Septic System Services in Lebanon, New Hampshire
Why Trust Our Septic Systems in Lebanon, NH?
Lebanon sits along the Connecticut River in Grafton County, and that proximity shapes what a septic system needs to work here. Soil composition in New Hampshire varies dramatically by region and even by neighborhood, and closer to the river corridor, groundwater tends to sit higher and soil conditions shift more than property owners expect. A design that works two miles up the hill doesn’t automatically work on a lot near the river.
That’s the starting point. What comes after it is where local knowledge matters.
A proper system starts with a real site assessment — soil composition through percolation testing, depth to groundwater and bedrock, topography, and proximity to wells and water bodies. Where groundwater sits too high or bedrock is too shallow for a standard gravity-fed system, a mound system that elevates the drain field above grade is often the right call, not a workaround.
Along the I-89 corridor and throughout Grafton County, we’ve designed and installed systems suited to lots that a generic approach would have gotten wrong.
Murphy & Son Construction Inc. has worked septic installations across the Lebanon area for years. We design for the ground your property actually sits on.
Get a Quote from Septic Systems Experts in Lebanon, New Hampshire!
Client Experiences with Our
Septic Systems Contractors in Lebanon, New Hampshire
Services We Provide
Driveway Grading and Roads
Bridges
Demolition
Equestrian Riding Construction
Foundation Excavation
Utility Excavation
What Makes Our Septic Systems in Lebanon, NH, Efficient and Reliable?
A septic system that fails within a few years usually wasn’t matched to the site in the first place. We start with assessment, not assumption.
Site evaluation comes first. We assess soil type, percolation rate, groundwater depth, and bedrock proximity specific to your lot, because a property near the Connecticut River corridor can need a different system entirely than one further from the water table.
From there, we work through state design and permitting requirements before installation begins — Grafton County and New Hampshire environmental regulations govern system type, setbacks, and approval, and getting that step right protects the project from delays later.
Installation proceeds to the approved design, whether that’s a conventional gravity-fed system on suitable soil or a mound system where groundwater or bedrock requires it. Tank placement, drain field construction, and backfill are all handled to spec.
We finish with a final inspection to confirm the system passes state requirements and is ready for use, not just installed and left for the inspector to catch problems.
Case Studies
A homeowner near West Lebanon needed a new septic system on a lot close to the Connecticut River with high groundwater. Percolation testing and site assessment confirmed a conventional system wouldn’t meet separation requirements, so we designed and installed a mound system that met state approval on the first submission and has performed reliably since.
A property owner outside Lebanon had an aging system showing signs of drain field failure. We assessed soil and groundwater conditions, confirmed the original system was undersized for the lot’s actual percolation rate, and installed a properly sized replacement system. The new system has run without issues through multiple seasons.
RECENT PROJECTS
Take a look at some of our latest work completed recently. From land clearing and grading to demolition and full site prep we do it all. Scroll through the photos below to see our team in action and the results we deliver.
FAQs About Our Septic System Services In Lebanon
Does my lot need a mound system, or will a standard septic system work?
Depends on groundwater depth and soil conditions on your specific property. Lots closer to the Connecticut River often have higher groundwater, which can require a mound system. We determine this through site assessment and percolation testing before design.
How much does a septic system installation or replacement cost in Lebanon, NH?
Depends on system type, site conditions, and whether it’s new installation or replacement. Mound systems typically cost more than conventional systems. We quote after assessing the site.
Do you handle the state design and permitting process, or just installation?
Both. We manage design, permitting, and installation as one process, so approval and construction stay aligned from the start.
How do I know if my current septic system is failing?
Signs include slow drains, sewage odors, standing water near the drain field, or backups. We can assess an existing system and advise on repair versus replacement.
Do you install both residential and commercial septic systems?
Yes. We handle residential and light commercial septic system design and installation across Lebanon and Grafton County.