Area profile

ADU permits in Hills & Canyons

Typical timeline

LADBS: 12–18 weeks because of slope, geotech, and hillside ordinance.

What changes about the permit here

Hill parcels add the Baseline Hillside Ordinance, geotech, and (along the ridgeline) the Mulholland Scenic Parkway Specific Plan to every permit package. The ADU itself is still ministerial, but plan-check takes longer because the structural, grading, and haul-route sheets are heavier than a flat-lot project.

BHO caps height to ~33 ft and limits grading cuts based on lot slope.
Soils / geotech report required on any slope >10%.
Hillside Construction Regulation permits gate haul-route hours and truck size.
Beverly Hills + Bel-Air HOA / R1 design review runs parallel to building permit.

On-the-ground notes

Baseline Hillside Ordinance caps height, grading cuts, and building footprint based on slope.
Mulholland Scenic Parkway Specific Plan applies along the spine — separate Director's review.
Beverly Hills parcels run their own R1 design review; Bel-Air HOAs review separately.

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Reference

Hills & Canyons permit terms and field guides

Glossary terms

BHO (Baseline Hillside Ordinance)
City of LA rules governing residential construction on hillside lots — height, grading, haul routes.
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.
HPOZ (Historic Preservation Overlay Zone)
City of LA designation that imposes design review on alterations within a historic neighborhood.

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.
LADBS ePlan: a builder's walkthrough of the LA permit portal
LADBS ePlan is the City of LA's mandatory electronic portal for residential plan check. All single-family and two-family permits since 2022 must be filed here. Typical workflow: register a project, upload PDF drawings, pay plan-check deposit, receive corrections in 2–4 weeks, resubmit through 2–3 cycles, pay final fees, download the issued permit.