You can buy a squeegee, a pole and a bottle of washing-up liquid for under £20 — so why do homes and businesses pay for professional window cleaning? The honest answer depends on your windows, your property and how much the finish actually matters to you. Here's a straight comparison.
Clarovista Solutions
Professional cleaning specialists · London & the UK
For a ground-floor flat with a couple of reachable windows, DIY can be perfectly fine. But the moment you have upper floors, large or awkward glass, hard water marks, or a business frontage, professional cleaning wins on finish, safety and time — and the cost per window is often less than you'd expect.
The key difference isn't the effort — it's the water. Professionals use purified water, which dries without leaving the dissolved minerals and streaks that tap water leaves behind. That's why a professional clean looks noticeably clearer, even on glass you thought was already clean.
| Feature | DIY | Professional |
|---|---|---|
| Cost (typical home) | £20 kit, your time | £15 – £45 per visit |
| Water used | Tap water → streaks & spots | Purified water → streak-free |
| Upper floors | Risky — ladders or leaning out | Safe reach-and-wash poles from the ground |
| Time per visit | 1 – 3 hours | 15 – 60 minutes (no effort from you) |
| Frames, sills & tracks | Often missed | Included as standard |
| Consistency | Depends on your schedule | Regular visits if you want them |
Ground-floor windows only. If you can reach every pane safely from inside or flat on the ground, you can do a decent job yourself.
A one-off quick tidy. Before guests or a viewing, a fast wipe-down can be enough — as long as streaks aren't a dealbreaker.
You genuinely enjoy it. Some people find it satisfying. If you have the time and the right tools, there's no harm in it.
Upper floors & hard-to-reach glass. Ladders and leaning out of windows are a real injury risk. Professionals reach upper floors safely using purified-water poles from the ground.
Hard water marks & builders' residue. Limescale and cement film need specialist treatment — ordinary washing-up liquid just smears them around.
Shopfronts & commercial premises. Streaky glass damages first impressions and sales. Read our shop front window cleaning approach.
Frames, sills, tracks & conservatories. The details most DIYers skip are exactly what makes a property look genuinely well-kept.
Consistency without the hassle. A regular plan means your windows stay clean year-round — no more "I really should do those this weekend."
Purified water. Filtered to remove minerals, so glass dries spot-free without wiping or buffing.
Detail work. Frames, sills, tracks and handles cleaned — the difference between "clean windows" and "a clean property."
Insurance & safety. Fully insured technicians using safe methods — no ladders balanced against your home.
A schedule that holds. Set it and forget it — weekly, fortnightly, monthly or quarterly visits as standard.
Rule of thumb: if you can reach every window safely from the ground and streaks don't bother you, DIY is fine. For anything else — especially upper floors and business premises — professional cleaning is safer, faster and far better looking.
Get a fast, no-obligation quote for one-off or regular window cleaning across London and the UK.
The questions we hear most about doing it yourself versus hiring a pro.