🔧 Official Rankings
10 Best Plumbers in O'Fallon, MO (August 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 August 2026.
- Plumbers ranked
- 10
- Average rating
- 4.8★
- Reviews analyzed
- 11,985
- Area codes
- 636, 314
Faszold Heating and Cooling
⭐ 4.9 · 870 reviews
1613 E Terra Ln, O'Fallon, MO 63366
Hosack Plumbing, Heating & Cooling
⭐ 4.9 · 725 reviews
110 W Pitman St, O'Fallon, MO 63366
Hoffmann Brothers
⭐ 4.9 · 369 reviews
2046 Queens Brooke Blvd #240, St Peters, MO 63376
Budget Heating, Cooling & Plumbing
⭐ 4.8 · 6317 reviews
325 Mid Rivers Mall Dr, St Peters, MO 63376
Roto-Rooter Plumbing & Water Cleanup
⭐ 4.8 · 1318 reviews
1237 Jungermann Rd, St Peters, MO 63376
Reliable Heating & Cooling Inc.
⭐ 4.8 · 118 reviews
2813 W Terra Ln, O'Fallon, MO 63366
Precision Plumbing Solutions
⭐ 4.7 · 1384 reviews
812 Midpoint Dr, O'Fallon, MO 63366
Gateway Winnelson
⭐ 5.0 · 15 reviews
201 S Cool Springs Rd, O'Fallon, MO 63366