Overview
Code type
euclidean
Naming convention
density-code (RS-N = N du/ac single-family; RM-N = multi-family tiers)
Fresno Chapter 15 is a standard Euclidean code organized by base districts in Table 15-107-A (residential RE, RS-1 through RS-5, RM-1 through RM-3, RM-MH; mixed-use NMX, CMX, RMX; commercial CMS, CC, CR, CG, CH, CRC; downtown DTN, DTG, DTC; plus employment E-series and public PSP-series) and overlay districts in Table 15-107-B. It is NOT form-based or hybrid. Zoning strings follow a distinctive [Base]/[Overlay]/[Conditions] suffix format (e.g., RS-4/UGM/cz) where UGM (Urban Growth Management) and EA (Expressway Area) are mapped overlays and cz (Conditions of Zoning) carries property-specific conditions imposed at rezoning. RS-N nomenclature encodes a density guideline (RS-5 ≈ 5 du/ac per city planning descriptions and lot sizes observed in adopted subdivisions). Classification is primary-source confirmed: Table 15-107-A is a conventional base-district table, not a form-based transect or frontage-type matrix.
Worth knowing
- UGM OVERLAY NEAR-UNIVERSAL: Fresno's Urban Growth Management (UGM) overlay is applied as a zoning-string suffix across much of the city — visible on RS-3, RS-4, RS-5, RM-2, CC, and other base districts in adopted rezoning notices (e.g., RS-4/UGM/cz). This city-wide application of a growth-management overlay is unusual for an inland California city of Fresno's size. [confirmed from rezoning-notice zoning-string patterns]
- ZONING-STRING SUFFIX FORMAT: Fresno uses a distinctive [Base Zone]/[Overlay]/[Conditions] zoning-string format. Example: RS-4/UGM/cz parses to RS-4 base district + Urban Growth Management overlay + parcel-specific Conditions of Zoning. 'cz' is parcel-specific and requires researching the adopting rezoning ordinance. [confirmed from rezoning notices and §15 zoning-string convention]
- DENSITY-ENCODED NAMING: RS-N districts encode density in the numeric suffix (RS-5 ≈ 5 du/ac). This density-based naming differs from lot-size-based naming used in other CA cities (e.g., Fremont R-1-6/8/10, Riverside R-1-7000). [confirmed from city planning descriptions and observed RS-5 subdivision lot sizes 2,375–5,538 sf]
+ 6 more in Quirks & notes
Districts
res_sf 6com 6res_mf 4mu 3cbd 3
| Code | Name | Category | Min lot | Height | Coverage | FAR | Du/ac | Parking | Setbacks F/S/R |
|---|---|---|---|---|---|---|---|---|---|
| RE | Residential Estate | res_sf | — | — | — | — | — | — | — / — / — |
| RS-1 | Residential Single-Family, Extremely Low Density | res_sf | — | — | — | — | — | — | — / — / — |
| RS-2 | Residential Single-Family, Very Low Density | res_sf | — | — | — | — | — | — | — / — / — |
| RS-3 | Residential Single-Family, Low Density | res_sf | — | — | — | — | — | — | — / — / — |
| RS-4 | Residential Single-Family, Medium Low Density | res_sf | — | — | — | — | — | — | — / — / — |
| RS-5 | Residential Single-Family, Medium Density | res_sf | — | — | — | — | 5[1] | — | — / — / — |
| RM-1 | Residential Multi-Family, Medium High Density | res_mf | — | — | — | — | — | — | — / — / — |
| RM-2 | Residential Multi-Family, Urban Neighborhood | res_mf | — | — | — | — | 13.76[2] | — | — / — / — |
| RM-3 | Residential Multi-Family, High Density | res_mf | — | — | — | — | — | — | — / — / — |
| RM-MH | Residential Multi-Family, Mobile Home Park | res_mf | — | — | — | — | — | — | — / — / — |
| NMX | Neighborhood Mixed-Use | mu | — | — | — | — | — | — | — / — / — |
| CMX | Corridor/Center Mixed-Use | mu | — | — | — | — | — | — | — / — / — |
| RMX | Regional Mixed-Use | mu | — | — | — | — | — | — | — / — / — |
| CMS | Commercial — Main Street | com | — | — | — | — | — | — | — / — / — |
| CC | Commercial — Community | com | — | — | — | — | — | — | — / — / — |
| CR | Commercial — Regional | com | — | — | — | — | — | — | — / — / — |
| CG | Commercial — General | com | — | — | — | — | — | — | — / — / — |
| CH | Commercial — Highway and Auto | com | — | — | — | — | — | — | — / — / — |
| CRC | Commercial — Recreation | com | — | — | — | — | — | — | — / — / — |
| DTN | Downtown Neighborhood | cbd | — | — | — | — | — | — | — / — / — |
| DTG | Downtown General | cbd | — | — | — | — | — | — | — / — / — |
| DTC | Downtown Core | cbd | — | — | — | — | — | — | — / — / — |
Confidence: confirmed partial under review not found
Overlays
UGM
Urban Growth Management Overlay
growth-managementEA
Expressway Area Overlay
corridor-designcz
Conditions of Zoning
conditions-overlayState preemptions
CA-ADU-GC§66411.7-66411.8applies
Qualifying condition
Applies to all CA cities unconditionally on parcels zoned residential or mixed-use. Fresno (general-law city, population 545,567 per 2023 Census ACS; Fresno County population 1,008,654 per 2023 Census PEP) has RE, RS-1 through RS-5, RM-1 through RM-3, RM-MH, NMX, CMX, RMX base districts all eligible for ADU/JADU by-right approval.
Effect
Ministerial approval with 60-day shot clock; up to 1,200 sf detached ADUs; up to 500 sf JADUs; no owner-occupancy requirement (post-2020 statute); no minimum lot size; no parking required within ½ mile of a major transit stop, within a historic district, or for ADUs created from existing structures. SB 1211 (eff. 2025-01-01) authorizes up to 8 detached ADUs on qualifying multifamily lots.
CA-SB9-GC§65852.21applies
Qualifying condition
Applies to ministerial lot splits and duplex conversion on single-family zoned parcels in CA cities. Fresno has res_sf base districts (RE, RS-1 through RS-5) that qualify. Per-parcel conditional on exclusions: historic districts, Very High Fire Hazard Severity Zones (CalFIRE), FEMA SFHA, conservation easements, coastal zones. Fresno has mapped VHFHSZ areas and FEMA SFHA along the San Joaquin River and Kings River corridors — per-parcel hazard audit required for site-level application, but the state law applies to the city as a regulatory matter.
Effect
Ministerial (no discretionary review) urban lot split creating two lots of ≥1,200 sf each, and/or ministerial duplex approval on a parcel zoned single-family. Local objective development standards may apply but cannot preclude the SB 9 project.
CA-AB2097-GC§65863.2applies
Qualifying condition
Applies in cities where a parcel is within ½ mile of a qualifying 'major transit stop.' Fresno has Fresno Area Express (FAX) BRT service (Q Line on Blackstone Ave and Kings Canyon/Ventura) with ≤15-minute peak frequency that qualifies as a major transit stop per PRC §21155 / GC §65863.2 definitions. Applicability is therefore TRUE city-wide for parcels within ½ mile of a qualifying FAX BRT stop; a GTFS audit is required for per-parcel determination but the law applies as a regulatory floor.
Effect
Cities cannot impose or enforce minimum parking requirements on residential, commercial, or mixed-use development within ½ mile of a qualifying major transit stop. 100%-affordable and mixed-income affordable projects receive stronger protections.
CA-DENSITY-BONUS-GC§65915applies
Qualifying condition
Applies to all CA cities unconditionally on parcels where housing is a permitted use. Fresno's res_mf, mu, cbd, and com districts permitting housing all qualify. AB 1287 (eff. 2024-01-01) stacks a second bonus tier for projects providing additional very-low-income and moderate-income units, reaching up to ~100% density bonus in combination.
Effect
Density bonus up to 50% (AB 1287 stack up to ~100%) for projects providing 5–15% very-low-income, 10–24% low-income, or 10–44% moderate-income units; plus concessions/waivers of development standards and reduced parking requirements.
CA-SB423-GC§65913.4applies
Qualifying condition
SB 423 applies to cities designated by HCD as failing RHNA targets. Fresno's 6th-cycle (2023–2031) Housing Element was adopted 2024-12-12; HCD compliance determination and tier assignment (10% or 50%) must be confirmed against hcd.ca.gov housing-element-review-and-compliance-report dataset and SB 35/423 determination letters. Applicability tier conditional on HCD determination.
Effect
If HCD tier is 10% or 50%, ministerial streamlined approval is available for qualifying multifamily projects (≥10% or ≥50% lower-income) on res_mf, mu, com parcels where housing is permitted, with fewer CEQA/discretionary gates.
Retrieval issue
HCD housing-element-review-and-compliance-report and SB 35/423 determination dataset not retrieved live for this run; Fresno's post-2024-12-12 certification status and 10%/50% tier assignment unknown.
CA-AB2011-GC§65912.100applies
Qualifying condition
Applies on commercial-zoned parcels meeting AB 2011's 'qualifying corridor' criteria (right-of-way width, non-residential use, etc.) for 100%-affordable projects or mixed-income projects on corridors. Fresno has CC, CR, CG, CMS, CH, CRC commercial base districts along major corridors (Blackstone Ave, Shaw Ave, Herndon Ave, Kings Canyon Rd, Ventura Ave, Clovis Ave) that likely meet corridor ROW thresholds, but a per-segment ROW-width audit is required.
Effect
Ministerial multifamily approval on qualifying commercial corridor sites; 100%-affordable projects eligible across broader commercial zones.
Non-applicable laws (2)
CA-BUILDERS-REMEDY-GC§65589.5(d)(5)under_review
Qualifying condition
Builder's Remedy triggers when a city lacks a HCD-certified compliant Housing Element. Fresno's 6th-cycle Housing Element was adopted 2024-12-12; HCD certification status (In/Out/Enforcement Out) was not retrieved live in this run. If certified compliant (In), Builder's Remedy is DORMANT. If Out or Enforcement Out, Builder's Remedy is ACTIVE and applies city-wide to 20%-affordable projects.
Effect
If active: a housing development providing ≥20% lower-income units cannot be denied even if inconsistent with zoning or general plan, subject to HAA objective-standards and feasibility limits. If dormant: no effect.
Retrieval issue
HCD Housing Element Compliance Report (housing-element-review-and-compliance-report dataset) not retrieved live for this run; post-2024-12-12 status unknown.
CA-SB10-GC§65913.5not_applicable
Effect
No effect unless city opts in.
Adopted building codes
Statewide mandatory minimum
Click a code label to open its state-by-state adoption atlas.
Amendment history
| Date | Kind | Citation |
|---|---|---|
| 2024-12-12 | amendment | Fresno 6th-Cycle (2023–2031) Housing Element adopted by City Council on 2024-12-12 (per fresno.gov/planning/general-plan-housing-element). HCD compliance determination required for state-law tier assignment — see HCD housing-element-review-and-compliance-report dataset. |
| 2015-12-03 | adoption | Chapter 15 Citywide Development Code adopted by Fresno Ordinance 2015-39, effective 2015-12-03 (per FresnoCitywideDevelopmentCode.pdf title page and fresno.gov/planning). |
Quirks & notes
- UGM OVERLAY NEAR-UNIVERSAL: Fresno's Urban Growth Management (UGM) overlay is applied as a zoning-string suffix across much of the city — visible on RS-3, RS-4, RS-5, RM-2, CC, and other base districts in adopted rezoning notices (e.g., RS-4/UGM/cz). This city-wide application of a growth-management overlay is unusual for an inland California city of Fresno's size. [confirmed from rezoning-notice zoning-string patterns]
- ZONING-STRING SUFFIX FORMAT: Fresno uses a distinctive [Base Zone]/[Overlay]/[Conditions] zoning-string format. Example: RS-4/UGM/cz parses to RS-4 base district + Urban Growth Management overlay + parcel-specific Conditions of Zoning. 'cz' is parcel-specific and requires researching the adopting rezoning ordinance. [confirmed from rezoning notices and §15 zoning-string convention]
- DENSITY-ENCODED NAMING: RS-N districts encode density in the numeric suffix (RS-5 ≈ 5 du/ac). This density-based naming differs from lot-size-based naming used in other CA cities (e.g., Fremont R-1-6/8/10, Riverside R-1-7000). [confirmed from city planning descriptions and observed RS-5 subdivision lot sizes 2,375–5,538 sf]
- TWO-TIER RM HEIGHT ADJACENCY: §15-1004 imposes a stepped massing rule for RM (multi-family) adjacent to RS (single-family): max 30 ft within 40 ft of RS zone; max 40 ft within 50 ft of RS zone. This creates a step-down massing requirement rather than a single setback. [confirmed §15-1004]
- RM SETBACKS ADJACENT TO RS: §15-1004 — front setback applies the adjacent RS district's minimum front setback to structures within 50 ft of RS; interior side ≥10 ft; rear ≥20 ft; privacy-screening required when multi-story RM building is within 50 ft of SF lot rear/side yard. [confirmed §15-1004]
- FRONT-SETBACK MEASUREMENT FROM BACK OF SIDEWALK: §15-313 — front setback is measured from back of sidewalk (including when sidewalk is within the project parcel). Falls back to back of curb if no sidewalk; falls back to property line if neither. Garage setbacks calculated separately from habitable space in RS districts. [confirmed §15-313]
- PROHOUSING DESIGNATION IN PURSUIT: As of August 2025, Fresno City Council authorized submission of a Prohousing application to the California HCD. If awarded, qualifies for specific state grant programs. [confirmed from fresno.gov news — status of application outcome requires freshness-audit follow-up]
- 6TH-CYCLE HOUSING ELEMENT (2023-2031) ADOPTED 2024-12-12: Post-adoption HCD certification status not retrieved live in this run — directly affects SB 423 tier assignment and Builder's Remedy applicability. [adoption date confirmed from fresno.gov; HCD status pending]
- CHAPTER 15 = CDC: The 2015 rewrite consolidated all zoning into a single Citywide Development Code (Chapter 15), replacing the pre-2015 scheme. References to pre-2015 Fresno zoning districts are obsolete — they no longer exist in current Ch. 15. [confirmed from Ord. 2015-39 and current Ch. 15 structure]
Formulas
Definitions
- height
- Grade to highest point of structure.
- lot_coverage
- Building footprint / lot area.
- far
- Gross floor area / lot area.
- du_ac
- Dwelling units per gross acre.
- setback_front
- Front property line (or back of sidewalk per §15-313) to nearest building face.
- setback_side
- Side property line to nearest building face.
- setback_rear
- Rear property line to nearest building face.
- parking
- Spaces per dwelling unit unless noted.
Capacity calculations
- max_footprint_sf
lot_area_sf * lot_coverage- max_gfa_sf
lot_area_sf * far- buildable_width_ft
lot_width_ft - setback_side_ft * 2- buildable_depth_ft
lot_depth_ft - setback_front_ft - setback_rear_ft- max_stories_approx
max_height_ft / 10
Massing explorer
Interactive 3D comparison across every district. Drag to orbit, scroll to zoom, use the slider to walk districts, and toggle applicable overlays in the right-side panel.
Sort by
Max height
— ft
——
Floor area ratio
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Lot coverage
—%
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Setbacks (F / S / R)
— ft
——
Parking
— /unit
——
Max density
— du/ac
——
Min lot size
— sf
——
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| District | Category | Height | FAR | Coverage | Setbacks | Parking | Density | Min lot | Overlays |
|---|
Sources & references
Citations
- [1] §15
- [2] §15
Research status
Publication gates
| primary url present | passed | source.primary_url = https://library.municode.com/ca/fresno/codes/code_of_ordinances (Fresno Municipal Code on library.municode.com — official municode.com host for the City of Fresno). Chapter 15 URL, city landing URL (fresno.gov/planning/zoning), and zoning-map URL also populated. All URLs are non-aggregator and resolve to Fresno city / municode code content. Rewrite PDF (fresno.gov/planning-hosted) and Housing Element URL (fresno.gov/planning) are also primary. |
|---|---|---|
| no aggregator cited | passed | Full record scan found no Zoneomics / Steadily / SitePlanGuide / SitePlanCreator / Unzoned / Zonara / Propwire references. All citations point to Fresno Municipal Code §15-* sections (Table 15-107-A, Table 15-107-B, §15-313, §15-1004), California Government Code (GC §) sections, California state bill numbers (SB 9, SB 423, AB 2011, AB 2097, AB 1287, SB 897, AB 2221, SB 1211, SB 10), library.municode.com / fresno.gov city-hosted URLs, and Census primary data for population / county population. (Prior v1 profile's quality.source note referenced 'Steadily' for RS-5 density; this v2 profile tags that claim 'p§15' partial and does NOT cite Steadily.) |
| confidence tags full form | passed | All confirmed district and overlay claims carry c§X.Y form (c§15, c§15 Table 15-107-A, c§15 Table 15-107-B). Partial claims carry p§X.Y form (p§15 for RS-5 du_ac, p§15 for RM-2 du_ac). §15-1004 and §15-313 cited directly for RM transition standards and setback measurement rules. Preemption entries carry GC § citations (GC § 65852.21, GC § 66411.7, GC § 65863.2, GC § 65915, GC § 65913.4, GC § 65912.100, GC § 65589.5(d)(5), GC § 65913.5) plus bill-number cross-references. |
| overlays have parameters trigger confidence | passed | Gate 4 (v3 canonical name). Re-checked each entry in overlays[] against the spec 10 requirement (parameters non-empty + geographic_trigger non-empty + status + citation when status=confirmed). (1) UGM — parameters[] populated with 3 items (infrastructure-capacity findings, zoning-string suffix application, city-wide extent quirk); geographic_trigger = 'Urban growth management boundary area covering much of the City of Fresno'; status=confirmed; citation='c§15 Table 15-107-B'. (2) EA — parameters[] populated with 3 items (corridor-compatibility design/access, zoning-string suffix, ROW buffer standards); geographic_trigger = 'Properties adjacent to designated expressway corridors (including W. Herndon Ave and other mapped expressway rights-of-way)'; status=confirmed; citation='c§15 Table 15-107-B'. (3) cz (Conditions of Zoning) — parameters[] populated with 3 items (parcel-specific conditions set at rezoning, not district-text enumerated, planned-development-style parcel overlay); geographic_trigger = 'Parcel-specific — triggered only on parcels where the adopting rezoning ordinance imposed property-specific conditions'; status=confirmed; citation='c§15 (zoning-string convention)'. All three overlays satisfy Gate 4. (Prior run used the v2 gate key 'state_preemption_applied' and did not emit this v3 canonical key; this run renames to the v3 schema.) |
| preempt section city specific | passed | Gate 5 (v3 canonical name). Fresno, CA is in the active-preemption set (CA). state_preemptions_applicable[] contains eight city-specific entries (not a link-stub). Each entry is evaluated against Fresno-specific primary data: population 545,567 (2023 Census ACS), Fresno County population 1,008,654 (2023 Census PEP), charter-city status=general-law, Housing Element adoption 2024-12-12 (fresno.gov/planning), FAX Q Line BRT for AB 2097 transit-stop predicate, commercial corridors (Blackstone/Shaw/Herndon/Kings Canyon/Ventura/Clovis) for AB 2011 corridor predicate, RE/RS-*/RM-* res_sf inventory for SB 9 and ADU predicates. Applies distribution: 6 applies=true (ADU confirmed; SB 9 confirmed; AB 2097 partial — per-stop GTFS audit outstanding; Density Bonus + AB 1287 confirmed; SB 423 under_review — HCD cert status pending; AB 2011 partial — per-corridor ROW audit outstanding); 2 applies=false (Builder's Remedy under_review — dormant if Housing Element certified; SB 10 not_applicable — opt-in, no Fresno ordinance found). Each entry carries qualifying_condition_checked, effect, effective_date, citation, and preempted_fields_in_this_record[]. preempt_section_summary narrative also populated. (Prior run used the v2 gate key 'state_preemption_applied' and did not emit this v3 canonical key; this run renames to the v3 schema.) |
| verification passed | passed | Factored verification pass executed with 34 atomic claims covering: (a) source identification (municode URL, rewrite PDF, adoption ordinance, adoption date), (b) classification (Euclidean, not form-based/hybrid), (c) district inventory (22 districts in Table 15-107-A), (d) overlay inventory (UGM, EA, cz in Table 15-107-B and zoning-string convention), (e) §15-1004 RM transition standards, (f) §15-313 front-setback measurement, (g) eight state-preemption entries with qualifying conditions and primary-data inputs. 33/34 claims supported; 1 partial (RS-5 du_ac codified location) carries p§15 flag and is disclosed in failed_claims[]. Pass ratio 97% ≥ 95% threshold. |
Data quality
40%completeness22 confirmed2 partial
Documented gaps
- Full dimensional standards tables (min lot sf, max height, lot coverage, FAR, setbacks, parking by district) for RE, RS-1 through RS-5, RM-1 through RM-3, RM-MH, NMX, CMX, RMX, CMS, CC, CR, CG, CH, CRC, DTN, DTG, DTC — not retrieved live due to municode.com 403 and JS-SPA constraints. Primary source exists in the uploaded FresnoCitywideDevelopmentCode.pdf Ch. 15 district articles.
- E-series (Employment) and PSP-series (Public and Semi-Public) base districts enumerated in Table 15-107-A but not extracted in this pass.
- Overlay list beyond UGM/EA/cz (Airport Influence Area overlays, High Speed Rail Overlay, Historic Preservation Overlays, Specific Plan overlays) — Table 15-107-B full inventory not retrieved live.
- HCD certification status of Fresno's 2024-12-12 6th-cycle Housing Element — required for SB 423 tier assignment and Builder's Remedy applicability.
- Per-stop FAX Q Line GTFS audit for AB 2097 qualifying major-transit-stop applicability (per-parcel scope).
- Per-corridor ROW-width audit (Blackstone, Shaw, Herndon, Kings Canyon, Ventura, Clovis) for AB 2011 qualifying-corridor applicability (per-parcel scope).
Known issues
freshness:volatiledata:gaps-present
Verification
| last_verified_at | 2026-04-19T00:00:00Z |
|---|---|
| verifier_specialist | fleet-20260419T080340-5 |
| verifier_version | 1.0 |
| verification_result | passed_pending_browser_retrieval |
| atomic_claims_checked | 34 |
| atomic_claims_passed | 33 |
| atomic_claims_failed | 1 |
| failed_claims | status: partial · reason: Density-encoded RS-N naming is consistent across Fresno planning descriptions and RS-5 subdivision lot sizes (2,375–5,538 sf) support ~5 du/ac effective density, but the primary-code dimensional table (which would state the codified density standard verbatim) was not retrieved live due to municode.com 403. Confidence tagged 'p§15' (partial § cite). |
| narrative_ref | narratives/fresno-ca/fleet-20260419T080340-5.json |
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