St. Louis & St. Charles County
Your Local Plumbing
Experts — Done Right.
Landmark Plumbing delivers fast, dependable plumbing services to homeowners and businesses across St. Louis and St. Charles County. We show up on time, diagnose it accurately, and fix it right.
Available 24/7 for emergencies
- 22+ Years Experience
- Master Plumber
- Same-Day Service Available
What We Do
Plumbing Services for Every Need
From routine maintenance to full-scale commercial projects, Landmark Plumbing handles it all with the same commitment to quality.
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Residential Plumbing
Full-service plumbing for your home — repairs, replacements, and new installations handled with care.
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Commercial Plumbing
Reliable plumbing solutions for offices, restaurants, retail spaces, and multi-unit properties.
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Drain Cleaning
Slow drains or full blockages — we clear them fast with professional equipment and lasting results.
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Water Heater Repair & Installation
Hot water when you need it. We repair, replace, and install all makes and models including tankless units.
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Sewer Line Repair
From camera inspections to trenchless repairs, we diagnose and fix sewer problems with minimal disruption.
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Cast Iron & Older Home Specialist
Experienced with older plumbing systems, cast iron drain lines, galvanized pipe, and the unique challenges that come with aging homes.
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Tankless Water Heater Specialist
Installation, service, and repair of tankless water heater systems. Endless hot water, lower energy bills, and expert setup done right.
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Emergency Plumbing
Burst pipe? Flooded basement? We're available around the clock. Call now and a plumber will be on the way.
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Limited-Time Savings
Save on Your Next Service
Choose the offer that fits your project, then show the coupon when your Landmark Plumbing technician arrives.
About Landmark Plumbing
Quality Work You Can Count On
Landmark Plumbing provides reliable plumbing services with a focus on quality workmanship, fast response, and honest pricing. We're a local company that understands the unique needs of homeowners and businesses in the St. Louis and St. Charles area.
Every job is handled by licensed, experienced plumbers who treat your property with respect. We believe in doing the job right the first time — and standing behind our work.
- Local, family-operated business
- Serving the St. Louis metro since 2005
- All work backed by a satisfaction guarantee
- Fully licensed, bonded, and insured
Where We Work
Serving St. Louis & St. Charles County
We provide fast, dependable plumbing services throughout the greater St. Louis metro area.
- St. Charles
- O'Fallon
- Saint Peters
- Wentzville
- Lake Saint Louis
- Dardenne Prairie
- New Melle
- Flint Hill
- Defiance
- Foristell
- Chesterfield
- Ballwin
- Wildwood
- Maryland Heights
- Creve Coeur
- Kirkwood
Don't see your city? Call us — we likely serve your area.
Why Landmark Plumbing
The Right Choice for St. Louis Plumbing
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Licensed & Insured
Every plumber on our team is fully licensed in the state of Missouri and backed by comprehensive insurance for your peace of mind.
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We Show Up On Time
Your time matters. We arrive within the scheduled window, communicate if anything changes, and get to work without delay.
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Upfront, Honest Pricing
We give you a clear estimate before any work begins. No surprise charges, no hidden fees. What we quote is what you pay.
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Satisfaction Guaranteed
We stand behind every job we do. If something isn't right, we'll come back and make it right — no questions asked.
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Fast Emergency Response
Plumbing emergencies can't wait. We're available 24/7 and dispatch a technician to your location as quickly as possible.
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Locally Owned & Operated
We live and work in this community. Supporting Landmark Plumbing means supporting a local St. Louis business that cares.
Common Questions
Frequently Asked Questions
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Yes — we provide free, no-obligation estimates for most plumbing projects. Call us to schedule and we'll walk you through what to expect.
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We strive to respond to plumbing emergencies within 60–90 minutes in most of our service area. When you call, we'll give you an honest ETA based on technician availability and your location.
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Absolutely. All of our technicians hold a valid Missouri plumbing license and our company carries full general liability and workers' compensation insurance. We're happy to provide proof on request.
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Yes. We handle plumbing for single-family homes, condos, apartment complexes, restaurants, offices, retail stores, and more. Our team is equipped for both routine maintenance and large-scale commercial work.
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We primarily serve St. Charles County and St. Louis County — including O'Fallon, Saint Peters, Wentzville, Dardenne Prairie, New Melle, Flint Hill, Defiance, Foristell, Lake Saint Louis, Chesterfield, Ballwin, Wildwood, Kirkwood, and surrounding communities. Not sure if we cover your area? Just give us a call.
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We accept cash, check, and all major credit cards. Financing options may be available for larger projects — ask us for details when you call for your estimate.
What Our Customers Say
Trusted by Homeowners Across St. Louis & St. Charles County
Professional plumbing service backed by real local customer experiences.
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“As a Kitchen & Bath Remodel Contractor, Five31 has seen its share of Plumbers over the years. Landmark Plumbing is our first choice for every project we do, for 3 reasons. Trust, Quality, and Professionalism. I don't have time for anything less. Mark works closely with our customers and its important to me that they are WELL taken care of. Mark shares the same values, so I know our customers are in good hands. Every time. We put our reputation in Marks hands often, so recommending him for any plumbing needs you may have comes with ease. Looking forward to seeing you soon, Mark!”
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“Mark did a great job rerouting some of our plumbing. He has done plumbing for us several times in the past, and he has always done a really good job. He is very knowledgeable and friendly. I highly recommend him.”
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“Called late on a Wednesday expecting to get a voice mail and Mark personally answered the phone and set me an appointment for Friday morning! He was there on time and so nice. He did not rush me or talk down to me when I explained the problems I was having like a lot of "professionals" do. He walked through all his recommendations and let me decide what was best for my home. The work was done quickly, cleanly and now there are NO LEAKS!! 100% will give his name to anyone looking for a plumber and will trust him with anymore work in my home!”
Ready to Get Started?
Whether it's a small repair or a full installation, we're ready to help. Call us now or request a free quote — we respond fast.