A & E LANDWORX
Verified · Lic. 11165Monroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level IV) · NC NCOWCICB · verified 2026-06-25
Union County, NC · Septic System Installation
Septic System Installation in Union County
A new or replacement system in Union County starts with a soil test and a permit — not a shovel.
Installing a septic system is the largest-ticket job a septic owner faces, and the design is dictated by your land: soil type, how fast it percolates, and how high the water table sits all decide what system you're allowed to build and what it costs.
Every legal install begins with a site evaluation and a county permit. The output of that evaluation — conventional drainfield, engineered mound, or an aerobic/nitrogen-reducing unit — is what drives the final price far more than the tank itself.
Local conditions in Union County
Local ground is the deciding factor in Union County: Most lots have adequate vertical separation, but perched seasonal water above clay can fail an otherwise good-looking lot — soil color (gray mottling) is the tell. And the rules here matter — all work under 15a ncac 18e with three-permit (ip/ca/op) sequence administered by each county health department, which can raise the cost of a new system considerably.
How a septic installation works
- Site & soil evaluation. A licensed evaluator or engineer tests percolation and locates the seasonal high water table to determine what the soil can handle.
- System design. The system is sized to your soil and the number of bedrooms, and the type is chosen — conventional, mound/filled, or aerobic.
- County permit. Plans are submitted to the county health department for an OSTDS construction permit before any work begins.
- Tank and drainfield install. The tank is set and the drainfield is built to spec, with fill brought in where the water table requires elevation.
- Final inspection. The county inspects the open system and signs off before it's covered and put into use.
What drives the cost
- System type — conventional vs. mound vs. aerobic/nitrogen-reducing
- Soil and water table (high water tables require expensive fill)
- Drainfield size, which scales with bedroom count
- Permit and engineering/site-evaluation fees
- Site access and how much excavation is needed
- Tank material and capacity
How to choose a pro
- Use a licensed Registered or Master Septic Tank Contractor
- Make sure they pull the county permit (never skip it)
- Insist the design matches your soil/site evaluation
- Get the warranty and final county approval in writing
30 septic system installation providers in Union County
License-verified contractors (active state license) are listed first.
A2Z SEPTIC SOLUTIONS LLC
Verified · Lic. 14393Mooresville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
AFFORDABLE SEPTIC REPAIR
Verified · Lic. 1754Wingate, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25
AMAZING SEPTIC SERVICES
Verified · Lic. 11541Weddington, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25
AME BUILDING GROUP LLC
Verified · Lic. 14032Monroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
ANTHONY SWANSON
Verified · Lic. 14926Matthews, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
ASPIRE BUILDING COMPANY LLC
Verified · Lic. 11351Indian Trail, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
BARBEE LAWN AND LANDSCAPING LLC
Verified · Lic. 9941Monroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25
BUILDING SCIENCES
Verified · NC NCOWCICBMarshville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector · NC NCOWCICB · verified 2026-06-25
BUILDING SCIENCES 16:3 STRUCTURAL ENVIRO
Verified · Lic. 2946Marshville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level IV) · NC NCOWCICB · verified 2026-06-25
C & J PROPERTIES
Verified · Lic. 14049Marshville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
CADDEL EXCAVATING AND SEPTIC LLC
Verified · Lic. 14978Waxhaw, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
CAROLINAS SEPTIC SERVICES
Verified · NC NCOWCICBMonroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector · NC NCOWCICB · verified 2026-06-25
CJD DEVELOPMENT GROUP LLC
Verified · Lic. 12081Waxhaw, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25
CODY SMITH
Verified · Lic. 15413Marshville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
DAHL SEPTIC SERVICES
Verified · Lic. 9407Monroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level IV) · NC NCOWCICB · verified 2026-06-25
DANIEL JORDAN
Verified · Lic. 7983Monroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
DAVID E LANEY CONST CO
Verified · Lic. 1734Monroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25
DAVID FORBIS
Verified · NC NCOWCICBMonroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector · NC NCOWCICB · verified 2026-06-25
DAVID IGNATOVICH
Verified · Lic. 11422Wingate, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25
DBM GRADING SERVICES
Verified · Lic. 11984Monroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
DEEP SOUTH PLUMBING
Verified · Lic. 9589Indian Trail, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25
DERUN CONSTRUCTION INC
Verified · Lic. 14990Indian Trail, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
DIRECT SERVICE PLUMBING
Verified · Lic. 11716Monroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
EAGLE ENGINEERING INC
Verified · NC NCOWCICBIndian Trail, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector · NC NCOWCICB · verified 2026-06-25
ELMTREE ENTERPRISE LLC
Verified · Lic. 14597Matthews, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
ETHAN WISE
Verified · Lic. 11958Cherryville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25
FINLEY ENVIRONMENTAL SERVICES
Verified · Lic. 14818Weddington, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
GALA HOMES & PROPERTIES LLC
Verified · Lic. 11573Monroe, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level IV) · NC NCOWCICB · verified 2026-06-25
GRO BUILDING & CONSTRUCTION LLC
Verified · Lic. 14788Indian Trail, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
Septic System Installation in Union County — FAQ
What does a new septic system cost in Union County?
Conventional systems commonly run from several thousand dollars to well over $10,000; mound and nitrogen-reducing systems cost more. Soil and water-table conditions in Union County are the biggest cost driver.
Do I need a permit to install a septic system in Union County?
Yes. Permits are issued by the Local authorized agent / county health department in Union County, under North Carolina Department of Health and Human Services (NC DHHS), Division of Public Health — Environmental Health Section, On-Site Water Protection Branch (OSWP)., and the system must pass inspection before use.
How long does an installation take?
Once permitted, the install itself is often 1–3 days, but evaluation and permitting can add weeks. Plan ahead.