How often AI search engines name plumbing contractors in Frederick when homeowners ask for recommendations. 12% nationwide are invisible.
| # | Company | Score |
|---|---|---|
| 1 | Michael & Son — Frederick, MD | 61/100 |
| 2 | Putman Plumbing — Frederick, MD | 60/100 |
| 3 | Michael & Son — Frederick, MD | 54/100 |
| 4 | Roto-Rooter Plumbing & Water Cleanup — Frederick, MD | 54/100 |
| 5 | Roto-Rooter Plumbing & Water Cleanup — Frederick, MD | 49/100 |
| 6 | Frederick Plumbing & Heating — Frederick, MD | 49/100 |
| 7 | Smith Family Plumbing — Frederick, MD | 26/100 |
| 8 | Smith Family Plumbing — Frederick, MD | 24/100 |
When a Frederick homeowner asks ChatGPT, Perplexity, or Gemini "best plumbing near me", the engine names 3 to 5 specific companies. The companies on the leaderboard above are the ones being named. Everyone else is invisible to that query.
The gap is almost entirely mechanical: schema markup, citation density in local trade directories, structured content on the site, and presence in Reddit + Quora threads for Frederick service queries.
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Run my auditPart of The 2026 AI Visibility Index for Trade Contractors. These rankings are computed from 30 LLM queries x 4 engines using Methodology v2026.06.1. CC-BY-4.0.