Can you build an ADU in Highland Park, Los Angeles?

Yes — about 87% of Highland Park's roughly 12,594 analyzed single-family lots can add an ADU by-right. Most are zoned R1, which typically allows a detached ADU up to about 1,200 sq ft. These are zoning-only estimates; overlays like hillside, coastal, or historic can change the answer, so check your exact address for the rule that applies to your lot.

Check your exact address →

ADU eligibility in Highland Park

Lots analyzed
12,594
Likely eligible
87%
Typical max size
1,200 sq ft
Median lot
5,182 sq ft

Typical zoning in Highland Park

The most common zones here, by number of analyzed lots. Your parcel’s zone sets which ADU rules apply.

ZoneLotsADU outlook
R16,311Allowed
RD22,789Allowed
RD1.51,211Allowed
C4706Needs review
PF406Not allowed

Eligibility is zoning-only (zoning-only (overlays excluded; see checker for per-lot verdict)). Ruleset la-2026.06. Neighborhood boundaries: Los Angeles Times / Mapping L.A. (CC BY 4.0).

Highland Park ADU questions

In most of Highland Park, yes. About 87% of its analyzed single-family lots can add an accessory dwelling unit by-right, most commonly on R1-zoned parcels. Your lot's exact answer depends on its zone, size, and any overlays — enter your address to see the rule that applies to you.

ADUs in other LA neighborhoods

Historic South-CentralHollywoodHollywood HillsHollywood Hills WestHyde ParkJefferson ParkKoreatownLake Balboa

Find out what your backyard allows

Enter your Los Angeles address and get an instant, sourced ADU verdict — free, no signup.

Check my lot