Building on acreage in Palomino Valley? Adding a casita in Washoe Valley? Replacing a 40-year-old system in Dayton? New septic work starts with soil and paperwork, not a backhoe.
We connect you with licensed septic installers who handle the test trench, design, permits, install, and final inspection.
What's included
- Site visit and test trench or percolation testing
- System design sized to bedrooms and soil
- Permit application with your local health authority
- Tank and drainfield installation
- Inspections and final sign-off
Signs you need this
- You're building a new home on a lot without sewer
- You're adding bedrooms, an ADU, or a guest house
- Your current system has failed and can't be repaired
- Your lot is being converted from an old cesspool
How the permit process works
In Washoe County, new septic systems start with a test trench inspection to pick the right system type. The design goes in with your building permit. Inspections during construction confirm the system matches the plan.
Other counties follow a similar path through their health authority. Planning ahead keeps your build on schedule.
Leave room for a repair area
Health departments usually require a reserve area for a future replacement drainfield. When you add a garage, shop, or ADU, the septic layout has to be checked so you don't build over it.
New Septic System Installation cost
New conventional systems often start around $15,000 and go up from there. Engineered or advanced treatment systems for tough soils can cost much more.
See the full Northern Nevada price guide →
New Septic System Installation near you
We serve homes on septic in 22 towns and neighborhoods across Northern Nevada:
Common questions
How long does a new septic install take?
The install itself is often a few days to two weeks. Permits and design can add several weeks, so start early.
Can I add an ADU on my existing septic?
Maybe. The system has to be sized for the total bedrooms. A site check tells you if you can add on or need an upgrade.