How long does it take to clean an office?
One custodian can clean about 10,000 to 11,000 square feet in an 8-hour shift to a "spotless" corporate-suite standard, according to the U.S. Department of Education's facilities guide. That is about 45 minutes of labor per 1,000 sq ft at Level 1. Using Levels 1 and 2 as whole-office planning scenarios, a 5,000 sq ft office works out to roughly 2 to 4 person-hours. The real total depends on how much of the space is restrooms and kitchens, plus time to get in and lock up.
Where do these numbers come from?
The National Center for Education Statistics (NCES) publishes a facilities planning guide with five levels of cleaning and how much floor one custodian can clean at each level in 8 hours. The guide was written for schools, but its top level is described as the standard of "a hospital environment or corporate suite".
| NCES level | What it looks like | Sq ft one custodian cleans in 8 hours |
|---|---|---|
| Level 1 | "Spotless", as in a hospital or corporate suite | 10,000–11,000 |
| Level 2 | Generally used for restrooms, food-service and other high-attention areas | 18,000–20,000 |
| Level 3 | The norm for most schools, with no health issues | 28,000–31,000 |
| Level 4 | Rooms cleaned every other day, carpets vacuumed every third day | 45,000–50,000 |
NCES calls these estimates and says the real number depends on flooring, wall coverings and windows. APPA, the association of educational facilities managers, publishes benchmarks in the same direction: fewer square feet per custodian at higher appearance levels. Its office-with-carpet figures are 12,300 sq ft per custodian at Level 1 and 24,500 at Level 2, although that article doesn't state a shift length.
How many hours does each office size need?
Dividing the NCES 8-hour figures gives the planning equivalents below. They are person-hour benchmarks, not guaranteed visit times. A real estimate applies the right level to each kind of space, for example the appearance level you choose for open office areas and the Level 2 benchmark for restrooms, instead of one level for the whole floor. An office kitchen may need its own task-based estimate, depending on how heavily it's used.
| Office size | Level 1 (spotless) | Level 2 (restroom-type) | Level 3 (school norm) |
|---|---|---|---|
| 1,000 sq ft | 44–48 min | 24–27 min | 15–17 min |
| 2,500 sq ft | 1 h 49 min – 2 h | 1 h – 1 h 07 min | 39–43 min |
| 5,000 sq ft | 3 h 38 min – 4 h | 2 h – 2 h 13 min | 1 h 17 min – 1 h 26 min |
| 10,000 sq ft | 7 h 16 min – 8 h | 4 h – 4 h 27 min | 2 h 35 min – 2 h 51 min |
| 20,000 sq ft | 14 h 33 min – 16 h | 8 h – 8 h 53 min | 5 h 10 min – 5 h 43 min |
These are person-hours. Two cleaners shorten the clock time by splitting tasks, but not always by half, because unlocking, setup and lockup still happen once. Use cleanable square feet, the floor that actually gets cleaned. Storage and mechanical rooms nobody touches don't count.
Why does a small office take longer than the table says?
Some work takes about the same time no matter how big the office is:
- Restrooms. Each toilet, urinal and sink is cleaned one at a time. Plan them at the slower Level 2 pace, so a small office with two restrooms spends a large share of the visit there.
- Kitchens and break rooms. Counters, sinks, appliance fronts and tables take longer per square foot than carpet.
- Getting in and out. The alarm, keys, setting up equipment, the trip to the dumpster and locking up take as long in a 1,500 sq ft office as in a 5,000 sq ft one.
- Equipment. In one Janitorial Manager example based on ISSA cleaning times, vacuuming 1,000 sq ft of carpet with a 12-inch upright is calculated at 34.8 minutes. That is one task with one machine. A wider vacuum covers the same floor faster.
- Layout and clutter. Many small rooms and crowded desks are slower to clean than an open plan.
That's why many cleaning companies set a minimum per visit.
Is a first deep clean longer?
Yes. A first visit usually catches up on what routine cleaning skips, such as baseboards, vents, door frames and buildup in restroom corners. How much longer it takes depends on the buildup and on what's in the scope, so ask whether it's quoted separately. After that, how often you clean decides how much each visit has to remove. See how often an office should be cleaned.
How do you use this to check a cleaning quote?
- Ask for the planned hours per visit and the crew size. A company that measured your space can tell you both.
- Divide your cleanable square feet by the person-hours. That's the pace the company is planning.
- Compare area by area. Match each major area with the closest NCES level or task time instead of testing the whole office against one rate. If the company's pace is much faster than your area-by-area estimate, ask how the planned hours cover the written task list. Equipment or a simple layout can explain part of the gap.
- Read the scope. The hours only mean something next to a written list of what gets done in each area on each visit.
Labor time is also what drives the price. See what office cleaning costs per square foot.
How does JCIL plan the time?
We clean offices after hours, in our overnight window from 10pm to 2am, so your team never works around us. At a free walkthrough we measure your space and count restrooms and kitchens. Then we plan the staffing needed to finish the agreed scope inside that window, and you get the scope and schedule in writing. See how after-hours office cleaning works.
FAQ
How long does it take to clean a 5,000 sq ft office?
Applying one NCES level to the whole floor as a planning scenario, about 2 to 2¼ person-hours at Level 2 and about 3⅔ to 4 at the "spotless" Level 1. A real estimate applies different paces to open office, restrooms and kitchen, and adds time to get in and lock up.
How long does it take to clean a small office?
Applying the NCES Level 1 benchmark to 1,000 cleanable square feet gives a planning equivalent of about 44 to 48 person-minutes. The visit can take longer, because getting in, setting up and locking up don't shrink with square footage, and restrooms and a kitchen take more time than open office space.
How long does it take to clean an office building?
As a rough planning scenario, applying the NCES Level 2 pace (18,000–20,000 sq ft per 8-hour shift) to all of a 50,000 sq ft building gives about 20 to 22 person-hours, split across a crew. A real building estimate separates offices, restrooms, food service and other space types.
Why do cleaning companies give such different time estimates?
A company planning far more square feet per person-hour may be using a lighter scope, different task frequencies, faster equipment or a lower level of clean. Ask it to show how the planned hours cover the written scope.
Sources
- NCES (U.S. Department of Education), Planning Guide for Maintaining School Facilities, NCES 2003-347, ch. 5, p. 81 (Feb 2003)
- APPA, Facilities Manager, "Operational Guidelines for Educational Facilities – Custodial", Alan S. Bigger (Jan/Feb 2013)
- Janitorial Manager, "What Good Are ISSA Cleaning Times for My Business?" (Mar 30, 2018)
Want the time for your own office in writing? Call (857) 777-0885 to book a free walkthrough, or see how our overnight cleaning works.