Irrigation is priced by zones, not by acreage. Understanding what forces a system into more zones explains most of the difference between quotes.
Zones drive the number
Each zone needs its own valve, wiring and pipe run, so zone count is the main cost driver.
Available water pressure and flow set how many heads can run at once. Low flow means more, smaller zones — and a higher price for the same lawn.
Different exposures and plant types also force separate zones: sun and shade, lawn and beds, turf spray and drip.
Site and layout
Open lawn is quick to trench and pipe. Beds, trees, walls, patios and driveways all mean hand work, boring or sleeving.
Slope may require check valves at low heads to prevent drainage out of the lowest head after every cycle.
Irregular shapes and narrow strips need more heads per square foot than clean rectangles.
Components and code
Head type and quality: rotors for large areas, sprays for small ones, drip for beds. Better heads and nozzles cost more up front and waste less water.
Controller: a basic timer versus a smart, weather-based controller with flow monitoring.
Backflow prevention is a code requirement and its type depends on the water source and local rules — confirm requirements with your water provider.
A separate irrigation meter, where available, can affect long-run water and sewer charges and is worth asking your utility about.
What to compare in quotes
Zone count and what is in each zone. Head make and model. Pipe type and depth. Controller and sensors. Backflow device. Restoration of trenches and lawn.
A cheaper system with fewer, larger zones will water unevenly for its whole life, which costs more in water and in replaced plants than the saving.
Southern Style Turf & Design designs and installs irrigation systems across the Lake Norman area, sized to actual pressure and flow rather than to a template.
Frequently asked questions
How many zones does an average yard need?
It depends on water pressure and flow, plus how many distinct areas there are. A pressure and flow test at the property is what determines it.
Does an irrigation system raise my water bill?
It uses water, but a well-designed system with a smart controller often uses less than hand watering or an older poorly zoned system.
Is a smart controller worth the extra cost?
Generally yes. Weather-based scheduling avoids watering before and after rain, which is where most waste happens.
Want this looked at on your property?
We give free, no-pressure on-site estimates across Denver, Mooresville, Cornelius, Davidson, Huntersville and Troutman.
