diamond certified company certificate

Companies must pass rigorous rating standards to earn Diamond Certified. Photo: American Ratings Corporation ©2019

Welcome Aboard!

We’re pleased to announce that the following companies have recently been awarded Diamond Certified. That means they’ve passed our rigorous 12-step ratings process and scored Highest in Quality and Helpful Expertise®.


Home Pavers

(408) 498-7968


Services Performed: Interlocking Paving Stone Installations, Hardscapes, Driveways, Patios, Retaining Walls, Pool Decks

Areas Served: Serving the Bay Area


RM Construction

(415) 534-5497


Services Performed: Residential and Commercial Remodeling

Areas Served: Serving Marin County and San Francisco


Build SF, Inc.

(415) 992-3027


Services Performed: Residential Remodeling, Design/Build, Structural and Specialty Finish Concrete, Construction and Site Management, Historical Restorations

Areas Served: Serving the Bay Area


Happy they chose Diamond Certified companies

home frame

Thompson Construction is rebuilding this home that was destroyed by the 2017 Tubbs Fire. Photo: Thompson Construction ©2019

Earlier this year, we heard from Nancy and Jack Finney, whose furnace went out right before Christmas. They were having trouble finding an HVAC company that would fix it, not only because of the holidays but also because the furnace was about 100 years old! The Finneys then called Carol Flynn, Inc. Nancy writes that the technician who came out “had never seen a furnace like this but gamely went to work.” The technician eventually got it running again, and the Finneys are “grateful to have heat to get through these cold days.”

Leon from San Mateo also ran into furnace trouble this winter. He used the Diamond Certified Directory to find Ortiz Heating and Air Conditioning and was impressed by their professionalism. “Alex Ortiz is an outstanding business owner,” Leon writes, “and his employees did outstanding work installing my furnace.”

Lastly, we received a heartfelt message from Dina, who lost her Santa Rosa home in the 2017 Tubbs Fire. She hired Thompson Construction to rebuild her home from scratch. Reflecting on her experience with them, Dina writes, “Thompson Construction offers excellent customer satisfaction. I highly recommend them to anyone looking to build a new home.”

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