🔧 Official Rankings
10 Best Plumbers in Longmont, CO (August 2026)
We compared 10 plumbers serving Longmont and Boulder County, Colorado, and ranked the top providers by verified reviews, ratings, and local reputation — 6,999 customer reviews in all.
The 10 listed below hold an average rating of 4.9 out of 5, led by Longmont Water Heaters. Updated for August 2026.
- Plumbers ranked
- 10
- Average rating
- 4.9★
- Reviews analyzed
- 6,999
- Area codes
- 720, 303
Longmont Water Heaters
⭐ 5.0 · 209 reviews
1003 S Bross St, Longmont, CO 80501
M and M Heating, Cooling, Plumbing and Electrical
⭐ 4.9 · 3436 reviews
110 S Bowen Cir, Longmont, CO 80501
Welzig Heating, Air, Plumbing & Electric
⭐ 4.9 · 1409 reviews
1831 Boston Ave, Longmont, CO 80501
Mountain Valley Plumbing and Heating
⭐ 4.9 · 851 reviews
210 Collyer St, Longmont, CO 80501
Mountain Range Plumbing
⭐ 4.9 · 440 reviews
5315 Coyote Dr, Longmont, CO 80504
Colorado Green Plumbing, Heating and Cooling
⭐ 4.9 · 154 reviews
338 Main St Ste 14, Longmont, CO 80501
Streamline Plumbing, LLC
⭐ 4.9 · 154 reviews
1740 Skyway Dr, Longmont, CO 80504
Kodiak Plumbing Solutions, LLC
⭐ 4.9 · 147 reviews
225 Price Rd #45, Longmont, CO 80504
Jim Needham Heating Cooling Plumbing and Drain
⭐ 4.9 · 89 reviews
525 3rd Ave #118, Longmont, CO 80501
Plumbers listed here serve Longmont, Boulder County, and nearby ZIP codes including 80501, 80502, 80503, 80504.