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Diamond Certified

Diamond Certified

The Diamond Certified mission is to define excellence and identify for consumers the highest quality local companies. The three founders, Jim Stein, Greg Louie and Guy Sherman, have decades of experience rating and certifying local service and professional firms on behalf of consumers. Their entire team is dedicated to ensuring you have confidence in the companies you choose.

Diamond Certified is totally committed to performing all ratings and ongoing certification work with the highest integrity and accuracy. They believe:

  • You the consumer have the right to know which companies are truly performing at the highest level of quality.
  • The highest quality companies should be rewarded for their ongoing performance through public recognition. 
  • Companies should be held accountable for their performance, one customer at a time.

They do not allow an unlimited number of companies to earn Diamond Certified. In fact, only a handful of companies can qualify in most industries, and these they re-rate on an ongoing basis to assure you that they stay the best. And, of course they stand behind each Diamond Certified company with their own guarantee.

Click here to read our Diamond Certified Profile Page
Click here to read our Diamond Certified Comments Page

Certification Process

  • APPLY: Companies must apply to be certified.
  • SAMPLE: A random sample of up to 400 past customers is pulled from all customer files of the applicant.
  • SURVEY: A confidential telephone survey captures the customer satisfaction score based on quality.
  • TABULATION: The survey results are tabulated. Companies must score greater than 90 on a 100 scale.
    "Rigorous Standards are Enforced"
  • CREDENTIALS: The applicant company’s credentials are independently rated (license, insurance, complaint status and credit for contractors).
  • PRACTICES: Are the company’s business practices "customer friendly"? It must stand behind its performance.
    "Only the Highest Pass"
  • AGREEMENT: The company agrees to adhere to the Diamond Certified Customer Satisfaction Principles.
  • AWARD: If quality & credential ratings, and business practices qualify, company is awarded Diamond Certified.
    "Ongoing Customer Satisfaction and Performance is Required"
  • MONITORING: Credentials and complaints are monitored quarterly, and additional ongoing customer surveys are completed.
  • MEDIATION: If ever necessary, the company participates in Diamond Certified mediation.
  • GUARANTEE: A limited guarantee ensures performance.
  • QUALITY: The Company participates in the ongoing elite Diamond Certified Quality Satisfaction Program.