Out of hours cleaning, sometimes called night cleaning, means the cleaning team works before your staff arrive or after they leave, so the building is ready without anyone getting under anyone else's feet during the working day. It is common for offices, retail units and gyms with continuous daytime use.
It solves the disruption problem neatly, but it introduces a different set of questions that daytime cleaning never raises: who holds the keys, who knows the alarm code, is anyone working alone in an empty building, and how does the cleaning schedule fit around your actual opening and closing times. This guide walks through each of those questions honestly, along with the cases where daytime cleaning is actually the better choice.
The short version
- Out of hours cleaning removes daytime disruption but requires trusted access arrangements
- Keyholding and alarm codes need clear, written procedures, not informal agreements
- Lone working is a real consideration and should be planned for, not ignored
- Wet floor and drying time still needs managing even when nobody is around to slip
- Daytime cleaning suits buildings where presence, security or supervision matters more than disruption
Why businesses choose out of hours cleaning
The main reason is simple: cleaning does not compete with the working day. Vacuuming around desks, mopping around customers, or cleaning toilets while people are queuing to use them is disruptive for everyone involved, and out of hours cleaning avoids that entirely.
It also allows more thorough work in some cases, because a cleaning team is not constantly moving around people and can complete a room properly in one pass rather than working around occupied desks or display areas.
Keyholding: what a proper arrangement looks like
Keyholding is the practical foundation of any out of hours arrangement. It should be handled formally, with a written record of who holds keys, when they were issued, and what happens if a set is lost. Informal arrangements, such as leaving a key under a mat or with a neighbouring business, are not appropriate for commercial premises.
A reputable cleaning company will have its own procedures for storing and issuing keys securely, and should be able to explain them clearly if asked. It is entirely reasonable to ask about this before agreeing to an out of hours arrangement.
- Keys issued to named, vetted staff only, with a signed record
- Secure storage of keys off site, not left in vehicles overnight
- A clear process for reporting and responding to a lost key promptly
- An agreed process for changing locks if security is ever in doubt
Alarm codes and how they should be managed
Alarm codes are a similar issue to keys but carry their own considerations, particularly around who is told the code and how often it changes. Some businesses prefer to give the cleaning company its own unique code rather than sharing the main staff code, which makes it easier to see exactly when the building was entered and exited.
It is worth discussing with your alarm provider whether individual codes can be issued and logged, since that gives you a clear record without needing to change the code every time cleaning staff change.
Lone working: a real consideration, not a formality
A cleaner working alone in an empty building out of hours is a genuine lone working situation, and it should be treated as one rather than assumed to be fine because the building is familiar. A responsible cleaning company will have procedures for check-in and check-out, and a way to raise the alarm if something goes wrong.
This is one of the more overlooked aspects of out of hours cleaning from a client's perspective, but it matters both for the welfare of the person doing the work and for your own liability as the building's occupier or owner.
- A check-in and check-out system so someone always knows if a cleaner is on site
- A means of contacting help quickly if there is an incident or a fault with the building
- Clear procedures for what to do if an alarm is triggered accidentally
- Working in pairs where the building or the work itself makes that sensible
Access and the practicalities of getting in and out
Beyond keys and alarms, access covers the smaller practical details: where to park a vehicle at that time of night, which entrance to use, whether any areas are off limits, and how to leave the building secure at the end of the visit.
These details are worth putting in writing as part of the specification, because they rarely come up again once agreed, but they cause real problems on the first visit if left unclear.
Disruption is not eliminated, just moved
Out of hours cleaning removes disruption to staff and customers during the working day, but it does not remove disruption altogether, it moves it to a time when nobody is watching. A vacuum cleaner running at 6am in a building next to residential flats, or a floor machine running late at night in a shared building, can cause its own complaints if not thought through.
It is worth checking whether your premises share walls, floors or entrances with residential neighbours or other tenants, and factoring that into the timing agreed with the cleaning company.
Drying time still matters when nobody is there to slip
Wet floor cleaning still needs to be timed properly even out of hours, because the point is usually for the building to be dry and ready by the time staff or customers arrive, not simply clean at some point during the night. A floor mopped too close to opening time can still be wet, and a slip risk, when the first person walks in.
This is particularly relevant for hard floors and any carpet cleaning done out of hours, since drying times need to be built into the schedule so the visit finishes with enough margin before the building reopens.
When daytime cleaning is actually the better choice
Out of hours cleaning is not automatically the right answer for every building. Some sites benefit more from a visible daytime presence, where staff or customers can see cleaning happening, which can matter for hygiene-sensitive environments such as healthcare or food premises where visible cleanliness reassures people.
Daytime cleaning also avoids the keyholding, alarm and lone working considerations entirely, which can make it the simpler and lower-risk option for smaller premises where the disruption of a daytime visit is genuinely minor.
- Buildings where visible cleaning reassures staff, customers or patients
- Small premises where a short daytime visit causes little real disruption
- Sites where the security overhead of out of hours access outweighs the benefit
- Buildings without a suitable, secure means of managing keys and alarms
Deciding what suits your building
The right answer usually comes down to weighing disruption against the extra security and lone working considerations that out of hours access brings. A busy retail unit with continuous footfall usually gains a lot from out of hours cleaning, while a quiet office with a handful of staff might not need it at all.
Whichever way you decide, put the arrangement in writing, including keyholding, alarm procedures, timing and what happens in an emergency, so everyone involved knows exactly how it works.
Questions we get asked about this
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