1. Begin with the property and intended use
A new home, an addition and a failed-system replacement begin with different information. Property boundaries, household size, existing records, wells, slopes and available area can all affect the process.
2. Complete site evaluation and design
A qualified New Hampshire septic designer evaluates the property and prepares a system design appropriate to the site and proposed use. The installer should build from the approved plan rather than a generic system concept.
3. Obtain required approvals
The design moves through applicable state and local review. Approval timing varies, and changes requested during review can affect the construction schedule.
4. Price and schedule installation
With an approved design, an excavation contractor can more accurately evaluate quantities, access, equipment, materials, existing-system removal and finish work. Weather and ground conditions affect scheduling in New Hampshire.
5. Excavate and place components
The installer lays out and excavates the approved system, prepares required areas, sets tanks and components and builds the disposal area according to the plan and applicable requirements.
6. Inspection, backfill and grading
Required inspection occurs before components are permanently covered. After approval, the site is backfilled and graded according to the agreed scope, with stabilization or final landscape restoration handled as specified.
Questions to ask before hiring
- Who is responsible for design and permitting coordination?
- What site restoration and finish grading are included?
- How are ledge, unsuitable soils or unexpected conditions handled?
- Who schedules required inspections?
- What payment schedule and change-order process apply?