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Onslow County, NC · Septic System Installation

Septic System Installation in Onslow County

A new or replacement system in Onslow County starts with a soil test and a permit — not a shovel.

See 30 verified pros

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 Onslow County

Local ground is the deciding factor in Onslow County: Meeting the required separation to the seasonal high water table is the central challenge; many lots need imported fill, raised systems, or simply don't qualify without engineering. And the rules here matter — strict separation-to-seasonal-high-water-table drives heavy use of fill/mound and low-pressure pipe systems, which can raise the cost of a new system considerably.

How a septic installation works

  1. Site & soil evaluation. A licensed evaluator or engineer tests percolation and locates the seasonal high water table to determine what the soil can handle.
  2. System design. The system is sized to your soil and the number of bedrooms, and the type is chosen — conventional, mound/filled, or aerobic.
  3. County permit. Plans are submitted to the county health department for an OSTDS construction permit before any work begins.
  4. 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.
  5. 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 Onslow County

License-verified contractors (active state license) are listed first.

AAWWW CRAP SEPTIC SERVICE LLC

Verified · Lic. 5036
Hubert, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level IV) · NC NCOWCICB · verified 2026-06-25

ALAN WADE HARDIN

Verified · Lic. 11353
Richlands, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level IV) · NC NCOWCICB · verified 2026-06-25

ALL AMERICAN OUTDOOR SOLUTIONS

Verified · Lic. 14373
Hubert, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

ALL THINGS PLUMBING ENC INC

Verified · Lic. 11467
Jacksonville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

AMERICAN EAGLE EXCAVATION LLC

Verified · Lic. 6642
Jacksonville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level II) · NC NCOWCICB · verified 2026-06-25

ANCHOR & CROW HOME INSPECTIONS

Verified · NC NCOWCICB
Hubert, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector · NC NCOWCICB · verified 2026-06-25

ANTHONY NIX

Verified · NC NCOWCICB
Jacksonville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector · NC NCOWCICB · verified 2026-06-25

APPLIED RESOURCE MANAGEMENT

Verified · Lic. 14998
Hampstead, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

B B INSPECTIONS

Verified · NC NCOWCICB
Swansboro, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector · NC NCOWCICB · verified 2026-06-25

B BENTON & CO LLC

Verified · Lic. 11091
Newport, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

BENJAMIN FRANKLIN JOHNSON

Verified · Lic. 12090
Holly Ridge, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

BILLY MARSHBURN/LANDWORKS

Verified · Lic. 4512
Richlands, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level IV) · NC NCOWCICB · verified 2026-06-25

BRAD NEUMANN

Verified · NC NCOWCICB
Jacksonville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector · NC NCOWCICB · verified 2026-06-25

BRANDON DAVIS

Verified · Lic. 3950
Richlands, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25

BRIAN A GIBSON

Verified · Lic. 14186
Swansboro, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

BURCH WORKS LANDSCAPING INC

Verified · Lic. 9604
Hubert, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25

C & M SEPTIC

Verified · Lic. 9435
Mt Olive, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level IV) · NC NCOWCICB · verified 2026-06-25

CAROLINA EARTHWERX

Verified · Lic. 11766
Hubert, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

CAROLINA ENVIRONMENTAL SERVICES

Verified · NC NCOWCICB
Swansboro, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector · NC NCOWCICB · verified 2026-06-25

CAROLINA SHORES HOME INSPECTION

Verified · NC NCOWCICB
Swansboro, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector · NC NCOWCICB · verified 2026-06-25

CAROLINA TRACKHOE SERVICES LLC

Verified · Lic. 14283
Sneads Ferry, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level II) · NC NCOWCICB · verified 2026-06-25

CHRISTIAN BARNHILL

Verified · Lic. 13000
Sneads Ferry, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level IV) · NC NCOWCICB · verified 2026-06-25

CHRISTOPHER NORTHERN

Verified · Lic. 14676
Richlands, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

COASTAL SEPTIC PROS

Verified · Lic. 11275
Hubert, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

COASTAL WASTE SOLUTIONS LLC

Verified · Lic. 7170
Jacksonville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Inspector (Level IV) · NC NCOWCICB · verified 2026-06-25

CONNECTED CONTRACTING

Verified · Lic. 15167
Jacksonville, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

CRUMPLER'S

Verified · Lic. 4214
Cape Carteret, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

CUSTOM CRAFT CONSTRUCTION

Verified · Lic. 4906
Richlands, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

CUSTOM CRAFT DESIGN & CONSTRUCTION INC

Verified · Lic. 4905
Richlands, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25

DANIEL LUDLUM

Verified · Lic. 14081
Sneads Ferry, NC
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
On-Site Wastewater Contractor (Level II) · NC NCOWCICB · verified 2026-06-25
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Septic System Installation in Onslow County — FAQ

What does a new septic system cost in Onslow 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 Onslow County are the biggest cost driver.

Do I need a permit to install a septic system in Onslow County?

Yes. Permits are issued by the Local authorized agent / county health department in Onslow 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.

Other services in Onslow County

Emergency Septic ServiceSeptic RepairSeptic Tank PumpingSeptic Inspection

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