The Town of Larkspur runs the water system inside town limits, drawing from Denver Basin aquifer wells, and a leak on the buried line between the meter and your house is generally a private repair. Water emergencies go to Town Hall during business hours and to the contract operator, Semocor, after hours. Call the number on this page to be connected with a local plumber in Larkspur.

What happens when you call
You'll be connected with an independent local plumber who works in Larkspur; this site handles the referral, not the repair. The plumber will ask where the water is appearing, whether you're inside town limits and whether pressure dropped throughout the house. Expect a meter check, line tracing and a recommendation to repair a section or replace the line.
What affects the price
- Run length. Larger lots in the valley can mean longer lines.
- Soil and slope. Hillside lots off Spruce Mountain Road can slow digging.
- Repair or replacement. One joint versus a new service.
- Restoration. Driveways, trees and landscaping add work.
- Permit. Inside town limits, the Town, not Douglas County, issues building permits.
Larkspur conditions
Larkspur is a small town in the East Plum Creek valley of southern Douglas County along I-25, about 11 miles south of Castle Rock, best known as home of the summer Colorado Renaissance Festival. The Town's Public Works Department runs water and wastewater within town limits under a Water and Sewer Board, and the water system is operated under contract by Semocor. Water comes from three wells in the Denver and Arapahoe aquifers rather than surface water. Parts of the 80118 ZIP outside town limits aren't covered by the Town system, so check your bill if you're on the edge.
For a water emergency inside town limits, call Town Hall at (303) 681-2324 on weekdays from 9 a.m. to 5 p.m.; outside those hours, call Semocor at (303) 681-2253. The Town's pages don't say exactly where its pipe ends and the owner's begins, so call before digging if water is surfacing at the meter.
Building permits inside town limits go through the Town of Larkspur Building Department at 8720 Spruce Mountain Road, with SAFEbuilt doing inspections (720-641-1956). Its page doesn't mention plumbing permits specifically, so confirm what a service line repair needs.
Before the plumber arrives
- Close the main shutoff if water is flowing.
- Confirm whether you're inside town limits.
- Mark the wet area and note when it appeared.
- Keep the Semocor number handy if it's after hours.
- Turn off irrigation so it doesn't hide the leak during testing.
- Move vehicles off the driveway if the line may run beneath it.
Water Line Repair questions in Larkspur
Should I call the water provider or a plumber first?
Do I need a permit to repair or replace my water service line?
How do I find out which water provider serves my address?
Can a new line be installed without digging a long trench?
More plumbing services in Larkspur
Water Line Repair nearby
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