Clean windows do more than boost curb appeal — they shape how clients, tenants, and employees perceive your business the moment they walk through the door. But commercial window cleaning isn’t just a cosmetic service. It often involves height, heavy equipment, and access to sensitive areas of your property, which means hiring the wrong company can expose you to real liability. Before you sign a contract, use this checklist to vet a provider properly.

1. Verify Proper Insurance Coverage

This is the single most important factor, yet it’s the one businesses skip most often. A reputable commercial window cleaning company should carry:

• General liability insurance — covers property damage, such as a cracked window or damaged landscaping.
• Workers’ compensation insurance — protects you if a technician is injured on your property. Without this, your own business insurance could be on the hook for medical costs or a lawsuit.
• Umbrella or excess liability coverage — especially important for high-rise or multi-story buildings where the risk (and potential payout) is higher.

Don’t just take a company’s word for it. Ask for a certificate of insurance (COI) naming your business, and call the insurer directly to confirm the policy is active and covers the scope of work.

2. Confirm Safety Certifications and Training

Window cleaning at height is regulated for good reason. Look for a company that follows OSHA guidelines and can show:

• Fall protection training and certification for technicians
• Documented safety protocols for scaffolding, ladders, or rope descent systems (RDS)
• Regular equipment inspections and maintenance logs
• A written safety plan specific to your building’s height and access points

If a company can’t produce this documentation on request, treat it as a red flag rather than an oversight.

3. Ask About Equipment and Access Methods

High-rise and low-rise buildings require very different approaches. Make sure the company has experience with your building type and the right equipment for it — whether that’s water-fed poles for ground-level and low-story work, or rope access and boom lifts for taller structures. A crew using improvised or outdated equipment isn’t just less efficient; it’s a liability waiting to happen.

4. Check Licensing and Local Compliance

Depending on your city or state, window cleaning companies may need specific business licenses or permits, particularly for high-rise work involving suspended access equipment. Confirm the company is licensed to operate in your jurisdiction and that any rope access technicians hold recognized certifications (such as IRATA or SPRAT).

5. Review Their Track Record

Insurance and certifications tell you a company is qualified, but references tell you they’re reliable. Ask for:

• Case studies or examples of similar commercial properties they’ve serviced
• References you can actually call, not just testimonials on a website
• Their claims history — a company with frequent incidents may have gaps in training or oversight, even if their paperwork looks fine

6. Get Everything in Writing

A professional contract should spell out scope of work, frequency, pricing, liability terms, and what happens if damage occurs. Vague verbal agreements leave both parties exposed. If a company hesitates to formalize terms in writing, consider it a sign of how they’ll handle other business commitments too.

Why This Checklist Matters

Hiring a window cleaning company might seem like a low-stakes decision, but the financial and legal exposure from an uninsured or poorly trained crew can be significant — especially for multi-story commercial properties. Taking the time to verify insurance, safety practices, and credentials upfront protects your building, your budget, and the people working on it.

If you’re evaluating providers and want a clearer picture of what proper coverage and safety compliance should look like in practice, Learn More about how a fully insured, safety-certified team approaches commercial window cleaning the right way.