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We make you an expert at choosing local companies!

Find Diamond Certified companies rated Highest in Quality and Helpful Expertise. Performance Guaranteed.

Diamond Certified Resource is your guide to quality local companies and expert advice.


Why Choose a Diamond Certified Company?

Watch this video on the Diamond Certified Resource: the best way to find local companies rated Highest in Quality and Helpful Expertise®. Companies must score 90+ on a 100 scale and pass all our credential-based ratings. By requiring such a high score to qualify, we cut out mediocre and poorly performing companies.

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

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Looking for Outdoor Fun in San Francisco?

I’ve lived in San Francisco for a long time and I’m still discovering its natural beauty. Our wonderful Recreation & Parks Department has published a list of 100 fun things to do in nature put together by San Francisco Children & Nature. The suggestions are free, which is great for San Francisco residents and visitors alike. 

The suggestions are divided up by areas: southwest, southeast, northwest and northeast. Here are some of the ideas that I like best: walk around Mission Creek to look for birds, hug a redwood tree (our state tree) at the base of the Transamerica Pyramid, look for squirrels at Candlestick Point State Recreation Area, watch the hang gliders from the cliffs at Fort Funston, practice your balance at the new Presidio Tunnel Tops Outpost or catch skateboarders at Balboa Skatepark. One of my personal favorite things to do is explore the urban forest on top of Mount Davidson. Did you know that at 938 feet, it’s the highest point in San Francisco? It’s named after the geographer who surveyed it. Don’t forget your hiking shoes and walking sticks!  

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Tips From Top Rated Experts


Adam Garza

San Jose Plumbing, Inc.
Plumbing Pride

Amie Prendergast

Hassler Heating & Air Conditioning, Inc.
Relational Rewards

Bill Shepherd

Shepherd's Plumbing Heating and Air Conditioning, Inc.
A Plumbing Affinity

Cindy Faulkner

Valley Heating, Cooling, Electrical and Solar
A Natural Transition

We Make You an Expert at Choosing Local Companies

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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.

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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.

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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.

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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.