Septic Installation Cottleville MO – House Excavating LLC

Serving Cottleville, St. Charles, Weldon Spring, Dardenne Prairie, O’Fallon & All of St. Charles County

Looking for reliable, licensed septic installation in Cottleville, Missouri? House Excavating LLC is the local expert residents and businesses trust for professional septic system design, installation, repair, and maintenance. With over 20 years of experience in St. Charles County, we deliver code-compliant septic systems that last.

Call us today at (636) 213-5003 or (573) 203-1123 for a free on-site evaluation and quote.

Why Cottleville MO Septic System Services We Offer

• New Residential & Commercial Septic Tank Installation
• Conventional and Alternative Septic Systems (including mound systems & drip irrigation)
• Drain Field / Leach Field Installation & Replacement
• Septic Tank Pumping & Cleaning
• Excavation & Land Clearing
• Land Grading & Site Preparation
• French Drains & Surface Water Management
• Perc Testing & Soil Evaluation

About Cottleville, Missouri

Cottleville is one of the fastest-growing communities in St. Charles County. As of 2025, the city has a population of approximately 5,700 residents and continues to attract new families and businesses thanks to its excellent schools, historic charm along Hwy N, and easy access to Highway 364 and I-64. With hundreds of new homes built in Legacy of Cottleville, The Forest at Cottleville Trails, and surrounding subdivisions in the last few years, the demand for professional septic installation has never been higher, especially on larger lots outside city sewer limits.

Why Choose House Excavating LLC in Cottleville?

• Fully licensed & insured in the State of Missouri
• St. Charles County Health Department approved installer
• Upfront pricing – no hidden fees
• Latest equipment for minimal yard disturbance
• 5-star rated on Google, Facebook & Yelp

Real Customer Reviews from Cottleville & Surrounding Areas

⭐⭐⭐⭐⭐ “House Excavating installed a new septic system for our new build in Cottleville last month. They handled everything from the perc test to final grading. Professional crew, showed up on time, and left the yard cleaner than when they arrived. Highly recommend!” – Jennifer R., Cottleville, MO (October 2025)

⭐⭐⭐⭐⭐ “We had a failing drain field on our 15-year-old home near Hwy N. They replaced the entire leach field in just three days and saved us from connecting to city sewer (huge cost savings). Best excavating company we’ve ever worked with.” – Mark T., Cottleville, MO (August 2025)

⭐⭐⭐⭐⭐ “Needed emergency grading and French drains after heavy spring rains flooded our basement. They came out the same day, fixed the water issue, and even re-seeded the yard. True lifesavers!” – Sarah K., Weldon Spring, MO (May 2025)

Proudly Serving Cottleville & All Surrounding Areas

• Cottleville
• St. Charles
• Weldon Spring
• Dardenne Prairie
• O’Fallon
• Lake St. Louis
• Wentzville
• St. Peters
• Defiance
• New Melle

Get Your Free Septic Installation Quote Today

Whether you’re building a new home, replacing an old system, or need excavation and grading services in Cottleville, House Excavating LLC is ready to help.

📞 Call or Text (636) 213-5003 or (573) 203-1123

House Excavating LLC – Cottleville’s trusted choice for septic installation, excavation, and drainage solutions since 2003. Missouri licensed · Fully insured · Free estimates · Same-day service available.