A bad window cleaning company can leave streaks, damage frames, or disappear mid-job—wasting your money and time. Knowing which red flags to spot before signing a contract saves you headaches and protects your property. Here's what to watch for when vetting window cleaners.
No Insurance or Bonding
This is the biggest risk. If a cleaner damages your windows, gutters, or siding and lacks liability insurance, you're paying for repairs out of pocket. Ask any company for proof of general liability insurance (minimum $1 million coverage) and workers' compensation if they employ staff.
A legitimate operator will provide this instantly—either a certificate of insurance or direct contact info for their insurer to verify. If they hesitate, deflect, or claim "it's not necessary," move on.
Unwillingness to Provide References
Any established window cleaning business should have 5–10 recent client references ready to share. Real homeowners or property managers who've used them recently are worth their weight in gold.
Call or email at least two references and ask specific questions: Did the crew show up on time? Were windows actually clean, or did you spot streaks? Did they respect your property (no muddy footprints, broken plants)? References who've worked with the company in the last 6 months carry the most weight.
Vague or No Written Estimate
A professional provides a detailed, written estimate before work begins. It should include:
- Square footage of windows or number of panes
- Whether frames, sills, and screens are included
- Price per window or flat rate
- Timeline (same-day service, scheduled appointment, etc.)
- Any extra charges (screens, hard-water stains, gutter cleaning)
If a company quotes you over the phone with no breakdown, or gives a wildly different price from competitors (significantly higher or suspiciously lower), that's a warning. Typical residential window cleaning runs $150–$500 depending on home size and window difficulty; commercial jobs vary widely by building height and condition.
No Online Presence or Only Negative Reviews
Check Google Maps, Yelp, Trustpilot, or the Better Business Bureau. A company with zero online footprint is either brand new (which is fine) or intentionally hiding. More concerning: multiple reviews mentioning streaks, missed appointments, or damaged property.
One or two negative reviews among dozens of five-star ratings is normal. But if you see a pattern—"left water spots," "never came back," "overcharged"—trust the pattern.
Pressure to Pay Upfront in Full
Legitimate window cleaners ask for a deposit (typically 25–50% of the estimate) to book your appointment, then request final payment upon completion. Asking for 100% upfront before any work is done is a red flag, especially if they're a small or new operation.
If they insist on cash only and no receipt, that's another concern. Always pay by credit card or check so you have a record and recourse if work is substandard.
No Clear Communication on High-Access Work
If your home has second or third-story windows, ask directly how they'll access them. Will they use extension poles, a ladder, or a water-fed pole system? Do they have the equipment for your specific setup?
Some companies won't clean high windows at all—that's fine, as long as they tell you upfront rather than showing up unprepared. If they seem unsure or vague about access, they likely lack the right equipment or experience.
Unwillingness to Sign a Service Agreement
A simple one-page agreement protects both you and the company. It should outline the scope of work, date, price, and what happens if damage occurs. If a cleaner refuses to put anything in writing, they're not professional enough to trust with your property.
Cleaning Service Comparison Made Easy
Comparing multiple window cleaning quotes on your own takes hours. Platforms like Mercoly let you browse vetted local providers, read real reviews, and compare estimates side-by-side—cutting your vetting time in half.
Frequently Asked Questions
Q: How often should I have my windows professionally cleaned? Most homeowners benefit from professional cleaning 2–4 times per year, though it depends on your climate and surroundings (trees, nearby construction, or salt air warrant more frequent visits).
Q: What's the difference between a water-fed pole and traditional squeegee cleaning? Water-fed poles use purified water and long poles for high or hard-to-reach windows, while squeegee methods use ladders and hand tools; both work well, but poles are safer for two-story homes and prevent spotting.
Q: Should I get my screens and frames cleaned too? Yes—it's usually an add-on ($1–3 per screen) that makes a noticeable difference in how clean your home looks overall.
Use these red flags as a checklist before hiring, and you'll avoid costly mistakes.