Irrigation installation cost in Southern New Hampshire depends on the number and type of landscape zones, water source, pressure and flow, site access, controls, existing surfaces, restoration, and future expansion. A useful estimate maps the system and its assumptions instead of inventing a universal price per zone.
Begin with water supply and available capacity
Measure static and operating pressure, available flow, connection location, and any well or municipal-water constraints. The system design must fit the supply. Adding heads without enough flow can create poor coverage and long run times; oversizing pipe or equipment without a design goal adds cost without solving the right problem.
| Cost driver | What changes | Estimate detail to request |
|---|---|---|
| Zone count | Valves, wiring, controller capacity, labor, and schedule complexity | Zone map and landscape type served |
| Water source | Connection, backflow protection, pumping, filtration, or pressure control | Measured supply assumptions and included equipment |
| Site access | Trenching route, machine size, hand work, and material movement | Protected areas and access limitations |
| Existing surfaces | Crossings beneath walks or drives and restoration of lawn or beds | Crossing method and restoration scope |
| Landscape mix | Turf heads, drip zones, slopes, narrow strips, and plant-water needs | Emission type and coverage by zone |
| Controls | Controller, sensors, communications, and electrical needs | Exact product functions and setup |
Count hydrozones, not just sprinkler heads
Turf, shrub beds, sunny slopes, shaded areas, new planting, and narrow strips may need different application methods or schedules. A design with fewer poorly matched zones can waste water and harm plants. A design with many unnecessary zones adds equipment and service complexity. The right count follows the site.
Include protection and restoration
Document existing utilities, drains, lighting, invisible dog fence, septic components, tree roots, patios, walks, walls, and planting to protect. The estimate should state how trench lines, disturbed lawn, beds, and hardscape crossings will be restored and what appearance is expected immediately versus after regrowth.
Plan controls and winterization
Controller capacity should include the installed zones and reasonable expansion. Sensors and weather-responsive features only add value when they are configured and maintained. Southern New Hampshire systems also need an accessible winterization and spring-startup plan that fits the components and water source.
Ask for a comparable proposal
- Measured water-source assumptions
- Plan showing zones, valves, heads, drip, and main components
- Product classes and controller capacity
- Backflow, electrical, and permit scope where applicable
- Utility locating and crossing methods
- Lawn, bed, and hardscape restoration
- Testing, adjustment, owner orientation, and records
- Winterization, warranty, and service exclusions
Randall Landscaping provides landscape design and installation services in Southern New Hampshire. A site-specific irrigation estimate can connect the water source, landscape zones, controls, access, restoration, and future plans without relying on unsupported price ranges.