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At Preferred Maintenance, we take particular pride in our management, supervisory and trained technical staff. What more can be said about a company that still provides cleaning and maintenance services for several prominent medical facilities and other top industries. For over 35 years, our mission has been to offer the most effective combination of people, equipment and materials at a reasonable cost. We guarantee that these same goals will continue to be part of our philosophy and principles for the next 35 years.


At Preferred Maintenance, we take pride in our management, supervisory, and trained technical staff. For 35 years our mission has been to offer the most effective combination of people and materials possible. Our staff is trained to provide a high level of reliable, cost-effective service that is tailored to each client’s particular needs.

Professionally skilled team leaders and supervisors constantly monitor and inspect the work to ensure quality results for quality control.


Small and large office buildings, industrial complexes, medical facilities, banks, educational facilities, and corporate headquarters are among the many accounts we serve.


Trusted service to our clients by skilled technicians is our guarantee of providing top quality performance to our ever-growing list of satisfied clients. These also include Fortune 500 companies, multi-tenant office buildings, manufacturing facilities, clean-room facilities and schools.


“You can trust what we do and we are proud of the word trust.”


For our post construction projects at Danbury Hospital Preferred Maintenance has been performing all of our cleaning services. I have found them to perform outstanding work and are very flexible in meeting our deadlines. 

John S.

Danbury Hospital

Preferred Maintenance has been servicing this manufacturing facility for nearly three years. I would have to say that John and his company are the best cleaning service in my 20 years at Eaton. I never have to ask them to clean this or you missed that. They always stay ahead and do the extra without being asked. 

Eaton Aerospace 

Preferred Maintenance has been servicing the daily cleaning needs at our Danbury facility for three years. During this time, MR. Pereira has been responsive to our needs and requests, often requiring his personnel to go above and beyond normal cleaning activities. No request has been too large or too small for Mr. Pereira’s immediate attention. Customer satisfaction is an apparent number one priority. 

Ken S.

Mannkind Corp

The News-Times is using Preferred Maintenance for all of our cleaning needs at our Main Street Danbury Office and Plant location. Since they have been employed, they have been a pleasure to work with. John is as professional as they come, and his customer service skills are top rate. The plant area is filled with paper dust, ink drippings and spills. But is seems as if no job is too big for the crew at Preferred. We are so happy with our decision to go with Preferred.  They do top quality work, have great customer service skills, and all at a reasonable price. 

John C.

The News-Times

I was so pleased when you were able to continue our service here in New Milford. The service you and your people provide would be difficult to replace. It is so hard to find people who provide services you can count on. The quality of work you and your staff give us is of the highest standard. 

Bonnie I.


Preferred Maintenance was contracted to provide cleaning services for our Facility in  Brookfield, CT. We are very pleased with the quality of their services. They are very professional, reliable and trustworthy. 

Maria H.

STP Products Inc

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