Service area · Boulder County, CO
Plumbing in Longmont, CO
Longmont is a Boulder County city along the St. Vrain River, where the September 2013 flood damaged homes and infrastructure. It mixes a historic downtown with mid-century neighborhoods and newer developments on its edges.
- Neighborhoods
- Old Town Longmont, Prospect, Southmoor Park, Clover Basin
Plumbing in Longmont homes: what to know
Old Town and central Longmont have early-1900s and mid-century homes with galvanized pipe, cast-iron drains and clay sewer laterals; outer neighborhoods are 1980s–2020s with basements and PEX. Longmont Water supplies city water.
River-area sewer backups
Homes near the St. Vrain can be affected by sewer surcharges in heavy storms. Backwater valves and camera inspections are worthwhile in older riverside neighborhoods.
Mature trees and old laterals
Tree-lined older streets mean roots in clay sewer lines, a leading cause of basement backups in central Longmont.
2013 flood repairs
Homes along the St. Vrain had basements flooded in September 2013. Water heaters, furnaces and drains replaced then are now more than a decade old and worth checking.
Most common plumbing calls in Longmont
Also available in Longmont: emergency plumbing, sewer camera inspections, and every service on our full list of 25 plumbing services.
Longmont at a glance
- Neighborhoods
- Old Town Longmont, Prospect, Southmoor Park, Clover Basin, Union Reservoir area
- ZIP codes
- 80501, 80503, 80504
- County / state
- Boulder County, Colorado
Longmont homeowners ask
Who issues plumbing permits in Longmont?
The City of Longmont building services division issues permits within city limits.
Is a sewer scope worth it in Old Town Longmont?
Yes, especially before buying. Clay and cast-iron laterals under mature trees often have roots or cracks.
Does Longmont require a permit to replace a water heater?
Yes, generally. The City of Longmont requires permits for water heater replacement; your plumber should pull it and schedule the inspection.