Complex Septic
+ Site Infrastructure
Built for the work that has to be right.
Advanced septic installation, septic repair, wastewater infrastructure, excavation, and grading for engineered, commercial, and public-sector projects across the Southeast.
+
Years in Business
Join Our Team :
- What We Do
SEPTIC & SITEWORK FOR THE WAY THE SOUTHEAST BUILDS.
Residential and Builder Septic
For homeowners, manufactured home builders, residential developers, and high-volume septic installation programs.
For complex septic systems, alternative systems, drip dispersal, challenging terrain, and engineer-led projects.
Excavation, Grading & Sitework
For the dirt work that makes septic and infrastructure possible: clearing, grading, trenching, hauling, access, and erosion control.
For commercial properties, parks, agencies, public facilities, and government-ready work requiring certified execution.
Commercial, Public & Government Projects
TRUSTED ACROSS RESIDENTIAL, COMMERCIAL & PUBLIC PROJECTS
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- About MHI Contractors & Septic
BUILT FROM THE GROUND DOWN
MHI began with septic installation and grew into the excavation, grading, and site infrastructure work that complex projects require.
About Us
Since 2005, MHI has continued to add the licenses, equipment and capabilities needed to take on more complex septic, wastewater and sitework projects across the Southeast.
Our Mission
To install septic, wastewater, and site infrastructure systems with the licensing, equipment, and field experience required to get the job done right.
Our Vision
To be the contractor homeowners, builders, engineers, and agencies call when the site is difficult, the system matters, and the work cannot be guessed through.
FIELD-PROVEN. LICENSED. READY FOR COMPLEX WORK.
Established Date
+
States MHI Is Licensed In
+
Annual Builder Septic Installs
SEPTIC SYSTEMS BUILT FOR THE SITE.
DRIP DISPERSAL SYSTEMS
Designed to distribute wastewater evenly while reducing the drainfield footprint, drip dispersal systems can help preserve more usable space for pools, fire pits, landscaping, and outdoor living.
BEST FOR
- Limited lot space
- Challenging soils
- Sloped terrain
- Builder projects
- Outdoor living plans
- Engineered systems
PRE-TREATMENT SYSTEMS
Advanced wastewater treatment solutions used when a site requires treatment before final dispersal.
BEST FOR
- Alternative septic systems
- High-strength wastewater needs
- Commercial or public facilities
- Sites with permitting constraints
PANEL BLOCK SYSTEMS
Often used where site conditions call for an alternative to traditional stone-and-pipe installation.
BEST FOR
- Residential septic systems
- Builder-driven installs
- Space-sensitive sites
- Efficient field installation
GRAVEL AND PIPE SEPTIC SYSTEMS
Standard septic tank and drainfield systems for residential, builder, and qualifying commercial projects.
Best for
- New home construction
- Residential builders
- Replacement systems
- Standard drainfield installation
- Our Frequently Asked Questions
Septic FAQs: Simple and Straightforward.
Yes. MHI installs residential septic systems for homeowners, builders, manufactured home projects, and residential development sites. For routine septic pumping or ongoing septic maintenance, our sister company M&M Septic may be the better fit.
Yes. MHI supports builder-driven septic installation, including high-volume residential and manufactured home projects that require scheduling, site coordination, permitting awareness, and consistent field execution.
Yes. MHI installs advanced and engineered septic systems, including drip dispersal, pre-treatment, panel block, conventional systems, pump systems, and other approved wastewater solutions based on site conditions and project requirements.
Yes. MHI is a one-stop shop for septic and wastewater projects. Our team can support the full process from system design and permitting to installation, inspections, and approval to operate. Whether the project involves a residential septic install, builder-driven development, engineered system, or commercial site, MHI helps coordinate the steps required to move the project from plan to approved operation.
MHI combines septic certification with excavation, grading, hauling, heavy sitework, and complex project experience. That means fewer handoffs, better field coordination, and a team built for jobs that require more than a basic install.
Yes. MHI supports commercial properties, public facilities, parks, agencies, and government-ready projects requiring septic, wastewater, excavation, grading, and site infrastructure experience.
- As Featured in in The Dirt by John Deere
FEATURED PROJECTS & FIELD NOTES
Septic Installation at Greer Middle College in Taylors, South Carolina
MHI Contractors completed a commercial septic and wastewater installation for Greer Middle College in Taylors, South Carolina, coordinating tanks, pumps, controls, piping and excavation within an active campus construction...
No Walk in the Park: Extensive Septic Installation in North Carolina State Park
Last year, Full Circle Environmental of Clayton, North Carolina, and MHI Contractors of Mills River, North Carolina, took on the challenging job of rejuvenating the Hanging Rock State Park's...
Onsite Installer Feature: MHI Contractors and Septic, Miles Holden, Continues to Challenge Himself
Driven by a passion for solving problems, Miles Holden built his business on continuous learning, a commitment to helping customers and taking on the most difficult installations