Business Details
37 Years
experience
Professional Commercial Cleaning Services Knoxville
Founded in 1989 by Gary Duncan, our company has built a legacy of excellence in commercial cleaning services across Knoxville, Tennessee, and surrounding regions. We prioritize relationships with clients and staff alike, driven by core values of honesty, integrity, and a heart for service. With over three decades of experience, we specialize in janitorial services, floor care, building maintenance, and upholstery cleaning tailored to diverse facilities including corporate offices, medical centers, educational institutions, and manufacturing facilities. Our team of trained professionals utilizes industry-leading equipment and techniques to deliver consistent, reliable results while maintaining a commitment to innovation and community impact. As a locally owned business, we take pride in hiring and supporting local talent, ensuring our services contribute to the economic growth of the communities we serve.Our partnership with Clean Team, a national leader in janitorial services, enhances our capabilities while maintaining personalized attention to client needs. We have earned recognition as Cityview Magazine's Gold Winner for Cleaning Services for seven consecutive years, reflecting our dedication to exceeding customer expectations. Through challenges like the pandemic, we adapted by expanding disinfectant services while keeping employees working and businesses operational. Today, under President Sheri Henegar's leadership, we continue to grow while upholding the foundational principles that have sustained us for over 35 years.
Services
Janitorial Services
Floor Care
Building Maintenance
Upholstery Cleaning
Carpet Cleaning
Tile & Grout Cleaning
Post-Construction Cleaning
Day Porter Services
Hard Surface Care
Security Checks
Details
- Year established: 1989
Highlights and features
- We offer 35+ years of experience in commercial cleaning services across East Tennessee.
- Our locally owned business prioritizes hiring and supporting community-based employees.
- We maintain a proven track record of winning Cityview Magazine's Best of the Best award.
- Our partnership with Clean Team enhances service capabilities while ensuring local accountability.
- We implemented pandemic-era disinfectant services while maintaining employee job security.
Associations and certifications
- Building Service Contractors Association International (BSCAI)
What people say
Amazing company
Quality of their work
Honest people
Hardworking
10/10 recommend
Services
Janitorial Services
Our janitorial services provide comprehensive cleaning solutions for commercial facilities of all sizes. From daily maintenance to specialized cleaning tasks, we offer customizable schedules including part-time visits, full-time day porters, and after-hours crews. Our trained staff handles sweeping, vacuuming, restroom sanitation, glass cleaning, and supply management while accommodating client preferences for visibility or discretion. With partnerships enabling cost-effective supply procurement, we deliver turnkey solutions that let businesses focus on their core operations.
Floor Care
We specialize in maintaining all flooring types including carpets, hardwood, tile, and vinyl composite tile (VCT). Our services include IICRC-certified carpet cleaning using hot water extraction and encapsulation methods, tile and grout deep cleaning with patented tools, and VCT stripping/waxing to restore shine. Advanced equipment like the Butler Truck Mount System ensures quick drying times while improving indoor air quality through effective contaminant removal. Regular maintenance programs help extend flooring lifespan and maintain professional aesthetics.
Building Maintenance
Our building maintenance services prevent minor issues from escalating into costly repairs. We handle light plumbing, electrical work, ceiling tile cleaning, de-icing, and small-scale painting projects. By creating customized maintenance plans aligned with client schedules, we ensure facilities remain operational and presentable. This proactive approach reduces downtime and supports productivity while addressing both routine and emergency maintenance needs across diverse commercial environments.
Upholstery Cleaning
We offer professional upholstery cleaning for commercial furniture including sofas, office chairs, and lounge seating. Using manufacturer-recommended solutions and Wool Safe-certified methods, our technicians safely clean delicate fabrics like microfiber and linen. The process removes embedded allergens and bacteria while preserving fabric integrity. Regular cleanings improve indoor air quality, extend furniture lifespan, and maintain professional appearances in high-traffic business environments without requiring furniture replacement.
Carpet Cleaning
Our carpet cleaning services combine the Butler Truck Mount System for deep steam cleaning and the Brush Pro Dry Cleaning system for low-moisture environments. Both IICRC-certified methods effectively remove contaminants while accommodating facility schedules. The hot water extraction process reaches 220-240F for sanitization, while the dry cleaning system allows same-day use of spaces. We also provide maintenance guidance to help clients preserve carpet quality between professional cleanings.
People
Sheri Henegar
President
Leading Duncan & Sons since 2015, Sheri focuses on employee satisfaction and client needs. She emphasizes joy in the workplace while maintaining the company's founding values of integrity and service.
Mark Woods
Operations Partner
With a career progression from field roles to leadership, Mark specializes in problem-solving. He brings hands-on experience to operations management while pursuing personal interests in mechanical projects.
Anne Freeman
Administrative Partner
Anne has contributed to Duncan & Sons' administrative excellence since 2005. She balances organizational responsibilities with a passion for travel and local culinary experiences, applying her attention to detail in both work and personal pursuits.
Jesse Carpenter
Customer Care Manager
Managing customer relations since 2016, Jesse combines family values with a service-oriented approach. His background in field operations informs his responsive management style while balancing responsibilities as a father of thirteen children.
Rebekah Rankin
Recruiting & Hiring Manager
Sherri focuses on talent acquisition since 2017, connecting community members with employment opportunities. She combines personal interests in interior design with professional responsibilities to build a skilled local workforce.
Questions
What areas do you service?
We serve the Greater Knoxville area, East Tennessee, and Salt Lake City, Utah with commercial cleaning and maintenance solutions.
Do you offer customized cleaning schedules?
Yes, we provide flexible scheduling options including weekly visits, daily crews, full-time day porters, and after-hours services tailored to client needs.
Are your technicians certified?
Our carpet cleaning technicians hold IICRC certifications, and all staff receive ongoing training to maintain industry best practices.
What facility types do you service?
We clean and maintain churches, corporate buildings, medical facilities, educational institutions, offices, manufacturing plants, and warehouses.
How do you handle emergency maintenance requests?
While we don't offer 24/7 emergency services, we prioritize urgent maintenance needs during regular business hours and coordinate rapid response plans.
Can you assist with post-construction cleaning?
Yes, we provide comprehensive post-construction cleaning services to prepare facilities for occupancy, including debris removal and detailed surface cleaning.
Reviews (6)
Benjamin Parks-Dalton
Jan 02, 2022
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Critical:Professionalism,Quality,Responsiveness,Value
Dont work for Duncan & Sons, They dont care about their employees at all. All they care about is money in their pockets!! Horrible Management & Job Training! Pay is Horrible & No Advancement Opportunity! Dont waste your time working for them.
Dont work for Duncan & Sons, They dont care about their employees at all. All they care about is money in their pockets!! Horrible Management & Job Training! Pay is Horrible & No Advancement Opportunity! Dont waste your time working for them.
Tiffany Starling
Dec 29, 2021
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I do NOT recommend that you work for them. They pay terribly and you can never get ahold of a manager. My manager would say she called me when she didnt and would say I never called when I did In fact call. She told me people said things they never said. Anytime I would ask for something I would either never get it or get it a week later. She would also never communicate with me directly, she would tell my friend to tell me things. I was there close to two months and it was hell. A lot of the people you clean for dont respect you. Dont listen to what Jon tells you about Duncan being a
Sherri Maynard
Dec 07, 2021
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Positive:Professionalism,Quality,Responsiveness,Value
The company mission and culture inspires people to be their best. I have been in the work force for 43 years and I have never been treated better or been more valued. Im about to celebrate my 5th year and it is my intention to work for Duncan and Sons until I retire.
The company mission and culture inspires people to be their best. I have been in the work force for 43 years and I have never been treated better or been more valued. Im about to celebrate my 5th year and it is my intention to work for Duncan and Sons until I retire.
Melanie Burns
May 24, 2021
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Positive:Professionalism,Quality,Responsiveness,Value
Great place to work. Pay is good too for new employees
Great place to work. Pay is good too for new employees
Melissa McCourt
Jan 31, 2021
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I actually prayed to get this job and was beyond thankful when they offered me the job. The hiring manager Sherri was sweet as can be and made me think she was being "completely transparent" her words about the job. The 1st week I was on the job was the most physically demanding job I had ever done. I cleaned 4br houses and apartments before this. Sherri said the job was easy. It wasn't the last day of my 1st week I had pushed myself so much to prove myself to this company I almost passed out from over exertion. 7 days in and my alternator went out on my car I wasnt able to get to work. The manger
Bronson Smith
May 13, 2020
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This company treats their employees like dirt, and kicks them while they're down. I watched how they made one guy do a 3 man job by himself and paid him poorly. He continually asked for help, the people at the office didn't even know that their contract that they established with the company i work for, required 2 or more employees on the job. They finally sent the guy some help, he got sick about a month later and they took him off the job. The very next day the manager came in trash talking the guy that had worked so hard for them. They completely destroyed that guys image. Almost everyone in
