Inside town limits, Larkspur Public Works supplies Denver Basin well water and runs the sewer, with a contract operator, Semocor, handling emergencies after hours. The Town, not Douglas County, issues building permits, and SAFEbuilt does inspections. Call the number on this page to be connected with a local plumber in Larkspur.

What happens on the call
You'll be connected with an independent local plumber who takes commercial work around Larkspur. Describe the property, whether it's a shop near the interstate, an event or campground facility or a small office, along with the problem and whether water is still on. Seasonal businesses often need systems brought back online in spring or winterized in fall, so mention that if it applies.
Ask whether a permit is needed. Inside town limits, the Town of Larkspur Building Department at 8720 Spruce Mountain Road handles building permits, 303-681-2324, and SAFEbuilt does inspections, scheduled at 720-641-1956. The Town's page doesn't mention plumbing permits specifically, so confirm before replacing a heater or changing piping.
What affects the cost
- The size of the facility and number of restrooms
- Seasonal startup or winterizing of large systems
- Freeze damage in buildings that sit empty part of the year
- Digging to reach service or sewer lines
- Permits and after-hours work
Local conditions in Larkspur
Larkspur is a small town in the East Plum Creek valley along I-25, about 11 miles south of Castle Rock, best known as home of the summer Colorado Renaissance Festival. Its Public Works Department runs the water and wastewater systems inside town limits under a Water and Sewer Board, with the water system operated under contract by Semocor. Drinking water comes from three Denver Basin wells in the Denver and Arapahoe aquifers, not surface water. Water and sewer are billed together.
For a water emergency inside town limits, call Town Hall at 303-681-2324 during business hours, or Semocor at 303-681-2253 after hours. Areas of the 80118 ZIP outside town limits aren't covered by these services, so confirm where your property sits. The fact sheet didn't describe a Larkspur backflow program, so ask the Town what testing applies to assemblies on irrigation, fire lines or food service equipment.
Gas is Black Hills Energy. For a gas smell, get everyone out, then call 911 and Black Hills using the number on the gas bill.
Checklist before the plumber arrives
- Find the main shutoff and any building valves
- Note which restrooms or fixtures are affected
- Clear access to heaters, cleanouts and meters
- Know whether you're inside town limits
Commercial Plumbing questions in Larkspur
Who do we call if a water main or meter problem shuts down the building?
Is our address under the city or the county for permits?
Can a plumber work before we open or after we close?
What should employees do if they smell gas at work?
More plumbing services in Larkspur
Commercial Plumbing nearby
Helpful guides
Sources
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