The short answer: Often, yes. California’s building code plans for remodeling in buildings that stay in use, as long as exits and accessible routes stay usable the whole time, fire protection stays working or is covered by a fire watch, and the work area is sealed off from customers and staff. Whether it makes sense for your business depends on the scope, how much of the space you can give up at once, and whether the noisiest or messiest work can move to off-hours. Restaurants have one more gatekeeper: the health department.
One shop owner on the PMQ Think Tank forum asked the question most business owners ask before a remodel: “is it best to just shut down for a week or two?” One reply said close and “get it done without any hassles.” Another described a remodel done overnight so the doors never closed: “Yes it did cost extra for the labor to be done at night, but you were able to not close and have regular hours.”
Both can be right. Here’s what the code requires, what usually decides it, and how to plan so you lose as little business as possible.
Is it legal to stay open while construction happens in my space?
Generally, yes, but the work still needs permits, and the building has to stay safe for the people inside.
The core rule is short. Section 3310.2 of the 2025 California Building Code (effective January 1, 2026) says: “Means of egress and required accessible means of egress shall be maintained at all times during construction, demolition, remodeling or alterations and additions to any building.” The California Existing Building Code repeats the same idea for work in existing buildings. An exit can be taken out of service only where “approved temporary means of egress systems and facilities are provided.”
In plain terms, customers and employees must always have a clear way out, including a route that works for someone using a wheelchair. If that route is part of the work, the plan needs an approved alternate.
The California Fire Code adds a housekeeping rule in Section 3310.1: combustible construction materials for work in an occupied building “shall not be stored in exits, enclosures for stairways and ramps, or exit access corridors,” with narrow exceptions while workers are actively using them. That means no piles of drywall or lumber in the hallway your customers use.
Whether a specific project can stay open depends on your plans, your building, and what local building and fire officials approve.
What decides whether you can stay open?
Every project is different, but these factors usually tip the decision.
| Factor | Staying open is easier when… | Closing may make sense when… |
|---|---|---|
| Scope | Work is limited to one area (a restroom, a back office, new flooring in one zone) | The whole floor plan, ceiling, or kitchen line is being rebuilt |
| Space | You can give up part of the space and still operate | Every square foot is needed to serve customers |
| Exits and accessible routes | The work doesn’t touch your main entry, exit path, or accessible restroom | Those are part of the work and no workable temporary route exists |
| Fire systems | Sprinklers and alarms stay in service, or shutdowns are short | Long shutdowns would mean an extended fire watch |
| Utilities | Water, power, and gas outages can be scheduled after hours | Main service upgrades need long shutdowns during business hours |
| Noise, dust, and odors | Loud and dusty work can shift to nights or closed days | Your business can’t operate around noise or fumes (a clinic, a quiet office, a restaurant dining room) |
| Health department | Not a food business, or the kitchen isn’t part of the work | The kitchen, food prep, or storage areas are being remodeled |
If most of your answers land in the right-hand column, a short, well-planned closure can cost less than a long, disrupted open-store remodel.
What happens if the sprinklers or fire alarm have to be shut off?
Many remodels touch the sprinkler or alarm system, even if only to move a head. When a required system is out of service, the California Fire Code (Section 901.7) says the fire department and fire code official “shall be notified immediately” and, where the fire code official requires it, “the building shall either be evacuated or an approved fire watch shall be provided” until the system is back in service.
A fire watch is a person whose “only duty” is to patrol and watch for fire. Your local fire department sets when one is required and how it is staffed, so ask early, and schedule shutdowns for closed hours when you can.
Will dust, asbestos, or fumes be a problem for customers?
They can be, and this is where good planning matters most.
Asbestos first. In the South Coast Air Quality Management District, which covers Orange County and most of Los Angeles County, Rule 1403 requires an asbestos survey before renovation that could disturb asbestos-containing materials. The district says only Cal/OSHA Certified Asbestos Consultants may perform building surveys and sign the reports. If asbestos is found and has to be removed, a Rule 1403 FAQ says notifications and fees are due 10 working days before work starts for removals over its thresholds. Build that survey into your schedule before demolition, especially in older buildings.
Then dust and noise. On open-store remodels, contractors commonly use rigid barriers, sealed plastic containment, and HEPA-filtered negative air machines that pull air out of the work zone. A Facilities Dive article on open-store convenience store remodels (August 2026) also cautions that barricades must not block exits, emergency signage, or ADA access. Ask any contractor you interview how they would handle dust, noise, and odors in your specific space.
Can I keep my restaurant open during a kitchen remodel?
Sometimes, but restaurants need sign-off from more than one agency.
For food facilities under the Los Angeles County Department of Public Health, the county says a remodel of a permitted food facility requires a permit from the local building department, and plans must be approved by Environmental Health Plan Check before construction starts. The county also says a final inspection and a health permit are required “before utilizing any remodeled areas.” Its construction requirements page doesn’t say whether the rest of the restaurant may keep operating during the work, so confirm that with Plan Check before you count on it. Long Beach, Pasadena, and Vernon have their own city health departments, so the rules there come from the city.
If you’re planning a bigger restaurant project, our guide to how long a commercial tenant improvement takes walks through plan check and health review timelines that also shape a remodel schedule.
Can the work happen at night or on weekends?
Sometimes, but cities limit construction hours, and the limits differ.
| City | Standard construction hours | Source |
|---|---|---|
| Los Angeles | Monday to Friday 7 a.m. to 9 p.m.; Saturday 8 a.m. to 6 p.m.; no work on Sunday | LADBS |
| Long Beach | Weekdays 7 a.m. to 7 p.m.; Saturday 9 a.m. to 6 p.m. (outside the Harbor District) | Long Beach Building and Safety |
Long Beach says its Noise Control Officer may grant a permit for work outside those hours “if good cause is shown.” Other cities have their own rules, and your landlord or property manager may set stricter hours too, so check your lease.
After-hours work usually costs more, since crews and supervision work outside a normal day. Whether that trade makes sense comes down to what a closed day costs your business.
How do contractors keep a business running during construction?
The usual approach is phasing: splitting the job into stages so part of the space stays open while another part is built.
- Walk the space together. Identify what has to stay open (entry, register, restrooms, kitchen line) and what can close for a time.
- Draw the phases. Each phase should show the work zone, the barrier, the exit path, and the accessible route for that stage.
- Find the shutdowns. List every water, power, gas, sprinkler, and alarm outage, and schedule each one for closed hours.
- Plan inspections. An area can’t reopen until it passes, so inspection timing often sets the pace.
- Set the house rules. Agree on work hours, deliveries, material storage, parking, and who to call when something comes up.
- Tell your customers and staff. Signage and a heads-up about which door to use go a long way.
Phasing usually takes longer and can cost more than doing everything at once, because crews set up, protect, and clean more than once. Our breakdown of what a commercial build-out costs in Los Angeles and Orange County explains the cost drivers that phasing, after-hours work, and temporary protection add to.
What can I handle myself, and what needs my contractor?
Business owner: deciding which areas can close and when, staff schedules, customer notices, signage on which entrance to use, landlord approvals, and lease questions (ask your attorney or broker).
Contractor and design team: permits and phasing plans, temporary exits and barriers, fire watch and shutdown coordination with the fire department, the asbestos survey before demolition, dust containment, and inspection scheduling.
Frequently asked questions
Can a business stay open during a remodel in California? Often, yes. Exits and accessible routes must stay usable at all times, fire protection must stay working or be covered by a fire watch, and the work area must be separated from occupants.
Do I still need a permit if I stay open? Yes. Staying open doesn’t change what needs a permit. It often adds phasing and temporary safety details to the plans.
Can I keep a restaurant open during a kitchen remodel? Sometimes. In LA County, plans need Environmental Health approval before work starts, and remodeled areas can’t be used until final inspection. Confirm operating arrangements with the health department first.
Can construction happen overnight? Only if your city allows it. Los Angeles and Long Beach limit construction hours, and Long Beach can permit after-hours work with good cause. Night work usually costs more.
Does staying open cost more? Usually. Phasing, night work, and repeated setup and cleanup add cost and time. Compare that to what closing would cost you in lost sales.
Planning work in a space you can’t close?
The best time to decide whether to stay open is before the design is finished, while phases, shutdowns, and work hours can still be planned around your business.
De Sisto Construction, Inc. is a California licensed general contractor (CSLB #803545) serving greater Los Angeles and Orange County since 2001. We guide permitting, inspections, and code-compliance coordination, and we break the work down on a line-item estimate so you can see what phasing or after-hours work would add. Learn more about our commercial tenant improvement and restaurant renovation services.
Want to talk through whether your business can stay open during your project? Give us a call at 562-425-1050 or email us at info@desistogc.com (dcidirect.net)