In Niwot, sewer comes from Niwot Sanitation District, and its rules make each user responsible for the entire sewer service line from the building drain to the main. Replacing that line is the fix when it has failed in several places. Call the number on this page to be connected with a local plumber in Niwot.

What happens when you call
You'll be connected with an independent local plumber who works in Niwot. Expect questions about which drains back up, how long the problem has been going on and whether the line has been cleared before. The plumber will usually camera the line before quoting, since the pipe material, depth and location of the damage determine whether it's a repair, lining, pipe bursting or a trench.
Niwot is unincorporated, so building permits come from Boulder County Community Planning and Permitting. Its Building Safety and Inspection Services office is in the Courthouse Annex at 2045 13th Street in Boulder, 303-441-3926. The plumber will normally confirm what the county requires and file it.
What affects the cost
- Length and depth from the building drain to the district main
- Whether the line still holds its slope
- Mature trees, fences and outbuildings on larger lots
- Any connection work, which the district controls
- County permit and inspection
Niwot's sanitation district
Water and sewer in Niwot come from two separate special districts: Left Hand Water District for water and Niwot Sanitation District for sewer. Niwot Sanitation District collects and treats wastewater at its own plant and covers about seven square miles. Its rules say each user constructs and maintains the entire sewer service line from the building drain to the main and must repair leaks or breaks after notice. Only the district or its representative may make connections to district lines, so if a replacement involves the connection at the main, the district needs to be in the loop. Its office is at 7395 N. 95th Street, and the emergency line is 303-652-2525, press 1.
Niwot sits on State Highway 119 about halfway between Boulder and Longmont, with a historic downtown along 2nd Avenue. Homes near the old downtown are the likeliest to have aging clay or cast iron pipe, while newer homes generally have plastic pipe that fails from settling or later digging.
Before the plumber arrives
- Use as little water as you can
- Locate the cleanout and clear the area
- Have your Niwot Sanitation District account details handy
- Note which fixture backs up first
- Keep the likely line route clear of vehicles
Sewer Line Replacement questions in Niwot
Where does my responsibility for the sewer line end?
Should I call the utility or a plumber first when sewage backs up?
Who issues the permit for a sewer line replacement here?
What kind of pipe goes in when a sewer line is replaced?
More plumbing services in Niwot
Sewer Line Replacement nearby
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