Principal Building Services (PBS) is a full service Janitorial/Facilities Company that was established on a simple belief that quality workmanship and open communication are the keys to true customer satisfaction. Principal Building Services is a consumer-oriented firm offering a full range of cleaning, maintenance, restoration and specialty services throughout the Tri-state Area, Massachusetts, New Hampshire and Colorado. With our experienced managerial and front-line staff, state-of-the-art equipment and commitment to top-notch service, Principal Building Services will maintain your institutional, industrial, commercial and retail environment to the highest standards.