Diamond Certified Resource Welcomes Four New Top Rated Companies in August 2026

Based on a large survey of only verified customers, only companies rated Highest in Quality and Helpful Expertise^® earn the prestigious Diamond Certified award.

PETALUMA, Calif., Aug. 27, 2026 /PRNewswire/ -- Diamond Certified Resource has announced that four companies earned the prestigious Diamond Certified award in August 2026 by scoring Highest in Quality and Helpful Expertise: Agama Painting, EBA Roofing Inc., Keith Roofing Company and Valiant Garage Door.

The Diamond Certified Research Team's methodology ensures only a large, random sample of verified customers are surveyed, which produces the most accurate ratings of local companies available. The team conducts a 12-step rating and certification process that identifies companies delivering high quality and Helpful Expertise to their customers. The process includes collection of a large, random sample of customers; confidential telephone and email surveys of real customers; and verifications of state licenses, insurance, and business practices.

The research team produces a final Diamond Certified Research and Ratings Report. Only companies scoring 90 or above on a 100 scale are rated Highest in Quality and Helpful Expertise and earn Diamond Certified. If a company falls short of these standards, it does not earn Diamond Certified, regardless of how much it's willing to pay. Qualified companies agree to follow the Diamond Certified Customer Satisfaction Principles and participate in mediation if needed, and they're backed by the Diamond Certified Performance Guarantee. Ongoing surveys and monitoring help ensure continued high customer satisfaction by Diamond Certified companies.

"Earning Diamond Certified is a meaningful achievement because most companies can't qualify," says Greg Louie, founder and CEO of American Ratings Corporation, creator of Diamond Certified Resource. "These four companies have demonstrated the quality, Helpful Expertise and customer commitment required to earn the prestigious award."

Every Diamond Certified Research and Ratings Report includes detailed statistical results (such as average satisfaction scores and response distributions), verbatim customer survey responses and visual charts that clearly present the findings. "Our Report shows each customer's rating on a 1 - 10 scale of the company's quality, whether they would hire the company again, if the company provided Helpful Expertise and verbatim answers to open-ended survey questions, which adds context to our research-grade report," says David Pak, Director of Ratings at American Ratings Corporation.

Here's more information about the four companies that earned Diamond Certified in August 2026:

Agama Painting
Agama Painting provides a variety of interior and exterior painting services for residential and commercial clients in Alameda and Contra Costa Counties. In addition to preparing and painting all types of surfaces, the company has the training and equipment to handle specialized work like cabinet refinishing, deck power washing and staining, and more.

EBA Roofing Inc.
EBA Roofing Inc. provides a wide range of roofing services for residential and commercial clients in Los Angeles, Ventura, and Orange Counties. In addition to installing and repairing all types of roofing systems (with special expertise in high-pitched roofs), the company is qualified to apply commercial roof coatings that are designed to seal leaks and reflect heat.

Keith Roofing Company
Keith Roofing Company inspects, repairs, and replaces roofs for residential and commercial clients in Santa Cruz, San Francisco, San Mateo, Santa Clara and Alameda Counties. The family-owned and operated company is qualified to work on all types of roofing systems, from composition shingle and wood shake to tile and slate, and it can also apply silicone and acrylic coatings that help prevent leaks and reflect heat.

Valiant Garage Door
Valiant Garage Door repairs and maintains all types of garage doors for residential and commercial clients throughout the Tri-Valley area. The company has the training and equipment to handle everything from basic spring replacements to custom garage door opener installations, and it also offers 24/7 emergency services for the convenience of its customers.

It's easy to find top rated companies in the San Francisco Bay Area and Other Areas on Diamond Certified Resource.
Alameda County
Contra Costa County
El Dorado County
Fresno County
Los Angeles County
Marin County
Milwaukee County
Monterey County
Napa County
Orange County
Placer County
Sacramento County
San Benito County
San Francisco
San Joaquin County
San Mateo County
Santa Clara County
Santa Cruz County
Solano County
Sonoma County
Yolo County
Yuba County

About American Ratings Corporation
American Ratings Corporation (ARC), the creator of Diamond Certified Resource, the source for consumers who love quality local companies, rates local companies by surveying only their verified real customers to produce the country's most accurate ratings of local companies. It also creates deeply researched company reports and consumer guides that give consumers the best companies plus the best advice for choosing a local Auto, Home, Health or Personal service type of company.

Only companies rated Highest in Quality and Helpful Expertise^® earn Diamond Certified and are backed by their Performance Guarantee. All their deeply researched reports and guides are available for free at diamondcertified.org. They also produce an annual, full-color, printed Diamond Certified Directory with 840,000 copies published in 9 geographic zones in the Greater San Francisco Bay Area. Each April, these are mailed for free to their 182,000 Diamond Certified Preferred Members and selected homeowners and companies.

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SOURCE American Ratings Corporation