Commercial Janitorial in Chicago, IL
Insured, documented, dependable janitorial for offices, medical, industrial, and multi-tenant buildings — a spotless facility every morning, on a schedule you can count on.
Full-Service Facility Cleaning
One accountable janitorial partner for every space in your building — cleaned to standard, documented, and done.
Eighteen Years of Spotless Facilities
A clean facility is invisible when it's done right and glaring when it's not. Sentinel exists to make cleaning the part of your building you never have to think about. For eighteen years, we've been Chicagoland's dependable janitorial partner — the crews that show up every night, the checklist that keeps standards high, and the account manager who actually answers the phone.
We clean offices, medical facilities, industrial spaces, and multi-tenant buildings across the metro, with insured, background-checked, professionally trained crews and documented quality assurance on every service. We're big enough to handle a portfolio of buildings and disciplined enough to make every one of them spotless. Facilities managers stay with us for years because we do the unglamorous work reliably, communicate clearly, and treat their building's cleanliness — and reputation — as seriously as they do. When janitorial just works, that's us.
- ✓Insured, bonded & documented
- ✓Nightly crews, dependable schedule
- ✓Dedicated account management
- ✓Offices, medical, industrial & multi-tenant
A Clean Transition, Fast
Switching janitorial vendors shouldn't be a headache. Here's how we make it seamless.
Walkthrough & Bid
We walk your facility, understand your needs and standards, and provide a clear, detailed, competitive bid.
Staff & Schedule
We assign and train a dedicated crew, build your cleaning scope and schedule, and set up quality checks.
Clean & Verify
Crews clean to spec nightly, we log and inspect every service, and your account manager keeps you informed.
Every Space, to Standard
A few of the Chicagoland facilities we clean, night after night.
What 'Done Right' Means
The discipline behind a facility that's spotless every single morning.
Checklist-Driven
Every crew works a defined scope and checklist per facility, so cleaning is consistent and never depends on memory.
Inspected & Logged
Supervisors inspect and log each service, so standards hold and any issue is caught and fixed fast.
One Point of Contact
A dedicated account manager owns your facility — clear communication, fast response, and real accountability.
One Vendor, Every Building
If you manage more than one facility, juggling separate janitorial vendors is a headache you don't need. Sentinel consolidates it — one insured, accountable partner cleaning every building in your portfolio to a consistent standard, on one contract, with one point of contact and unified reporting.
You get predictable pricing across your properties, documented quality assurance you can show ownership and tenants, and the flexibility to scale as your portfolio grows or your needs shift. Whether it's a single office tower or a portfolio of mixed-use buildings across Chicagoland, we bring the same discipline, the same reliability, and the same spotless result to all of them. Let's talk about consolidating your janitorial with a partner built to handle it.
- ✓One contract across your portfolio
- ✓Consistent standard, every building
- ✓Unified reporting & QA documentation
- ✓Predictable, transparent pricing
Trusted Across Chicagoland
Sentinel has cleaned our downtown office for six years and the consistency is what keeps us with them. The building is spotless every single morning, their QA checks mean nothing slips, and on the rare occasion we need something extra, they handle it same-day. For facilities managers, that reliability is worth everything.
We manage several multi-tenant buildings and Sentinel handles janitorial across all of them on one contract. Documented, insured, and professional, with crews that show up every night without fail. Tenant complaints dropped to near zero after we switched. They've made a hard part of my job genuinely easy.
Our medical facility has strict cleanliness and compliance requirements, and Sentinel meets them without fail. Their crews are trained on healthcare protocols, everything is documented, and inspections are never a worry. Trustworthy, thorough, and communicative. Exactly the janitorial partner a facility like ours needs.
Request a Janitorial Bid
Tell us about your facility and we'll walk it, scope it, and give you a clear, competitive bid — with a seamless transition and a spotless result.
Commercial Janitorial FAQ
What types of facilities do you clean?
We service a wide range: corporate offices, medical and dental facilities, industrial and warehouse spaces, multi-tenant and mixed-use buildings, and more across Chicagoland. Our crews are trained on the appropriate protocols for each — including healthcare and food-safety compliance where required — so we can match the standard your specific facility demands.
Do you clean nightly and after hours?
Yes — most of our work is done nightly or after hours so your facility is spotless by the time your team arrives, with zero disruption to your operation. We also offer day porter service for high-traffic buildings that need upkeep throughout the day. We build the schedule around your building's hours and needs.
Are you insured and bonded?
Fully. We carry comprehensive insurance and bonding, and every crew member is background-checked and professionally trained. We provide a certificate of insurance for your building's records and can meet specific coverage or compliance requirements your property or tenants require. Your facility and its occupants are protected.
How do you ensure consistent quality?
Through documented, checklist-driven cleaning and regular supervisor inspections. Every facility has a defined scope and checklist, every service is logged, and supervisors inspect against standards so nothing slips. Your dedicated account manager reviews performance with you and resolves any issue quickly. Consistency is the entire point of a good janitorial partner.
Can you handle multiple buildings on one contract?
Absolutely — it's one of the main reasons property and facilities managers choose us. We service portfolios of buildings on a single contract with one point of contact, consistent standards across every property, unified reporting, and predictable pricing. Consolidating your janitorial with one accountable vendor makes your job simpler and your buildings more consistent.
How does switching to Sentinel work?
It's designed to be seamless. After a walkthrough and bid, we assign and train a dedicated crew, build your scope and schedule, and set up quality checks — typically onboarding a facility within a week without missing a night. We've transitioned facilities on short notice many times. Call (312) 555-0177 or request a bid to get started.
Let's Scope Your Facility
Tell us about your building and cleaning needs. We'll walk it, scope it, and get you a clear, competitive bid — usually within a couple of days.