Standard & Complex Septic Tank Repair & Installation Services

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Office:Contact A3 Underground, Boise, Idaho Septic Contractor    Cell:Contact A3 Underground, Boise, Idaho Septic Contractor
We Serve Customers Throughout the Boise Metropolitan Area

Boise - Nampa - Meridian - Middleton - Caldwell - McCall - New Plymouth - Midvale

Boise Septic Tank Repair & Replacement Services

The Best Value in Septic Tank Repair for Boise,
Washington County, and Nearby Areas

Reliable, Locally Owned Septic Tank Repair Company With Over 30 Years of Experience

A3 Underground Construction provides Boise, Nampa, Emmett, Meridian, Caldwell, and nearby areas with high quality, cost-effective septic tank system repairs. We have over 3 decades of experience in installing, repairing, and maintaining underground septic systems for residential, agricultural, and commercial clients, and have become known for exceptional workmanship, superior service, and competitive pricing. With our staff of septic system experts, we can provide reliable septic tank locating, septic system troubleshooting, septic tank repairs, leach field repair, and more. In addition, we are septic companies serving the Boise Metropolitan Area that is licensed by the State of Idaho to work on complex septic systems, such as aerobic septic systems, nitrogen reduction systems, microbic systems, large soil absorption systems, and drip distribution systems.

Complete Septic System Repair Services for Commercial Businesses, Farms, Ranches, Agricultural Sewer Systems, Estates, Warehouses, Restaurants and Industrial Facilities

Our comprehensive range of septic tank repair services includes but is not limited to:

  • Septic tank repair and replacements
  • Aerobic and nitrogen reduction systems repair
  • Septic tank relocation
  • Manual and electronic septic tank locating
  • Drain/leach line additions
  • Drain/leach field repair
  • Septic tank riser installation
  • Septic tank lid installation
  • Cleanout cover installation
  • Tank partition repair
  • Inlet/outlet tee replacements
  • Tree root removal from sewage lines
  • Septic tank enzymes for a healthy septic system

Accurate Troubleshooting and Long-Lasting Repairs for Faulty Septic Systems

Common signs of septic system failure include wet spots in the drain field area, plumbing or septic tank backups, sewage odors, or slow drainage. If you have noticed any of these symptoms on your property, give A3 Underground Construction a call today. Over the years we have installed, repaired, and maintained thousands of septic tanks, and have the knowledge and expertise to properly diagnose and repair septic system problems of all kinds. We will not only provide a thorough assessment of the problem, but can also deliver a long-lasting, cost-effective solution that fits your needs and budget. Even if you don't know the location of your septic tank, we can find it for you using manual or electronic locating, then excavate the septic tank lid to gain access to your system.

Long-Lasting Septic Tank Repair Services In and Near Boise, Nampa, Caldwell, McCall, and Weiser From Industry Experts

Whether you need to add leach lines at your estate in Nampa, relocate a septic tank at your ranch in Caldwell, or repair a cracked concrete septic tank for your warehouse in Boise, we have the skills and expertise to get the job done quickly, efficiently, and in accordance with all relevant building codes.

Contact us today to speak to a member of our friendly and knowledgeable staff if you'd like to schedule an on-site assessment. We offer affordable prices on our expert sewage system repair services for Nampa, Caldwell, McCall, Weiser, and surrounding areas throughout the entire Boise Metropolitan area.

Why Choose A3 Underground Construction

  • Cost-Effective Septic Tank Repair Services
  • Leach Line Additions and Stone Drain Field Repair
  • Complex Septic System Repair, Including Aerobic and Nitrogen Reduction Systems
  • Root Removal and Septic Lid Excavation Services
  • Septic Tank Locating (Manual and Electronic)
  • Expert Workmanship at Very Competitive Prices
  • Fully Licensed & Insured Excavation & Septic System Contractor
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For fastest response, please call (208) 257-3208, (208) 630-3017


Highly professional, always a great job for a fair price. You can't go wrong with this company for your excavation needs.

Linda Coyle Standifer Via Facebook Review

They have done many jobs for me and friends Always happy with the work done!

Susan Haggard Via Facebook Review

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We provide septic, grading, excavation, trenching, and drainage services throughout central and southwest Idaho, including but not limited to:

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