How long does it take to deep clean a restaurant? A professional crew needs 4 to 8 hours on the clock, and that assumes four people working an empty building. Measured as labor rather than wall clock, the same job is roughly 16 to 32 crew hours.
A cafe runs 8 to 14 crew hours. A large or badly neglected kitchen can pass 40 and gets split across two or more nights.
Routine visits after that first clean are much shorter, usually 1.5 to 6 crew hours depending on the size of the restaurant.
Those two numbers, hours on the clock and crew hours, are the whole answer, and mixing them up is why quotes that look wildly different are often describing the same job.
One thing moves the total further than square footage does, and it won’t appear anywhere on the quote you’re handed.
Crew hours and hours on the clock are not the same number
A crew hour is one cleaner working for one hour. Four cleaners working for four hours is sixteen crew hours, and so is two cleaners working for eight.
The work in a restaurant is measured in crew hours, because that’s what the job actually consumes. The number you care about is hours on the clock, because that’s what has to fit between your last employee leaving and your first one arriving.
Divide one by the other and you have your answer:
Hours on the clock = crew hours divided by crew size.
So a 24 crew hour deep clean is six hours with four people, eight hours with three, and twelve hours with two, which no restaurant’s overnight window can absorb. Adding people is how a cleaning company makes a big job fit a small window, and it’s the first thing to ask about when a quoted duration sounds impossible.
It also explains a common confusion. Two companies quote “about six hours” for the same kitchen. One is sending two cleaners and one is sending four. Those are not the same offer, and only one of them is finishing.
How long does it take to deep clean a restaurant, by size
These are first deep clean figures for a kitchen plus front of house in reasonable condition. A restaurant that hasn’t had a real clean in two years sits at the top of its band or above it.
| Restaurant | Crew hours (first deep clean) | 2 person crew | 3 person crew | 4 person crew |
|---|---|---|---|---|
| Cafe or coffee shop, under 1,500 sq ft | 8 to 14 | 4 to 7 hours | 3 to 5 hours | 2 to 4 hours |
| Fast casual or QSR, 1,500 to 2,500 sq ft | 12 to 20 | 6 to 10 hours | 4 to 7 hours | 3 to 5 hours |
| Full service, 2,500 to 4,000 sq ft | 16 to 30 | 8 to 15 hours | 5 to 10 hours | 4 to 8 hours |
| Large or high volume, 4,000 sq ft and up | 28 to 45 | two nights | 9 to 15 hours | 7 to 11 hours |
Read the table against your own window rather than in the abstract. If your building empties at 12:30 AM and your baker arrives at 5, you have four and a half hours, which means a full service restaurant needs three or four people rather than two. The overnight window and how to measure yours is the constraint every one of these numbers has to fit inside.
Anything in the bottom row is usually a two night job, and there’s nothing wrong with that. Published guidance on heavily built up commercial kitchens puts them at two to four days of work, and splitting a first clean across consecutive nights is normal, not a sign that something has gone wrong.
What actually decides the number
Condition. That’s the thing that moves the total further than square footage does, and it’s the one variable no quote lists, because it’s the thing an estimator is measuring on the walkthrough while asking about your hours.
The reason is chemical rather than effort. A degreaser doesn’t dissolve grease on contact. It has to sit on the surface and break the bond, usually five to fifteen minutes per application, and heavy buildup needs more than one pass. Rushing that dwell is the single most common mistake in commercial kitchen cleaning, because grease that hasn’t softened smears rather than lifts, which makes the surface worse and the job longer.
So a hood canopy with three years of carbon on it doesn’t take twenty percent longer than a clean one. It takes three applications instead of one, with dwell time between each, and that’s the difference between an hour and three.
Four things stretch the clock, in rough order of impact:
- Time since the last real clean. The dominant factor. A kitchen on a monthly schedule deep cleans in a fraction of the hours a neglected one needs.
- Cooking volume and method. Charbroiling and wok stations lay down grease at a rate fryers and griddles don’t come close to, and it lands on every surface in the room.
- Floor and grout condition. Quarry tile with sound grout scrubs fast. Grout that’s gone porous holds soil and needs multiple passes, and badly worn tile may need restoration that isn’t a cleaning job at all.
- Equipment density and access. A tight line with everything on casters moves fast. Equipment that’s fixed in place, or too heavy to pull, turns a ten minute task into a forty minute one.
Put numbers on it. Take the same 3,000 square foot full service restaurant twice.
The first one has been on a monthly deep clean schedule for two years. The cook line takes one degreaser application and a wipe, the hood canopy the same, the grout releases on the first scrub pass, and the whole building comes in around 18 crew hours. Four people, four and a half hours, one night, done before the baker arrives.
The second one hasn’t had a professional clean since it opened. The cook line needs three applications with dwell time between each, and the hood canopy needs the same. The grout has gone porous and takes two passes and a neutralizer, and the walk in floor has to be stripped rather than mopped.
The same building comes in at 34 crew hours. Four people, eight and a half hours, which doesn’t fit in anybody’s overnight window, so it becomes two nights.
Same square footage, same scope, nearly double the labor. That’s the variable that isn’t on your quote.
Two things people expect to matter mostly don’t. Your dining room cleans quickly per square foot compared with a kitchen, so its size moves the total far less than owners assume. And how many covers you did last night affects your closing crew’s work, not the deep clean crew’s.
Where the hours actually go
A useful way to sanity check a quote is to know roughly what each part of the night costs. These are typical crew hour figures for a full service restaurant on a first deep clean.
| Task | Crew hours |
|---|---|
| Teardown: strip the line, pull grates, drip trays, knobs, baskets | 1 to 2 |
| Cook line degrease: range, flat top, salamander, backsplash, hood interior surfaces | 4 to 8 |
| Fryers: drain, boil out, wipe the cabinet and surround | 1 to 3 |
| Cold storage: walk in shelving, gaskets, condenser housing, floor | 2 to 4 |
| Dish area: machine, three compartment sink, splash walls, floor behind | 1 to 2 |
| Prep surfaces, shelving, and the wall behind the equipment | 2 to 4 |
| Kitchen floor: degrease, scrub, grout, drains, rinse | 3 to 6 |
| Front of house: dining floor and edges, banquettes, bar, restrooms | 3 to 6 |
| Reassembly and the final wipe down | 1 to 2 |
One ratio worth carrying around: roughly two thirds of a restaurant deep clean’s hours land in the kitchen, and the kitchen is usually the smaller room. That’s why floor area alone is a weak predictor, and why a restaurant with a large dining room and a short cook line often comes in lower than its square footage suggests.
Add the low column and you get 18 crew hours. Add the high column and you get 37. That’s the honest spread for one full service restaurant, and it’s why nobody can quote you a duration over the phone.
Note what isn’t on that list. Certified hood and exhaust duct cleaning, grease trap pumping, and floor restoration are separate trades with their own schedules and their own certificates, and none of them is included in the hours above. If your quote covers them, the total will be considerably higher. What a deep clean actually costs breaks that split down properly.
Why part of the night looks like nothing is happening
If you ever walk in on a deep clean in progress, some of what you see will look like standing around. It usually isn’t.
Chemistry needs uninterrupted contact time to work, and a crew that applies degreaser and immediately starts scrubbing is doing the job twice. So a good crew works in a rotation: apply to the hood canopy, move to the fryers, come back when the canopy is ready, move to the range, come back again. What looks like idle time is the crew staging its applications so nothing waits on nothing.
That rotation is also why crew size has a ceiling. Past a certain point, adding people doesn’t compress the night, because the constraint stops being hands and starts being surfaces that are already wet and waiting. In most restaurant kitchens that ceiling is around four to six cleaners, which is another reason a very large first clean gets split across nights rather than solved with a bigger crew.
Why routine visits are so much shorter
After the first clean, a restaurant on a regular schedule drops to 1.5 to 2.5 crew hours a visit for a cafe and 2.5 to 4 for fast casual. Full service runs 4 to 6, and a large operation 6 to 9.
That isn’t a smaller scope. It’s the same building with a fraction of the soil on it.
The maintenance effect is real and it compounds: a system cleaned on schedule takes meaningfully less labor than a neglected one, because nothing has had time to bake on. Surfaces that get wiped weekly never reach the state that needs three degreaser passes, so the recurring visit stays short, which keeps the recurring price stable.
The practical version: the deep clean number above is a one time expense of hours. Let the schedule slip and you pay it again.
How to make the hours in a quote mean something
Three questions turn a vague duration into a number you can check.
- Ask how many people, and for how many hours each. Insist on both. “About six hours” is not an answer until you know the crew size, and the product of the two is the only figure worth comparing between companies.
- Ask whether that’s one night or several. A large or neglected restaurant may need two or three consecutive nights for the first clean, and a company that plans for it up front is being realistic rather than slow.
- Ask what’s included and what’s a separate trade. Confirm in writing whether hood ductwork, grease trap service and floor restoration are inside the hours or outside them.
Then compare the answer against your own window. If the crew hours divided by the crew size is longer than the gap between your last employee leaving and your first arriving, the job doesn’t fit and somebody needs to add people or add a night.
If you want a real number for your own restaurant rather than a band, that comes from a walkthrough. Excellence Janitorial Services will come and look at the building, count the hours honestly and tell you whether it fits in one night. Call (800) 851-0806 for a free estimate, and see what the first deep clean actually involves before you book it.
Frequently asked questions
How long does it take to deep clean a commercial kitchen?
For the kitchen alone, 4 to 8 hours on the clock with a professional crew, or roughly 12 to 24 crew hours of labor. Heavy grease buildup pushes it well past that, and published guidance puts badly neglected commercial kitchens at two to four days of work.
How many cleaners does it take to clean a restaurant?
Two to four for most restaurants, and the number is set by your window rather than by the building. Take the crew hours the job needs and divide by the hours you can give them. A full service restaurant needing 24 crew hours in a four hour window needs six people, which is usually the point where the job gets split across two nights instead.
Can a restaurant deep clean be done in one night?
Usually, for a cafe, a fast casual restaurant or a full service restaurant in reasonable condition with a crew of three or four. A large operation, or any kitchen that hasn’t had a real clean in a couple of years, is commonly a two night job.
How long does a routine restaurant cleaning visit take?
Between 1.5 and 2.5 crew hours for a cafe, 2.5 to 4 for fast casual, 4 to 6 for a full service restaurant and 6 to 9 for a large one. With a two person crew that’s roughly one to four and a half hours on the clock.
Why does the first deep clean take longer than the ones after it?
Because it’s removing accumulated soil rather than one day’s worth, and because the crew is learning your building. Grease that’s had months to bake on needs several degreaser applications with dwell time between them, where a maintained surface needs one.
Does hood cleaning add time to a deep clean?
Certified hood and exhaust duct cleaning is a separate trade with its own schedule and its own certificate, so it usually isn’t inside a janitorial deep clean’s hours at all. Wiping the accessible interior surfaces of the canopy is; cleaning the ductwork to bare metal is not.
How long should degreaser sit before it’s wiped?
Five to fifteen minutes per application on most commercial products, and heavy buildup needs more than one pass. Cutting that dwell short is the most common reason a deep clean has to be redone, because grease that hasn’t softened smears instead of lifting.
Do I need to close for a day to get a deep clean?
No. A first deep clean runs after close like any other visit, which is why its hours have to fit inside your overnight window. A job too large for one night gets split across consecutive nights rather than costing you a day of service.
How long does the floor take to dry?
Plan on about 30 minutes after the final rinse before anyone should be walking on it in work shoes, longer in a humid kitchen with no air movement. Crews often set a floor drying fan and leave it running, which is why floors go last and why the drying time has to come out of your overnight window, not out of the crew’s.