Building a home or replacing a system that has reached the end of its life means a properly designed and permitted septic install. Here is what a new septic system costs in the Roswell area, why the perc test matters, and how the process works in Chaves County's rocky high-desert soils.
A new septic system in the Roswell area typically runs about $5,000 to $15,000 or more, once you include the tank, the drain field, excavation, and permitting. What moves the number:
Because the perc test and soil dictate the design, a firm quote comes after the site is evaluated. Request a quote and tell us whether it is a new build or a replacement.
A percolation (perc) test measures how quickly your soil absorbs water and is required to design and permit any septic system. In the arid, rocky, and often caliche-heavy soils around Roswell, perc results largely decide the size and type of drain field you need — slow-draining ground calls for a larger field or an advanced system, while better-draining ground allows a conventional design. Skipping or shortcutting the perc test leads to systems that fail early.
After the perc test and county permit, a typical residential install takes a few days: excavation, setting the septic tank, building the drain field to the approved design, connecting the line from the house, backfilling, and a final inspection. A well-designed system paired with routine maintenance and on-schedule pumping can last decades. Ask about tank size, field type, and warranty before you hire.
Not every lot in Roswell and Chaves County can use a standard gravity system. Here is how the common types compare:
The right choice depends on your perc test, lot size, setback distances, and budget. We walk you through the options during the design stage so the quote you get is the system that actually fits your property.
If you are building new, the septic design happens alongside the home's layout, so the tank and field are placed correctly relative to the house, well, and property lines. If you are replacing a failed system, the old tank and field are removed and the new design must meet current county code — which is often stricter than when the old system was built. Either way, the county permit and final inspection protect you and the next owner.
A new septic system is a decades-long investment, and it is only as good as its maintenance. Pump the tank on schedule, keep heavy machinery off the drain field, spread water use, and avoid flushing anything that clogs lines. Pair your install with a maintenance plan and on-schedule pumping to get the full life out of the system.
About $5,000 to $15,000 or more, driven by tank size, drain field design, and perc test results.
Yes — it is required to design and permit the system and determines your drain field.
A few days of site work once the perc test and permit are in hand; permitting adds lead time.
Usually sized to the number of bedrooms and water use; we confirm during design.
Visit the full FAQ page for more.
Drain field design, repair, and replacement.
Inspect a system before buying or building.
Keep a new system healthy for decades.
You can also review tank pumping, tank & line repair, and the areas we serve.