Hills & Canyons · Zoning

Zoning rules that shape Hills & Canyons ADUs

State ADU law sets the floor everywhere in California. Hills & Canyons layers local rules on top — overlays, hillside ordinances, design districts. Here's what tends to control the envelope on a Hills & Canyons parcel.

Local overlays and ordinances

R1H (Hillside Restricted) — state ADU law applies but BHO limits the envelope.
Baseline Hillside Ordinance: by-right floor area scales down with slope.
Mulholland Specific Plan along the ridge — Director's Determination required.
Beverly Hills R1 zones run a separate design review committee.

What state law guarantees

Up to 1,200 sqft for a detached ADU on most R1 lots.
Up to 500 sqft for a JADU inside the existing footprint.
No parking requirement within ½ mile of major transit.
60-day ministerial review on a complete application.

How we map your lot

Before drawing, we pull the parcel against the county GIS, the city zoning map, and any overlay layers (HPOZ, hillside, coastal, fire). The first site walk tells us within an hour whether the project is ministerial or whether anything kicks it into discretionary review.

Reference

Terms and guides for this page

Glossary terms

BHO (Baseline Hillside Ordinance)
City of LA rules governing residential construction on hillside lots — height, grading, haul routes.
HPOZ (Historic Preservation Overlay Zone)
City of LA designation that imposes design review on alterations within a historic neighborhood.
Soils Report
Engineering study of subsurface soil conditions, required for hillside and certain ADU lots.
LADBS (LA Department of Building and Safety)
The City of Los Angeles agency that issues building permits and conducts inspections.
LADWP (LA Department of Water and Power)
City of LA's water and electrical utility — handles ADU service connections and meter sets.
ADU (Accessory Dwelling Unit)
A self-contained second home on a residential lot, with its own kitchen, bath, and entrance.

Field guides

The Los Angeles ADU permit process, step by step
Permitting an ADU inside the City of Los Angeles takes about 8–11 weeks of plan check (LADBS) plus 2–4 weeks of pre-submittal prep. State law caps ministerial review at 60 days from a complete submittal. Total city + utility fees for a 700 sqft detached ADU typically run $13,000–$26,000.