Facilities teams often assume that if desks are wiped and bins are emptied the office is covered. In practice a lot builds up out of sight, and knowing when routine cleaning has reached its limit protects both the space and the people using it.
What Daily Cleaning Actually Covers
Daily or routine office cleaning is built around visible, high-contact areas. It keeps the working environment tidy day to day but it was never designed to reach everything a building accumulates over time.
| Task | Daily Clean | Deep Clean |
|---|---|---|
| Desks, surfaces, bins | Yes | Yes |
| Vacuuming carpets | Yes | Extraction cleaning included |
| Washrooms | Yes | Descaling, grout and drain treatment |
| Behind and under furniture | No | Yes |
| Air vents and light fittings | No | Yes |
| Upholstery and soft furnishings | No | Yes |
| Kitchen appliances (internal) | No | Yes |
That gap is normal and by design. A daily clean is not meant to substitute for periodic deeper attention, it is meant to sit alongside it.
The Signs Your Office Is Overdue a Deep Clean
Some signs build up gradually enough that staff stop noticing them. A few are worth checking for on a regular walk-round, particularly since poor indoor air quality from dust and allergen buildup can affect staff well before anyone notices visible dirt.
- Dust on skirting boards, vents or high surfaces. These sit outside a daily clean’s usual reach and build up steadily over weeks.
- Carpets that look flat, stained or hold odours after vacuuming. Surface vacuuming lifts loose dirt but not what has worked into the fibres.
- A kitchen or breakout area that feels sticky despite daily wiping. Grease and spills often need degreasing agents a routine clean does not use.
- Washrooms that smell shortly after cleaning. This usually points to buildup in grout, drains or extraction that a surface clean cannot reach.
- Staff commenting on stuffiness or raised allergy symptoms. Dust and allergens in carpets, upholstery and vents can affect air quality long before anyone notices visible dirt.
- Grime building up around door handles and light switches. High-touch points that sit slightly outside the standard daily round.
Trigger Points Facilities Teams Should Watch For
Beyond visible wear, certain events in a building’s calendar are natural prompts to book a deep clean rather than wait for it to become obvious.
After a Refurbishment or Fit-Out
Construction and fit-out work leaves fine dust in places a daily clean will not reach, including ceiling voids, vents and behind newly installed fixtures. This dust tends to resettle for days or weeks after works finish. A deep clean before staff move back in clears it properly rather than letting it circulate through the ventilation system.
Following a Rise in Sickness Absence
An unexplained rise in colds, coughs or allergy complaints across a team is worth investigating alongside other causes. Carpets, upholstery and ventilation can hold allergens and bacteria that routine surface cleaning does not remove. This is part of why the British Cleaning Council has called for mandatory minimum cleanliness standards, arguing better workplace cleaning would help cut sickness absence across UK businesses. A scheduled deep clean is a straightforward step to rule out the building as a contributing factor.
Before a Lease Handback or Dilapidations Inspection
Tenants leaving a commercial lease are usually required to return it in the condition set out in the agreement, and dilapidations claims are where landlords recover the cost of putting that right. A thorough deep clean ahead of a landlord’s inspection addresses one part of that obligation and reduces the risk of a dispute over the state of the property at handback.
How Often Deep Cleaning Should Happen
There is no single frequency that suits every office. The right cycle depends on headcount density, how the space is used and how much footfall it sees, not just its size.
- Lower-occupancy offices or those on a hybrid pattern: every six months is usually sufficient
- Standard full-time occupancy: a quarterly deep clean keeps pace with typical wear
- High footfall, hot-desked or shared spaces: every eight to twelve weeks holds up better under heavier use
UK office occupancy hit a record high in early 2026 and has held there since, driven mainly by London. Fuller buildings wear faster, so a deep clean cycle set a year or two ago is worth checking against how the space is actually used now.
Partner with Us for Office Deep Cleaning
We work with facilities teams across London to plan deep cleans around real occupancy and building use rather than a generic schedule. Get in touch to arrange a walk-round or a quote.