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, ID Septic System Installation Contractor

Best Value for Septic Tank Installation and Replacement
Throughout The Boise & Washington County Area

Over 30 Years of Experience in Standard and Complex Septic System Design and Installation

A3 Underground Construction offers high quality, comprehensive, and competitively priced septic system installation services for Boise, Nampa, Caldwell, McCall, and nearby areas. As a fully licensed and insured excavation and septic system contractor, we are qualified to provide a complete range of underground septic system design and installation services. Whether you need a replacement concrete septic tank for your private estate in Nampa, a new septic system for your industrial building in Caldwell, or a custom engineered complex aerobic system for your ranch in Boise, we can deliver the ideal solution at a great price. Over the 30 years we have been in business, we have served thousands of satisfied commercial, agricultural, and residential clients, who trust us because of our expert workmanship, reliable advice, and honest business practices.

Complete Septic System Installation From Start to Finish. Site Evaluation and Sewage System Design for Homes, Restaurants, Industrial Facilities, Farms, and Ranches

Our dedicated and highly trained team of seasoned professionals has the skills, expertise, and knowledge to handle every aspect of your septic system installation. This includes everything from site evaluation and soil analysis, septic system design, and leach field design and installation, to pulling building permits, excavating, grading, trenching for utility lines, and preparing hookups that feed into your distribution box. For ease of cleaning and future maintenance, we can also install septic tank risers, lids, and cleanout covers. Because all jobs are owner supervised, you can rest assured that your project will be completed on time, on budget and in compliance with all relevant building codes, permitting regulations, and setback requirements.

Certified Complex Alternative Septic System Installer for Complex Aerobic Systems and Nitrogen Reduction Systems

A3 Underground Construction is one of the few state-certified installers of complex alternative septic systems and sewage disposal systems in the Boise area. With our experienced staff, well-maintained equipment, and industry expertise, we are qualified to work on a wide range of complex and alternative septic systems, including:

  • Aerobic septic systems
  • Nitrogen reduction systems
  • Microbic systems
  • At-grade soil absorption systems
  • Drip distribution systems
  • Large soil absorption systems
  • Drain field remediation components
  • Individual lagoons
  • Pressure distribution and transport systems
  • Evapotranspiration systems
  • And more . . .

If You Need a Standard or Complex Septic System Installer in Boise, Nampa, McCall, Caldwell, or Other Nearby Areas, Call A3 Underground Construction

Contact us today to schedule a convenient personalized consultation anywhere in Boise, Nampa, Caldwell, McCall, Weiser, and nearby areas. Friendly and knowledgeable members of our staff are ready to answer any questions you have about a new or retrofitted septic system, underground drainage system, or alternative complex septic system.

Why Choose A3 Underground Construction

  • Certified to Install and Repair Standard and Complex Septic Systems, Including Aerobic and Nitrogen Reduction Systems
  • Complete Site Evaluation and Site Planning Services
  • Fiberglass, Plastic, and Concrete Septic Tanks
  • Drain Field/Leach Field Design and Installation
  • Competitive Prices and Exceptional Customer Service
  • Thousands of Residential & Commercial Septic Tanks Installed
  • Onsite Estimates and Personalized Consultations
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Send Us a Message

For fastest response, please call (208) 257-3208, (208) 630-3017


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

Susan Haggard Via Facebook Review

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

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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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