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You are the customer. If your goal is to choose a business that will deliver high customer satisfaction and quality, you'll feel confident in choosing a Diamond Certified company. Each has been rated Highest in Quality in the most accurate ratings process anywhere. And you're always backed by the Diamond Certified Performance Guarantee.
More than 200,000 customers of local companies have been interviewed in live telephone calls, and only companies that score Highest in Quality in customer satisfaction (a 90+ on a 100 scale) and pass all of the credential-based ratings earn Diamond Certified. By requiring such a high score to qualify, the Diamond Certified Program eliminates mediocre and poorly performing companies. Read detailed information about the ratings and certification process.
Serving Alameda, Contra Costa, San Mateo and Santa Clara Counties
Serving the Greater San Francisco Bay Area
Serving the Greater Bay Area including Marin, Sonoma, San Francisco, Alameda, Contra Costa, San Mateo and Santa Clara Counties
Serving Santa Clara County including San Jose, Santa Clara, Sunnyvale, Mountain View.
Serving all of San Mateo County including Daly City, San Mateo, Redwood City, South San Francisco, San Bruno, Pacifica, Belmont and East Palo Alto.