Bestopedia Rankings

Best General Contractors in Ontario, California

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

Last updated July 10, 2026

Our Top Pick

Fullmer Construction

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

Verified

  1. Fullmer Construction

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    98 / 100 Trust Score

  2. Hofer Paul B III

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    97 / 100 Trust Score

  3. Baywood Construction Co

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    96 / 100 Trust Score

  4. Theilacker Rudolf Carl Contractor

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    95 / 100 Trust Score

  5. Correa Construction

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    95 / 100 Trust Score

  6. Crossman Steve

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    94 / 100 Trust Score

  7. Barrera Otto Ernesto

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    94 / 100 Trust Score

  8. Cano Architecture Concrete Repair

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    93 / 100 Trust Score

  9. Inter-City Energy Systems Inc

    License standing CLEAR, bonded, workers’ comp current.

    Verified
    93 / 100 Trust Score

  10. K A R Construction Inc

    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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