West Whittier-Los Nietos · ADU permits
ADU permits in West Whittier-Los Nietos
How to build a ADU in West Whittier-Los Nietos: permit pathway through LA County Public Works (Building & Safety), drawings required, local watch-outs, and a free address-level wizard for your West Whittier-Los Nietos lot.
West Whittier-Los Nietos context
West Whittier-Los Nietos is functionally distinct from both Whittier and Santa Fe Springs cities. Permits run through LA County DPW Building & Safety at the Alhambra office via EPIC-LA. Strong Mexican-American cultural identity along Whittier Boulevard.
- Permit agency
- LA County Public Works (Building & Safety)
- Median lot size
- 5,800 sqft
- ADU permits issued (2025)
- 56Source: HCD 2025 total (1,278) distributed proportionally across 2024 per-area shares. 2024: 65.
West Whittier-Los Nietos ADU ordinance
Verified against LA County Public Works (Building & Safety)'s published ordinance on 2026-04-15. State law (CA Government Code §65852.2) overrides any locally-stricter rule.
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
Not Whittier or Santa Fe Springs city. EPIC-LA portal for online submission.
Local processing time
60 days from complete submittal (state-mandated)
Drawings you'll need to submit
Type your address. See if you can build an ADU, what kind, and exactly how to permit it.
- Site plan (parcel layout + setbacks)
- Proposed floor plan
- Elevations (each side)
- Title 24 CF1R energy compliance
PermitPathLA generates the site plan free from your West Whittier-Los Nietos address. The other drawings come from your architect or plan firm — we list pre-approved options in the wizard.
West Whittier-Los Nietos watch-outs for ADU
Local quirks
Verify LA County vs Whittier jurisdiction
The unincorporated boundaries weave between Whittier + Santa Fe Springs city limits. Parcel-by-parcel verification is essential.
Run your West Whittier-Los Nietos address through the wizard
We pull your parcel polygon from county GIS, apply West Whittier-Los Nietos ordinance + state baseline rules, generate the site plan, and walk you through the LA County Public Works (Building & Safety) submittal. Free, no signup.