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