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From $50
Up to $500
Closed until Mon, 8:00 AM
In the bustling cityscape of Diamond Bar, we are Solution 1 Building Services Inc., a dedicated janitorial service. We understand that maintaining…
The Best Janitorial Company in Diamond Bar
Compare top-rated janitorial providers in Diamond Bar. Profiles include verified reviews, service details, and direct contact options.
Service providers
Janitorial pros near Diamond Bar
These companies are based in nearby cities and serve Diamond Bar.
From $50
Up to $500
Closed until Mon, 10:00 AM
At C.J.S Janitorial Service in Pomona, we take pride in delivering exceptional janitorial services that keep your commercial spaces clean and hygi…
From $50
Up to $500
Open 8:00 AM – 6:00 PM
In the heart of Pomona, we are Aroma Pro Cleaning Services, your reliable partners in maintaining a spotless home. Specializing in Janitorial Serv…
From $50
Up to $500
Closed until Mon, 9:00 AM
In San Dimas, we are All-Pro Enterprises, Inc., your reliable partner in maintaining a clean and healthy home environment. Specializing in Janitor…
From $50
Up to $500
Closed until Mon, 10:00 AM
At Clear Cut Commercial Cleaning in Chino Hills, we specialize in providing comprehensive janitorial services for businesses. Our team is dedicate…
From $50
Up to $500
Closed until Mon, 8:00 AM
At Briteworks Inc. in Covina, we understand the challenge of maintaining a clean and hygienic home. We are a dedicated Janitorial Service, offerin…
From $50
Up to $500
Closed until Mon, 8:00 AM
At Herber Cleaning in Montclair, we take pride in our comprehensive janitorial services. Our team is dedicated to keeping your spaces clean and sp…
From $50
Up to $500
Open 9:00 AM – 5:00 PM
In the heart of Chino, we are Jemay Cleaning Service - your reliable partner in maintaining spotless homes. We specialize in comprehensive Janitor…
From $50
Up to $500
Closed until Mon, 8:00 AM
In the heart of Yorba Linda, we are Jet Clean Janitorial Inc – your dedicated home services partner. For years, we've been committed to maintainin…
From $50
Up to $500
Open 24/7
At Azusa's LCS Cleaning Services, we pride ourselves on providing comprehensive janitorial services tailored to your home. We understand that a cl…
From $50
Up to $500
Closed until Mon, 7:00 AM
In the bustling cityscape of Azusa, we are Ultimate Cleaning Service - your trusted partner in maintaining a spotless home. We specialize in profe…
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Verified Janitorial in Diamond Bar, CA
We show only active businesses that pass moderation. Results are specific to Diamond Bar and nearby service areas, and inactive profiles are removed to keep the list current.
Real reviews for janitorial
Ratings and reviews come from customers who used the service. Compare janitorial pros in Diamond Bar by experience, responsiveness, and value before you reach out.
Local-first search in Diamond Bar
Filter by neighborhood, check locations on the map, and find providers close to home or work in Diamond Bar. Listings are refreshed regularly — October 2026.
Within reach of Diamond Bar, CA
The same listings in the closest cities — providers there often take jobs in Diamond Bar too. Mileage is the approximate distance from Diamond Bar.
Getting started in Diamond Bar, CA
Looking for janitorial in Diamond Bar? This page lists verified local providers with ratings, reviews, and contact options. We show active businesses only — profiles are moderated and updated by owners.
Compare pros by experience, price range, and customer feedback. Many providers offer free estimates or same-day service for common requests. Use filters and the map to find someone close to your address.
Before you hire
- Read the most recent reviews for your specific type of job.
- Ask about licensing and insurance when required for this trade.
- Get a written estimate for work over a few hundred dollars.
- Confirm availability and any trip or emergency fees upfront.
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Latest Janitorial reviews in Diamond Bar
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Heriberto Cardenas
We hired Solution 1 Building Services for a deep post-pest control cleaning, and they exceeded our expectations. After our pest extermination, we were highly concerned about toxic chemical residues and hidden biological waste. The crew from Solution 1 arrived promptly and tackled the space with meticulous detail. They deep-cleaned baseboards, sanitized food-preparation surfaces, and used HEPA vacuums to clear out all dust and pest debris. The property smells incredibly fresh and feels completely safe for occupancy again. Their team was professional, knowledgeable about post-treatment safety, and exceptionally thorough. Highly recommended for any commercial or residential remediation cleaning needs.
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Fidel Zabalza
Solution 1 Building Services provided exceptional post-construction cleaning for over 400 apartment units. Delivering high-quality, reliable results. Their team efficiently handles massive projects, ensuring meticulous detail in removing dust and debris, making them a trusted partner for turning over clean, move-in-ready units on time. Barza Construction Sylmar CA
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E Hall
Solution 1 is consistently timely, reliable, and quick to respond to emergencies at our business locations. All their staff are experienced and knowledgeable, delivering excellent daily service. They offer a wide range of solutions—from basic janitorial work and Day Porter services to carpet cleaning, floor waxing, and exterior power washing. I highly recommend them to any business looking for a dependable, responsive, skilled, and comprehensive janitorial partner.
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Steve Holmes
We have been extremely pleased with the service provided by Solution 1 Building Services. They consistently do a tremendous job, are reliable, professional, and pay close attention to every detail. Everything is completed with precision and care, and it truly shows in the quality of their work. In the past, I always looked for the cheapest solution, but I was never fully satisfied with the results. With Solution 1, not only are their rates reasonable, but the level of service feels truly five-star. It’s hard to find a company this dependable and committed to excellence. I highly recommend Solution 1 Building Services to anyone looking for top-notch cleaning and maintenance services!
