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34 Years
experience
Your Trusted Partner for Janitorial & Maintenance Services in Burlingame, CA
Preferred Building Service has been delivering comprehensive janitorial and maintenance programs since 1992, prioritizing quality, consistency, and client satisfaction. Our founders, Gregory Dellanini and Robert Squeri, established the company with a vision to adapt to industry changes while maintaining sustainability and core values. We emphasize preventative maintenance, conducting regular inspections and generating quality control reports to address issues proactively. Our three-tier training program ensures employees are proficient in safety protocols, green cleaning, and facility-specific requirements. By fostering a positive work environment, we empower our team to deliver unmatched service at every level.

We specialize in commercial cleaning, floor restoration, carpet care, and specialized services like pressure washing and construction clean-up. Our clients include office buildings, schools, medical facilities, and retail spaces, reflecting our adaptability to diverse environments. As a female-owned small business, we remain committed to personalized service and community values. Our executive team oversees operations directly, eliminating third-party supervision to maintain accountability. With decades of experience, we continue to uphold our founding principles of reliability, responsive communication, and impeccable quality.
Services
Janitorial Services Commercial Cleaning Sanitizing Services Floor Refinishing Carpet Cleaning Window Cleaning Pressure Washing Graffiti Removal Construction Clean-Up Handyman Services
Details
  • Year established: 1992
Highlights and features
  • We offer 30+ years of experience in commercial janitorial services.
  • Our three-tier training ensures expert safety and quality compliance.
  • We conduct regular preventative maintenance inspections with detailed reporting.
  • Direct executive oversight eliminates third-party supervision inefficiencies.
  • Specialized services for diverse property types including medical facilities and tech campuses.
What people say
Best janitorial company Very receptive to customizing services Quick to respond Best company I've worked with Highly recommend
Services
Janitorial Services
Our janitorial services provide comprehensive cleaning solutions for commercial properties, ensuring hygienic environments and operational efficiency. We tailor programs to facility size and industry needs, focusing on high-traffic areas and sanitation standards. With direct executive oversight, we maintain consistent quality across all service levels.
Floor Refinishing
Specialized floor refinishing restores tile, hardwood, and concrete surfaces to like-new condition. Our technicians use industrial-grade equipment and eco-friendly solutions to address wear, stains, and damage. Regular maintenance extends flooring lifespan while maintaining aesthetic appeal for commercial spaces.
Construction Clean-Up
We remove debris, dust, and residue after construction projects, preparing spaces for occupancy. Services include window cleaning, vacuuming, and sanitizing surfaces to meet occupancy standards. Our team works efficiently to minimize downtime for business owners.
Carpet Cleaning
Using advanced extraction methods, we deep-clean carpets and upholstery to eliminate allergens and stains. Our treatments prolong fabric life while improving indoor air quality. We accommodate commercial schedules with minimal disruption to daily operations.
Pressure Washing
High-pressure washing removes grime, mold, and contaminants from building exteriors, sidewalks, and parking areas. This service enhances curb appeal and prevents surface degradation. We use environmentally safe detergents for effective, sustainable results.
People
Gregory Dellanini
Co-Founder
Co-founded Preferred Building Service in 1992, focusing on sustainable growth and industry adaptation. Prioritizes direct oversight and employee development to maintain service excellence across commercial properties.
Robert Squeri
Co-Founder
Co-founder with Gregory Dellanini since 1992, Robert Squeri established operational frameworks emphasizing quality control and client satisfaction. Advocates for employee training and preventative maintenance strategies to ensure long-term reliability.
Questions
What services does Preferred Building Services offer?
We provide janitorial services, commercial cleaning, floor refinishing, carpet cleaning, pressure washing, graffiti removal, construction clean-up, and specialized maintenance programs.
What property types do you service?
We serve office buildings, schools, medical facilities, retail spaces, auto dealerships, theaters, and tech campuses among others.
How does your quality control process work?
Our Site Managers conduct regular inspections, generate quality control reports, and address issues immediately with on-site custodians.
Are your employees trained?
Yes, we use a three-tier training program covering safety protocols, green cleaning, and facility-specific requirements.
Is your company locally owned?
Yes, we're a female-owned small business based in Burlingame, CA since 1992.