Zoning › California › Orange County › Aliso Viejo

Aliso Viejo, CA Zoning

Euclidean-zoning. 13 districts · 5 overlays · 5 applicable state preemptions.

Overview

Code type
euclidean
Naming convention
mixed

Aliso Viejo implements standard Euclidean districts including RL (Low), RM (Medium), RH (High), RVH (Very High) density residential, commercial districts (CT, CC, CN), professional office (PO), business park (BP-1, BP-2), community facility (CF), open space recreation (OR), and open space preservation (OS). Combined with overlay districts: PRD, CZ, MU/R, Floodplain, and Health Facilities.

Worth knowing
  • Health Facilities Overlay (Section 15.22.220) establishes a 3-acre minimum lot size and a 300-foot buffer from other health facilities, residential uses, schools, parks, and religious institutions.
  • The CT (Town Center Commercial) district allows high-density mixed-use development up to 1.25 FAR, serving as the commercial and programmatic core of the city.
  • Under the MU/R (Mixed Use/Residential) Overlay, residential developments follow RVH regulations (up to 50 du/ac density, 65 ft height limit) while nonresidential uses follow base commercial rules.

+ 1 more in Quirks & notes

Districts

res_mf 3com 3spec 3ind 2res_sf 1off 1
CodeNameCategory Min lotHeight CoverageFAR Du/acParking Setbacks F/S/R
RLLow Density Residentialres_sf3,000 sf[4]35 ft[5]——8[6]—10[1] / 10[2] / 10[3]
RMMedium Density Residentialres_mf5,000 sf[10]35 ft[11]60[12]—18[13]—20[7] / 20[8] / 20[9]
RHHigh Density Residentialres_mf5,000 sf[17]45 ft[18]60[19]—30[20]—20[14] / 20[15] / 20[16]
RVHVery High Density Residentialres_mf5,000 sf[24]65 ft[25]60[26]—50[27]—20[21] / 20[22] / 20[23]
CTTown Center Commercialcom—45 ft[31]—1.25[32]——20[28] / 0[29] / 0[30]
CCCommunity Commercialcom—35 ft[36]—1[37]——20[33] / 0[34] / 0[35]
CNNeighborhood Commercialcom—35 ft[41]—0.6[42]——20[38] / 0[39] / 0[40]
POProfessional Officeoff—65 ft[46]—1.5[47]——20[43] / 0[44] / 0[45]
BP-1Business Park 1ind—45 ft[51]—1[52]——15[48] / 0[49] / 0[50]
BP-2Business Park 2ind—45 ft[56]—1[57]——15[53] / 0[54] / 0[55]
CFCommunity Facilitiesspec—50 ft[61]—0.6[62]——10[58] / 0[59] / 0[60]
OROpen Space Recreationspec—35 ft[66]—0.5[67]——10[63] / 0[64] / 0[65]
OSOpen Space Preservationspec—35 ft[71]————10[68] / 0[69] / 0[70]

Confidence: confirmed partial under review not found

Overlays

PRD
Planned Residential Development Overlay
PD
§15.10.040

Applied to residential base districts to permit master-planned residential developments.

setbacksSet per development plan or tract map approval, overriding base residential setbacks.
design_standardsSubject to precise development plans and architectural review.
CZ
Coastal Zone Overlay
CON
§15.26.050

All properties located within the state-designated California Coastal Zone boundaries.

permit_requiredCoastal Development Permit (CDP) required for all qualifying developments under Chapter 15.26.
environmentalStrict protective controls on grading, coastal scenic resource protection, and native habitat conservation.
MU_R
Mixed Use/Residential Overlay
SPEC
§15.26.060

As mapped on the Aliso Viejo Official Zoning Map to designate master planned commercial/residential integration zones.

base_interactionResidential developments follow RVH (Very High Density Residential) district regulations. Nonresidential developments follow the underlying commercial base zone.
FP
Floodplain Management Overlay
FP
§7.50.010

Areas of Special Flood Hazard as identified by FEMA on its Flood Insurance Rate Maps (FIRMs).

elevationAll residential lowest floors must be elevated at least 2 feet above the Base Flood Elevation (BFE) §7.50.150.
non_residentialNon-residential structures must be elevated 2 feet above BFE or dry-floodproofed with utility sealing.
permit_requiredFlood Hazard Development Permit required prior to any construction or grading.
HF_OM
Health Facilities and Outpatient Medical Uses Overlay
SPEC
§15.22.220

Applied to nonresidential zones (PO, BP, CT, CC, CN) per Chapter 15.22.

min_lot_acre3
separation_buffer_ft300
cup_requiredCUP required for hospital/health facilities; outpatient medical uses typically permitted by right subject to parking and administrative standards.

State preemptions

ca-density-bonus-lawapplies
Qualifying condition
Statewide mandate (GC §65915). Applies to Aliso Viejo (pop. 52,176, 2020 Census). Enables housing projects to gain density bonuses on multifamily and mixed-use sites based on affordable unit percentages.
Source
California Government Code §65915
Effect
Up to 80% base density bonus (stacked with AB 1287 to 100% bonus); reduced parking ratios per §65915(p); and 1 to 4 development incentives/concessions depending on the affordability tier.
ca-sb9-home-actapplies
Qualifying condition
Aliso Viejo contains single-family zones (RL) which are subject to SB 9 ministerial lot splits and second-unit conversions. Portions within coastal or floodplain overlays are excluded on a per-parcel basis.
Source
California Government Code §65852.21, §66411.7
Effect
Enables up to 4 units by-right on any qualifying single-family residential parcel via a combination of lot split and/or two duplex units per parcel; caps required side and rear yard setbacks at 4 feet; overrides local parcel size minimums.
ca-sb423-streamlinedapplies
Qualifying condition
Aliso Viejo is subject to SB 35/423 streamlined ministerial approval at the 10% affordability threshold. The city's Housing Element is certified compliant, but it has not met above-moderate-income RHNA permit milestones (above-moderate permits completed 0.0%, lower-income RHNA target of 39 met at 5842.9%). | tier=10% ; source_url=https://data.ca.gov/dataset/sb-35-data ; source_type=primary_dataset ; source_accessed=2026-05-30 ; evidence=Subject to 10% streamlined affordability tier per HCD APR.
Source
CA HCD SB 35/423 Streamlining Determination List (2026)
Effect
Bypasses local discretionary review, hearing processes, and CEQA review processes for multi-family residential or mixed-use developments with at least 10% dedicated affordable housing units. Prevailing wage rules apply for projects containing 10 or more units.
ca-ab2011-affordable-housing-high-roadapplies
Qualifying condition
Aliso Viejo incorporates qualifying commercial zones (e.g., CT Town Center Commercial, CC Community Commercial, Professional Office) along transit/commercial corridors that meet AB 2011 corridor requirements.
Source
California Government Code §65912.100 et seq.
Effect
Provides ministerial by-right development pathways for multi-family or mixed-use residential projects on qualifying commercially-zoned parcels along transit corridors, overriding base density and setbacks.
ca-adu-jaduapplies
Qualifying condition
Statewide mandate. Applies to all residential and mixed-use zones in California including Aliso Viejo (RL, RM, RH, RVH). Overrides local restrictions to allow accessory dwellings on single-family and multi-family lots.
Source
California Government Code §65852.2, §65852.22
Effect
Enables at least one accessory dwelling unit (ADU) up to 1200 sf and one junior accessory unit (JADU) up to 500 sf on single-family properties, and multiple ADUs on multi-family lots, bypassing local parking and setback minima (except 4 ft).
Non-applicable laws (3)
ca-ab2097-parking-transitdoes_not_apply
Qualifying condition
Aliso Viejo has no qualifying major transit stops (passenger rail stations, rapid transit corridors, or high-frequency bus intersections) within its jurisdiction or within 0.5 miles of its boundaries. Under GC §65863.2, parking minimums are not eliminated citywide.
Source
California Public Resources Code §21064.3 major transit stop regulations
Effect
Parking minimum mandate elimination near transit remains dormant and inactive citywide.
ca-builders-remedydoes_not_apply
Qualifying condition
Aliso Viejo possesses a certified compliant 6th cycle Housing Element, certified by HCD on June 24, 2024. Therefore, the city is not subject to Builder's Remedy projects. | source_url=https://data.ca.gov/dataset/housing-element-compliance-report ; source_type=primary_dataset ; source_accessed=2026-05-30 ; evidence=Housing element certified compliant — not subject
Source
CA HCD Housing Element Compliance Report (2026)
Effect
Builder's Remedy remains inactive and dormant for the current cycle as long as HCD certification remains active.
ca-sb10-local-upzoningdoes_not_apply
Qualifying condition
Aliso Viejo has not adopted a local SB 10 resolution. Therefore, SB 10 local density upzoning does not apply.
Source
California Government Code §65913.5
Effect
None unless the City Council chooses to adopt an SB 10 resolution in the future.

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
2024-06-24supplement effectiveAVMC Title 15 Online Code Archive (CodePublishing)

Quirks & notes

  • Health Facilities Overlay (Section 15.22.220) establishes a 3-acre minimum lot size and a 300-foot buffer from other health facilities, residential uses, schools, parks, and religious institutions.
  • The CT (Town Center Commercial) district allows high-density mixed-use development up to 1.25 FAR, serving as the commercial and programmatic core of the city.
  • Under the MU/R (Mixed Use/Residential) Overlay, residential developments follow RVH regulations (up to 50 du/ac density, 65 ft height limit) while nonresidential uses follow base commercial rules.
  • Cloudflare's automated scraping protection surrounds direct CodePublishing requests, requiring Wayback CDX crawl workarounds.

Formulas

Definitions

height
The vertical distance from the average contact ground level of the building to the highest point of the coping of a flat roof or the deck line of a mansard roof, or to the average height of the highest gable of a pitch or hip roof §15.04.030.
density
Dwelling units per net acre.
setback
The minimum horizontal distance required between building face and the relative property line.
lot_coverage
Maximum buildable lot footprint area as a percentage of the total lot area.
far
Total gross building square footage / net parcel area.

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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Parking
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District Category Height FAR Coverage Setbacks Parking Density Min lot Overlays

Sources & references

Primary source
https://www.codepublishing.com/CA/AlisoViejo/
retrieved 2026-05-30
Citations
  1. [1] §15.10.030
  2. [2] §15.10.030
  3. [3] §15.10.030
  4. [4] §15.10.030
  5. [5] §15.10.030
  6. [6] §15.10.030
  7. [7] §15.10.030
  8. [8] §15.10.030
  9. [9] §15.10.030
  10. [10] §15.10.030
  11. [11] §15.10.030
  12. [12] §15.10.030
  13. [13] §15.10.030
  14. [14] §15.10.030
  15. [15] §15.10.030
  16. [16] §15.10.030
  17. [17] §15.10.030
  18. [18] §15.10.030
  19. [19] §15.10.030
  20. [20] §15.10.030
  21. [21] §15.10.030
  22. [22] §15.10.030
  23. [23] §15.10.030
  24. [24] §15.10.030
  25. [25] §15.10.030
  26. [26] §15.10.030
  27. [27] §15.10.030
  28. [28] §15.18.030
  29. [29] §15.18.030
  30. [30] §15.18.030
  31. [31] §15.18.030
  32. [32] §15.18.030
  33. [33] §15.18.030
  34. [34] §15.18.030
  35. [35] §15.18.030
  36. [36] §15.18.030
  37. [37] §15.18.030
  38. [38] §15.18.030
  39. [39] §15.18.030
  40. [40] §15.18.030
  41. [41] §15.18.030
  42. [42] §15.18.030
  43. [43] §15.18.030
  44. [44] §15.18.030
  45. [45] §15.18.030
  46. [46] §15.18.030
  47. [47] §15.18.030
  48. [48] §15.18.030
  49. [49] §15.18.030
  50. [50] §15.18.030
  51. [51] §15.18.030
  52. [52] §15.18.030
  53. [53] §15.18.030
  54. [54] §15.18.030
  55. [55] §15.18.030
  56. [56] §15.18.030
  57. [57] §15.18.030
  58. [58] §15.26.030
  59. [59] §15.26.030
  60. [60] §15.26.030
  61. [61] §15.26.030
  62. [62] §15.26.030
  63. [63] §15.26.030
  64. [64] §15.26.030
  65. [65] §15.26.030
  66. [66] §15.26.030
  67. [67] §15.26.030
  68. [68] §15.26.030
  69. [69] §15.26.030
  70. [70] §15.26.030
  71. [71] §15.26.030

Research status

Publication gates

primary url presentpassedhttps://www.codepublishing.com/CA/AlisoViejo/
no aggregator citedpassedscan clean
confidence tags full formpassedall records carry explicit section citations
overlays have parameters trigger confidencepassedall 5 overlays carry trigger, parameters, and section citations
preempt section city specificpassed8 California laws parsed with explicit Aliso Viejo numeric thresholds and evidence strings

Data quality

90%completeness65 confirmed

Verification

last_verified_at2026-05-30T00:00:00Z
verifier_specialistantigravity-verifier
verifier_version1.0
verification_resultpassed

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