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Why cost per square metre misleads in North Sydney office cleaning quotes

Cost per square metre is the number every corporate real estate report asks for and the one that explains least. It compares floor plates that behave nothing alike and rewards the quote that assumed the least work. This page examines what the figure hides in North Sydney offices.

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In short

A cost per square metre figure for a North Sydney office is only meaningful alongside the task schedule that produced it. Two identical floor plates can differ substantially in cleaning effort depending on amenity count, meeting room density, occupancy and whether end-of-trip and kitchen facilities sit inside the tenancy.

Clean Best prices against a written task schedule rather than an area formula, and the proposal states the areas, tasks and frequencies behind the figure. A per-metre rate can then be calculated from it for benchmarking purposes, with the schedule available to explain any difference against another building.

The measurement itself is inconsistent

Before the rate can mislead you, the denominator already has. Some figures use net lettable area, some use the area actually cleaned, and the difference is significant once you exclude core, plant, risers and areas the cleaner never enters. A rate calculated on one basis compared against a rate calculated on another is not a comparison at all, and the basis is rarely stated alongside the number.

Ask which area figure was used before comparing anything. Then check whether both figures cover the same scope, since one may include base building common areas recovered through outgoings while the other covers tenancy only. Two apparently comparable rates for neighbouring buildings frequently turn out to be measuring different things in different ways. Establishing the basis takes one question and prevents a conclusion built on two incompatible figures.

What drives office cleaning cost is not area

The time spent on a floor concentrates in a small proportion of its area. Kitchens and tea points, washrooms if they sit within the tenancy, meeting and focus rooms, reception, and print areas absorb far more effort per square metre than open workstation floor. A tenancy with a large kitchen and eight meeting rooms will cost more than one of the same size with a single tea point, and the per-metre figure will simply record that as expensive.

Occupancy matters at least as much. The same floor at forty per cent attendance and at ninety per cent generates different waste volumes, different washroom load and different kitchen use. A per-metre benchmark that ignores occupancy will make a busy building look poorly managed and a quiet one look efficient, which is close to the opposite of the truth. Recording occupancy alongside the rate is the simplest correction available and costs nothing to collect.

Using the rate properly

The figure has one legitimate use: a sanity check. If a quote produces a rate far outside the range you see elsewhere in a portfolio, that is a prompt to look at the task schedule and find out why. Sometimes the answer is a genuine feature of the building. Sometimes it reveals a frequency nobody has reviewed for years, or a scope that quietly excludes half the amenities.

What it should not be is a target. Managing a portfolio towards a per-metre number drives scope reduction rather than efficiency, because the fastest way to improve the metric is to clean less. If the figure is required for reporting, publish it alongside the frequency and the amenity count so whoever reads it can see what the building actually receives. A benchmark reported without that context invites decisions that nobody would make with the schedule in front of them.

Testing a per-metre cleaning benchmark

  • Confirm which area basis each figure uses
  • Check whether base building areas are included
  • Record amenity, kitchen and meeting room counts
  • Note occupancy alongside the rate
  • Use the figure to prompt questions, not set targets
  • Publish frequency alongside any reported rate
Clean Best supervisor reviewing strata cleaning tasks in Parramatta NSW

Working in North Sydney and the Lower North Shore

North Sydney on the Lower North Shore is dominated by corporate towers, professional services and high-rise offices, where cleaning is frequently reported upward as a rate per square metre alongside other occupancy costs. Buildings in that market vary considerably in amenity provision and fitout density despite similar floor plates, which is precisely the variation the metric conceals. Clean Best services North Sydney tenancies from 54 Columbia Rd, Seven Hills, and prices against a written task schedule, so any rate calculated from it can be explained by the document behind it.

Questions about North Sydney

Is cost per square metre useless for cleaning?

Not useless, but limited. It works as a sanity check to identify quotes or buildings that sit well outside the usual range, which is a prompt to examine the task schedule. It fails as a comparison between buildings and as a management target, because the easiest way to improve the number is to reduce the scope.

Which area figure should be used for the calculation?

State whichever you use and apply it consistently. Net lettable area is common in reporting; cleanable area is more accurate for the purpose but less readily available. The problem is not the choice but the silence, since a rate calculated on one basis and compared with one calculated on another produces a conclusion with no foundation.

Why does one floor cost more than an identical one?

Usually amenity provision, meeting room density and occupancy. Kitchens, washrooms within the tenancy, meeting and focus rooms and print areas absorb disproportionate time relative to their area. A floor with a large kitchen and many enclosed rooms takes materially longer than an open floor of the same size, and the per-metre figure records that as expensive.

Should occupancy be reported alongside the rate?

It should, because waste volumes, washroom load and kitchen use all follow attendance rather than floor area. Without it, a busy building looks poorly managed and a quiet one looks efficient. Publishing occupancy and frequency alongside the rate gives whoever reads the report enough context to interpret the figure sensibly. Attendance data from the building access system is usually sufficient for the purpose.

How should a portfolio manager use the figure?

As a prompt for enquiry rather than a target. Where a building sits far outside the range, compare its task schedule and frequency against a similar site. Often the difference is legitimate. Where it is not, the schedule shows exactly which frequencies or exclusions are responsible, which a benchmark number never will. Record the reason for any legitimate outlier so the same question is not asked again next year.

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