In Lone Tree, Southgate Water and Sanitation serves west of I-25 and Parker Water and Sanitation serves east of it, with a small part of Terra Ridge on Northern Douglas County Water and Sanitation. The city requires a permit for any plumbing or gas work, filed only through its online Accela portal. Call the number on this page to be connected with a local plumber in Lone Tree.

Lone Tree basics
Lone Tree is a planned city at the I-25 and C-470 junction, built around Park Meadows and the RidgeGate community, so most commercial buildings are relatively new. Utilities split along the interstate. West of I-25, Southgate distributes Denver Water drinking water as a read-and-bill distributor and also handles sewer. East of I-25, Parker Water and Sanitation District serves water and sewer. Southgate reminds owners that they own the buried water service lines and sewer laterals serving their home or business. Gas is Xcel Energy.
First moves when something breaks
- Shut the fixture's valve, or the building's main if water is spreading.
- Take any backed-up drains out of service and keep customers or patients away from the area.
- West of I-25, call Southgate at 303-779-0261 for a break or backup on the district's side; east of I-25, call Parker Water and Sanitation.
- If staff smell gas, evacuate, then call 911 and Xcel Energy at 1-800-895-2999 from outside.
- Photograph damage and note when it started.
- Call the number on this page for a plumber on the private side.
Common symptoms
| Symptom | Likely cause |
|---|---|
| Wet ground between the curb and the building | A leak on the owner's service line |
| Several drains backing up together | A blockage in the owner's sewer lateral |
| Hot water running out in a busy office or clinic | An undersized or failing heater |
| Constant running in restroom fixtures | Worn flush valve parts |
| Low pressure on upper floors | A failing pressure regulator or a partly closed valve |
What drives the cost
The number of fixtures, suites or floors involved is the main factor, followed by how hard the problem is to find and reach. Because Southgate owners own their buried service lines and sewer laterals, a leak or collapse outside the building can mean excavation on the owner's bill. Lone Tree requires a permit for any work on plumbing or gas systems, including replacement, and lists new water heaters and in-building sewer line repairs as permit work; clearing a stoppage or fixing a drain or supply leak usually doesn't need one. Applications and inspection requests are electronic only, through Accela. The fact sheet didn't confirm backflow testing rules for either district, so ask Southgate or Parker Water and Sanitation what applies to your account. Off-hours work to keep the business open also adds to the price.
Commercial Plumbing questions in Lone Tree
How do we find out which water or sewer district serves our building?
Who is responsible for the sewer line from our building to the main?
Which office issues plumbing permits for a commercial property?
Does a business here need its backflow assemblies tested every year?
More plumbing services in Lone Tree
Commercial Plumbing nearby
Helpful guides
Sources
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