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 Bassett
Zip codes:91746
Bassett is an unincorporated community of about 15,500 people in the central San Gabriel Valley, between La Puente, El Monte, and the City of Industry. It is not a city. Building permits run through Los Angeles County Public Works (Building & Safety). Strong Mexican-American cultural anchor.
Unincorporated LA County, not LADBS
Bassett 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 Bassett-specific permit pathway is detailed below.
Bassett by the numbers
Rounded figures from the 2020 US Census, LA County Assessor parcel data, and LA County DPW permit records.
Population
15,500
2020 Census
Single-family homes
~3,400
LA County Assessor
Median lot size
5,500 sqft
Approximate
ADU permits filed 2025
~39
Source: HCD 2025 total (1,278) distributed proportionally across 2024 per-area shares. 2024: 45.
What makes Bassett different
Bassett sits in unincorporated LA County despite being surrounded by La Puente, El Monte, and Industry. Permits run through LA County DPW Building & Safety at the Alhambra office via EPIC-LA.
LA County ADU rules for Bassett
Last verified: 2026-04-15
Current LA County rules from Title 22 of the County Code, as applied to Bassett. 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 Bassett
LA County overlays + state-level designations that hit a meaningful share of Bassett parcels.
Watch-outs specific to Bassett
- 01
Verify jurisdiction — surrounded by 3 cities
Bassett's borders weave between La Puente, El Monte, and Industry. Parcel-by-parcel verification essential.
Amenities + civic services in Bassett
Parks, libraries, and the school district that serve the area. Context that matters for renter appeal, family relocation, and long-term resale.
Parks + sports
Bassett Park
Vineland Avenue
LA County community park.
- Baseball
- Playground
- Picnic
Libraries
Bassett Library
LA County Library
Vineland Avenue
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
Getting around Bassett
Bus-served suburban.
Transit + walkability
Bus lines
- Foothill Transit 178
- Foothill Transit 274
Walkability
Moderately walkable along Vineland.
Nearby airports
Distance + type for each major Los Angeles-area airport reachable from Bassett. Useful for travel, commute, and any flight-path noise concerns on specific parcels.
Brackett Field (POC)
~10 miGeneral aviation
Hollywood Burbank Airport (BUR)
~20 miRegional / domestic
Nearby areas to Bassett
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
Avocado Heights →
Eastern SGV unincorporated community with equestrian-zoned pockets. Large lots + LA County jurisdiction shape Accessory Dwelling Unit (ADU) opportunities.
LA County unincorporated
Valinda →
Eastern SGV unincorporated community surrounded by West Covina + La Puente + Industry. LA County jurisdiction shapes the Accessory Dwelling Unit (ADU) permitting path.
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.
Frequently asked questions about Bassett ADUs
›Can I build an ADU in Bassett?
Yes. Bassett 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 Bassett is unincorporated territory rather than a city.
›Why does Bassett use LA County rules instead of LA City rules?
Bassett 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 Bassett 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 Bassett?
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. Bassett-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 Bassett. 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 Bassett lot can do?
Our free address checker pulls real zoning, overlay, and parcel data for any Los Angeles County address, including unincorporated Bassett. 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.
Bassett 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