Bestopedia Rankings

Best Plumbers in Union 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. Dynamic Technical Solutions

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    100 / 100 Trust Score

  2. Qualified Plumbers Services Inc

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    100 / 100 Trust Score

  3. Chou Andrew Chih-Ping

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    96 / 100 Trust Score

  4. Plumbing Masters

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    96 / 100 Trust Score

  5. Plumbing Connection

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    96 / 100 Trust Score

  6. Cal-Tech Plumbing Co

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    96 / 100 Trust Score

  7. Chou Property Management Corp

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    90 / 100 Trust Score

  8. Bayvalley Mechanical Inc

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    86 / 100 Trust Score

  9. Absolute Pro Plumbing Inc

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    85 / 100 Trust Score

  10. Next Level Plumbing Services

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    85 / 100 Trust Score

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

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