Delivery-only brands can operate from dedicated kitchens or existing restaurants. In shared kitchens, multiple operators may use one grease trap, which can complicate FOG compliance. Who is responsible for grease trap maintenance in a shared commercial kitchen is not always obvious, and getting it wrong can lead to enforcement by the local sewer or health authority. If you operate out of a shared kitchen, you can compare local grease trap service companies at greasetraplocator.com.
What Is a Ghost Kitchen and Why Do FOG Rules Apply?
A ghost kitchen prepares food for delivery without an on-site dining room. The facility may host a single operator running several virtual restaurant brands, or many independent operators sharing equipment and space.
A ghost kitchen cooks food commercially, so local grease rules for food service businesses are likely to apply to it. Not having a dining room does not by itself exempt you. Check how your local program defines a food service establishment.
In the United States, federal pretreatment rules prohibit discharges that cause pass through or interference, including solid or viscous pollutants in amounts that obstruct flow and result in interference. The detailed grease rules are mostly local, and local programs can require a grease trap or interceptor on the kitchen's drain line. Depending on the local program, requirements can include:
- An approved, properly sized trap or interceptor
- Regular cleaning, sometimes by a permitted or registered hauler
- Service records kept for inspection
Who Is Responsible in a Shared Kitchen?
This is the central question for shared kitchens. The answer depends on your lease and on your local rules; check both, and get legal advice if it is unclear.
Scenario 1: The facility operates a single shared grease trap
Some shared kitchens have one large grease interceptor serving the whole building. Who must maintain it, schedule service and keep records depends on your lease and the local authority. Tenants may have their own obligations too, so check your lease and the local authority, and get legal advice if it is unclear.
Scenario 2: Each tenant has a dedicated interceptor
Some multi-tenant facilities have a separate grease interceptor for each kitchen unit. Even then, check your lease and the local authority to confirm who is responsible for each one.
Scenario 3: The lease is unclear
This is the danger zone. If your lease says nothing clear about grease trap responsibility, it may be unclear who answers for a violation. Check your lease and the local authority, and get legal advice.
What to do: Before signing a lease in any shared commercial kitchen, ask in writing:
- Is there a grease trap on the property? What type? What is its capacity?
- Does the local program require a FOG permit or registration, and who holds it?
- Who schedules and pays for grease trap service?
- Who keeps the service records?
- What is the procedure if the trap fills early due to one operator's high-grease cooking?
Get the answers in the lease or in a written addendum, so everyone knows who is responsible if an inspector finds a problem.
FOG Compliance in Ghost Kitchen Leases: What to Look For
Shared kitchen agreements can handle grease trap service in different ways, for example:
Included in facility services: The lease includes grease trap maintenance as part of a base facility fee. The facility schedules service and provides all tenants with copies of service records on request. This can be the simplest arrangement for tenants.
Pro-rata cost sharing: Grease trap service costs are divided among tenants based on square footage, cooking volume, or some other metric. Tenants are billed monthly or quarterly. The facility still coordinates service.
Tenant responsibility: Each tenant is responsible for scheduling and paying for service on a shared trap. This can cause problems: tenants may not coordinate, and service can be missed.
If your facility uses the third model, push for a formal service schedule in writing with consequences for tenants who miss their turn.
Service Frequency in Shared Kitchens
A grease interceptor serving many kitchen units can fill faster than one serving a single restaurant, because several operators may be frying and cooking at the same time.
Factors that affect service frequency in shared kitchens:
- Number of active operators: More operators cooking simultaneously means more FOG entering the system
- Cooking method mix: A unit running a fried chicken concept is likely to produce more grease than one running a salad brand
- Operating hours: Longer cooking hours mean more grease entering the system
- Kitchen turnover: When operators change frequently, institutional knowledge about service intervals is lost
How often to service depends on your local rule and how fast the trap fills. Busy shared kitchens may need more frequent service than a single restaurant.
See our guide on grease trap service frequency for factors that affect your optimal service interval.
Commissary Kitchens: Similar Rules, Different Structure
A commissary kitchen is a commercial kitchen where caterers, food trucks and other small food businesses rent time to prepare food. A commissary may be shared on a booking basis rather than split into dedicated units.
FOG compliance in a commissary follows the same logic:
- The commissary may need a properly sized grease trap under local rules
- Who holds any FOG permit depends on the local authority and your agreement; check both
- Renters (caterers, food truck operators) may still be inspected under their own health permit or licence
If you run a food truck from a commissary, do not assume every commissary drain connects to a grease trap; ask the facility to confirm which fixtures are connected. Check what your own obligations are. Before you sign a commissary agreement, check that:
- The facility has any grease trap permit or registration the local program requires
- The trap has been serviced within the required interval
- You can obtain a copy of the service manifest if asked by a health inspector
Check with your local health department and sewer authority whether you need your own grease records when using a commissary.
Local Rules Vary
FOG rules are mostly local, and local programs vary. In Canada, check the provincial or territorial and municipal rules that apply.
New York City: the Department of Environmental Protection requires commercial grease-generating businesses to correctly install, operate and maintain grease interceptors, cleaned as often as needed to stay within their rated capacity.
Always check the requirements with your local sewer authority, which may be a city, a regional district or a utility. Rules can vary even within the same state.
Best Management Practices for Ghost Kitchen Operators
Even if the facility handles grease trap service, individual operators have FOG-related responsibilities:
Dry wipe before washing: Remove solid food waste and grease from pans with a paper towel before putting them in the sink. This reduces FOG load entering the trap.
No grease down the drain: Fryer oil, spent cooking fat, and used butter go into a cooking oil collection container, not the sink. Used cooking oil collection can be a separate service from grease trap pumping; ask the facility how it is handled.
Report problems immediately: If you notice a slow floor drain or gurgling from a nearby sink, report it to facility management immediately. A slow drain in one pod can indicate an interceptor approaching capacity that affects everyone.
Keep your own records: Even if the facility provides service records, keep a copy in your own files. If you are inspected under your own health permit or licence, you may be asked for grease records.
Grease Trap Compliance for Virtual Restaurants in Traditional Restaurant Buildings
Some traditional restaurants also run delivery-only brands from their existing kitchens, using the same grease trap and staff.
If this describes your situation, your existing grease trap rules still apply. If the additional delivery volume significantly increases your cooking hours or FOG output, your current service interval may no longer be adequate. Ask your service company to check the trap level more often while volume ramps up, and adjust your service schedule if needed.
Frequently Asked Questions
Does a ghost kitchen need a grease trap?
Very likely. A ghost kitchen cooks food commercially, so local grease rules for food service businesses are likely to apply. Not having a dining room does not by itself exempt you; check how your local program defines a food service establishment.
Who is responsible for grease trap maintenance in a shared kitchen?
It depends on your lease and your local rules. Tenants may have their own obligations even when the facility arranges service. Check your lease and the local authority, get legal advice if it is unclear, and confirm responsibility in writing before you sign.
How often does a ghost kitchen's grease trap need to be serviced?
It depends on your local rule and how fast the trap fills; busy shared kitchens may need more frequent service. Some programs set a fill limit: Seattle, for example, allows no more than 25% food/FOG buildup when manufacturer specs are not available. Check your local rule.
What records do I need to keep as a ghost kitchen tenant?
Keep copies of the facility's grease trap service records and any grease plan your local program requires. Ask the local authority whether each tenant must keep its own records.
Can a food truck operator rely on a commissary kitchen's grease trap?
Do not assume every commissary drain connects to a grease trap; ask the facility to confirm which fixtures are connected. You may still have your own obligations, so check with your local health department and sewer authority.
What should I look for in a ghost kitchen lease regarding FOG?
Look for clear language on who holds any FOG permit, who schedules and pays for grease trap service, how service records are shared with tenants, and what happens when a violation occurs. Avoid leases that leave this unclear, and get legal advice before signing.
Conclusion
Ghost kitchens and shared commissary spaces are likely to face the same local grease rules as other food businesses; the shared space just makes the responsibility question harder. Understand who holds any FOG permit before you sign a lease, keep your own records, and follow good kitchen practices to minimize grease load. When your shared kitchen needs grease trap service, you can compare local grease trap service companies on GreaseTrapLocator.
Author: Grease Trap Locator Editorial Team
The Grease Trap Locator editorial team covers FOG compliance, grease trap maintenance, and commercial kitchen regulations across the US and Canada. Our guides are written for restaurant owners, facility managers, and food service operators who need practical, accurate information without the fluff.
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