How Often Should a Commercial Office Be Deep Cleaned?
Most commercial offices in Concord and Contra Costa County should be deep cleaned two to four times a year, on top of the nightly or weekly janitorial route. Offices with higher headcount, carpeted floors, food service on site or heavy visitor traffic land at the higher end; small professional suites with hard floors and light traffic land at the lower end. The right number comes from the building, not from a rule of thumb, and it should be written into the scope as dated project work rather than left to whenever the carpet starts to look tired.
Deep cleaning frequency by office type
| Office type | Typical deep clean frequency | What drives it |
|---|---|---|
| Small professional suite, hard floors, under 20 people | 1 to 2 times per year | Low traffic; nightly route handles most soil |
| Standard corporate office, carpeted, 20 to 100 people | 2 times per year | Carpet holds soil; spring and fall timing matches wet-season entry soil and summer dust |
| High-headcount or open-plan office, 100+ people | 3 to 4 times per year | Restroom and breakroom load, dense workstations, more surfaces per square foot |
| Office with a full kitchen or on-site food service | Quarterly | Grease migration, drains, appliance interiors and odor |
| Customer-facing office or showroom | Quarterly | Visitor traffic and first impressions; entry glass and lobby floors show wear fastest |
| Medical and dental office suites | Set room by room during the walkthrough | Exam rooms, waiting areas and restrooms are used differently and get their own frequency |
| Schools and childcare centers | Each term break | Floor refinishing and high dusting fit the windows when the building is empty |
What a deep clean covers that the nightly route does not
Nightly janitorial keeps a building presentable: trash, restrooms, breakroom, floors, high-touch surfaces. A deep clean reaches what the nightly route is not scoped to touch. Carpet extraction and traffic lane treatment. Hard floor scrubbing, and stripping and refinishing where the floor is VCT. High dusting of vents, light fixtures and the tops of cabinets and partitions. Baseboards, window sills and door frames. Upholstery vacuuming. Interior glass above reach height. Restroom tile and grout. Refrigerator and appliance interiors. Because it uses different equipment and takes longer, it is scheduled as project work with its own dates and its own line in the proposal.
The factors that move an office up or down the table
Headcount and hours. People generate soil. An office with 120 people on site five days a week needs more frequent deep work than one with 30 people on a hybrid schedule, regardless of square footage.
Flooring. Carpet holds soil and allergens in the fiber and needs periodic extraction. Hard floors show soil sooner but release it more easily, so the deep work is scrubbing and refinishing rather than extraction.
Food service on site. A full kitchen or catered lunches every day mean grease, drains and odor that a nightly wipe-down does not address.
Visitor traffic. Customer-facing offices track in more exterior soil and are judged on appearance, so entries and lobbies usually need quarterly attention even when the back office does not.
Season. In Contra Costa County, the wet months bring entry soil and mat lines, and the dry months bring dust. Many offices split their deep work into a spring service and a fall service for that reason.
Age of the finishes. Older carpet and flooring show soil sooner and need more frequent attention to look maintained.
How we set deep cleaning frequency for an office
During the walkthrough we look at the carpet lanes, the hard floor finish, the kitchen, the entry and the restroom tile, ask about headcount and hours, and then write deep cleaning into the scope as dated project work: which areas, which tasks, how often, and when in the year. That way the facility manager is not negotiating a one-off job every time the carpet looks tired, and the price of recurring service stays separate from the price of project work. Photo documentation is available on request, which is useful for floor and carpet work where the difference is easy to see.