Same zip, different jurisdiction: this page covers LA County Public Works (DPW). The same zip code(s) also cover parts of La Puente (La Puente (its own permits)) and Industry (City of Industry) (Industry (City of Industry) (its own permits)). Verify your parcel's jurisdiction before filing — different agencies, different rules.
San Gabriel Valley · LA County (Unincorporated)
ADU permits in Avocado Heights
Zip codes:9174591746
Avocado Heights is an unincorporated community of about 15,000 people in the eastern San Gabriel Valley, between La Puente and the City of Industry. It is not a city. Building permits run through Los Angeles County Public Works (Building & Safety). The community is distinguished by equestrian-zoned pockets that allow horse-keeping — one of the few SGV neighborhoods with that character.
Unincorporated LA County, not LADBS
Avocado Heights is unincorporated territory. Building permits go through LA County Public Works (Building & Safety) ↗ under LA County Code Title 22, not the Los Angeles Department of Building and Safety (LADBS). Our address checker pulls real feasibility data for any LA County address; the Avocado Heights-specific permit pathway is detailed below.
Avocado Heights by the numbers
Rounded figures from the 2020 US Census, LA County Assessor parcel data, and LA County DPW permit records.
Population
15,000
2020 Census
Single-family homes
~3,800
LA County Assessor
Median lot size
9,500 sqft
Approximate
ADU permits filed 2025
~36
Source: HCD 2025 total (1,278) distributed proportionally across 2024 per-area shares. 2024: 42.
What makes Avocado Heights different
Avocado Heights is unincorporated despite proximity to La Puente + Industry. Permits run through LA County DPW Building & Safety at the Alhambra office via EPIC-LA. Equestrian-zoned pockets allow horse-keeping on minimum 1/2 acre lots — rare for the SGV.
LA County ADU rules for Avocado Heights
Last verified: 2026-04-15
Current LA County rules from Title 22 of the County Code, as applied to Avocado Heights. State preemption (Gov Code §65852.2) means the county can't reduce below the state baseline. We note where that applies.
| Max detached ADU size | 1,200 sqft (state default) |
| Max ADU height | 16 ft / 18 ft with second-story setbacks |
| Setbacks | 4 ft side / 4 ft rear (state minimum) |
| Permitting agency | LA County Public Works (Building & Safety), Alhambra office |
| Local processing time | 60 days from complete submittal (state-mandated) |
Active overlays + extra rules in Avocado Heights
LA County overlays + state-level designations that hit a meaningful share of Avocado Heights parcels.
Equestrian zoning (parts)
~30% of parcelsHorse-keeping pockets require minimum corral/paddock setbacks. ADU placement must preserve these.
Watch-outs specific to Avocado Heights
- 01
Equestrian-zone setback compatibility
Equestrian-zoned parcels have minimum corral / paddock setbacks. ADU placement must preserve these — verify before drafting plans.
Amenities + civic services in Avocado Heights
Parks, libraries, and the school district that serve the area. Context that matters for renter appeal, family relocation, and long-term resale.
Parks + sports
Avocado Heights Park
Don Julian Road
LA County community park with equestrian trails.
- Trails
- Playground
- Picnic
Libraries
Hacienda Heights Library (shared with Hacienda Heights)
LA County Library
Hacienda Boulevard
Public schools
School assignments vary by exact address. Performance levels below are from the official California School Dashboard — California's official accountability system uses colored levels (blue highest, red lowest) rather than 1-10 numeric scores.
District
Bassett Unified School District + Hacienda La Puente USD (split)
Getting around Avocado Heights
Car-dependent semi-rural.
Transit + walkability
Bus lines
- Foothill Transit 178
Walkability
Mostly car-dependent.
Nearby airports
Distance + type for each major Los Angeles-area airport reachable from Avocado Heights. Useful for travel, commute, and any flight-path noise concerns on specific parcels.
Brackett Field (POC)
~10 miGeneral aviation
Los Angeles International (LAX)
~25 miInternational
Nearby areas to Avocado Heights
Other Los Angeles-area pages worth a look. Each one runs different Accessory Dwelling Unit (ADU) rules depending on jurisdiction — we show you what changes when you cross a city or county line.
LA County unincorporated
Bassett →
Central SGV unincorporated community. LA County jurisdiction + affordable mid-tier home values shape Accessory Dwelling Unit (ADU) economics for rental + family-use builds.
LA County unincorporated
Vincent →
Central-SGV unincorporated community between Covina + West Covina. LA County jurisdiction + mid-tier home values shape the Accessory Dwelling Unit (ADU) calculus.
LA County unincorporated
Hacienda Heights →
Eastern SGV unincorporated community with strong Taiwanese-American cultural roots. Large lots + mid-tier home values + LA County jurisdiction (not LADBS) shape the Accessory Dwelling Unit (ADU) calculus.
Frequently asked questions about Avocado Heights ADUs
›Can I build an ADU in Avocado Heights?
Yes. Avocado Heights allows ADUs under LA County Code Title 22, aligned with California Gov Code §65852.2. Most single-family lots can host one ADU plus one JADU. Permits go through LA County Public Works (Building & Safety), not LADBS, since Avocado Heights is unincorporated territory rather than a city.
›Why does Avocado Heights use LA County rules instead of LA City rules?
Avocado Heights is unincorporated. It's never been formally incorporated as its own city, so LA County serves as the local government. Building permits, zoning, sheriff, libraries (in many cases), and most other services run through county departments rather than city ones.
›Where do I submit my Avocado Heights ADU permit?
Online via LA County's EPIC-LA portal, or in-person at the LA County Public Works Building & Safety counter in Alhambra (900 S. Fremont Avenue). The EPIC-LA online portal handles most ADU submittals end-to-end, so you rarely need to visit in person.
›How long does the ADU permit process take in Avocado Heights?
LA County DPW targets the state-required 60-day plan check for ADUs from a complete submittal. Hillside, VHFHSZ, or environmental-review parcels can extend timelines by 4 to 12 weeks. Avocado Heights-specific overlays may add additional time. See the watch-outs above.
›Are LA County's pre-approved ADU plans free?
Yes. LA County maintains three pre-approved standard ADU plans (Plans A, B, and C) usable in any unincorporated area, including Avocado Heights. They're free to use, similar to LADBS's YOU-ADU program. The trade-off is reduced design flexibility, but for a fast, low-cost permit path they're the strongest option.
Ready to see what your Avocado Heights lot can do?
Our free address checker pulls real zoning, overlay, and parcel data for any Los Angeles County address, including unincorporated Avocado Heights. Start there and we'll surface what applies to your specific lot.
Check your address →Reviewed by Yair Harpaz, Founder, PermitPathLA. California DRE-licensed broker with 30+ years of Los Angeles real estate and mortgage industry experience.
Avocado Heights ordinance data last reviewed .
See an error or stale rule? corrections@permitpath.la
Primary sources: LA County DPW ADU info · LA County Code Title 22