How to Choose a Commercial Cleaning Company Without Getting Burned

We've been on the other side of hundreds of vendor searches since 2013 — sometimes as the incumbent, more often as the company that got called in after a facility manager's first choice fell apart. The pattern repeats: the buyer picked based on price and a friendly sales call, and six months later they're fielding complaints, chasing down a supervisor who never shows up, and starting the search over. Most "how to choose a cleaning company" advice online is generic enough to apply to any vendor decision. This isn't that. It's the specific checklist that actually predicts whether a cleaning company holds up.

Why Most 'How to Choose' Advice Is Useless

Search "how to choose a commercial cleaning company" and you'll get lists that say things like "check reviews" and "make sure they're insured." True, but useless on their own — every vendor claims insurance and every vendor has a handful of five-star reviews from someone. The advice that actually matters is more specific: who supervises the work, whether the same people show up each visit, what the insurance actually covers versus just having a certificate, and whether the references you're handed will tell you anything real if you ask the right questions.

The Supervision Model Question

Ask every vendor this directly: "Who supervises my building, how often are they physically on site, and what happens when they're not?" The answers separate real operations from a labor-arbitrage business wearing a uniform.

On-site supervision explained

A legitimate supervision model has a named person — not a call center — responsible for a defined number of accounts, with a documented visit cadence (weekly walkthroughs are typical for standard commercial accounts, more frequent for medical or high-traffic sites) and a quality scoring system tied to those visits. If a sales rep can't tell you the supervisor's visit frequency for accounts your size, there likely isn't one.

Crew Consistency vs. Warm Bodies

The single biggest driver of complaints we see when replacing another vendor is crew turnover: a different person (or agency temp) shows up every week, nobody learns the building's quirks, and quality swings wildly night to night. Ask directly what the company's crew turnover rate is and whether the same crew is assigned to your account long-term, or whether staffing is pulled from a rotating labor pool.

Turnover and the same-crew promise

A vendor with low turnover can tell you, specifically, how long the crew currently assigned to comparable accounts has been with the company. "We try to keep the same people" is a soft answer. "Our average crew tenure on commercial accounts is over two years" is a real one — and it's a fair follow-up question to ask for in writing.

Insurance, Bonding, and What They Cover

Every vendor will show you a certificate of insurance. Read what's actually covered: general liability limits (commercial buildings should look for at least $1M per occurrence / $2M aggregate as a baseline, higher for larger or higher-risk facilities), workers' compensation, and whether crews are bonded against theft. A certificate that lists minimum state-required limits on a vendor cleaning a multi-tenant office building is a red flag, not a checkbox.

What to verify before signing

Ask your broker or facilities counsel to confirm the certificate names your organization as an additional insured for the contract term, not just the vendor's own coverage. This single step prevents the worst-case scenario: an incident on your property where the vendor's coverage doesn't actually extend to you.

References You Should Actually Call

Every vendor hands you their best three references. Call them, but ask questions that go past "are you happy" — see our companion guide on exactly what to ask references and how to read between the lines of their answers. The short version: ask how long they've been a customer, what happens when something goes wrong, and whether the crew has changed since they signed.

The ISSA's CIMS certification program (Cleaning Industry Management Standard) is one of the few third-party frameworks that actually audits a vendor's management systems — quality, training, and health/safety — rather than just checking a licensing box. Asking whether a vendor is CIMS-certified is a fast way to filter for operational maturity. IFMA also publishes vendor-selection guidance geared toward facility managers evaluating outsourced service providers, worth a skim before your first round of vendor calls.

Background Checks and Staff Screening

Cleaning crews often have keys, alarm codes, and unsupervised after-hours access to your entire facility — including areas with sensitive documents, IT infrastructure, or client data. Ask directly whether background checks are run on every employee before they're assigned to an account, not just at initial hiring for a small subset of staff, and whether that screening is repeated periodically or only done once. A vendor that can't answer this clearly is asking you to extend a level of trust they haven't actually earned through process.

Chemical Handling and Product Standards

Ask what cleaning products a vendor uses and whether staff are trained on OSHA's Hazard Communication Standard, including reading Safety Data Sheets and proper dilution and storage of chemicals. This matters for two reasons: improperly mixed or applied chemicals can damage flooring and surfaces, and untrained handling creates a liability exposure for both the vendor and your facility. A company that documents its chemical training and can show you its SDS binder on request is operating at a different level than one that can't.

How Long the Company Has Actually Operated

Longevity isn't everything, but a company that's been operating continuously under the same ownership for a decade or more has weathered staff turnover, seasonal demand swings, and difficult accounts without folding — which tells you something a glossy proposal can't. Ask how long the company has been in business under its current name and ownership, since some vendors rebrand after reputational problems and a new name can obscure a spotty track record.

Putting It All Together in a Vendor Scorecard

The easiest way to keep multiple vendor conversations straight is to build a simple scorecard before your first call: supervision model and visit frequency, crew turnover, insurance limits and additional-insured status, background check policy, chemical training, years in business under current ownership, and reference quality. Score each vendor consistently across the same categories rather than relying on which sales rep made the best impression, since impression and operational substance don't always line up.

The First Call vs. the Site Walkthrough

A phone call or email exchange is fine for a first screen, but no vendor should be finalized without an in-person walkthrough of your actual facility. The walkthrough is where a sales pitch either holds up or falls apart — a vendor who can speak specifically to your floor types, restroom count, and traffic patterns after seeing the space is operating differently than one who's still speaking in generalities after being on site.

We've built our own operation around passing this exact checklist: named on-site supervisors with documented walkthrough schedules, background-checked crews with low turnover, and insurance that's been vetted by clients' own risk teams for over a decade. If you're in the middle of a vendor search, we're happy to walk your facility and show you exactly how we'd staff and supervise it — no pressure, no generic pitch.