Most commercial cleaning problems are predictable in hindsight. These are the signals worth watching for before you sign a contract, not after service quality starts slipping.
No Written Scope of Work
A contractor who won't put the scope in writing — areas, tasks, frequency — is leaving room to under-deliver without accountability.
Reluctance to Provide Proof of Insurance
Any legitimate commercial cleaning company should readily provide a certificate of insurance. Hesitation here is a serious signal.
A Price Significantly Below Every Other Bid
An outlier-low quote is usually cutting frequency, staffing quality, or supplies somewhere. Ask specifically what's different before assuming it's just a better deal.
No Documented Process for Reporting Issues
If there's no clear channel for flagging a missed area or urgent issue between scheduled visits, problems accumulate until the next visit — or longer.
Vague Answers About Staffing and Coverage
A contractor who can't explain how they cover staff absences or turnover is more likely to leave your building uncleaned on short notice.
Long Lock-In Terms With Steep Cancellation Penalties
Aggressive contract terms that make it costly to leave, regardless of service quality, shift risk onto the property rather than the contractor.
No References From Comparable Properties
A contractor confident in their work can usually connect you with an existing client managing a similar building type.
Trust the Pattern, Not a Single Flag
Any one of these alone might have a reasonable explanation. Several together is a pattern worth taking seriously before signing.