The 10 Best Builders in Cardiff 2026

Ranked by real customer reviews, FMB accreditation status and Companies House verification. Updated weekly from public sources.

How this ranking is calculated

Composite score from real, publicly-verifiable signals only:

  • Google Business Profile star rating (when 3+ reviews)
  • Google Business Profile review count (log-scaled)
  • Verification sources: Companies House number, Google Business listing, Checkatrade, TrustATrader, claimed website
  • Operator-claimed listing status

No paid placement. No accepted listings. No fabricated reviews. Source data refreshed weekly.

  1. Rise Construction Cardiff Ltd is a builder in Cardiff, rated 5/5 from 18 Google reviews. Registered with Companies House (no. 13963156) and currently active. Verified Google Business Profile.

    5.0โ˜… (18 reviews)3 verification sources
    5.0โ˜…
    18 reviews

  2. Gentles Construction Ltd is a builder in Cardiff, rated 5/5 from 16 Google reviews. Registered with Companies House (no. 06819668) and currently active. Verified Google Business Profile.

    5.0โ˜… (16 reviews)3 verification sources
    5.0โ˜…
    16 reviews

  3. Sonabuild is a builder in Cardiff, rated 5/5 from 14 Google reviews. Registered with Companies House (no. 15491958) and currently active. Verified Google Business Profile.

    5.0โ˜… (14 reviews)3 verification sources
    5.0โ˜…
    14 reviews

  4. Sphinx Constructions Ltd is a builder in Cardiff, rated 4.9/5 from 9 Google reviews. Registered with Companies House (no. 13452848) and currently active.

    4.9โ˜… (9 reviews)3 verification sources
    4.9โ˜…
    9 reviews

  5. Redwood Construction Cardiff Ltd is a builder in Cardiff, rated 5/5 from 8 Google reviews. Registered with Companies House (no. 09209064) and currently active.

    5.0โ˜… (8 reviews)3 verification sources
    5.0โ˜…
    8 reviews

  6. Reid Building Limited is a builder in Cardiff, rated 5/5 from 7 Google reviews. Registered with Companies House (no. 13017891) and currently active.

    5.0โ˜… (7 reviews)3 verification sources
    5.0โ˜…
    7 reviews

  7. FORTY BUILDERS LTD is a builder in Cardiff, rated 4.7/5 from 32 Google reviews. Registered with Companies House (no. 09481445) and currently active. Verified Google Business Profile.

    4.7โ˜… (32 reviews)3 verification sources
    4.7โ˜…
    32 reviews

  8. AJ Construction (Cardiff) Ltd is a builder in Cardiff, rated 4.7/5 from 25 Google reviews. Registered with Companies House (no. 15766287) and currently active. Verified Google Business Profile.

    4.7โ˜… (25 reviews)3 verification sources
    4.7โ˜…
    25 reviews

  9. TUGWELL MASTER BUILDERS is a builder in Cardiff, rated 5/5 from 6 Google reviews.

    5.0โ˜… (6 reviews)Companies House registered
    5.0โ˜…
    6 reviews

  10. MCS Construction & Developments is a builder in Cardiff, rated 5/5 from 16 Google reviews. Verified Google Business Profile.

    5.0โ˜… (16 reviews)
    5.0โ˜…
    16 reviews

Want more options? See all builders in Cardiff โ†’