The Los Angeles ADU permit process, explained step-by-step

California Government Code §65852.2 — the ADU statute — requires cities to approve compliant ADU applications ministerially, meaning over-the-counter, with no discretionary review and no public hearing. HCD's statewide ADU memo summarizes the obligation cities are under HCD statewide ADU technical assistance memo. The City of LA codified this in LAMC §12.22 A.33 LAMC §12.22 A.33 ADU code and built the ePlanLA portal around it.

Ministerial review means the planner can only check whether your project meets the objective standards in the code. They cannot weigh aesthetics, neighborhood character, or shadow impact. That's the point — and it's what makes LA's ADU pipeline as fast as it is.

Before you submit, you need an existing-conditions survey, soils info if your lot is in a hillside or liquefaction zone, a clear scope, and a complete plan set including a Title 24 energy compliance package. Symbium's free LA-specific zoning lookup is a useful first sanity check on whether your lot is even eligible Symbium LA zoning lookup, and Maxable's permit-status tracker is reliable for pulling neighborhood comparables Maxable ADU resource.

If your property is in an HPOZ (Historic Preservation Overlay Zone), the Office of Historic Resources reviews exterior changes — and this is the one place the ministerial clock can be slowed by design review LA HPOZ overview. Plan for 4–8 extra weeks if your lot is HPOZ.

Submittal is electronic through LADBS's ePlanLA portal LADBS ePlanLA portal. The first complete submittal triggers the statutory 60-day clock. LADBS routes the package to plan check (structural, zoning, energy) and to outside agencies in parallel — Bureau of Engineering, LA Sanitation, LADWP, and (if applicable) Fire.

Corrections come back as a 'comment letter.' This is normal, not a failure — even clean submittals from experienced design teams typically get one round of comments. A second round is common; a third is a sign something structural is off in the design.

Once plan check is cleared and fees are paid, LADBS issues the building permit and any subordinate permits — electrical, plumbing, mechanical, grading. School facility fees are paid separately to LAUSD before the building permit will release. The full LADBS fee schedule is published LADBS fee schedule and can be pre-calculated to within a few hundred dollars.

If your project requires a sewer-capacity charge or a new water meter, those get processed by LA Sanitation and LADWP respectively, and they have their own queues. Build them into your schedule.

Five inspections drive the schedule: foundation pre-pour, rough framing, MEP rough-in, insulation, and final. LADBS publishes the inspection request system and typical wait times LADBS inspection services. Booking an inspection is fast in LA compared to surrounding jurisdictions — usually next-day to two-day — but the inspector's first visit will sometimes 'green-tag with corrections,' meaning you can keep moving while addressing the punch list. A red tag stops work.

The Terner Center's California permit-streamlining work explains why LA's queue moves faster than most CA cities Terner Center ADU streamlining research, and the LA Times has covered LADBS performance trends LA Times — LADBS coverage.