🔧 Official Rankings
10 Best Plumbers in O'Fallon, MO (September 2026)
We compared 10 plumbers serving O'Fallon and Saint Charles County, Missouri, and ranked the top providers by verified reviews, ratings, and local reputation — 11,985 customer reviews in all.
The 10 listed below hold an average rating of 4.8 out of 5, led by Faszold Heating and Cooling. Updated for September 2026.
- Plumbers ranked
- 10
- Average rating
- 4.8★
- Reviews analyzed
- 11,985
- Area codes
- 636, 314
⭐ 4.9 · 870 reviews
1613 E Terra Ln, O'Fallon, MO 63366
⭐ 4.9 · 725 reviews
110 W Pitman St, O'Fallon, MO 63366
⭐ 4.9 · 369 reviews
2046 Queens Brooke Blvd #240, St Peters, MO 63376
⭐ 4.8 · 6317 reviews
325 Mid Rivers Mall Dr, St Peters, MO 63376
⭐ 4.8 · 1318 reviews
1237 Jungermann Rd, St Peters, MO 63376
⭐ 4.8 · 118 reviews
2813 W Terra Ln, O'Fallon, MO 63366
⭐ 4.7 · 1384 reviews
812 Midpoint Dr, O'Fallon, MO 63366
⭐ 5.0 · 15 reviews
201 S Cool Springs Rd, O'Fallon, MO 63366