Zoning › California › Los Angeles County › Hawthorne

Hawthorne, CA Zoning

Euclidean-zoning. 10 districts · 5 overlays · 7 applicable state preemptions.

Overview

Code type
euclidean
Naming convention
numeric-density-tier

Hawthorne Chapter/Title uses numbered-tier naming: R1 / R2 / R3 / R4 (Residential, single-family through high-density); C1 / C2 / C3 (Commercial, neighborhood through CBD); O (Office); M1 / M2 (Manufacturing, light and heavy). Standard CA legacy Euclidean code. District inventory and names inherited from v1 with status=partial pending browser-assisted retrieval.

Worth knowing
  • LA Metro renamed all rail lines to letter designations in 2020. Hawthorne is served by the C Line (formerly Green Line) at Hawthorne/Lennox Station at the I-105 (Century Freeway) median on Hawthorne's northern boundary. The C Line was formerly the Green Line — v1 profile's repeated use of 'Green Line' is obsolete terminology. [confirmed via Wikipedia C Line (Los Angeles Metro) 2020 renaming]
  • LA Metro K Line (Crenshaw/LAX) Redondo Beach Station straddles the Hawthorne/Redondo Beach border; its ½-mile buffer reaches into southern Hawthorne as of southern-extension operations late 2024. This adds a SECOND AB 2097 parking-preemption zone to Hawthorne alongside the C Line. [confirmed via Wikipedia K Line (Los Angeles Metro) + Redondo Beach Station]
  • Hawthorne Municipal Airport (KHHR, also known as Jack Northrop Field) has a SINGLE runway 7/25 (concrete, 4,884 ft × 100 ft). FAA identifier is HHR, NOT 'HWH' as the v1 profile stated, and runway designations '14/32 and 05/23' in v1 are fabrications. Airport overlay treatment must use the corrected runway geometry and FAA Part 77 surfaces. [confirmed via Wikipedia Hawthorne Municipal Airport (California)]

+ 7 more in Quirks & notes

Districts

res_sf 2res_mf 2com 2ind 2cbd 1off 1
CodeNameCategory Min lotHeight CoverageFAR Du/acParking Setbacks F/S/R
R1Single-Family Residentialres_sf5,500 sf[4]35 ft[5]0.4[6]0.4[7]—2[8]20[1] / 6[2] / 17[3]
R2Two-Family Residentialres_sf4,500 sf[12]45 ft[13]0.5[14]——1.75[15]17[9] / 5[10] / 17[11]
R3Multi-Family Residentialres_mf3,000 sf[19]65 ft[20]0.6[21]——1.25[22]12[16] / 7[17] / 12[18]
R4High-Density Multi-Family Residentialres_mf2,500 sf[26]85 ft[27]0.7[28]——1[29]5[23] / 5[24] / 12[25]
C1Neighborhood Commercialcom—45 ft[31]—0.87[32]——7[30] / — / —
C2General Commercialcom—65 ft[34]—1.5[35]——5[33] / — / —
C3Central Business Districtcbd—85 ft[37]—2[38]——2[36] / — / —
OOfficeoff—60 ft[40]—1.25[41]——15[39] / — / —
M1Light Industrialind—70 ft[42]————— / — / —
M2Heavy Industrialind—70 ft[43]————— / — / —

Confidence: confirmed partial under review not found

Overlays

LAX-AIA
LAX Airport Influence Area / Noise Compatibility Overlay
AP
p§HMC-airport-overlay
HHR-AIA
Hawthorne Municipal Airport (KHHR / Jack Northrop Field) Airspace and Compatibility Overlay
AP
p§HMC-airport-overlay
C-LINE-AB2097
C Line (formerly Green Line) Station Area — AB 2097 Parking Preemption Zone (NOT a local overlay)
TOD
c§AB2097-GC§65863.2 + c§Metro-C-Line-Hawthorne-Lennox-station
HB-CORR
Hawthorne Boulevard Commercial Corridor
COR
p§HMC-corridor + c§AB2011-GC§65912.101
AERO-IND
Aviation / Aerospace Industrial Area (SpaceX / Former Northrop Corridor)
spec
p§HMC-M1-M2

State preemptions

CA-ADU-GC§66411.7-66411.8applies
Qualifying condition
Applies to all CA cities unconditionally. Hawthorne (general-law city, population 88,083 per 2020 Census; Los Angeles County pop ~9.66M) has R1 / R2 / R3 / R4 residential base districts all eligible for ADU / JADU by-right approval. State law preempts any inconsistent HMC provision.
Effect
Ministerial approval with 60-day shot clock; up to 1,200 sf detached ADUs; up to 500 sf JADUs; no owner-occupancy requirement; 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§65852.21-66411.7applies
Qualifying condition
Hawthorne is a CA general-law city with R1 single-family zoning. Hawthorne has NO CalFire Very High Fire Hazard Severity Zone (flat South Bay terrain), NO coastal zone (inland of El Segundo and Manhattan Beach), and no Chapter 30 / Title 17 historic preservation overlay confirmed. FEMA SFHA coverage in Hawthorne is limited (the city is outside the LA River 100-year floodplain; localized Zone AE / X maps apply to isolated drainage parcels — per-parcel check required).
Effect
Ministerial up-to-4-units by-right on qualifying R1 parcels (lot split + two units on each resulting lot). City cannot require post-split lot <1,200 sf, cannot impose setbacks >4 ft side/rear, and cannot require FAR lower than what permits 800 sf per unit. SB 450 (2024) strengthens procedural limits on local SB 9 ordinances. Preempts HMC R1 minimum-lot and single-unit restrictions on qualifying parcels.
CA-DensityBonus-GC§65915applies
Qualifying condition
Applies statewide to any Hawthorne project meeting affordability thresholds (5% VLI, 10% LI, 10% moderate for-sale, or 100% affordable). AB 1287 allows stacking of two bonuses to reach up to 100% density increase on qualifying R3 / R4 / mixed-use commercial parcels. State law floors any local companion ordinance.
Effect
Up to 100% density bonus (AB 1287 stacked) on R3 / R4 and mixed-use commercial parcels; concessions / incentives (1–3 depending on VLI / LI / moderate percentage) can waive base du_ac maxima, height maxima within reason, and specific setback standards. State § 65915(p) parking ratios (0.5 for studio/1BR, 1.0 for 2–3BR, 1.5 for 4+BR) preempt HMC parking ratios on qualifying affordable components.
CA-AB2097applies
Qualifying condition
Hawthorne is directly served by LA Metro C Line (formerly Green Line, renamed 2020) with Hawthorne/Lennox Station at Acacia Ave / I-105 in northern Hawthorne. Additionally the K Line (Crenshaw/LAX) Redondo Beach Station, opened for southern-extension operations late 2024, straddles the Hawthorne / Redondo Beach border — its ½-mile buffer extends into southern Hawthorne. Both are 'major transit stops' under PRC § 21064.3.
Effect
No minimum parking requirement may be imposed on residential, commercial, or mixed-use projects within ½ mile of a qualifying major transit stop. Preempts HMC parking ratios within each ½-mile buffer. Stacks with SB 9, State Density Bonus, AB 2011, and SB 423 for eligible corridor parcels.
CA-SB423-GC§65913.4applies
Qualifying condition
SB 423 applies to sites zoned residential or mixed-use in jurisdictions not meeting their 6th-cycle RHNA allocation. Hawthorne is part of SCAG's 6th-cycle RHNA (2021–2029). The SCAG RHNA allocation for Hawthorne cited in the repair coordination brief is ~3,087 units. The 10% / 50% affordability trigger depends on HCD's Annual Progress Report SB 35/423 determination for Hawthorne.
Retrieval issue
HCD Annual Progress Report / SB 35-423 determination dashboard is JS-rendered and was not fetched live in this pass. Hawthorne's determination (10%, 50%, or exempt) requires dashboard query at data.ca.gov / HCD APR dashboard.
CA-AB2011-GC§65912.100applies
Qualifying condition
Hawthorne has commercially-zoned corridor parcels along Hawthorne Boulevard (SR-107), Rosecrans Avenue, Imperial Highway, and El Segundo Boulevard that qualify as 'commercial corridors' under AB 2011 (≥70 ft wide, predominantly commercial / mixed-use). 100% affordable projects are ministerially approved on any commercial site; mixed-income projects qualify on corridor sites at densities not less than the jurisdiction's default for commercial or 30 du/ac (whichever is higher).
Effect
Ministerial approval for qualifying multifamily on C1 / C2 / C3 corridor sites. 100% affordable bypasses discretionary review entirely. Minimum density floor (30 du/ac or jurisdiction default, whichever greater) preempts lower local caps. Prevailing wage required. Overlaps with SB 423 — developers choose pathway.
CA-BuildersRemedy-GC§65589.5(d)(5)applies
Qualifying condition
Hawthorne is part of the SCAG 6th-cycle RHNA (2021–2029) with an allocation of ~3,087 units. Builder's Remedy is live during any period in which the Housing Element is HCD-non-certified; dormant while certified. HCD Housing Element Compliance status for Hawthorne requires live dashboard check.
Retrieval issue
HCD Housing Element Compliance dashboard is JS-rendered; Hawthorne's current certification status was not fetched live this pass. Treat as under_review and verify per-project.
Non-applicable laws (1)
CA-SB10not_applicable
Qualifying condition
SB 10 is permissive: it authorizes but does not require cities to upzone to 10 units/parcel near transit or urban infill via simple council resolution (CEQA-exempt). No evidence Hawthorne has adopted an SB 10 resolution; the HMC as retrieved contains no SB 10-adoption reference.
Effect
None unless/until Hawthorne council adopts an SB 10 resolution.

Adopted building codes

Statewide mandatory minimum

IBC
2024 CBC
IRC
2024 CRC
NEC
2023
IFC
2024
IECC (Residential)
2024 CALGreen
IECC (Commercial)
2024 CALGreen

Click a code label to open its state-by-state adoption atlas.

Amendment history

DateKindCitation
2026-04-19retrieval attemptScripted WebFetch blocked (403) on resolve.ecode360.com/codes/hawthorne-ca/; qcode.us legacy URL redirected to ecode360

Quirks & notes

  • LA Metro renamed all rail lines to letter designations in 2020. Hawthorne is served by the C Line (formerly Green Line) at Hawthorne/Lennox Station at the I-105 (Century Freeway) median on Hawthorne's northern boundary. The C Line was formerly the Green Line — v1 profile's repeated use of 'Green Line' is obsolete terminology. [confirmed via Wikipedia C Line (Los Angeles Metro) 2020 renaming]
  • LA Metro K Line (Crenshaw/LAX) Redondo Beach Station straddles the Hawthorne/Redondo Beach border; its ½-mile buffer reaches into southern Hawthorne as of southern-extension operations late 2024. This adds a SECOND AB 2097 parking-preemption zone to Hawthorne alongside the C Line. [confirmed via Wikipedia K Line (Los Angeles Metro) + Redondo Beach Station]
  • Hawthorne Municipal Airport (KHHR, also known as Jack Northrop Field) has a SINGLE runway 7/25 (concrete, 4,884 ft × 100 ft). FAA identifier is HHR, NOT 'HWH' as the v1 profile stated, and runway designations '14/32 and 05/23' in v1 are fabrications. Airport overlay treatment must use the corrected runway geometry and FAA Part 77 surfaces. [confirmed via Wikipedia Hawthorne Municipal Airport (California)]
  • SpaceX corporate HQ relocated to Starbase, Brownsville TX in 2024. The Hawthorne factory at 1 Rocket Road continues to operate as the principal Falcon/Dragon manufacturing and mission-control facility and occupies the former Northrop Corporation B-2 assembly building. References to SpaceX as a present-tense 'headquarters' in v1 are outdated. [confirmed via Wikipedia Hawthorne, California]
  • v1 profile cited 'Hollywood Park Specific Plan' in the coordination brief as an expected Hawthorne overlay; this is incorrect — Hollywood Park (the former racetrack, now redeveloped as SoFi Stadium / Hollywood Park) is in INGLEWOOD, not Hawthorne. Do not include a Hollywood Park specific plan in the Hawthorne record. [confirmed — Hollywood Park is at 1001 Stadium Dr, Inglewood CA 90301]
  • v1 profile included a 'Floodplain Overlay' (FP) as a Hawthorne local overlay — fabricated. Hawthorne is in flat South Bay terrain (~20–70 ft MSL) outside the LA River 100-year floodplain. FEMA SFHA coverage is limited to isolated drainage parcels and is enforced through FEMA NFIP ordinance-by-reference + CA state requirements, NOT a discrete HMC floodplain overlay. [confirmed this pass — matches Compton v1 fabrication pattern]
  • v1 profile included an 'Aviation/Aerospace Specific Plan' (AASP) — retained as partial pending browser-based HMC retrieval; no separate aerospace specific plan ordinance was retrieved live. SpaceX operations are governed by M1/M2 base industrial zoning plus FAA / SCAQMD / CEQA regulatory layers, not a zoning overlay. [partial — pending browser verification]
  • qcode.us/codes/hawthorne legacy URL 301-redirects to resolve.ecode360.com/codes/hawthorne-ca/, which returns 403 Forbidden to scripted WebFetch. This is the same Cloudflare-gated pattern seen for Bakersfield (municipal.codes), Bellflower, Compton (ecode360). source-portals.md should continue to flag ecode360-hosted CA cities as requiring browser-assisted retrieval. [platform_note]
  • Hawthorne SCAG 6th-cycle RHNA allocation is ~3,087 units (per coordination brief). Active housing element cycle + LA-basin RHNA pressure make Builder's Remedy and SB 423 both materially significant even before HCD-dashboard confirmation. [inferred from coordination brief]
  • Hawthorne is in the LAX Airport Influence Area as mapped by LA County ALUC. All major redevelopment projects in northern / western Hawthorne may require ALUC consistency finding in addition to local entitlement. [confirmed via ALUC LAX ALUCP standard coverage of south-bay cities]

Formulas

Definitions

height
Measured to highest point of structure per HMC; reduced under LAX / Hawthorne Municipal Airport (HHR) airspace surfaces on a parcel-specific basis.
lot_coverage
Building footprint / lot area.
far
Gross floor area / lot area.
du_ac
impervious_cover
setback_front
Front property line to nearest building face.
setback_side
Side property line; varies by district.
setback_rear
Rear property line.
parking
Spaces per dwelling unit; preempted to zero within ½ mile of C Line Hawthorne/Lennox Station and adjacent K Line Redondo Beach Station per AB 2097.

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
buildable_envelope_sf
buildable_width_ft * buildable_depth_ft
max_stories_approx
max_height_ft / 10
max_gfa_from_envelope
min(buildable_envelope_sf * max_stories_approx, max_gfa_sf)
parking_required
units * parking

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.

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Max height
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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

Primary source
Hawthorne Municipal Code (Title 17 — Zoning presumed)
Scripted-retrieval blocked 2026-04-19; effective date requires browser retrieval · retrieved 2026-04-19
Citations
  1. [1] §HMC-R1
  2. [2] §HMC-R1
  3. [3] §HMC-R1
  4. [4] §HMC-R1
  5. [5] §HMC-R1
  6. [6] i
  7. [7] i
  8. [8] §HMC-R1
  9. [9] §HMC-R2
  10. [10] §HMC-R2
  11. [11] §HMC-R2
  12. [12] §HMC-R2
  13. [13] §HMC-R2
  14. [14] i
  15. [15] §HMC-R2
  16. [16] §HMC-R3
  17. [17] §HMC-R3
  18. [18] §HMC-R3
  19. [19] i
  20. [20] §HMC-R3
  21. [21] i
  22. [22] §HMC-R3
  23. [23] §HMC-R4
  24. [24] §HMC-R4
  25. [25] §HMC-R4
  26. [26] i
  27. [27] §HMC-R4
  28. [28] i
  29. [29] §HMC-R4
  30. [30] §HMC-C1
  31. [31] §HMC-C1
  32. [32] §HMC-C1
  33. [33] §HMC-C2
  34. [34] §HMC-C2
  35. [35] §HMC-C2
  36. [36] §HMC-C3
  37. [37] §HMC-C3
  38. [38] §HMC-C3
  39. [39] §HMC-O
  40. [40] §HMC-O
  41. [41] §HMC-O
  42. [42] §HMC-M1
  43. [43] §HMC-M2

Research status

Publication gates

primary url presentpassed
no aggregator citedpassed
confidence tags full formpassed
overlays have parameters trigger confidencepassed
preempt section city specificpassed

Data quality

42%completeness14 confirmed24 partial8 inferred
Documented gaps
  • HMC chapter/title number for zoning (v1 said Title 9, common CA convention is Title 17) — not confirmed live
  • Exact § references for LAX AIA overlay, HHR AIA overlay, Hawthorne Boulevard corridor provisions (if any)
  • Hawthorne residential and commercial dimensional tables (R1–R4, C1–C3, O, M1–M2) — v1 values retained at status=partial pending browser-assisted HMC retrieval
  • Parking ratio tables by use — v1 values retained at status=partial
  • Presence / non-presence of a formal Hawthorne Boulevard corridor specific plan
  • Presence / non-presence of a formal aerospace / aviation specific plan
  • HCD Housing Element certification status (Builder's Remedy gating) for Hawthorne
  • HCD APR SB 35/423 determination (10% vs 50% vs exempt) for Hawthorne
  • Exact ALUC LAX ALUCP compatibility-zone mapping for Hawthorne parcels (CNEL 60 / 65 / 70 / 75 contours)
  • Exact HHR ALUCP compatibility-zone mapping
  • Updated post-2024 SpaceX tenancy details at 1 Rocket Road (factory-only vs some corporate retention)

Known issues

cohort:needs-dom-retrievalfreshness:volatileblocker:ecode360data:gaps-present

Verification

last_verified_at2026-04-19T00:00:00Z
verifier_specialisthwthrn-2026-04-19-v2
verifier_version1.0
verification_resultpassed_pending_browser_retrieval
atomic_claims_checked18
atomic_claims_passed18
atomic_claims_failed0
failed_claims
narrative_refnarratives/hawthorne-ca/hwthrn-2026-04-19-v2.json

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