Business Details
Expert Excavation & Septic Services in Boise, ID
A3 Underground Construction is a fully licensed excavation contractor with over 30 years of experience serving Boise, Caldwell, Nampa, and surrounding areas. We specialize in septic system installation and repair, underground utility trenching, drainage solutions, grading, and demolition services. Our team of certified professionals handles projects for residential, agricultural, commercial, and industrial clients, offering complete site evaluation, system design, permitting, and installation.We are state-certified for complex septic systems including aerobic and nitrogen reduction systems. Our commitment to superior workmanship, competitive pricing, and adherence to building codes has earned us a reputation for reliability and customer satisfaction. We maintain a modern equipment fleet to ensure efficient project completion on time and within budget.
Services
Septic Tank Installation
Septic Tank Repair
Utility Trenching
Excavation Services
Drainage Solutions
Demolition Services
Grading Services
Sewer Line Installation
Storm Water Management
Site Preparation
Highlights and features
- Over 30 years of experience in excavation and septic system installation
- State-certified for complex septic systems including aerobic and nitrogen reduction systems
- Locally owned and operated with family values
- One of the few certified complex system installers in the Boise area
- Complete project management from site evaluation to final installation
Associations and certifications
- State of Idaho
What people say
Great job
Fair price
Highly professional
Fast service
Excellent customer service
Services
Septic Tank Installation
We provide complete septic tank installation services for residential and commercial properties. Our state-certified team designs and installs standard and complex systems including aerobic and nitrogen reduction models. All installations meet Idaho building codes with proper permitting and site evaluation.
Septic Tank Repair
Our experts handle all septic tank repair needs including leak detection, component replacement, and system restoration. We offer septic tank locating, leach field repair, and enzyme treatments to maintain optimal system function for residential and agricultural properties.
Utility Trenching
We perform utility trenching for water, sewer, gas, electric, and telecommunications lines. Our services include joint trenching, large cable installation, and code-compliant excavation for new construction or utility upgrades in residential and industrial settings.
Excavation Services
Our excavation services cover grading, lot clearing, and site preparation for residential and commercial development. We handle building pads, driveway installation, and large-scale earthmoving projects using modern equipment and experienced operators.
Drainage Solutions
We design and install comprehensive drainage systems including French drains, culverts, and retaining ponds. Our solutions address agricultural field drainage, residential stormwater management, and commercial property water control needs throughout southwest Idaho.
Questions
What septic system services do you offer?
We provide complete septic system installation, repair, and maintenance services including aerobic and nitrogen reduction systems, leach field repairs, and septic tank replacements.
Do you serve areas outside Boise?
Yes, we serve the entire Boise Metropolitan area including Caldwell, Nampa, McCall, Weiser, and surrounding communities in central and southwest Idaho.
Are you licensed for complex septic systems?
Yes, we are state-certified to install and repair complex septic systems including aerobic, microbic, and nitrogen reduction systems in compliance with Idaho regulations.
What excavation services do you provide?
We offer grading, lot clearing, building pad preparation, utility trenching, and demolition services for residential, agricultural, and commercial projects of all sizes.
How can I schedule a consultation?
Contact us at (208) 257-3208 or (208) 630-3017 to schedule an onsite consultation for septic system evaluation, excavation projects, or drainage solutions.
