Property Managers: How to Vet a Commercial Cleaning Vendor (and Red Flags to Avoid)

Cleaning is one of the few vendor relationships tenants experience every single day. When it fails, it fails visibly, and it lands in your inbox. Vetting properly at the front end costs one extra week and saves a re-tender six months later.

Verify the paperwork before you read the price

• Commercial general liability with limits appropriate to the asset, with you named as additional insured
• A current WSIB clearance certificate — request it directly, not a screenshot
• Certificate of insurance issued by the broker, listing the correct legal entity
• WHMIS 2015 training records and accessible safety data sheets

Interrogate the staffing model

Ask who is actually in your building. Employees under supervision behave differently than a rotating chain of subcontractors, and turnover is the root cause of most quality complaints.

• Employees or subcontractors? If subcontracted, how are they screened?
• Named crew assigned to the site, or a floating pool?
• What is annual turnover, and who covers a call-out?
• Are background and reference checks performed and retained?

Ask how quality is proven

Every vendor promises quality. Ask for the mechanism: how often a supervisor attends, what is inspected, how results are recorded, and what happens when a score fails.

If a vendor cannot describe their inspection process in one minute, they do not have one.

Test escalation before you need it

• One accountable account manager with a direct number
• A written response time for urgent requests such as floods or biohazard
• After-hours and weekend coverage clearly defined
• A named backup contact when your manager is unavailable

Red flags

• A bid materially below every other submission with the same scope
• A scope that lists tasks but no frequencies
• No site walkthrough before quoting
• Unwillingness to disclose crew count or hours per visit
• No references from comparable property types
• Vague periodic work priced as 'included as needed'

Compare on hours, not headline price

Ask every bidder for cleaning hours per visit and crew size. Divide the monthly price by monthly hours. If one vendor is 30 percent cheaper, they are almost always buying fewer hours — and the shortfall shows up in your tenant complaints, not their invoice.