If you work in an office or help run one, you probably notice cleaning mostly when something is missing: an overflowing bin, a restroom that needs attention, a lobby floor that looks tired. Behind those moments sits a fairly formal structure of written scopes, schedules, inspections and safety rules. This page explains how that structure usually works, what public standards and agencies say about it, and how someone who is not a cleaning professional can read a cleaning plan with some confidence. It also covers the people doing the work, because their safety is part of what a well-run program looks like. For the basics of methods and products, the guide's overview of how cleaning works is the companion piece.
Scopes of work and frequencies
A scope of work is the written list of what is to be cleaned, how, and how often. It is the backbone of almost every commercial arrangement, whether the work is done by employees or by an outside company. Frequencies are usually grouped into three bands. Daily tasks cover things that visibly degrade within hours, such as emptying waste, restocking restrooms and vacuuming entrances. Periodic tasks happen weekly, monthly or quarterly, for example dusting high surfaces or scrubbing floor edges. Project work is occasional and larger, such as deep cleaning carpet or stripping and refinishing a hard floor.
Carpet shows the pattern clearly. The Carpet and Rug Institute's CRI 204 commercial maintenance standard says every program should include three levels: routine cleaning (performed daily, weekly or more often), interim maintenance (appearance cleaning that can postpone deep cleaning) and deep cleaning. Its schedule table makes the point that frequency follows use. In a moderate-traffic building, deep cleaning is listed at 1 to 2 times a year, while in a severe-traffic setting it ranges from 2 to 26 times a year. The same logic applies to every surface in a building: a busy lobby and a rarely used meeting room do not need the same attention.
Frequencies are not universal. They depend on how many people use the space, the weather outside, the flooring, and what the occupants expect. A written scope exists so that these decisions are made once, deliberately, instead of being renegotiated whenever someone complains.
What a cleaning plan contains and how to read one
A cleaning plan turns a scope into a routine. A useful one names each area (entrance, open office, restrooms, break room, meeting rooms, stairwells), lists the tasks in each, states the frequency, and says who is responsible and when the work happens. It also records the equipment and products involved, which matters for safety and for matching products to surfaces. The guide's pages on floor care by surface type and carpet and upholstery care explain why that matching matters.
If you are asked to evaluate a plan, a few questions help regardless of building type. Does every area appear, including the unglamorous ones such as stairwells and storage rooms? Are frequencies tied to something observable, like traffic, instead of being copied from a template? Does the plan say what happens when a spill, a leak or a bodily-fluid incident occurs between scheduled visits? Is there a method for checking that the work was done? A plan that answers these is not guaranteed to be good, but a plan that cannot answer them usually signals gaps.
It also helps to separate cleaning from disinfecting. Most surfaces need ordinary cleaning, and disinfection is reserved for specific situations. The guide explains the distinction in disinfecting versus sanitizing versus cleaning, and a plan should use those terms precisely.
Inspection and quality measurement
How do you tell whether a building is clean enough? Two public frameworks come up often. The first describes outcomes. APPA defines five levels of cleanliness, which a university facilities page (Michigan Technological University) summarises. Level 1 is called Orderly Spotlessness, Level 2 Ordinary Tidiness, Level 3 Casual Inattention, Level 4 Moderate Dinginess and Level 5 Unkempt Neglect. The page rates floors, surfaces, ceilings and lighting, restrooms, customer satisfaction, response time, and trash. Restroom monitoring is described as weekly at Level 2 and monthly at Level 3, and trash containers at Levels 1 to 3 hold only the day's waste. The levels give a shared vocabulary: a building can state which level it is aiming for and then inspect against it.
The second framework describes management systems. ISSA, the cleaning industry association, publishes the Cleaning Industry Management Standard, known as CIMS. ISSA describes it as a certification for quality-driven building service contractors and in-house cleaning organizations. Its listed areas include operational excellence and quality management, hygienic environments (cleaning, disinfection and infection prevention), and Green Building criteria that support alignment with LEED certification. In other words, the first framework asks how clean the building looks and works, and the second asks whether the organization that cleans it has dependable systems.
Inspections themselves are simple in principle: someone walks the space with a checklist, compares what they see with the scope, and records gaps. What matters is that the checklist reflects the plan and that results lead to correction. Occupants can contribute by reporting problems through a defined channel, which is more useful than informal complaints that never reach the people who schedule the work.
Restrooms, break rooms, entrances and waste
Restrooms are the most scrutinised space because they combine heavy use with obvious health stakes. A plan usually sets restroom tasks at their own frequency, separate from the rest of the building, and the APPA restroom monitoring intervals above show how that frequency can step down as the target level drops. Break rooms need attention for a different reason: food residue, spills and shared appliances. The guide's page on office hygiene and shared surfaces covers high-touch points and shared kitchens in more detail.
Entrances do quiet but important work. The CRI 204 standard explains that mats extending 9 to 15 feet inside an entrance trap eighty percent of soil and moisture from the first five or six steps, and it recommends protective mats around food and coffee stations, water coolers, printers and elevators. Stopping dirt and water at the door protects floors, reduces slip hazards and cuts the workload everywhere else.
Waste handling sits at the other end of the day. Ordinary trash and recycling are routine, but some waste needs different treatment. OSHA's Bloodborne Pathogens page defines bloodborne pathogens as infectious microorganisms in human blood that can cause disease, naming hepatitis B, hepatitis C and HIV, and lists some housekeeping staff among the workers who may face exposure. Needlesticks and other sharps injuries are one route. Its Bloodborne Pathogens Standard (29 CFR 1910.1030) requires an employer to implement an exposure control plan, and OSHA calls engineering controls the primary means of eliminating or minimizing exposure. For a general reader the practical point is modest: if you find a needle or a bodily-fluid spill in a workplace, do not handle it casually, and report it to whoever manages the building so that trained people deal with it under the employer's plan.
Green cleaning standards in buildings
"Green cleaning" can mean anything unless it points to a named standard. In the United States, public buyers have set an example. A General Services Administration news release from April 2024 describes an updated custodial specification under which contractors must use cleaning products certified to ecolabels such as EPA's Safer Choice. For cleaners and hand soaps, it names Safer Choice or Green Seal GS-37, GS-41 or GS-53, certifications that do not allow intentionally added PFAS, and it points to the USDA BioPreferred minimum biobased content requirement. GSA says the specification affects more than 600 custodial contracts covering more than 1,500 government-owned buildings, at a cost of more than $400 million per year.
The lesson for private buildings is about method, not about copying a particular list. A credible green claim names a standard or certification, covers the products actually used, and can be checked. ISSA's CIMS adds a management layer by including Green Building criteria. ISSA says those criteria support alignment with LEED certification. Green products also do not remove the need for training: the label and the safety data sheet for each product still govern how it is used, as explained in reading cleaning product labels and safety data sheets.
Safety for the people who clean
Cleaning is physical, repetitive work, often done outside normal hours. NIOSH lists shiftwork, heavy lifting, prolonged standing, regular bending, work near body fluids or infectious agents and handling cleaning agents as typical hazards. It links them to psychosocial stress, musculoskeletal disorders, infectious diseases, and skin, allergic and respiratory conditions.
OSHA's cleaning industry hazards page is more specific. It lists chemical exposure (dermal exposure, chemical reactivity and occupational asthma), carbon monoxide from gasoline-powered engines and propane-powered floor burnishers, hazardous energy controlled through lockout/tagout, ergonomic strain, slips, trips and falls, falls from elevation, and hand contamination addressed through hand hygiene. Controls it points to include hazard communication, ventilation, protective equipment and training.
Chemical safety has a legal backbone. OSHA's Hazard Communication Standard requires employers to have labels on hazardous chemicals, to keep safety data sheets available to exposed workers, and to train workers to handle the chemicals appropriately. For occupants, the useful takeaway is that a cleaning cart stocked with unlabeled bottles is a warning sign, and that mixing products is a recognised danger covered in mixing cleaning chemicals safely. Nothing here replaces an employer's own training program or a product label, which have the final word.
In-house versus contracted cleaning
Buildings are cleaned in one of two ways, and many use a mix. With in-house cleaning, the building owner or tenant employs the cleaners directly, buys the supplies and equipment, and manages the schedule. With contracted cleaning, an outside building service company employs the staff and supplies the management, and the building agrees a scope of work with it. Neither model is automatically better. In-house teams can be tightly integrated with daily operations, while contractors can bring broader staffing, equipment and supervision systems. The trade-offs are about control, continuity, supervision and administrative load, and each building weighs them differently.
What does not change is the content of the job. The same scope, plan, inspection and safety questions apply either way, and CIMS is written to apply to in-house operations as well as outsourced contractors, which suggests the standards are about how work is run, not about who employs the workers. If you are weighing outside providers, the guide's page on choosing and vetting a cleaning company lists questions worth asking. Outdoor work follows its own logic, covered in the companion pillar on exterior pressure washing and soft washing.
Frequently asked questions
What is a scope of work in commercial cleaning?
It is a written description of the areas to be cleaned, the tasks in each area and how often they happen. It also sets expectations about timing and responsibility. Because it is written down, the same document can be used to plan, to inspect and to resolve disagreements.
Is there a standard way to measure how clean a building is?
There is no single universal measure. APPA's five levels of cleanliness describe appearance and service outcomes, and ISSA's CIMS assesses the management systems behind the cleaning. A building can state a level target and then check against it with regular walk-through inspections.
Do office workers need to worry about sharps or bodily fluids?
Most do not encounter them, but it can happen. OSHA's standard puts the responsibility on employers to have an exposure control plan. Anyone who finds a needle or a spill should avoid touching it and report it so that trained staff can respond.
Does a green label mean a product needs no safety precautions?
No. NIOSH and OSHA still expect labels, safety data sheets and training for every hazardous product, including products marketed as environmentally preferable. A certification speaks to ingredients and performance criteria, while the label speaks to use.
The short version
Commercial cleaning is organized around written scopes, frequencies matched to use, and routines that can be inspected. Public frameworks such as APPA's levels and ISSA's CIMS give shared vocabulary for quality, GSA's specification shows what named green standards look like in practice, and OSHA and NIOSH set the expectations for keeping cleaners safe. Whether the work is done in-house or by a contractor, the same questions apply: what is covered, how often, how it is checked, and how the people doing it are protected.