Office Cleaning
Spotless, healthy workspaces cleaned on your schedule — daily, weekly, or after hours.
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Commercial Cleaning · Knoxville, Tennessee
Cleaning green to keep our planet clean.
Forty years of immaculate offices, handover-ready construction sites, and spotless venues across East Tennessee — delivered by insured, background-checked crews using green-certified products.
Since 1985
Family Operated
USGBC
Green Council Member
24/7
Emergency Response
40+
Years Serving TN
24/7
Emergency Response
5.0
Average Star Rating
100%
Insured & Bonded
What We Do
Commercial cleaning, done to a higher standard
Four specialised divisions, one accountable team. Every program is built around your building, your hours and your compliance requirements.
Construction Cleaning
Post-construction and rough-clean crews that get new builds handover-ready fast.
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Event Cleaning
Pre-event prep, live event porters, and rapid post-event turnaround crews.
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Janitorial Services
Ongoing contract janitorial programs with 24/7 emergency response built in.
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Green certified
USGBC member since inception
Our Approach
Clean buildings shouldn’t cost the planet
Since 1985 we have proven that rigorous commercial cleaning and genuine environmental responsibility are not a trade-off. We use green-certified, low-VOC products and efficient processes that protect your staff, your surfaces, and the air everyone breathes.
- Green-certified, low-VOC cleaning products
- Background-checked, trained and uniformed crews
- Fully insured and bonded on every contract
- Dedicated account manager, one point of contact
- Free no-obligation building walkthrough
Why National Building Service
Four decades of doing it properly
Fully Insured & Bonded
Complete liability coverage on every job, every crew.
USGBC Member
Green cleaning practices aligned with U.S. Green Building Council standards.
24/7 Availability
Round-the-clock emergency response for contract customers.
40 Years In Business
Serving East Tennessee businesses since 1985.
Our Work
On site across East Tennessee
Our crews at work — including stadium and arena turnarounds where thousands of seats have to be spotless before the next gate opens.
Client Reviews
Rated 5 stars by East Tennessee businesses
Taylor Michael
Great company to work with. They keep our offices spotless and are always responsive when we need something extra. Highly recommend them for any commercial space.
Danielle R.
We have used National Building Service for our facility for years. Reliable, thorough, and the crew is always professional. The 24/7 response has saved us more than once.
Marcus W.
They handled the post-construction clean on our build and got it handover-ready ahead of schedule. Not a speck of drywall dust left anywhere.
Sandra K.
Switched to them after our previous cleaners kept missing details. Night and day difference. Our staff notices and comments on it.
James P.
Used them for a large corporate event. The venue was immaculate before guests arrived and completely reset by the next morning. Seamless.
Angela T.
Very happy with the green cleaning approach. Safe products, no harsh chemical smell, and the building still looks and feels genuinely clean.
Coverage
Where we work
Headquartered on E Magnolia Avenue in Knoxville, with crews covering East Tennessee and contract capability across the Southeast.
Knoxville Maryville Oak Ridge Seymour Nashville Chattanooga Memphis Atlanta
Fully insured
Certificates on request
Free Quote
Request your free building walkthrough
Tell us about your building and we will schedule a no-obligation walkthrough, then send a written scope and price — usually within one business day.
Thanks — your request is in. We will call you within one business day.
Questions
Answers before you ask
We serve Knoxville, Maryville, Oak Ridge, Seymour and the surrounding East Tennessee region, plus Nashville, Chattanooga, Memphis and Atlanta for larger contracts.
Yes. We use green-certified, low-VOC products aligned with U.S. Green Building Council standards. They are effective without the harsh chemical residue or odor of conventional cleaners.
Absolutely. Most of our commercial clients prefer evening, overnight or weekend service so their operations are never interrupted. We build the schedule around you.
We are fully insured and bonded. Certificates of insurance are provided before any contract begins, and we can name your organization as additionally insured on request.
We start with a free, no-obligation walkthrough of your building. Pricing is based on square footage, traffic levels, frequency and scope — never a generic per-hour guess.
Yes — 24/7 emergency response is included for regular contract customers. Floods, spills, and incidents are handled around the clock.