“Deep clean” is one of the most used — and most misunderstood — terms in commercial cleaning. Daily cleaning keeps a workplace presentable; a deep clean resets it to a genuinely hygienic standard, reaching the dirt, grease and build-up that routine cleaning never touches. If you are comparing quotes or planning one for your premises, here is exactly what a thorough commercial deep clean should cover.
Deep clean vs. daily cleaning
Daily (or contract) cleaning is the regular, lighter-touch service that keeps surfaces, floors and washrooms in good order between visits. A deep clean is periodic and intensive: equipment is moved, high and low areas are reached, and sanitising goes well beyond the visible surfaces. Most businesses run a daily clean and schedule deep cleans quarterly or twice a year.
A room-by-room deep clean checklist
Offices & workspaces
- Desks, partitions and shelving cleaned and sanitised, including behind and underneath
- High-touch points disinfected — door handles, light switches, phones, keyboards, lift buttons
- Skirting boards, window sills, vents and radiators dusted and wiped
- Internal glass, partitions and signage polished
- Upholstered chairs and soft furnishings vacuumed or spot-treated
Washrooms
- Descaling of taps, toilets, urinals and shower areas
- Sanitising of all touch points, dispensers and partitions
- Grout, tiling and floor drains deep-cleaned where bacteria and odours gather
- Extraction grilles and vents cleared
Kitchens & breakout areas
- Appliances degreased inside and out — fridges, microwaves, ovens, dishwashers
- Cupboards, worktops and splashbacks sanitised
- Sinks, taps and waste areas descaled and disinfected
- For catering kitchens, extraction and ductwork are a specialist job — see kitchen exhaust & duct cleaning
Floors & carpets
- Hard floors scrubbed, and stripped/sealed where the finish needs restoring
- Carpets hot-water extracted (deep cleaned), with stains spot-treated
- Edges, corners and under-desk areas reached, not just the open floor
High-level & often-missed areas
- Light fittings, ceiling vents, ducting exteriors and high ledges
- Tops of cabinets, partitions and signage
- Behind and beneath heavy furniture and equipment
How often does a commercial space need a deep clean?
As a working guide: high-traffic sites (hospitality, healthcare, education) benefit from quarterly deep cleans; standard offices twice a year; plus one-off deep cleans before an inspection, after refurbishment, or when re-opening a space. High-touch disinfection, by contrast, belongs in the daily routine — more on that in our guide to disinfection and infection control.
What a good deep clean leaves you with
Beyond a visibly cleaner space: a documented scope of what was done, before-and-after photos where useful, and a schedule you can show auditors, insurers or an incoming tenant. For catering and healthcare settings, that record is part of staying compliant.
Frequently asked questions
Can a deep clean be done out of hours?
Yes — commercial deep cleans are usually carried out overnight, at weekends or during a planned shutdown so your operation is not disrupted.
Is carpet and floor cleaning included?
A full deep clean includes hard-floor and carpet deep cleaning. Heavily soiled or specialist floors may be quoted as an add-on — a site survey confirms the scope.
How is a deep clean priced?
Usually by area and condition rather than a flat rate, because a lightly used office and a busy catering kitchen need very different work. A free site survey is the reliable way to get an accurate figure.
Planning a deep clean for your premises? Crystal Facilities Management delivers scheduled and one-off commercial deep cleaning across London and the UK, with a documented scope and photographic evidence. Request a free site survey.
Written & reviewed by Crystal Facilities Management — ISO 9001-certified commercial cleaning and facilities management.
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