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Diamond Certified Resource is your guide to quality local companies and expert advice.
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NEW! Use our FIND A QUALITY COMPANY WIZARD to expertly choose a quality company.
Why Choose a Diamond Certified Company?
We’ve all felt the joy of choosing a good local company and, unfortunately, the pain when we mistakenly choose a bad one. The problem is, every company claims to be good, yet despite these glowing claims some provide inconsistent quality while others are downright unscrupulous.
The Diamond Certified Difference
We’ve solved this problem for you with the Diamond Certified Resource. Only local companies independently rated Highest in Quality and Helpful Expertise® earn Diamond Certified. Our rigorous rating and certification process starts with the in-depth pass/fail rating of each company’s customer satisfaction, license and insurances. Most companies can’t pass our rating and earn Diamond Certified, and every Diamond Certified company must continue to deliver on its promises to you, the consumer. That’s why we conduct ongoing customer satisfaction research and credential-based ratings and monitor each company’s performance. Read More
Find Top Rated Companies in the San Francisco Bay Area
If you really care about choosing a quality local company, we’re here for you. Here’s your access to the best local companies serving the San Francisco Bay Area. For 22 years we’ve conducted the most accurate ratings and deepest research of local companies, so you’ll be confident in choosing.
Diamond Certified Resource Blog
Watch this 30-second video about the release of the 2025 Diamond Certified Directory.
Tips From Top Rated Experts
Deeply researched company reports. Essential articles, video profiles, key factors and more.
We Make You an Expert at Choosing Local Companies
Find Local, Top
Rated Companies
Discover the highest rated companies in your local area, regardless of your service needs. All Diamond Certified companies are backed by a Performance Guarantee. Search for companies by location or industry category.
Use Our Guides, Resources & Blog
Access our homeowner guides, resources and blog for a deep dive into everything you need to know about before, during, and after the job. Read this before you even start looking for a company to handle your service needs.
Our Rating & Certification Process
We take pride in our 12-step certification process, which ensures that every Diamond Certified company is rated Highest in Quality and Helpful Expertise.
Become a Diamond Certified Preferred Member
With our ALWAYS FREE preferred membership, you'll gain benefits that help you become an expert at choosing local companies for all your service needs. Plus, you'll have access to our 24/7 hotline any time you need support or guidance.