The short answer: Often, yes. But in California, turning a store into a restaurant is usually treated as a “change of use” (and often a “change of occupancy”), not a simple remodel. Planning, building, fire, and health reviewers look at the space as a new kind of business, which can add a kitchen exhaust hood, a grease interceptor, more restrooms, accessibility upgrades, and sometimes sprinklers or parking. The best time to learn what applies is before you sign the lease.
Picture it. You walk a vacant boutique on a busy corner. The rent is fair, the windows are huge, and you can already see tables lined up along the glass.
Here’s the catch. That space was built to sell clothes. A restaurant changes how many people are inside, what sits on the roof, what goes down the drain, and how much power and gas the building needs. Many first-time owners budget carefully for chairs and finishes, then learn the expensive part is hidden above the ceiling and under the slab.
Let’s walk through what “change of use” means, who signs off, where the money goes, and what to check before you commit.
What does “change of use” actually mean?
Two separate questions hide inside that phrase, and different people answer them.
1. Zoning: is a restaurant allowed at this address? That’s the city’s planning department. Depending on the zone, a restaurant may be allowed by right, allowed only with a discretionary approval such as a conditional use permit, or not allowed at all. Planning may also look at parking, hours, outdoor dining, and alcohol.
2. Building code: what “occupancy” is the space becoming? The California Building Code sorts buildings by use. A store is generally a mercantile occupancy (Group M). A restaurant is generally an assembly occupancy (Group A-2).
There’s an important exception. Under California Building Code Section 303.1.1, a building or tenant space used for assembly with an occupant load under 50 people is classified as Group B, not Group A. That’s why a small counter-service cafe can be treated very differently from a 90-seat dining room. Your designer calculates occupant load from the floor plan using code formulas, not from the seat count you hope for.
When the occupancy classification changes, the 2025 California Existing Building Code (in effect since January 1, 2026) requires the building official’s approval and a new certificate of occupancy. Where the new use is rated higher hazard than the old one, parts of the building may have to meet current code for the new use.
In plain terms, the city isn’t just reviewing your new tile. It’s asking whether the building can safely host a restaurant.
Who has to sign off on a retail-to-restaurant conversion?
A restaurant usually goes through more reviewers than a typical retail build-out. Requirements vary by city, but here’s the general lineup.
| Reviewer | What they look at | Why it matters |
|---|---|---|
| Planning / zoning | Whether restaurant use is allowed, parking, hours, outdoor seating, alcohol | Can stop the project before design starts |
| Building and safety | Occupancy, exits, restrooms, structure, energy, accessibility | Drives most of the construction scope |
| Fire department | Hood fire suppression, alarms, sprinklers, exiting | Can add systems the store never needed |
| Health department | Kitchen layout, sinks, finishes, ventilation, equipment | Plans must be approved before construction starts |
| Sewer / public works | Grease interceptor and waste lines | Can mean cutting the slab or working outside your suite |
| California ABC (if serving alcohol) | Liquor license type and premises | No license where the use conflicts with local zoning |
The health step surprises people. California law requires food facility plans to be approved by the local health agency before construction or remodeling begins. In Los Angeles County’s Environmental Health plan check program, plans include the floor plan, ventilation details, a finish schedule, and your proposed menu, and standard review takes up to 20 working days after payment. Some cities, including Long Beach, run their own health plan check, so confirm which agency covers your address.
For alcohol, the California Department of Alcoholic Beverage Control issues different license types. A Type 41 covers beer and wine at a bona fide eating place; a Type 47 adds distilled spirits. State law bars ABC from issuing a retail license where the use would violate local zoning, so planning comes first.
Where does the money go when you convert a store?
Mostly to the back of the house. In a September 2026 Restaurant Dive article, one restaurant designer estimated that building from scratch can cost 1.5 to 2 times more than converting an existing restaurant, because most of the cost “gets attributed to the back of the house and all the systems behind it.” That’s one professional’s estimate, not a rule, but it matches what the reviews above point to.
The items that usually move a retail-to-restaurant budget most:
- Exhaust hood and make-up air. Cooking that produces grease or smoke needs a commercial hood, ductwork through the roof, an exhaust fan, and replacement air. The roof may need engineering review for the new equipment.
- Hood fire suppression, reviewed by the fire department.
- Grease interceptor. If required, it may go in the ground, sometimes outside your suite, which can mean cutting concrete and coordinating with the landlord.
- Plumbing. Floor sinks, hand sinks, a three-compartment sink, and possibly more restrooms, since fixture counts are tied to occupancy and occupant load.
- Electrical and gas capacity. Shops built for lights and registers may need a larger service or a new gas line, and utility work has its own lead times.
- Accessibility. Altering the space can require path-of-travel upgrades to the entrance, route, and restrooms. California caps that spending at 20% of construction cost only for projects at or below the annual valuation threshold, which the Division of the State Architect set at $209,208 for 2026. Restaurant conversions often land above it.
- Sprinklers and alarms, depending on occupancy, size, and occupant load.
You’ll notice there’s no cost-per-square-foot number here. That’s on purpose. Two spaces of the same size can differ widely depending on the roof, slab, utilities, and what the last tenant left behind. A line-item estimate from a walk-through beats any average. Our page on restaurant, retail, and other commercial build-outs shows the kinds of projects involved.
Isn’t a former restaurant space always cheaper?
Not always. A “second-generation” space with a hood, interceptor, and restaurant restrooms can save a lot, but savings shrink when your concept differs from the last one, or when equipment and HVAC are near the end of their life.
Before counting on reuse, ask: Why did the last restaurant close? Were its improvements permitted and finaled? Has a hood service company inspected the exhaust and suppression? Will the landlord remove equipment you don’t want?
What should I check before I sign the lease?
Bring this list to your broker, landlord, and contractor.
- Confirm with planning that restaurant use is allowed, and what alcohol, late hours, or outdoor seating need
- Ask whether the change of use triggers more parking
- Get an occupant load estimate for your target seat count (under 50 or not changes a lot)
- Check the roof for a hood exhaust path and equipment space, and whether the landlord allows roof penetrations
- Find out if there’s a grease interceptor, or where a new one could go
- Get the electrical service size, gas availability, and water and sewer details
- Count existing restrooms and note whether they’re accessible
- Pull the permit history for the suite
- Read the work letter: who pays for what, how the TI allowance works, and what happens to rent if permits run long
- Get a contractor walk-through and rough line-item budget before the lease is final
When can I handle this myself, and when do I need a pro?
Much of the early homework is yours. You can visit the planning counter, pull permit records, ask the landlord the questions above, and read your health department’s plan check guidelines. Finish your menu and equipment list early, too, because the menu drives the hood, the kitchen layout, and the health review.
The rest needs licensed professionals. A designer or architect prepares plans and calculates occupant load. Engineers may be needed for mechanical, plumbing, or structural work. A licensed commercial general contractor prices the scope and builds it. Our commercial tenant improvement team handles restaurant renovations and build-outs, and as a Signal Hill general contractor in business since 2001, DCI guides permitting, inspections, and code-compliance coordination with line-item costing. Bringing a contractor in before you sign is one of the cheapest ways to avoid an expensive surprise.
FAQ
Is turning a store into a restaurant a change of occupancy? Often, yes. A store is generally Group M and a restaurant Group A-2, while an assembly space under 50 occupants is Group B. The building department decides based on your plans.
Do I need health department approval to build a restaurant in California? Yes. Food facility plans must be approved by the local health agency before construction starts, and you need a final inspection and health permit before opening.
Do I need a grease interceptor? It depends. Under the California Plumbing Code, the local authority decides when pretreatment is required, so ask your city or sewer agency early.
Can I serve beer and wine in a converted retail space? Possibly. You need an ABC license, such as a Type 41, and ABC can’t issue one where the use conflicts with local zoning. Many cities also require their own approval.
How long does a retail-to-restaurant conversion take? It varies. Planning, building, fire, and health reviews can run on separate tracks. In Los Angeles County, health plan review alone takes up to 20 working days after payment.
Is a former restaurant space always cheaper to build out? Not always. Existing hoods and interceptors help, but savings shrink when your concept differs or the equipment is worn out or unpermitted.
Thinking about a space? Let’s look before you sign
If you’ve found a store you think could become your restaurant, the most valuable next step is a walk-through before the lease is final. We can look at the roof, slab, utilities, and restrooms, flag what a change of use is likely to trigger, and give you a line-item picture of the back-of-house work so you can negotiate with real numbers.
Give us a call at 562-425-1050 or email us at info@desistogc.com (dcidirect.net)
One Response