Top Rated Janitorial Service Companies Serving Union City, CA

Name: Cappstone, Inc.
Address: US
Rating: 4.4

If you really care about choosing a quality janitorial service company, we’re here for you. Here’s your access to the best janitorial service companies serving Union City including 94587. These janitors provide high-dusting services and disinfection services, and they also work on bathroom cleaning, dusting and polishing and commercial cleaning. For 22 years we’ve conducted the most accurate ratings and deepest research of local companies, so you’ll be confident in choosing.

Last Updated May 15, 2026
8,451 people sourced companies in Janitorial Services
452 Verified Janitorial Services Customers Surveyed

452

8,451

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Cappstone, Inc.

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Cappstone, Inc. provides managed facility maintenance services for all types of facilities throughout the Bay Area. As a certified Bay Area Green Busi...

Main Services

Janitorial Services

Additional Services

Facility Maintenance Services

Brands

HD Supply White Cap, Waxie

Coverage Areas

San Francisco, Marin County, Sonoma County, Napa County, Contra Costa County, Alameda County, San Mateo County, Santa Clara County

Established in 1989

Commercial Only

Free Quotes & Consultations

Free Estimates

Diamond Certified Video Profile

Janitorial Services - Cappstone, Inc. - San Francisco

Diamond Certified Company Report

Nick Mettler, Owner & Principal

Expert Contributions

313
Rating Surveys

9
Photos
& Videos

5
Researched Articles

Rated Highest in Quality and Helpful Expertise PERFORMANCE GUARANTEED

Quick Connect
(415) 650-2446

Hours CLOSED NOW

License:

JS-LR-1000681295

Diamond Certified Janitorial Service Companies Serve These Union City ZIP Codes

94587

Diamond Certified Janitorial Service Companies In Union City

Diamond Certified janitorial service companies serving Union City are rated an average of 4.2 out of 5 stars based on 325 reviews of 9 rated janitorial service companies.
Diamond Certified janitorial service companies in Union City Avg. Star Rating.

We make you an expert at choosing a high-quality janitorial service company in the Union City area.

For those who love quality local janitorial service companies.

Within our Diamond Certified Resource:

You choose from only top rated Diamond Certified janitorial service companies that serve our Union City area.
You see each company’s deeply researched report from our research.
You get guidance throughout every phase of hiring a local janitorial service company with our Diamond Certified Resource Commercial Office Services Guide.
You get expert guidance from top rated janitorial service companies who are Expert Contributors.
You’re backed by our Performance Guarantee.

You’ll love and refer your friends and family to your new Union City area Diamond Certified janitorial service company. They provide expert services, including day porter services, pressure washing services, vacuuming services, tile and grout cleaning, hard surface maintenance, and more.

To qualify for Diamond Certified, each company must score Highest in Quality and Helpful Expertise (a 90+ on a 100 scale) and pass all our credential-based ratings. Diamond Certified janitorial service companies that serve Union City residents include Cappstone, Inc..

Every Diamond Certified janitorial service company that serves residents in 94587 performs various specialties, including high-dusting services, restroom sanitization, disinfection services, dusting and polishing, and upholstery cleaning.

How to Choose a Quality Union City Janitorial Service Company for Your Family

Click the name of the company to get to their Diamond Certified Company Report page.
Watch their Diamond Certified Video Profile and other videos that we’ve created for you.
Read their verbatim client survey responses and our researched articles.
Get helpful janitorial tips if they are a Diamond Certified Expert Contributor.
Call or email them to schedule an appointment.

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If you love quality local companies, this is for you. Become a Diamond Certified Preferred Member (always free) and get a double performance guarantee, extra guides and tips, our annual Diamond Certified Directory, and more.

Your Diamond Certified Resource. We make you an expert at choosing.

We make you an expert at choosing local companies by giving you the most accurate ratings, deeply researched company reports and Diamond Certified Guide of all Resource Guides, which cover 70+ industries in the Auto, Home, Health and Personal service categories. Each guide contains 16 key articles that are separated into “Before, During and After the Job” tabs. These are written to guide you through each phase of hiring, starting, managing and ending a job in that specific type of service.

Diamond Certified Resource Compared to Crowd-Sourced Review Sites

Diamond Certified Resource’s ratings of local companies are based on surveys of only verified real customers, so they are the most accurate. This beats crowd-sourced review sites like Yelp, Angi or even Google that are plagued with fake, manipulated, cherry-picked and non-customer reviews, which produce inaccurate and often inflated rating scores.

Diamond Certified Resource’s deeply researched reports of top rated Diamond Certified companies include everything you need to see to be very confident in choosing a top rated local company. Each company report includes detailed quality ratings and scoring, verbatim customer survey responses, a profile video, a company story video, a capabilities table, a photo gallery, researched articles, unique expert contributions from the company’s owner, and more. This beats crowd-sourced review sites that solicit companies to “claim their business listing” and add any type of info to their profiles. This sounds good, but it has led to company profiles that are littered with false claims and incomplete info.

Union City was founded in 1909, and today, your 87,496 neighbors enjoy hot tubbing, winemaking, beekeeping, collecting seashells and quilting. Union Citians use Diamond Certified janitorial service companies for kitchen cleaning, commercial cleaning, Green cleaning, tile and grout cleaning, window cleaning, and more.

Frequently Asked Questions for Janitorial Services in Union City, CA

Q: What are clients of Diamond Certified janitorial service companies saying about companies in Union City, CA?

A: Verified Cappstone, Inc. Customer, 1 of 313
"I would recommend them. I'm very satisfied with the work they have done. As far as I'm concerned, they're an eleven out of ten. The quality of their work and their excellent customer service go hand in hand. They're helpful and always answer my questions. " - C. P. S. F.
All Survey Responses for Cappstone, Inc.

Q: What are some of the most popular brands that Diamond Certified janitorial service companies use when working with Union City residents?

A: Diamond Certified janitorial service companies use top-quality brands like Diversified Maintenance Systems, System4 Facility Services, Anago Cleaning Systems, Cintas Corporation and Sodexo.

Q: What types of bathroom cleaning do janitorial service companies offer?

A: Janitorial service companies offer a variety of disinfection services to keep your business safe and sanitary. These services typically include disinfecting frequently touched surfaces such as door knobs, light switches, desks, and countertops; wiping down hard surfaces such as floors, walls, and ceilings; and using specialized sanitizing products on carpeting, furniture, and other soft surfaces. Additionally, janitorial service companies often offer fogging services, which use a powerful, hospital-grade disinfectant to thoroughly sanitize a space in a short amount of time, as well as electrostatic sprayers, which use a charged solution to provide an even coating on hard-to-reach surfaces.

Q: Can Diamond Certified janitorial service companies work with ABM Industries products and similar items so I can get high-dusting services in Union City?

A: Yes, Diamond Certified janitorial service companies in Union City can work with ABM Industries products and similar items to provide high-dusting services.

Q: What did people search for when they wanted to find the best quality janitorial service companies in Union City?

A: Janitorial Services
Green Cleaning
Disinfection Services
Odor Control Services
Carpet Cleaning

Go to Area Guide

Our Union Citian's Guide to Local Quality

Union City is our home and we love it! Here you’ll find the best spots to revisit, the Union City events schedule, local social media links, stories of our Union City area unsung heroes and much more. Connect with your neighbors and share what you love about our hometown. Plus, join us as a Union City Diamond Certified Preferred Member (always free).

This aerial shot showcases Union City’s suburban neighborhoods and surrounding fields. Photo: Rob

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