Overview
Worth knowing
- 1987 Whittier Narrows earthquake (M5.9) damaged historic Uptown; Whittier Fault (Alquist-Priolo zoned) runs NW–SE through the northeast quadrant of the city. All habitable-structure projects within a delineated EFZ require site-specific geotechnical investigation. [confirmed — CGS Alquist-Priolo mapping]
- Earlham, College Hills, and Uptown historic districts active under the Historic Resources Commission; Mills Act contracts available for qualifying owner-occupied properties. Historic-district parcels are SB 9 excluded per GC §65852.21(a)(6)(D). [confirmed — HRC active]
- Overlay stacking is common in central Whittier: Historic Preservation + Whittier Boulevard Specific Plan + Downtown Mixed-Use + Greenleaf Corridor + potential TOD layer may all apply to a single Uptown parcel. Most restrictive rule applies unless a specific plan expressly supersedes. [confirmed]
+ 6 more in Quirks & notes
Districts
spec 4res_sf 3res_mf 3mu 3com 2ind 2off 1
| Code | Name | Category | Min lot | Height | Coverage | FAR | Du/ac | Parking | Setbacks F/S/R |
|---|---|---|---|---|---|---|---|---|---|
| R-1 | Single Family Residential | res_sf | 7,000 sf[4] | 35 ft[5] | 0.4[6] | — | 6.2[7] | 1[8] | 20[1] / 5[2] / 5[3] |
| R-2 | Low Density Multi-Family | res_mf | —[12] | 45 ft[13] | — | — | 13[14] | 1.87[15] | —[9] / —[10] / —[11] |
| R-3 | Medium Density Multi-Family | res_mf | —[16] | 60 ft[17] | — | — | 20[18] | 1.62[19] | — / — / — |
| R-4 | High Density Multi-Family | res_mf | — | 75 ft[20] | — | — | 30[21] | —[22] | — / — / — |
| R-E | Residential Estate | res_sf | 20,000 sf[23] | 35 ft[24] | — | — | — | — | — / — / — |
| H-R | Hillside Residential | res_sf | 20,000 sf[25] | 35 ft[26] | — | — | — | — | — / — / — |
| C-1 | Neighborhood Commercial | com | — | 50 ft[27] | — | — | — | —[28] | — / — / — |
| C-2 | General Commercial | com | — | 70 ft[29] | — | — | — | —[30] | — / — / — |
| C-O | Commercial Office | off | — | 70 ft[31] | — | — | — | —[32] | — / — / — |
| C-3 | Heavy Commercial / Commercial-Manufacturing | ind | — | 55 ft[33] | — | — | — | — | — / — / — |
| M | Manufacturing | ind | — | 65 ft[34] | — | — | — | — | — / — / — |
| MU-1 | Mixed Use 1 | mu | — | — | — | — | — | — | — / — / — |
| MU-2 | Mixed Use 2 | mu | — | — | — | — | — | — | — / — / — |
| MU-3 | Mixed Use 3 | mu | — | — | — | — | — | — | — / — / — |
| PQP | Public / Quasi-Public | spec | — | — | — | — | — | — | — / — / — |
| O-S | Open Space | spec | — | — | — | — | — | — | — / — / — |
| PUT | Public Utility / Transportation | spec | — | — | — | — | — | — | — / — / — |
| GC | Golf Course | spec | — | — | — | — | — | — | — / — / — |
Confidence: confirmed partial under review not found
Overlays
FP
Floodplain (FEMA SFHA)
FPParcels mapped within FEMA Special Flood Hazard Area (Zones AE, A, and shaded X). Primary coverage is the southern / southeastern edge of the city along the San Gabriel River and Whittier Narrows flood control corridor, with additional isolated SFHA pockets per current FIRM panels.
| base_flood_elevation_compliance | required |
|---|---|
| lowest_floor_elevation_above_bfe_ft | 1[35] |
| substantial_improvement_threshold_pct | 50[36] |
| floodway_encroachment | prohibited absent no-rise certification |
AP-EQ
Alquist-Priolo Earthquake Fault Zone (Whittier Fault)
ENVThe Whittier Fault trace crosses the city on a NW–SE axis through the northeastern quadrant (Puente Hills); the Puente Hills Thrust system additionally underlies the broader area. CGS has delineated Earthquake Fault Zones along the mapped fault trace; parcels intersecting a delineated zone trigger Alquist-Priolo review.
| fault_trace_setback_ft | 50 |
|---|---|
| geotechnical_report_required | 1 |
| habitable_structures_on_fault_trace | prohibited |
HP
Historic Preservation Overlay
HPDesignated historic resources and districts, including the Earlham Historic District (early-20th-century Craftsman / Spanish Colonial Revival residential), the College Hills area near Whittier College, and Uptown / downtown Whittier landmark structures. Mills Act contracts available to qualifying owner-occupied historic properties.
| design_review_required | 1 |
|---|---|
| mills_act_eligibility | 1 |
| sb9_exclusion_flag | 1 |
WBSP
Whittier Boulevard Specific Plan
CORWhittier Boulevard commercial / mixed-use corridor — the primary east-west retail spine through the central portion of the city.
| form_controls | corridor-specific setbacks, build-to lines, and pedestrian-oriented frontage standards |
|---|---|
| mixed_use_allowed | 1 |
| ground_floor_active_use | required in designated segments |
| specific_plan_supersedes_base | 1[37] |
DMU
Downtown Mixed-Use (Uptown)
DTUptown Whittier — the historic downtown core centered on Greenleaf Avenue / Philadelphia Street. Partially overlapping the Historic Preservation overlay; vertical mixed-use orientation.
| vertical_mixed_use_promoted | 1 |
|---|---|
| ground_floor_commercial_required | 1 |
| reduced_parking | 1 |
| streamlined_approvals | 1 |
GLC
Greenleaf Avenue Corridor
CORGreenleaf Avenue commercial / pedestrian corridor through Uptown — the primary north-south retail street of the downtown district.
| pedestrian_oriented_frontage | 1 |
|---|---|
| infill_multifamily_priority_site | 1 |
TOD
Transit-Oriented Development Corridor
TODTransit-oriented corridors along Whittier Boulevard and parallel bus-served arterials. Whittier is served by Metro and Foothill Transit bus service rather than heavy rail; qualifying major transit stops under AB 2097 / PRC §21064.3 depend on peak-hour headway at specific intersections rather than a fixed station.
| reduced_parking | 1 |
|---|---|
| increased_density_allowed | 1 |
| mixed_use_permitted | 1 |
ES
Emergency Shelter Overlay (SB 2 / SB 639)
specDesignated emergency-shelter-permitted zones required to be identified per SB 2 (2007) and strengthened by SB 639 (2018). City-wide overlay but typically layered on commercial (C-1, C-2) and industrial (M) zones.
| by_right_permitting_in_designated_zone | 1[38] |
|---|---|
| capacity_must_accommodate_unmet_need | 1 |
P
Parking Overlay District
specSpecific commercial / downtown areas where modified parking ratios, shared-parking arrangements, or off-site parking agreements apply.
| shared_parking_permitted | 1 |
|---|---|
| off_site_parking_permitted | 1 |
| modified_ratios | case-by-case per overlay designation |
State preemptions
CA-ADU-GC§66411.7-66411.8applies
Qualifying condition
Whittier has R-1/R-2/R-3/R-4/R-E/H-R residential zones. State ADU law applies by-right to any residential or mixed-use parcel. Cannot require minimum lot size, cannot require owner-occupancy through sunset, cannot require replacement parking near transit / in historic districts / within existing structure. | title=Accessory Dwelling Units / JADUs ; effect_on_city=Overrides any WMC §18.16 / §18.18 / §18.20 / §18.22 provision that would prohibit ADUs or JADUs on residential parcels. One ADU + one JADU per single-family lot; additional ADUs permitted on multifamily lots per statute. Historic-district overlay does NOT preempt ADU by-right but may impose objective design standards (size, materials) consistent with state law.
CA-SB9-GC§65852.21-66411.7applies
Qualifying condition
Whittier has SF-zoned parcels (R-1, R-E, H-R). SB 9 applies per-parcel conditional on: not in a designated historic district (EXCLUSION — Earlham, College Hills, Uptown landmark parcels are SB 9 excluded), not in a very-high fire hazard severity zone (most of Whittier is not VHFHSZ but Puente Hills eastern edge may flag — per-parcel check required), and FEMA SFHA exclusion (San Gabriel River / Whittier Narrows floodplain parcels per-parcel excluded), and not within a delineated Alquist-Priolo fault zone where the parcel includes the fault trace. | title=SB 9 — HOME Act (Lot Splits + Duplex Conversion) ; effect_on_city=Ministerial up-to-4 units on qualifying R-1 / R-E / H-R parcels via lot split + duplex on each resulting lot. City cannot require lot size >40% of original, setback >4 ft side/rear, or FAR <0.8 on resulting lots. Hillside and fault-zone parcels require per-parcel applicability analysis. ; per_parcel_conditional=True ; exclusions=['designated historic districts (Earlham, College Hills, Uptown landmark parcels)', 'FEMA SFHA parcels (San Gabriel River / Whittier Narrows corridor, per-parcel)', 'Alquist-Priolo Earthquake Fault Zone parcels intersecting Whittier Fault trace (per-parcel)', 'very high fire hazard severity zones (Puente Hills eastern edge, per-parcel)', 'coastal zone (N/A — Whittier is inland)']
CA-DensityBonus-GC§65915applies
Qualifying condition
Statewide. Applies to any Whittier project meeting affordability thresholds (5% VLI, 10% LI, 10% moderate for-sale, or 100% affordable). Eligible base districts include R-2, R-3, R-4, C-1, C-2 (mixed-use above ground floor per §18.30.020), C-O, and MU-1/MU-2/MU-3 parcels, plus Whittier Boulevard Specific Plan sites. | title=State Density Bonus Law ; effect_on_city=Up to 80% density bonus with 1–4 incentives / concessions depending on affordability tier. Reduced parking per §65915(p): 0.5 spaces/unit for studios and 1-BR, 1.0 for 2–3 BR, 1.5 for 4+ BR on affordable component. Cannot be denied if project meets qualifying thresholds; approval is ministerial for the density bonus itself.
CA-AB2097applies
Qualifying condition
Whittier is served by Metro and Foothill Transit bus service; there is no heavy-rail / light-rail station within city limits (Metro L Line Norwalk terminus is outside city boundary). AB 2097 'major transit stop' under PRC §21064.3 requires either a rail station or a bus intersection with documented 15-min peak-hour headway service. Qualifying-transit-stop designation for Whittier arterials (Whittier Blvd, Washington Blvd, Colima Rd) depends on Metro / Foothill Transit peak-hour headway at specific intersections — NOT confirmed live in this pass. | title=AB 2097 — Parking Mandate Elimination Near Transit ; effect_on_city=If a qualifying major transit stop is confirmed at a Whittier arterial intersection: no minimum parking may be required for residential, commercial, or mixed-use within ½ mile of that point. Otherwise AB 2097 does not apply city-wide and parcel-specific analysis is required. ; search_performed=Metro / Foothill Transit peak-hour headway data at Whittier arterial intersections not retrieved live. ; source_url=https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=65863.2.&lawCode=GOV ; source_type=statute_text ; source_accessed=2026-04-19
Retrieval issue
Transit operator headway tables are not directly exposed to WebFetch; qualifying-stop designation is a per-intersection analysis typically run against GTFS feeds.
CA-SB423-GC§65913.4applies
Qualifying condition
HCD SB 35/423 determination for Whittier (Full 5th cycle evaluated): Total RHNA 878, Lower-income completion 80.7%, Above-moderate completion 275.1%. Whittier is NOT exempt. Whittier is flagged at the 50% affordability tier (50pct_flag = Yes) — streamlining applies to projects with ≥50% of units affordable to low or very-low income households. HCD dataset accessed 2026-04-19. | title=SB 423 — Streamlined Ministerial Multifamily Approval (extends SB 35) ; effect_on_city=Ministerial by-right approval for qualifying multifamily on residential / mixed-use / commercial-zoned parcels with ≥50% affordable units. Projects with prevailing-wage + skilled-and-trained-workforce compliance cannot be denied on discretionary grounds. Applies to R-2, R-3, R-4, C-1, C-2, MU-1/2/3 sites within the city. ; tier=50% ; source_url=https://data.ca.gov/dataset/sb-35-data ; source_type=primary_dataset ; source_accessed=2026-04-19 ; evidence=50% tier — jurisdiction lower-income RHNA completion at 80.7% (below threshold); SB 35/423 streamlining triggered for projects ≥50% affordable ; hcd_data={'sb35_determination': {'jurisdiction': 'WHITTIER', 'county': 'LOS ANGELES', 'planning_period_evaluated': 'Full 5th', 'rhna_total': '878', 'total_permits': '1,338', 'lower_pct_complete': '80.7%', 'above_mod_pct_complete': '275.1%', 'exempt_flag': 'No', '10pct_flag': 'No', '50pct_flag': 'Yes', 'tier': '50%', 'most_recent_apr_status': 'Successful'}}
CA-AB2011-GC§65912.100applies
Qualifying condition
Whittier has commercial corridors that qualify as 'commercially-zoned parcels along corridors' under AB 2011 — specifically Whittier Boulevard, Washington Boulevard, and Colima Road. 100% affordable multifamily projects are ministerial on any commercial site (C-1, C-2, C-O, C-3); mixed-income multifamily is ministerial on corridor sites. | title=AB 2011 — Affordable Housing on Commercial Corridors ; effect_on_city=Ministerial approval for qualifying multifamily on C-1 / C-2 / C-3 corridor sites; 100% affordable bypasses standard discretionary review even off-corridor. Prevailing wage applies. Overlaps SB 423 — developer chooses pathway.
CA-SB2-SB639-ESapplies
Qualifying condition
All CA cities must identify a zone or zones where emergency shelters are permitted by-right with capacity to meet unsheltered need per Housing Element (GC §65583(a)(4)). Whittier has implemented this via WMC §18.06.459. | title=SB 2 / SB 639 — Emergency Shelter By-Right ; effect_on_city=Emergency shelters in the designated zone are approved ministerially; cannot require conditional use permit or discretionary review for qualifying shelter proposals.
Non-applicable laws (2)
CA-BuildersRemedy-GC§65589.5(d)(5)applies
Qualifying condition
HCD Housing Element Compliance record for Whittier (6th cycle / 6L): Adopted 2022-08-16, Reviewed 2022-10-12, review_status=In, compliance_status=In. Whittier's Housing Element is HCD-certified compliant — Builder's Remedy is DORMANT for this city. | title=Builder's Remedy ; effect_on_city=None at current certification status. If Whittier's Housing Element certification lapses in a future cycle, Builder's Remedy becomes available for projects with ≥20% LI affordable (or 100% moderate for-sale) to bypass base district height, density, FAR, and use restrictions subject only to health/safety findings. ; source_url=https://data.ca.gov/dataset/housing-element-compliance-report ; source_type=primary_dataset ; source_accessed=2026-04-19 ; evidence=Housing element certified compliant — not subject ; hcd_data={'housing_element': {'jurisdiction': 'WHITTIER', 'county': 'Los Angeles', 'planning_period': '6L', 'record_type': 'Adopted', 'review_status': 'In', 'reviewed_date': '2022-10-12 00:00:00.0000000', 'compliance_status': 'In', 'cycle': '6th Cycle'}}
CA-SB10under_review
Qualifying condition
SB 10 is permissive — it authorizes but does not require cities to zone up to 10 units / parcel near transit. Only 'applies' if Whittier has adopted an SB 10 resolution. No such resolution was identified in this pass. | title=SB 10 — Local Upzoning Authorization ; effect_on_city=None unless/until Whittier adopts an SB 10 resolution.
Adopted building codes
Statewide mandatory minimum
Click a code label to open its state-by-state adoption atlas.
Quirks & notes
- 1987 Whittier Narrows earthquake (M5.9) damaged historic Uptown; Whittier Fault (Alquist-Priolo zoned) runs NW–SE through the northeast quadrant of the city. All habitable-structure projects within a delineated EFZ require site-specific geotechnical investigation. [confirmed — CGS Alquist-Priolo mapping]
- Earlham, College Hills, and Uptown historic districts active under the Historic Resources Commission; Mills Act contracts available for qualifying owner-occupied properties. Historic-district parcels are SB 9 excluded per GC §65852.21(a)(6)(D). [confirmed — HRC active]
- Overlay stacking is common in central Whittier: Historic Preservation + Whittier Boulevard Specific Plan + Downtown Mixed-Use + Greenleaf Corridor + potential TOD layer may all apply to a single Uptown parcel. Most restrictive rule applies unless a specific plan expressly supersedes. [confirmed]
- C-2 mandates non-residential ground floor: residential is permitted only above ground floor. (c§18.30.020)
- R-3 covered-parking rule: at least 2/3 of required parking spaces must be in a covered structure (garage/carport). (c§18.48.070)
- Emergency shelters by-right in designated zone per SB 2 / SB 639 implementation at §18.06.459. (c§18.06.459)
- Development Code / Zoning Map modernization is in progress per Planning Services — MU-1/MU-2/MU-3 dimensional standards and some corridor tables are not yet fully codified in the Municode-hosted text. Verify specific dimensional standards with Planning Department prior to project submission. [partial]
- HCD SB 35/423 determination: Whittier is at the 50% affordability tier (Full 5th cycle evaluated, lower-income RHNA 80.7% complete, above-moderate 275.1% complete). Projects with ≥50% affordable qualify for SB 423 streamlined ministerial approval. [confirmed — HCD dataset 2026-04-19]
- Housing Element 6th-cycle (2021–2029) HCD-certified compliant (adopted 2022-08-16, reviewed 2022-10-12). Builder's Remedy is dormant for Whittier at current certification. [confirmed — HCD dataset 2026-04-19]
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 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] §18.16.030
- [2] §18.16.030
- [3] §18.16.030
- [4] §18.16.030
- [5] §18.16.030
- [6] §18.16.030
- [7] §18.16.030
- [8] §18.48
- [9] i§18.18
- [10] i§18.18
- [11] i§18.18
- [12] i§18.18
- [13] i§18.18
- [14] i§18.18
- [15] §18.48.070
- [16] i§18.20
- [17] i§18.20
- [18] i§18.20
- [19] §18.48.070
- [20] i§18.22
- [21] i§18.22
- [22] i§18.48.070
- [23] i
- [24] i
- [25] i
- [26] i
- [27] i§18.28
- [28] §18.48
- [29] i§18.30
- [30] §18.48
- [31] i
- [32] i§18.48
- [33] i
- [34] i§18.34
- [35] i
- [36] i
- [37] §18.08.050
- [38] §18.06.459
Research status
Publication gates
| primary url present | passed | code_source populated: https://library.municode.com/ca/whittier/codes/code_of_ordinances?nodeId=TIT18ZO (canonical Municode portal for Whittier Title 18). |
|---|---|---|
| no aggregator cited | passed | No Zoneomics, Steadily, or SitePlanGuide citations. All citations are to Municode primary source, CA Gov Code sections, CGS Alquist-Priolo mapping, and HCD primary datasets (data.ca.gov). |
| confidence tags full form | passed | Every confirmed district standard carries c§X.XX form (c§18.16.030, c§18.48.070, c§18.30.020, c§18.06.459, c§18.48); partial/inferred values carry explicit p§ or i§ status. Bare [confirmed] tags in the research markdown are paired with §-level references or migrated to c§-form in the profile JSON. |
| overlays have parameters trigger confidence | passed | All 9 overlays (FP, AP-EQ, HP, WBSP, DMU, GLC, TOD, ES, P) carry non-empty parameters objects, explicit geographic_trigger strings, and status + citation. Where live re-retrieval was blocked, retrieval_failure_reason is recorded. |
| preempt section city specific | passed | state_preemptions_applicable[] contains 9 per-law entries (ADU, SB 9, Density Bonus, AB 2097, SB 423, AB 2011, Builder's Remedy, SB 10, SB 2/SB 639). Each has qualifying_condition_checked text specific to Whittier (per-parcel exclusions, HCD tier = 50%, Housing Element certified in, historic-district SB 9 exclusions, Whittier Fault AP flag). Not a link-stub to california.md. |
Data quality
55%completeness28 confirmed12 partial22 inferred5 not found
Documented gaps
- Municode returns 403 / JS-rendered shell to scripted WebFetch — section-by-section live re-verification of §18.16.030 (R-1), §18.18 (R-2), §18.20 (R-3), §18.22 (R-4), §18.28 (C-1), §18.30 (C-2), §18.34 (M), §18.48.070 (parking) was not possible this pass; standards largely carry c§ citations from v1 extraction and consistent-with-typical-CA-zoning inference.
- MU-1 / MU-2 / MU-3 dimensional tables not yet codified in retrievable Municode text — Development Code modernization in progress.
- R-2 / R-3 / R-4 setback values (front, side, rear) not stated in retrievable excerpts.
- R-E and H-R lot-size and setback specifics not live-verified.
- FAR not specified for any district in retrievable excerpts.
- Whittier Boulevard Specific Plan document not retrieved live (PDF not linked from Planning index).
- Qualifying-major-transit-stop designation for AB 2097 not confirmed at specific Whittier intersections (Metro / Foothill Transit peak-headway data not fetched).
Known issues
cohort:needs-dom-retrievalfreshness:volatileblocker:municodedata:gaps-present
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