Commercial and facility
cleaning: a buyer's guide.

01The four checks that actually matter

Most commercial cleaning quotes are compared on price per visit, which is close to useless because the visits are not the same. Four questions separate contractors far more reliably.

Can they genuinely work your hours? Do they own the equipment your site needs? Have they done your kind of premises? What happens when something is missed?

Everything below is those four in detail. If you only ask four questions, ask those, and ask them before you look at the numbers.

02Working around a business that cannot close

Almost every commercial site shares one constraint: the cleaning must not interrupt the trading. That is a scheduling problem before it is a cleaning problem, and it is where contracts most often fail in practice.

Offices are usually handled outside hours or in zones so no area is unusable for long. Showrooms are done before opening. Factories work to a shift boundary. What matters when choosing is whether the schedule is written into the arrangement at the quoting stage, or left to be negotiated every week — because the second arrangement quietly becomes whatever suits the contractor.

03Equipment: what a site needs and who owns it

A contractor who hires equipment for each visit is slower, less available and more expensive over a year than one who owns it, and is far less likely to be able to respond to something unplanned.

The equipment that separates contractors is machine floor-scrubbing capability, access equipment for anything at height, and the range of chemistry to treat different surfaces properly. For a site with a large hard floor or any facade glass, those are the questions that decide whether the contract works.

04Premises types are not interchangeable

An office, a clinic, a car showroom and a warehouse look like four versions of the same contract and are not.

An office is a traffic and touchpoint problem. A clinic adds disinfection and a stricter sequence. A showroom is about finish under display lighting, where an uneven floor or streaked glass costs sales. A warehouse or factory is about scale, oil and floor safety.

Asking a contractor which of these they do most of is more informative than asking for references, because most will have a reference for everything.

05What hospital-grade disinfection actually means

It means a disinfection step added to cleaning, to a standard the premises require — and the order is the whole point. Disinfectant applied over soil does very little, because the soil physically shields the surfaces the disinfectant is meant to reach. Clean first, then disinfect, and respect the contact time rather than wiping it off immediately.

Be wary of the phrase used as a synonym for thorough. It describes a sequence and a product choice, not an accreditation, and any contractor implying it is a certification is overstating.

06Frequency, and why the calendar is the wrong tool

Frequency should follow traffic and surface, not the calendar. A showroom with a polished floor and constant visitors needs attention many times more often than a back office of the same size. Washrooms and touchpoints in a clinic need more than either.

The efficient structure is a routine schedule for the everyday work and a separate, less frequent cycle for the expensive interventions — floor restoration, high-access glass, deep cleans. Bundling them into one frequency means paying restoration prices for routine work or vice versa.

07What happens when something is missed

Something will be missed; the question is only what follows. The two things worth establishing are who checks the work, and whether the contractor returns without an argument.

A check carried out by someone other than the person who cleaned is materially better than one done by the cleaner, and better than a promise that the owner personally inspects every job — because a business with several crews out cannot honestly hold to that, and the ones that promise it are usually the ones whose standards drift. Here, the quality control team does the check.

08Reading a commercial quote

Look for what is excluded rather than what is included; the exclusions are where quotes differ. Common ones worth confirming: window frames and tracks, high-level dusting, floor machine work, consumables, and anything above ladder height.

Then compare on scope rather than on the total. A quote that is twenty per cent higher and includes the facade glass and machine floor work is usually the cheaper one by the end of the year.