Bestopedia Rankings

Best General Contractors in Castro Valley, California

Ranked by the Bestopedia Trust Score, computed from CSLB license, bond, and workers’ compensation records.

Last updated July 10, 2026

Our Top Pick

Langon John J Jr

Trust Score 98/100. License standing CLEAR, bonded, workers’ comp current.

Verified

  1. Langon John J Jr

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    98 / 100 Trust Score

  2. Knuppe H James

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    97 / 100 Trust Score

  3. Paragon Electric

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    96 / 100 Trust Score

  4. Direct Sales Floors

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    96 / 100 Trust Score

  5. Northup Construction Inc

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    94 / 100 Trust Score

  6. Croll Edwin T

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    94 / 100 Trust Score

  7. Olson Jack D Design & Construction Co

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    94 / 100 Trust Score

  8. Huska Kelly Contracting

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    94 / 100 Trust Score

  9. Complete Const Co

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    94 / 100 Trust Score

  10. Reed's Craftmanship

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    93 / 100 Trust Score

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

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

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