The LADBS permitting process, explained

For most commercial build-outs in Los Angeles, the work has to be permitted through the Los Angeles Department of Building and Safety (LADBS). Done well, permitting runs quietly in the background. Done poorly, it's the single most common cause of delayed move-ins. Knowing how the process works helps you plan around it.

What requires a permit

Most tenant improvements involving structural changes, electrical, plumbing, mechanical work, or changes of occupancy require permits. Even seemingly cosmetic projects can trigger permit requirements once you touch building systems or alter the layout in ways that affect egress, accessibility, or fire safety.

Plan check — the step that takes time

Before a permit is issued, your plans go through plan check, where LADBS reviews them for code compliance. Commercial plan check can take weeks, and if reviewers return corrections, each round adds time. This is the part of the schedule most people underestimate.

The LADBS commercial permit process, step by step

1. Confirm jurisdiction and zoning. Verify the address is actually in the City of Los Angeles and check zoning and permitted use. The city's ZIMAS map is the starting point. A change of use can add Planning review and parking questions.
2. Prepare construction documents. A typical tenant improvement set includes architectural plans, electrical, mechanical, and plumbing drawings, accessibility details, and Title 24 energy compliance forms. Structural calculations are added when the work touches structure.
3. Choose the review path. Simple scopes may qualify for over-the-counter plan check. Most commercial build-outs go to regular plan check, and LADBS offers expedited review for an added fee when schedule matters.
4. Submit electronically. Plans are submitted through LADBS's online system, and the review is assigned to plan checkers by discipline.
5. Clear other departments. Depending on scope, the permit may need clearances from the Fire Department, Planning, Sanitation, or Public Works, and food-service projects need LA County Environmental Health approval. These run in parallel and are a common source of delay.
6. Respond to corrections. Plan check comments come back as a correction list. Quick, complete responses keep each round short.
7. Permit issuance. Once all reviews and clearances are signed off and fees are paid, the permit is issued and work can begin.
8. Inspections. The inspector signs off the job card at each stage, typically rough framing and MEP, insulation, drywall, and final. Trade permits are inspected on the same job.
9. Final and occupancy. Final inspection closes the permit. If the use or occupancy changed, a Certificate of Occupancy is issued before the space can open.

Accessibility and path of travel

When an existing commercial space is altered, the California Building Code generally requires upgrades to the accessible path of travel serving the area, such as the entrance, restrooms, and route from parking or the sidewalk. Up to 20 percent of the adjusted construction cost may need to go toward these items when full compliance is not feasible. Identifying path-of-travel issues before design is finished is one of the best ways to avoid surprise corrections.

Is my space even under LADBS?

A "Los Angeles" mailing address does not guarantee City of Los Angeles jurisdiction. Santa Monica, Culver City, Beverly Hills, and West Hollywood run their own building departments, and Marina del Rey is unincorporated LA County, permitted through LA County Building & Safety. See our pages on Santa Monica tenant improvements and Marina del Rey tenant improvements for how those differ.

How to keep permitting from delaying you

The fix is to plan for permitting from day one rather than treating it as an afterthought. That means complete, code-compliant drawings submitted early, anticipating likely correction items, and sequencing the rest of the project so site work can progress where possible while approvals are pending.

Occupied buildings and phasing

In active buildings, permitting often intersects with building-management requirements and tenant coordination. Aligning the permit timeline with those constraints early prevents conflicts later.

How we handle it

ASEP manages LADBS permitting and code compliance end to end. Because we know plan check can take time, we build it into the schedule from the start — so approvals don't become the reason your project slips.

When does a commercial tenant improvement need a permit?

Most commercial tenant improvements in Los Angeles require a building permit — particularly any work that touches structure, changes the floor plan, or modifies electrical, mechanical, or plumbing systems. Cosmetic work like painting or flooring may not, but the moment you move a wall, add a restroom, alter egress, or change the use of a space, permits come into play. When a space changes occupancy classification — say, converting office to restaurant — the requirements expand significantly. When in doubt, a contractor or the building department can confirm before work begins; proceeding without a required permit risks stop-work orders and costly corrections.

Types of permits a commercial build-out may require

Beyond the primary building permit, a commercial project frequently needs separate electrical, mechanical, and plumbing permits, and sometimes fire-department review for sprinklers, alarms, and egress. Signage typically carries its own permit. Restaurants and food-service buildouts add health-department plan check and grease-interceptor requirements. Coordinating these parallel tracks so they don't bottleneck each other is a core part of managing a build-out schedule.

How to avoid common permitting delays

Most plan-check delays trace back to incomplete drawings, unresolved accessibility (ADA) or Title 24 energy-compliance issues, or corrections that bounce between the applicant and the department. Submitting complete, code-compliant construction documents the first time — and responding to plan-check comments quickly — is the single biggest lever on approval speed. Building permitting time into the project schedule from day one, rather than treating it as a formality, keeps approvals from becoming the reason a project slips.

Working with LADBS and Westside jurisdictions

Not every Westside project falls under the City of Los Angeles. Santa Monica, Culver City, Beverly Hills, and West Hollywood each run their own building departments with their own submittal processes and local amendments. A contractor familiar with the specific jurisdiction your space sits in can route the permit correctly the first time and set realistic expectations for that department's timeline.

LADBS permitting FAQ

How long does LADBS plan check take for a tenant improvement?

It varies with scope and the department's workload. Simple projects may clear over-the-counter review, while most commercial build-outs go through regular plan check that takes weeks, plus time for each round of corrections. Expedited plan check is available for an added fee.

Can construction start before the permit is issued?

Permitted work should not begin until the permit is issued. The wait is best used to finalize selections, order long-lead materials, and line up trades so construction starts at full speed.

Does interior demolition need a permit in Los Angeles?

Interior demolition is usually covered under the building permit for the tenant improvement. Demolition that touches structure, fire-rated assemblies, or building systems should not begin before the permit is in place.

Who pulls the permit, the tenant or the contractor?

Either can, but on most commercial tenant improvements the licensed general contractor manages the submittal, corrections, and inspections on the owner's or tenant's behalf.