Solar Permit Requirements Los Angeles 2026: LADBS and All 88 Cities

Los Angeles is the largest and most complex solar permit market in California. LADBS processes more residential permits annually than most states' entire permit volume, and the additional 88 independent cities within LA County each add their own permitting layer. For solar contractors working the LA market, understanding the system is the difference between a 10-day permit approval and a 30-day delay spiral.

LADBS vs. the 88 cities: which authority handles your job?

LADBS (Los Angeles Department of Building and Safety) handles permits only for addresses within the City of Los Angeles proper. The City of LA covers 503 square miles, but Los Angeles County is much larger and contains 88 other incorporated cities — each with its own independent building department.

The most common and expensive mistake in the LA market: submitting a permit to LADBS for an address that's actually in Burbank, Glendale, Santa Monica, Long Beach, or any of the other 87 independent cities. The permit gets rejected or processed by the wrong authority, adding 1–2 weeks of delay.

What a complete LADBS solar permit submittal requires

• Permit application through ePlanning with C-46 or C-10 contractor license number and system size in kW DC
• Site plan showing roof layout, module placement, all required setbacks per California Fire Code, and north arrow
• Electrical single-line diagram from modules through inverter to utility meter — wire sizes, conduit types, breaker ratings, rapid shutdown system per NEC 2017
• Structural documentation confirming roof framing adequacy
• Equipment spec sheets for modules, inverter, and rapid shutdown device (all UL listed)
• Title 24 documentation if triggered by project scope

LADBS ePlanning: the electronic plan check process

LADBS offers electronic plan check (ePC) through its ePlanning portal. For most residential solar projects, ePC is the fastest path to approval. The ePlanning portal accepts digital submittals, issues corrections electronically, and tracks permit status in real time.

Key ePlanning operational notes: PDF submittals must meet LADBS's specific file naming and formatting requirements — non-compliant PDFs are rejected at upload. The correction response process goes entirely through the portal for ePC projects. Status changes appear in ePlanning, but LADBS does not always send proactive email notifications — active monitoring is required.

Over-the-counter (OTC) approval at LADBS

LADBS offers over-the-counter approval for qualifying simple residential solar projects. OTC approval can happen same-day or next-day rather than waiting in the standard plan check queue. Eligibility requirements for LADBS OTC solar approval:

• Residential single-family or duplex
• System within specified size limits
• Standard roof configuration without unusual structural conditions
• No battery storage included
• Equipment on LADBS approved list

OTC requires an in-person or virtual appointment at the appropriate LADBS district office. Not every project qualifies — verify eligibility before scheduling an OTC appointment.

LADBS permit timelines 2026

LADWP interconnection for LA City solar

The City of Los Angeles is served by LADWP (Los Angeles Department of Water and Power), not SCE. LADWP has its own NEM interconnection program with different requirements, application forms, and timelines than SCE's NEM program. Contractors who primarily work in SCE territory should familiarize themselves with LADWP's interconnection process before taking on City of LA solar projects. LADWP interconnection typically takes 4–10 weeks and runs independently of the LADBS permit.