Bestopedia Rankings

Best Plumbers in Foster City, California

Ranked by the Bestopedia Trust Score, drawn from verified CSLB license, bond, and workers’-comp records. Rankings are earned — never for sale.

Last updated July 8, 2026

  1. Star Plumbing & Fire Construction Co

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    100 / 100 Trust Score

  2. Water Heater Specialists

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    100 / 100 Trust Score

  3. Dinelli Plumbing Incorporated

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    100 / 100 Trust Score

  4. Magnum Construction Group Inc

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    99 / 100 Trust Score

  5. Ness Plumbing and Backflow

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    96 / 100 Trust Score

  6. Mcmahon Plumbing Inc

    CLEAR license standing, bond not current, workers’ comp current.

    LISTED
    85 / 100 Trust Score

  7. Zack's Plumbing

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    84 / 100 Trust Score

  8. Everclear Plumbing & Drain LLC

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    83 / 100 Trust Score

  9. Water Heater Service

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    82 / 100 Trust Score

  10. Line Up Group Inc

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    81 / 100 Trust Score

noun /best-oh-PEE-dee-uh/

a curated ranking of the best in any category, based on independent review.