 (height, coverage, yards, min lot size), including street-class-based front setbacks and garage setback rule.
  • If Downtown, cross-check the Downtown Specific Plan standards.
  • If residential, confirm applicable objective design standards and whether review is ministerial or requires design review.
  • Check parking and landscaping and screening requirements tied to your use/district.
  • If proposing affordable housing, evaluate variances and exceptions and the city’s density bonus procedure consistent with Gov. Code § 65915.
  • For existing sites with constrained yards, see “legally established setback” continuation rules.
  • If nonconforming or changing a non-residential site, review nonconforming uses and signage pages.

Risks & Ambiguities

Issue Why it matters What to verify
Street-class-based front setbacks Front yard minimums differ on arterial/collector/local streets; wrong assumption can push a building out of compliance. Confirm the street classification and apply Table 9-5.601 footnotes (and 20 ft garage face rule).
Split-zoned parcels Boundary splits change allowed uses/densities across a single lot. Use § 9-5.3701 boundary rules; small lots <12,000 sf may default to the preponderant or the more restrictive district.
R-20/R-25/R-35 and single-family New single-family is prohibited except replacement; a common pitfall in infill. See Table 9-5.3803, Note 1.
Overlay vs. base zoning Overlays (ES, CB, H, CIH, IH) can add or change permissions and standards. Check overlays mapped on your site and apply the overlay article first where it modifies rights.
Downtown-specific rules Downtown build-to and density provisions can supersede standard setbacks. Confirm if your property is in the Downtown Specific Plan area.
PD/HPD custom standards Planned Development districts set bespoke setbacks/heights; citywide tables may not apply. Read the approved final development plan/resolution for your PD.
Cannabis siting Cannabis uses only in CB overlays, with Council-issued use permits and operating agreements. Confirm overlay (CB 1/2/3) and permit conditions.

Plain-English Summary

Antioch assigns every parcel to a zoning district that sets what you can build and how big it can be. Find your district on the city zoning map, then check the allowed uses and the height/yard rules in the tables—front yard setbacks change with the street type, and higher-density residential zones don’t allow new single-family homes. Overlays like Downtown, Cannabis, Emergency Shelter, and Innovative Housing can add or change what’s allowed, and most residential projects must meet the city’s objective design standards and go through design review if required.

Source References

  • Title, components and purpose of zoning code: § 9-5.101–103 (Title 9, Chapter 5)
  • Zoning Map: § 9-5.3601 Zoning Map; consistency with General Plan
  • Determination of boundaries: § 9-5.3701
  • Summary of districts: § 9-5.3801
  • Table of Land Use Regulations, notes: § 9-5.3803 (incl. notes for ES, R‑20/25/35 single-family prohibition, ADU permissions)
  • Height/Area/Setback standards: Table 9-5.601 (incl. front yard footnotes and garage setback)
  • Residential accessory buildings: § 9-5.603
  • Planning Commission duties/design review authority: § 9-5.2508; Article 26 references
  • Objective design standards and design review procedures: § 9-5.701–702; § 9-5.2610–2611
  • Downtown Specific Plan adoption: § 9-5.3309
  • Density bonus program procedures: § 9-5.3501 et seq. (Gov. Code § 65915 consistency)
  • Cannabis Business overlays and permits: § 9-5.3845; overlay summary in § 9-5.3801
  • Innovative Housing (IH) Overlay and cottage communities: § 9-5.3850 (as excerpted)

Sources

Retrieved passages

  • Antioch Zoning Code (Title 9) High relevance
  • Antioch Zoning Code (§ 65583) High relevance
  • Antioch Zoning Code (§ 9-5.2607) High relevance
  • Antioch Zoning Code (§ 9-5.3102) High relevance
  • Antioch Zoning Code (§ 9-5.2904) High relevance
  • Antioch Zoning Code (§ 9-5.1701) High relevance
  • Antioch Zoning Code (§ 2-1.104) High relevance
  • Antioch Zoning Code (ARTICLE 37) High relevance

Cited sections

Frequently asked questions

What can I build on an R-4 lot in Antioch?

R-4 is a low-density single-family district. Single-family homes are allowed, and an ADU is allowed by administrative approval. Typical standards include a 35 ft height limit, 6,000 sf minimum lot size, and 5 ft side/20 ft rear yards; front yards vary by street type and garages must be 20 ft back from the property line. See § 9-5.3803 and Table 9-5.601.

Are new single-family homes allowed in R-25 or R-35?

No. In R‑20, R‑25, and R‑35, new single-family dwellings (other than replacing an existing one) are prohibited. These zones focus on multi-family housing types. See Table 9-5.3803, Note 1.

How do I find the zoning for my Antioch property?

Zoning is shown on the official “Zoning Map for the City of Antioch, California,” which is part of the code by reference and must stay consistent with the General Plan. Start with the city’s map and confirm the district and any overlays. See § 9-5.3601.

Do Downtown properties follow different setback and design rules?

Often yes. The Downtown Specific Plan adds build-to, frontage, and density rules for Downtown/Rivertown that can override standard yard rules. Check § 9-5.3309 and any referenced downtown standards.

What are front setback rules for homes on different street types?

Front setbacks vary by street class: typical residential fronts are about 20 ft on local streets, 25 ft on collectors, and 30 ft on arterials; garage faces must be at least 20 ft from the property line they face. See Table 9-5.601 and footnotes.

Where can cannabis businesses locate in Antioch?

Only within mapped Cannabis Business (CB) Overlay Districts, and only with a City Council–issued use permit under § 9-5.3845. CB sub-areas differ: CB 1 allows the broadest range, while CB 2 (Downtown) and CB 3 (Somersville) allow storefront retail only.

What is the Innovative Housing (IH) Overlay?

It’s an overlay enabling “cottage communities,” often on religious-institution sites with affordability commitments. Inside the IH Overlay, qualifying projects are reviewed ministerially; standards include up to 15 du/acre and unit sizes between 150–1,200 sf. See § 9-5.3850 excerpt.

Who approves use permits and variances?

The Planning Commission issues use permits and variances and may delegate some approvals to the Zoning Administrator; it also serves as the design review body. See § 9-5.2508.

Can an older side or rear setback be continued if I expand?

If a side or rear setback was legally established at less than today’s standard, you may continue it for expansions, provided other limits like lot coverage are met. This does not apply to front setbacks. See § 9-5.602.

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