Ghost kitchens, cloud kitchens, dark kitchens, virtual restaurants, whatever you call them, they are commercial food preparation facilities without a dining room. They share one characteristic that complicates FOG compliance: multiple operators, one grease trap. Understanding who is responsible for grease trap maintenance in a shared commercial kitchen is not always obvious, and getting it wrong can result in fines, service shutdowns, or surprise liability when the health department shows up. If you operate out of a shared kitchen and need to find a licensed grease trap service provider, search at greasetraplocator.com.
What Is a Ghost Kitchen and Why Do FOG Rules Apply?
A ghost kitchen is a commercial kitchen rented by one or more operators to prepare food for delivery only, no public-facing dining room. The facility may host a single operator running multiple virtual restaurant brands, or dozens of independent operators sharing common equipment and space.
From a municipal FOG compliance standpoint, a ghost kitchen is a food service establishment. The same ordinances that require a McDonald's to maintain a grease trap apply to a 400-square-foot delivery kitchen running six delivery apps. The fact that there are no dining tables does not change your FOG obligations.
FOG (fats, oils, and grease) from cooking must be intercepted before entering the municipal sewer system. The legal instrument is a grease trap or grease interceptor installed on the facility's drain line. Every jurisdiction with a FOG program requires food service operators to:
- Install an appropriately sized trap
- Have it serviced by a licensed hauler on a regular schedule
- Keep service records for inspection
Who Is Responsible: Facility Operator or Tenant?
This is the central question for shared kitchens, and the answer varies depending on how the lease or rental agreement is structured.
Scenario 1: The facility operates a single shared grease trap
Many ghost kitchen facilities install one large gravity grease interceptor to serve the entire building. In this model, the facility owner or operator is responsible for maintaining the trap, scheduling service, and keeping records. Individual tenants may still have secondary compliance obligations depending on their jurisdiction.
Scenario 2: Each tenant has a dedicated interceptor
Some multi-tenant facilities plumb individual grease interceptors to each kitchen pod. In this model, each operator is individually responsible for their own unit. This is less common because it requires significantly more plumbing infrastructure.
Scenario 3: Ambiguous responsibility in the lease
This is the danger zone. If your lease says nothing explicit about grease trap responsibility, you could be held liable for a violation even if you assumed the facility handled it.
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?
- Who holds the FOG permit or registration with the local pretreatment program?
- 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. Verbal assurances do not hold up when the FOG inspector issues a notice of violation.
FOG Compliance in Ghost Kitchen Leases: What to Look For
Well-structured ghost kitchen leases typically address FOG in one of three ways:
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 is the cleanest 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 creates collective-action problems, tenants in adjacent pods may not coordinate, resulting in missed service intervals and violations.
If your facility uses the third model, push for a formal service schedule in writing with consequences for tenants who miss their turn.
Sizing Considerations for Shared Kitchens
A single grease interceptor serving a 20-pod ghost kitchen operates very differently from one serving a single restaurant. The cumulative FOG load from multiple operators running fryers and woks simultaneously can fill an interceptor much faster than a standard restaurant.
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 pod running a fried chicken concept produces far more grease than one running a salad brand
- Operating hours: Ghost kitchens often run 16 to 20 hours a day, compared to 12 to 14 for a traditional restaurant
- Kitchen turnover: When operators change frequently, institutional knowledge about service intervals is lost
Most well-run ghost kitchen facilities service their interceptors more frequently than a comparable single-tenant restaurant. Monthly service is common in high-volume facilities; quarterly may be adequate for lighter-use shared kitchens.
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 licensed commercial kitchen where caterers, food trucks, and cottage food operators rent time to prepare food. The key difference from a ghost kitchen is that the commissary model typically involves intermittent, shared use rather than dedicated tenant pods.
FOG compliance in a commissary follows the same logic:
- The commissary facility must have an appropriately sized grease trap
- The facility operator typically holds the FOG permit
- Renters (caterers, food truck operators) may still be inspected by the health department on their own food handler's permit
If you operate a food truck and use a commissary kitchen as your base, you are relying on the commissary's grease trap for your FOG compliance. Verify before you sign a commissary agreement that:
- The facility has a valid, current grease trap permit
- The trap has been serviced within the required interval
- You can obtain a copy of the service manifest if asked by a health inspector
Some municipalities require food truck operators to maintain their own FOG program documentation even when using a commissary, check your local health department requirements.
State and City-Specific Considerations
FOG regulations are primarily local. Municipal pretreatment programs vary significantly. Below are examples of how major markets handle shared-kitchen FOG:
New York City: The NYC Department of Environmental Protection's grease interceptor program requires all food service establishments, including delivery-only kitchens, to install and maintain a certified grease interceptor. The facility operator holds the permit; individual tenants may be cited for violations at their station.
Los Angeles: The LA Bureau of Sanitation FOG Control Program requires food service establishments to install grease interceptors sized per LA's standard. Ghost kitchen facilities must register separately from tenants, and each operator may be required to maintain their own Best Management Practices (BMP) plan.
Chicago: The MWRD (Metropolitan Water Reclamation District) requires pretreatment compliance from all significant industrial users, which includes large ghost kitchen operations. Multi-tenant facilities may need a master FOG permit.
Always verify requirements with your local wastewater utility. FOG programs are administered at the municipal level and 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. Most ghost kitchen facilities arrange for used cooking oil (UCO) collection separately from grease trap service.
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 operate on a food handler's permit and are inspected individually, you may need to produce FOG documentation.
Grease Trap Compliance for Virtual Restaurants in Traditional Restaurant Buildings
A growing number of traditional restaurants are running ghost kitchen operations from their existing facilities, cooking for delivery platforms using their existing kitchen, grease trap, and staff.
If this describes your situation, your existing grease trap compliance obligations do not change. If the additional delivery volume significantly increases your cooking hours or FOG output, your current service interval may no longer be adequate. Check the trap more frequently during the ramp-up period and adjust your service schedule accordingly.
Frequently Asked Questions
Does a ghost kitchen need a grease trap?
Yes. Ghost kitchens are commercial food service establishments and are subject to the same FOG ordinances as any other restaurant. The lack of a dining room does not reduce your obligation to intercept FOG before it enters the municipal sewer.
Who is responsible for grease trap maintenance in a shared kitchen?
It depends on the lease. In most cases, the facility operator holds the FOG permit and manages grease trap service. However, individual tenants may have separate compliance obligations. Always confirm responsibility in writing before signing a shared kitchen lease.
How often does a ghost kitchen's grease trap need to be serviced?
More often than a comparable single-tenant restaurant. A large multi-pod ghost kitchen facility running 20-plus operators simultaneously may need monthly service. A small shared commissary with intermittent use may be adequately served quarterly. The 25% rule applies: service when the trap is 25% full of grease and solids.
What records do I need to keep as a ghost kitchen tenant?
At minimum, keep copies of the facility's grease trap service manifests and your own BMP plan (if required by your jurisdiction). Some municipalities require each food service establishment, including individual tenants in a shared kitchen, to maintain their own FOG compliance documentation.
Can a food truck operator rely on a commissary kitchen's grease trap?
For FOG that goes down the commissary's drains, yes, the commissary's trap handles it. However, many municipalities require food trucks to have their own FOG plan and may inspect the commissary facility as part of a food truck compliance check. Verify local requirements.
What should I look for in a ghost kitchen lease regarding FOG?
Look for explicit language stating who holds the 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 FOG responsibility ambiguous.
Conclusion
Ghost kitchens and shared commissary spaces have the same FOG compliance requirements as any other food service operation, the shared nature of the space just makes the responsibility question more complicated. Understand who holds the FOG permit before you sign a lease, keep your own records, and follow good kitchen practices to minimize grease load. When you need to verify that a shared kitchen facility has a current, compliant grease trap program, GreaseTrapLocator can help you find certified grease trap service providers in your area.
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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