Nobody actually tells you how often to deep clean your flat. Your parents say "when it needs it." Every cleaning company says "twice a year." Neither answer is that useful. The real answer depends on your property, how many people live there, whether you have pets, and the specific realities of renting in London — where hard water and urban pollution accelerate build-up faster than most places in the UK. Here's a practical, room-by-room guide with clear signs that tell you when you've left it too long. If you're not sure what a deep clean vs a regular clean actually involves, start there first.
The General Rule
For most households, a full deep clean once or twice a year is the standard recommendation. This assumes regular cleaning in between. The logic: a regular clean maintains surface-level hygiene, but grease, limescale, mould, and dust accumulate in areas a weekly cleaner doesn't reach — inside ovens, behind appliances, grout lines, and so on. Left unchecked, this build-up becomes harder to remove and can affect air quality, appliance lifespan, and the overall condition of the property.
By Room: How Often Each Area Needs a Deep Clean
- Kitchen oven and hob: every 3–4 months if used frequently; every 6 months if lighter use
- Kitchen cupboards and inside fridge: twice a year
- Bathroom grout and limescale: every 3 months in hard-water areas like London
- Shower head descaling: every 2–3 months (limescale reduces pressure and harbours bacteria)
- Behind and under furniture: twice a year
- Mattresses (vacuuming and sanitising): every 6 months
- Windows and window tracks (inside): twice a year
- Extractor fans: every 6 months
London Homes: Why More Often Is Often Right
London's hard water accelerates limescale build-up in bathrooms and kitchens significantly compared to softer-water regions. Air pollution also means that dust and particulates settle faster, particularly in homes near busy roads. For most London properties, a deep clean every 4–6 months rather than every 12 is a more realistic maintenance schedule — especially for bathrooms and kitchens.
Clear Signs You're Overdue
Your home is telling you it needs a deep clean when:
- The oven smokes or smells during use
- Grout lines are grey, brown, or black
- Shower pressure has dropped noticeably
- There's a persistent smell in the kitchen despite regular cleaning
- Dust reappears on surfaces within a day or two of a regular clean
- Skirting boards and window frames feel grimy to the touch
- The extractor fan sounds louder than usual
How to Make It Last Longer
A professional deep clean followed by consistent regular maintenance is the most efficient approach. Once the baseline is reset, a fortnightly regular clean keeps build-up from accumulating — meaning the next deep clean is easier, faster, and cheaper. Many DS Cleaners clients combine an initial deep clean with an ongoing domestic cleaning schedule for exactly this reason.