Moving janitorial work from the night shift to the day shift can lower a commercial building's energy bill, mostly because lights and, in some buildings, heating and cooling no longer have to run for an evening crew. Industry studies put the annual energy cost savings at roughly 4% to 8%. That figure is a range, not a promise. Whether your building lands at the bottom, the top or below it depends on your lighting controls, your HVAC schedule and how well the switch is managed.
This guide is for property managers, facility directors and building owners who hold the cleaning contract. It covers where the savings come from, what has to be true for you to capture them, what else changes when crews work alongside occupants, and how to phase the change in.
TL;DR
- Day shift cleaning is associated with 4% to 8% in annual energy cost savings, driven mainly by lighting.
- The savings are largest when day cleaning is paired with a strict lights-out policy and a review of HVAC and energy management settings.
- Staff need customer service and safety training, and the move works best as a phased change over several months.
- Day cleaning must go with green cleaning products, or you trade an energy problem for an indoor air quality problem.
- Labor savings from consolidating day porter and evening janitorial duties can matter as much as the utility bill.
Table of Contents
- Why night cleaning costs more energy than it seems
- Where the savings come from
- What has to be true to capture the savings
- A worked way to estimate your own savings
- The costs and risks to plan for
- Benefits beyond the utility bill
- How to phase in the switch
- Our perspective on day cleaning
- Getting a day cleaning program scoped
- Checklist before you decide
- FAQ
- Sources
Why night cleaning costs more energy than it seems
A night crew works in a building that is otherwise empty. Yet the crew still needs light, and often the building keeps conditioning air for them. Floors stay lit while cleaners move through them, and thermostats stay at occupied settings longer than the last tenant needs.
The BlueGreen Alliance report Clean Sweep describes this directly. Keeping lights and heating or cooling systems running through the night is what day shift cleaning is meant to avoid. The same research notes that lighting accounts for about 38% of a building's overall electricity use, which is why it is the main lever.
Some facility teams already schedule energy-intensive work for the evening because off-peak electricity is cheaper. Buildings magazine points out that cleaning does not fit that logic. It is labor-driven work that needs light, so the cost of running the building around it is a real cost.
Where the savings come from
Lighting
Every hour a floor stays lit for a cleaner is an hour of lighting load. With day cleaning, the work happens while the floor is already occupied and lit, or in daylight. Nothing extra has to be switched on. For a large office or retail center, this is the biggest and easiest piece of the 4% to 8% range.
HVAC runtime
The second piece is conditioning. If your building automation can set back temperatures overnight, a night crew often forces you to override that schedule in the zones being cleaned. Day cleaning removes the reason for the override. The savings here vary by climate, equipment and controls, so treat any single number with caution and measure your own.
Labor consolidation
Energy is not the only line item. Buildings magazine reports that some companies have saved tens of thousands of dollars a year by removing duplicate labor, consolidating duties between existing day porters and evening janitorial crews. If you already pay for day porter coverage, ask whether part of the night scope can be absorbed into it. Our guide to cutting building maintenance cleaning costs covers more of that math.
What has to be true to capture the savings
Moving the shift on a calendar does nothing for the meter unless the building behaves differently. Three conditions matter.
1. A real lights-out policy
ENERGY STAR's guidance says the savings from day cleaning are strongest when combined with active lighting audits. Lights should go off right after occupants leave each zone, not stay on across entire floors for an evening crew that no longer exists. Its low-cost measures list also starts with a nighttime audit, a walk-through to find what is running after hours that should not be.
A simple version: do the nighttime audit before you change anything, record what is on, then repeat it 30 days after the switch. The difference is your first honest data point.
2. Using your energy management system fully
Many buildings own a capable energy management system (EMS) and use it only to turn things on and off. ENERGY STAR's operation and maintenance best practices describe how efficient O&M reduces energy use without major capital investment. In practice, the move to day cleaning forces a schedule review. That review is a good moment to turn on features such as automated lighting sweeps and night setback, which capture more than a basic on/off schedule can.
If your lighting controls are dated, the schedule review often exposes it. Retrofit economics vary by state and utility. For one example of how a lighting upgrade is planned and financed, see this energy efficient lighting upgrades playbook, which is written for Florida properties, so check your own state's incentives.
3. Ventilation handled on purpose
The U.S. Department of Energy's Ventilation Assessment and Action Guide notes that sufficient ventilation and reduced energy use are often seen as competing priorities, because outdoor air must be heated or cooled. Cleaning schedules should not be set in isolation from that. Daytime cleaning lets you adjust and oversee building systems in real time while people are present, so you can keep air quality and energy use in balance instead of choosing one.
A worked way to estimate your own savings
We will not invent a dollar figure for your building. You can build a reasonable estimate yourself, using the published range as a frame.
- Pull 12 months of utility cost for the building.
- Take the 4% and 8% points of that annual energy cost. That is your low and high scenario.
- Run a nighttime audit to see how many floors are lit and conditioned for the cleaning crew today. If most of the building is dark by 8 p.m. except the cleaned zones, expect the lower end. If whole floors stay lit all night, you are a better candidate for the upper end.
- Add any labor you can consolidate with existing day porters. Get a quote for both versions of the scope.
- Subtract transition costs: staff training, communication to tenants, and possibly a short period of overlap.
The result is a range you can defend to an owner or asset manager. After the switch, compare real bills against the same months of the previous year, adjusting for weather.
The costs and risks to plan for
Day cleaning is not free of tradeoffs. Facilities Management Insights ran a piece titled around the fact that experts differ on the model's future, even as a study touted its lower energy use. Take that seriously. Day cleaning suits some buildings better than others.
| Factor | Favors day cleaning | Favors keeping night cleaning |
|---|---|---|
| Lighting and HVAC controls | Zone-level controls, active EMS | Single-zone systems that cannot be scheduled by area |
| Occupant type | Standard offices, retail centers, multifamily common areas | Spaces needing quiet or restricted access, such as certain labs |
| Current staffing | Day porters already on site | No daytime presence at all |
| Tenant culture | Open to a communication campaign | Strong resistance, no property-level control |
The main risks are disruption and noise. Running a vacuum next to a conference room will cost you goodwill faster than any energy savings earn it. That is solved with scheduling, equipment choices and training, not by abandoning the idea.
Training is not optional
In a daytime model, cleaners are no longer working in an empty building. Facilities Management Insights reports that staff need customer service and safety training on top of cleaning technique, so they can interact professionally and safely with occupants. When you vet a cleaning contractor for this model, ask what that training looks like and who delivers it.
Green products are part of the deal
The BlueGreen Alliance framing is that day cleaning belongs inside a green building strategy. If you shift to daytime but keep using hazardous, toxic chemicals, the energy benefit is undermined by new health and indoor air quality issues, since occupants are now breathing what crews use. Day cleaning needs green cleaning protocols behind it.
Two of our own guides help here: what green cleaning is and what it does for offices and swapping high-VOC cleaners. For the broader picture, read how cleaning affects indoor air quality.
Benefits beyond the utility bill
The ISSA white paper The Value of Cleaning includes daytime cleaning among its energy savings points, and it links the model to other gains. Programs can lead to reduced worker turnover, higher morale and better quality assurance scores, because cleaning staff become part of the daytime work culture and interact more positively with occupants.
There is a practical side too. A cleaner who sees a spill when it happens can respond right away, and a manager can walk the floor with the crew lead instead of reading a report the next morning. Quality control gets easier when the person who cleaned and the person who inspects are on site at the same time.
How to phase in the switch
Do not flip the building overnight. ISSA's white paper notes the change typically takes a phased approach over several months, so the workforce can adapt and occupants can be educated. A workable sequence:
- Audit first. Run the nighttime audit and gather baseline utility data.
- Pick a pilot. Choose one floor or one tenant that is receptive. Lobbies, restrooms and common areas are the usual first candidates.
- Train the crew. Cover customer service, safety, noise and equipment choices.
- Tell occupants. Explain what will happen, when, and who to call.
- Move tasks in stages. Shift restroom and break room work first. Keep tasks that are disruptive, like carpet extraction or floor refinishing, in off hours until you have confidence.
- Lock in the controls. Update lighting sweeps and setback schedules so the energy savings actually appear.
- Measure and adjust. Compare 90 days of bills and service complaints against your baseline.
If you are also reviewing how often each area is cleaned, our cleaning frequency guide for large commercial buildings and the routine facility cleaning process walk through scoping.
Our perspective on day cleaning
We clean office buildings, retail centers, multifamily properties, industrial sites and healthcare facilities, and we offer both routine janitorial and day porter services. That gives us a plain view of this topic: day cleaning is rarely about the cleaning. It is about whether the building's operations are ready to change.
When a property manager asks us about energy savings, we start with the building, not the schedule. Do the lighting controls work by zone? Is anyone checking what is on after hours? Are day porters already doing work that a night crew duplicates? If the answers are good, a daytime model can pay off. If the lights stay on regardless, moving the shift only changes who is in the building.
We also think the quality of the crew matters more in daytime than at night. People will see the work, and they will remember how the crew behaved. That is why we favor local crews, a site visit before any quote, and eco-friendly options for properties pursuing LEED. Our model is not franchised, so the people you meet at the walk-through are the people accountable for the result.
One more honest point: some spaces are better cleaned at night, and some tasks always will be. A good contractor will tell you which, rather than sell a single answer for every floor.
— Sales
Getting a day cleaning program scoped
If you want to test the idea on one property, we can walk it with you. Our four-step process is a quote, a site visit, scheduled cleaning and your approval. The site visit is where we look at traffic patterns, tenant hours, and whether routine janitorial, day porter or a mix fits. We handle janitorial and day porter services nationwide with local crews, and we offer a 24-hour response. Operating in New Jersey? See our New Jersey page.
The listed services have no published prices, because pricing depends on property size, frequency and scope. We quote after the visit.
Checklist before you decide
- Baseline: 12 months of utility data and a completed nighttime audit.
- Controls: zone lighting, sweeps and setback are working or will be fixed.
- Contractor: trained in customer service and safety, licensed and insured, using green products.
- Scope: which tasks move to daytime, which stay at night.
- Communication: tenants and staff know what is changing.
- Review: a 90-day comparison against baseline, with a named owner.
For wider upkeep ideas, see our guides on improving building cleanliness and property maintenance for facility managers.
FAQ
How much energy does day cleaning actually save?
Industry studies cited by the BlueGreen Alliance report annual energy cost savings of about 4% to 8%. Your result depends on lighting controls, HVAC schedules and how many zones were lit for night crews. Establish a baseline before the switch so you can measure your own number.
Does day cleaning save money if I already have a night crew?
Possibly, in two ways: lower lighting and conditioning costs, and consolidated labor if you also pay for day porters. Some companies have reported saving tens of thousands of dollars a year from removing duplicate labor. Ask your contractor to quote both scopes side by side.
Will day cleaning disrupt my tenants?
It can if it is rushed. A phased rollout over several months, staff training in customer service and safety, and clear tenant communication reduce the risk. Noisy or disruptive tasks can stay in off hours.
Do green cleaning products matter for day cleaning?
Yes. Occupants are present while products are used, so hazardous chemicals can create indoor air quality problems that cancel the benefit of the energy savings. Day cleaning should be paired with green cleaning protocols.
Sources
- CLEAN SWEEP, BlueGreen Alliance
- See the Light of Day Cleaning, Buildings
- The Value of Cleaning, ISSA
- Experts Differ on Future of Day Cleaning, Facilities Management Insights
- Checklists of Energy-Saving Measures, ENERGY STAR
- Operation and Maintenance Best Practices, ENERGY STAR
- Ventilation Assessment and Action Guide, U.S. Department of Energy