Overview
Worth knowing
- Port of Los Angeles proximity is the defining constraint in south/east Carson. PLTLO overlay constrains residential to ≤20 du/ac and mandates a 100-ft Alameda Street setback; SB 9 4-unit by-right technically applies to R-1/R-2 parcels but is functionally incompatible with port truck circulation requirements (p§9 PLTLO; Port of LA Land Use Plan).
- Brownfield remediation vs. density bonus timeline mismatch: SUITO adaptive-reuse +20% FAR bonus requires Phase II ESA + DTSC remediation (3–7 years typical). Density bonus § 65915 eligibility windows can expire during remediation; applicants should lock in affordability covenants early.
- M-3 (Heavy Industrial) dominates south Carson (petroleum refining, chemical processing). As petrochemical industry contracts, M-3 parcels are candidates for SUITO/HOTO conversion, but nonconforming industrial uses typically resist residential adjacency on air-quality/noise/vibration grounds.
+ 6 more in Quirks & notes
Districts
ind 3spec 3res_mf 2com 2res_sf 1
| Code | Name | Category | Min lot | Height | Coverage | FAR | Du/ac | Parking | Setbacks F/S/R |
|---|---|---|---|---|---|---|---|---|---|
| R-1 | Single-Family Residential | res_sf | 7,500 sf[4] | 35 ft[5] | 0.35[6] | 0.35[7] | 3[8] | 2[9] | 20[1] / 5[2] / 15[3] |
| R-2 | Medium-Density Residential | res_mf | 5,000 sf[13] | 45 ft[14] | 0.45[15] | 0.6[16] | 7.5[17] | 1.5[18] | 15[10] / 5[11] / 12[12] |
| R-3 | High-Density Residential | res_mf | 4,000 sf[22] | 55 ft[23] | 0.55[24] | 0.85[25] | 12[26] | 1[27] | 15[19] / 0[20] / 10[21] |
| C-1 | Neighborhood Commercial | com | 5,000 sf[31] | 45 ft[32] | 0.65[33] | 1[34] | — | —[35] | 10[28] / 5[29] / 10[30] |
| C-2 | General Commercial | com | 7,500 sf[39] | 55 ft[40] | 0.7[41] | 1.5[42] | — | —[43] | 10[36] / 5[37] / 10[38] |
| M-1 | Light Industrial | ind | 10,000 sf[47] | 50 ft[48] | 0.5[49] | 0.8[50] | — | —[51] | 20[44] / 10[45] / 15[46] |
| M-2 | General Industrial | ind | 20,000 sf[55] | 55 ft[56] | 0.4[57] | 0.6[58] | — | —[59] | 25[52] / 15[53] / 20[54] |
| M-3 | Heavy Industrial | ind | 40,000 sf[63] | 65 ft[64] | 0.35[65] | 0.5[66] | — | —[67] | 30[60] / 20[61] / 25[62] |
| PUD | Planned Unit Development | spec | —[71] | —[72] | —[73] | —[74] | —[75] | —[76] | —[68] / —[69] / —[70] |
| P | Port Operations | spec | —[80] | 65 ft[81] | —[82] | 0.8[83] | — | —[84] | 100[77] / —[78] / —[79] |
| AG | Agricultural / Open Space | spec | 1,742,400 sf[88] | 35 ft[89] | 0.05[90] | 0.05[91] | 0.1[92] | — | 25[85] / 25[86] / 10[87] |
Confidence: confirmed partial under review not found
Overlays
PLTLO
Port of LA Transit & Logistics Overlay
SPECParcels within approximately ½ mile of the Port of Los Angeles boundary (east of Alameda Street), the Harbor Freeway (I-110) corridor, and active rail yards serving the port.
| port_truck_circulation_preserved | required — no development that restricts truck corridor geometry |
|---|---|
| alameda_street_setback_ft | 100 |
| truck_route_internal_setback_ft | 50 |
| residential_density_du_ac_max | 20 |
| far_range | 0.6–1.5 |
| height_ft_max | 65 |
| phase_i_esa_required | 1 |
| air_quality_mitigation_required_for_residential | 1 |
HOTO
Harbor-Oriented Transit Overlay
TODCorridors adjacent to Metro transit (Green Line / C Line extension planned to Harbor Gateway; BRT routes on Vermont Avenue, Figueroa Street, and 223rd Street).
| density_du_ac_range | 20–45 |
|---|---|
| far_range | 2.0–3.5 |
| height_ft_primary | 65 |
| height_ft_with_affordable | 85 |
| ground_floor_commercial_min_frontage_pct | 60 |
| parking_reduction_pct | 25–35 |
| mixed_use_nonresidential_min_pct | 30 |
| bike_parking_min_per_2_units | 1 |
| local_density_bonus_pct | 15 |
SUITO
Steelworkers Union Industrial Transition Overlay
SPECFormer steel mill sites and adjacent industrial parcels in the Carson/Dominguez Channel corridor; contamination survey zones.
| density_du_ac_range | 15–35 |
|---|---|
| far_range | 1.2–2.5 |
| height_ft_preserve_character | 55 |
| height_ft_new_construction | 75 |
| channel_public_access_easement_ft | 25 |
| adaptive_reuse_far_bonus_pct | 20 |
| phase_ii_esa_required | 1 |
| 100yr_flood_elevation_study_required | 1 |
GILPO
Green Industrial Logistics Park Overlay
SPECIndustrial parcels designated for clean/green industrial use: electric-truck charging corridors, renewable-energy zones, and new logistics parks with ZEV infrastructure commitments.
| density_du_ac_range | 5–15 |
|---|---|
| far_range | 0.5–1.0 |
| height_ft_base | 45 |
| height_ft_warehousing | 55 |
| perimeter_industrial_buffer_ft | 50 |
| ev_chargers_min_per_10_spaces | 1 |
| solar_far_bonus_pct | 10 |
| battery_storage_far_bonus_pct | 5 |
| worker_affordability_target_ami_pct | 40 |
| landscape_coverage_min_pct | 15 |
CUGIO
Carson Urban Growth & Infill Overlay
SPECNeighborhood-scale commercial and commercial-industrial parcels in Central Carson and along the Wilmington Avenue corridor; infill opportunity parcels identified in the 2040 General Plan.
| density_du_ac_range | 12–30 |
|---|---|
| far_range | 1.0–2.0 |
| height_ft_primary | 45 |
| height_ft_with_affordable | 55 |
| setback_front_ft | 15–20 |
| setback_side_ft | 5 |
| setback_rear_ft | 12 |
| ground_floor_commercial_min_pct | 25 |
| ground_level_open_space_min_pct | 5 |
| historic_preservation_far_bonus_pct | 15 |
| parking_per_unit_base | 1.0–1.25 |
State preemptions
CA-ADU-GC§66411.7-66411.8applies
Qualifying condition
All CA cities. Carson's R-1/R-2/R-3 and mixed-use parcels must permit ADUs by-right per state law. Cannot require minimum lot size, owner-occupancy (through 2025 sunset window — verify current), or connection fees >$0 on units <750 sf. | title=Accessory Dwelling Units / JADUs ; effect_on_city=Overrides CMC Title 9 restrictions on ADU/JADU on residential parcels. One ADU and one JADU per SF lot; additional ADUs on multifamily lots per statute. Parking not required for ADUs within ½ mile of transit (AB 2097 overlap).
CA-SB9-GC§65852.21-66411.7applies
Qualifying condition
Carson has SF-zoned parcels (R-1). SB 9 applies per-parcel subject to: not in historic district, not in a very-high fire hazard severity zone (Carson is coastal plain, not VHFHSZ), FEMA flood zone exclusion check (limited SFHA in Carson — Compton Creek / Dominguez Channel tributaries), coastal zone exclusion check (Carson is inland of the Coastal Zone boundary). | title=SB 9 — HOME Act (Lot Splits + Duplex Conversion) ; effect_on_city=Ministerial up-to-4 units on qualifying R-1 parcels via lot split + duplex on each resulting lot. City cannot require lot size >40% of original, side/rear setback >4 ft, or FAR <0.8 on resulting lots. PLTLO overlay parcels are a practical constraint — see quirks — but do not legally exempt SB 9. ; per_parcel_conditional=True ; exclusions=['FEMA SFHA (per-parcel — limited in Carson)', 'historic districts (none designated city-wide)', 'coastal zone (N/A — inland)', 'very high fire hazard severity zones (N/A for Carson)']
CA-DensityBonus-GC§65915applies
Qualifying condition
Statewide. Applies to any Carson project meeting affordability thresholds (5% VLI, 10% LI, 10% moderate for-sale, or 100% affordable). Carson overlays (HOTO, CUGIO) also carry local density-bonus provisions — these stack on top of §65915 at the applicant's election (see quirks on bonus stacking). | title=State Density Bonus Law ; effect_on_city=Up to 80% density bonus on R-2, R-3, C-2, and corridor/overlay sites. Reduced parking per §65915(p) (0.5 studios/1-BR; 1.0 for 2-3 BR; 1.5 for 4+ BR on affordable component). 1–4 incentives/concessions depending on affordability tier.
CA-AB2097applies
Qualifying condition
Carson is served by Metro bus lines on Vermont Avenue, Figueroa Street, 223rd Street, and Avalon Boulevard. The Metro C Line (Green Line) extension to Torrance / Harbor Gateway is in planning (funding and timeline subject to LA Metro / federal approval). Current AB 2097 eligibility depends on which existing Metro bus corridors meet 15-min peak headway per PRC §21064.3. Where a qualifying major transit stop exists within ½ mile, AB 2097 applies. | title=AB 2097 — Parking Mandate Elimination Near Transit ; effect_on_city=No minimum parking may be required for residential, commercial, or mixed-use within ½ mile of any qualifying major transit stop. Overlaps and strengthens HOTO and CUGIO overlay parking-reduction provisions. If the Metro C Line extension becomes operational, the ½-mile corridor expands materially. ; search_performed=Metro GTFS / service-frequency data for Carson bus corridors not retrieved live; C Line extension operational status not retrieved.
Retrieval issue
Metro service-frequency queries require JS-rendered data portals or GTFS extract; not fetched within budget.
CA-SB423-GC§65913.4applies
Qualifying condition
SB 423 applies to sites zoned residential or mixed-use in cities that have not met their RHNA share. Carson's 6th-cycle RHNA allocation is in effect (2021–2029). Whether Carson is currently SB 423-eligible at the 10% vs 50% affordability trigger depends on HCD's Annual Progress Report determination. Coastal-zone and VHFHSZ exclusions do not apply in Carson. | title=SB 423 — Streamlined Ministerial Multifamily Approval (extends SB 35) ; effect_on_city=If eligible: ministerial by-right approval for projects with ≥10% affordable (50% for no-design-review). Prevailing wage / skilled-and-trained workforce applies for ≥10-unit projects. Does not apply in port/industrial-only zones (M-3, P) but does apply on R-2/R-3/C-2/HOTO/CUGIO sites. ; search_performed=HCD APR / SB 423 determination list not fetched live. ; tier=10% ; source_url=https://data.ca.gov/dataset/sb-35-data ; source_type=primary_dataset ; source_accessed=2026-04-19 ; evidence=Subject to SB 35/423 streamlined ministerial approval for qualifying projects ≥10% affordable ; hcd_data={'sb35_determination': {'jurisdiction': 'CARSON', 'county': 'LOS ANGELES', 'planning_period_evaluated': 'Full 5th', 'rhna_total': '1,698', 'total_permits': '652', 'lower_pct_complete': '21.7%', 'above_mod_pct_complete': '60.2%', 'exempt_flag': 'No', '10pct_flag': 'Yes', '50pct_flag': 'No', 'tier': '10%', 'most_recent_apr_status': 'Successful'}}
Retrieval issue
HCD's APR dashboard is JS-rendered; requires targeted retrieval not completed within budget.
CA-AB2011-GC§65912.100applies
Qualifying condition
Carson has commercial corridors (Vermont Avenue, Avalon Boulevard, Carson Street, 223rd Street, Wilmington Avenue) that qualify as 'commercially-zoned parcels along corridors' under AB 2011. 100% affordable projects are by-right on any commercial site. Mixed-income projects are by-right on corridor sites (not on industrial or office-only parcels). | title=AB 2011 — Affordable Housing on Commercial Corridors ; effect_on_city=Ministerial approval for qualifying multifamily on C-1 / C-2 corridor sites; 100% affordable bypasses discretionary review. Prevailing wage applies. Does not preempt PLTLO port-adjacent industrial land use; HOTO and CUGIO corridor parcels are prime AB 2011 candidates.
Non-applicable laws (2)
CA-BuildersRemedy-GC§65589.5(d)(5)applies
Qualifying condition
Carson adopted its 6th-cycle Housing Element with HCD-approved changes in November 2022, per the Carson 2040 General Plan Update website (carson2040.com). HCD approval of adopted Housing Element with required changes is the standard certification pathway. Absent a finding that the Housing Element has lapsed or become non-compliant, Builder's Remedy is dormant in Carson. | title=Builder's Remedy ; effect_on_city=None currently — Housing Element is HCD-approved. Status flips to applies=true if HCD later finds the Housing Element out of compliance; in that case, projects with ≥20% LI affordable (or 100% moderate) bypass local height/density/FAR/use controls.
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. It only 'applies' if Carson has adopted an SB 10 resolution. No such resolution was identified in the 2040 General Plan materials or Planning page within this research pass. | title=SB 10 — Local Upzoning Authorization ; effect_on_city=None unless/until Carson 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
- Port of Los Angeles proximity is the defining constraint in south/east Carson. PLTLO overlay constrains residential to ≤20 du/ac and mandates a 100-ft Alameda Street setback; SB 9 4-unit by-right technically applies to R-1/R-2 parcels but is functionally incompatible with port truck circulation requirements (p§9 PLTLO; Port of LA Land Use Plan).
- Brownfield remediation vs. density bonus timeline mismatch: SUITO adaptive-reuse +20% FAR bonus requires Phase II ESA + DTSC remediation (3–7 years typical). Density bonus § 65915 eligibility windows can expire during remediation; applicants should lock in affordability covenants early.
- M-3 (Heavy Industrial) dominates south Carson (petroleum refining, chemical processing). As petrochemical industry contracts, M-3 parcels are candidates for SUITO/HOTO conversion, but nonconforming industrial uses typically resist residential adjacency on air-quality/noise/vibration grounds.
- Metro C Line (Green Line) extension to Torrance / Harbor Gateway is planned but not operational. HOTO parking reductions (and AB 2097 applicability along the extension corridor) are contingent on the line becoming operational — funding/timeline is subject to LA Metro and federal approval.
- GILPO incentive stacking ambiguity: GILPO permits 10% FAR bonus for solar + 5% for battery storage (stacking). State Density Bonus §65915 also applies for affordable housing. Combined, these can create an FAR cascade or ceiling — verify city bonus-stacking policy before assuming both.
- Groundwater contamination legacy: historic industrial/petrochemical activity has produced groundwater contamination (petroleum, chlorinated solvents, methane). Projects on SUITO/PLTLO/M-3 parcels require Phase II ESA + vapor intrusion assessment; environmental covenants restrict usable building area.
- Housing Element HCD-approved 11/2022 (per carson2040.com). Builder's Remedy is NOT currently available. All housing projects proceed under local standard approval unless SB 423 / AB 2011 apply.
- Community Benefits Agreement practice: parcels adjacent to Port of LA operations frequently trigger CBA expectations (port jobs, affordable housing, environmental mitigation). CBA negotiation adds 6–18 months to entitlement timelines.
- Carson's canonical municipal code host is codepublishing.com/CA/Carson (linked from ci.carson.ca.us/CommunityDevelopment/Planning.aspx) — NOT ecode360 / municode / amlegal. codepublishing.com returns 403 to scripted WebFetch, so live section-by-section verification of Title 9 requires alternative retrieval.
Formulas
Definitions
- height
- Grade to highest point of structure (CMC Title 9 definitions).
- 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
—
——
Lot coverage
—%
——
Setbacks (F / S / R)
— ft
——
Parking
— /unit
——
Max density
— du/ac
——
Min lot size
— sf
——
Copy zoning profile
Loading…
| District | Category | Height | FAR | Coverage | Setbacks | Parking | Density | Min lot | Overlays |
|---|
Sources & references
Citations
- [1] §9
- [2] §9
- [3] §9
- [4] §9
- [5] §9
- [6] §9
- [7] §9
- [8] §9
- [9] §9
- [10] §9
- [11] §9
- [12] §9
- [13] §9
- [14] §9
- [15] §9
- [16] §9
- [17] §9
- [18] §9
- [19] §9
- [20] i§9
- [21] §9
- [22] §9
- [23] §9
- [24] §9
- [25] §9
- [26] §9
- [27] §9
- [28] §9
- [29] §9
- [30] §9
- [31] §9
- [32] §9
- [33] §9
- [34] §9
- [35] §9
- [36] §9
- [37] §9
- [38] §9
- [39] §9
- [40] §9
- [41] §9
- [42] §9
- [43] §9
- [44] §9
- [45] §9
- [46] §9
- [47] §9
- [48] §9
- [49] §9
- [50] §9
- [51] §9
- [52] §9
- [53] §9
- [54] §9
- [55] §9
- [56] §9
- [57] §9
- [58] §9
- [59] §9
- [60] §9
- [61] §9
- [62] §9
- [63] §9
- [64] §9
- [65] §9
- [66] §9
- [67] §9
- [68] §9
- [69] §9
- [70] §9
- [71] §9
- [72] §9
- [73] §9
- [74] §9
- [75] §9
- [76] §9
- [77] §9
- [78] §9
- [79] §9
- [80] §9
- [81] §9
- [82] §9
- [83] §9
- [84] §9
- [85] §9
- [86] §9
- [87] §9
- [88] §9
- [89] §9
- [90] §9
- [91] §9
- [92] §9
Research status
Publication gates
| primary url present | passed | |
|---|---|---|
| no aggregator cited | passed | |
| confidence tags full form | passed | |
| overlays have parameters trigger confidence | passed | |
| preempt section city specific | passed |
Data quality
50%completeness5 confirmed99 partial1 inferred4 not found
Documented gaps
- codepublishing.com returns 403 to scripted WebFetch — live re-verification of Title 9 §-level tables was not possible this pass; most district/overlay standards carry status=partial with v1 extraction as basis.
- Exact code-supplement date / effective date not retrieved from codepublishing (403).
- SB 423 / SB 35 eligibility determination for Carson not confirmed (HCD APR dashboard JS-rendered).
- AB 2097 applicability by corridor: Metro bus service-frequency data not retrieved; Metro C Line extension operational status not retrieved.
- Specific Plan / Precise Plan inventory (e.g., 223rd Street, Main Street, Boulevards Specific Plans if any) not retrieved from Title 9.
- Port of LA Land Use Plan interface constraints carried from v1 synthesis — specific §-level references in CMC Title 9 not verified live.
Known issues
cohort:needs-dom-retrievalfreshness:volatileblocker:codepublishingdata:gaps-present
Other cities in this state
Nearest-alphabetical profiles. Click through to compare zoning patterns side-by-side.