Commercial Cleaning, Held to a Medical Standard
Walk into a spotless workplace every morning without chasing anyone. Office cleaning, janitorial services, and clinical-grade disinfection for King County businesses and clinics. Part of MSNW Group, trusted at 5,000+ Pacific Northwest locations since 1995.
- Same-day make-it-right guarantee
- Free walkthrough, no-obligation quote
- Crews work evenings & weekends
- Bonded, insured & licensed in WA
Three decades of accreditation behind every clean.
King County Janitorial is part of MSNW Group, held to the standards of the industry's leading building-service, healthcare, and facility associations. Ask any other bidder to show you the same.
Two things, done impeccably.
Most cleaning companies do everything for everyone. We don't. We keep medical and professional spaces consistently, verifiably clean, with protocols built for the places people come to feel better.
Janitorial & office cleaning
Nightly, weekly, or on your schedule: a consistent crew that learns your building and keeps it looking its best every single morning. You never have to ask twice.
Disinfection & sanitization
EPA-registered disinfectants and clinical protocols for the spaces that can't cut corners: exam rooms, waiting areas, and every high-touch surface in between. Documented, verified, and done right.
Trust, built into every visit.
The people who run clinics don't have time to worry about the cleaning. Here's why they stop worrying once they call us.
PNW owned since 1995
Washington born and raised, part of MSNW Group. We answer our own phone and show up to your King County walkthrough in person.
Bonded & insured
Fully bonded, insured, and licensed in Washington. Your facility, your staff, and your patients are always protected.
A stable, dedicated workforce
Low turnover means familiar faces, greater accountability, and consistent quality. Every crew member is vetted, background-checked, and trained to BSCAI standards.
Technology-driven quality assurance
Multi-tiered inspections, CompanyCam-documented site reports, real-time Cleancode accountability tracking, and quarterly clinic manager surveys. You see what we see.
Responsive support, 24/7
Routine request or urgent need, our team answers around the clock. Uninterrupted service and peace of mind, never a voicemail black hole.
Our make-it-right guarantee
If something isn't right, we make it right the same day. No arguments, no excuses. That's the promise behind every clean.
Our crews train in a mock clinic before their first shift in yours.
Staff assigned to medical and healthcare accounts train in person, in a mock clinical environment, before they ever set foot on a live site. Under direct supervision they work through realistic exam rooms, patient areas, and clinical fixtures until the precision these spaces demand becomes routine.
Terminal cleaning and infection-control protocols are practiced until they are second nature. This hands-on model is central to how we prepare our people for clinical work, and we continue to invest in and expand it.
Every technician assigned to a medical account completes the training center before their first shift in your building.
We care for your space like it's our own backyard. Because it is.
Our crews work evenings and weekends, so your doors open to a spotless space every morning.
From first call to spotless, in four steps.
Free on-site walkthrough
We walk your building with you, learn your priorities, and follow up with a clear, no-obligation quote.
A plan built for your space
Scope, schedule, and protocols tailored to your facility, from the exam rooms to the front desk.
Your vetted crew arrives
The same background-checked team, trained on your plan, showing up on schedule like clockwork.
We check our own work
Routine quality inspections and a direct line to us. Standards never slip, and you're never left guessing.
A Washington company, keeping King County well since 1995.
We opened in 1995 with a simple idea: treat every space like it belongs to someone we care about. Three decades later, that idea has grown into MSNW Group, trusted to care for more than 5,000 locations across the Pacific Northwest.
Across King County, we focus on the spaces that demand the most: clinics and medical offices. The people who trust us with them deserve a team that never cuts corners. And because our crews stay for years, the faces you see stay familiar.
Trusted in waiting rooms across King County.
I just wanted to say thank you. Your crew did a great job with the carpet cleaning last week! Thank you for making it happen over 2 nights, the whole team appreciated feeling the clinic was so fresh and clean.
We love MSNW! Staff is quick to respond to our needs and take great pains to keep our facility clean and sanitized. Keep up the excellent work!
The janitorial services have been outstanding. Staff have noticed a huge improvement, especially the exam room floors, which look brand new. Please pass along our appreciation to the team!
Monica and Miguel are both lovely and fantastic cleaners... I was impressed that Miguel grabbed the ladder and wiped down the entire overhead light and arm without me prompting him. It was great! They work together well as a team and make great time while still doing things correctly. The rest of the department was cleaned properly and I didn't have any tips or corrections. You have a great duo in those guys. They did the best job of the three different cleaners I've watched here at COSC.
“It’s given us real peace of mind.”
Tom Youtsey put EvergreenHealth’s cleaning contract out to bid in 2014 and picked MSNW. Then the health system kept opening clinics.
Every corner of King County, covered.
From the Sound to the foothills: if your building is in King County, we clean it. Here are a few of the communities we serve:
Get your free quote.
Tell us a little about your space. We'll get back to you within one business day to schedule a free, no-obligation walkthrough.