Where it all started. Southside Plumbing was born in Highlands Ranch and has been your neighborhood’s trusted plumbing team for two decades — from Backcountry to Town Center and everywhere in between.Your Trusted Plumber in Highlands Ranch, CO

YOUR NEIGHBORHOOD PLUMBER
Highlands Ranch Is Where Our Story Began
Southside Plumbing was founded right here in Highlands Ranch in 2005 by Mark Friesen, a master plumber, and his wife Liz. What began as a home-based business has grown into the South Denver metro’s most trusted residential plumbing team — but Highlands Ranch has always been home.
Our expert team includes four master plumbers and a journeyman plumber, supported by apprentices enrolled in our rigorous four-year training program that includes evening classes on code and essential trade skills. We don’t just send inexperienced plumbers to your door — every technician who arrives at your Highlands Ranch home is thoroughly trained and ready to solve the problem right.

850+ Google Reviews
Serving South Metro Denver
Family Operated
Insured
WHAT WE DO
Full-Service Residential Plumbing
From a dripping faucet to a complete plumbing remodel, our master plumbers handle every job with the same level of care and precision.
Plumbing Repair & Maintenance
Fast, effective solutions for leaks, fixture failures, and plumbing issues in your Sterling Ranch home — including addressing common new-construction settling problems.
Drain Clearing
Persistent blockages in kitchen sinks, bathtubs, and main lines cleared with state-of-the-art equipment. New construction debris can sometimes cause unexpected clogs.
Water Heaters
Upgrade from builder-grade water heaters to premium tank or tankless systems sized for your household. We also handle repairs and annual maintenance.
Plumbing Remodeling
Upgrading a Sterling Ranch bathroom or kitchen beyond the builder’s spec? We handle all the plumbing — rerouting lines, installing premium fixtures, and code compliance.
Water Filtration & Softeners
Colorado’s hard water is tough on new plumbing and appliances. A whole-house water softener or filtration system protects your investment from day one.
Gas Line Services
Adding a gas fireplace, fire pit, outdoor grill, or gas range? Our certified technicians install and repair gas lines safely and to code.




I've needed Southside three times in the past two years...for a new water heater (they had the best price), a new shut off valve for my sprinklers, and most recently to fix a phantom noise in one of my toilets. After nearly three hours of troubleshooting, Kyle was able to find a small plastic/ceramic thing was stuck in the water line and remove it. Problem solved. Would use these guys again in a heartbeat.













My wife and I decided on moving forward with a new Navien tankless water heater and a Halo whole house water filtration system.
Mark, Adam, Trevor, and Isaiah performed with excellence to remove the old tank and install the new systems all within a day.
We have been enjoying the improved water quality and endless hot water with the new systems.
I highly recommend trusting Southside Plumbing with all of your plumbing needs!
FAQs for Highlands Ranch Homeowners
A clogged vent pipe or drain line is typically the cause of gurgling pipes. Obstructions prevent air or water from flowing freely, and you may hear gurgling from trapped air or gas bubbles. Depending on where the sound originates, the problem could be isolated to one fixture or affect your entire system. Our team can diagnose the source and clear it quickly.
A good rule of thumb is the 50% rule: if the repair cost exceeds 50% of a new water heater’s price, replacement is the better investment. You should also consider how often you’ve needed repairs and the age of your unit. Our plumbers will give you an honest assessment and help you weigh both options.
Yes. We understand that plumbing emergencies can’t wait. Our team offers same-day service for urgent repairs throughout Highlands Ranch. Give us a call at 720-773-9336 and we’ll get a plumber to your home as quickly as possible.
Common signs include unexplained increases in your water bill, the sound of running water when nothing is on, damp spots on walls or ceilings, musty odors, or warm spots on floors. Our leak detection team uses advanced equipment to pinpoint leaks behind walls, under floors, and in your yard with minimal disruption.
It means we tell you exactly what the job will cost before we start any work. No hidden fees, no surprises on your bill. We also offer financing options for larger projects so you can take care of your home without financial stress.