Hacienda Heights · ADU permits
ADU permits in Hacienda Heights
How to build a ADU in Hacienda Heights: permit pathway through LA County Public Works (Building & Safety), drawings required, local watch-outs, and a free address-level wizard for your Hacienda Heights lot.
Hacienda Heights context
Hacienda Heights sits in unincorporated LA County despite being surrounded by the cities of Industry, La Puente, and Whittier. Permits run through LA County DPW Building & Safety at the Alhambra office via the EPIC-LA online portal — not through any city department. ADU rules follow the state baseline (Gov Code §65852.2) implemented through LA County Code Title 22.140. Northern hillside parcels (the Puente Hills foothills) face hillside grading + geotech review on top of standard ADU rules.
- Permit agency
- LA County Public Works (Building & Safety)
- Median lot size
- 7,800 sqft
- ADU permits issued (2025)
- 95Source: HCD 2025 total (1,278) distributed proportionally across 2024 per-area shares. 2024: 110.
Hacienda Heights 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 LADBS. 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 Hacienda Heights address. The other drawings come from your architect or plan firm — we list pre-approved options in the wizard.
Hacienda Heights watch-outs for ADU
Overlays that hit a meaningful share of Hacienda Heights lots
Hillside Management Area (Puente Hills foothills)~25% of parcels
Northern + southern hillside parcels trigger geotech + grading-permit review.
Local quirks
Not a city — LA County DPW handles permits, not LADBS
Hacienda Heights residents sometimes confuse jurisdiction with neighboring Industry or Whittier. All Hacienda Heights permits run through LA County Public Works Building & Safety at the Alhambra office.
Hillside grading review on Puente Hills foothills
Lots along the Puente Hills foothills slope significantly and trigger LA County hillside grading review. Geotech reports typically required.
Run your Hacienda Heights address through the wizard
We pull your parcel polygon from county GIS, apply Hacienda Heights ordinance + state baseline rules, generate the site plan, and walk you through the LA County Public Works (Building & Safety) submittal. Free, no signup.