The Average Cost to Install a Residential Lawn Sprinkler System

Sprinkler Heads

• Every sprinkler system is divided into zones. Each zone represents a mini system of up to 10 sprinkler heads. For an average lawn, expect to use about five zones. That means you will need about 50 sprinkler heads for the system to cover the entire surface area. Sprinklers are available in both plastic and metal. As of August 2011, plastic sprinklers average about $5 per head. That makes the investment in sprinklers about $250. Although both types of sprinklers operate the same, metal heads are considered to be more durable and cost a few dollars more than their plastic counterparts. The type of sprinkler that you select will also determine the final price. While spray nozzles are the least expensive option, premium rotating sprinkler heads can cost up to $15 each. Rotating heads use less water but cover the same surface area.

Valves

• Sprinkler zones are operated by a series of valves that are installed in a manifold assembly. Valves control the flow of water from the main supply line. There are a wide variety of valves on the market, but as of August 2011, expect most valves to cost about $20 each. Most homes require four or five zones to cover the entire yard, making the investment about $100. Anti-siphon valves, which prevent water from flowing back into main lines on smaller systems, can add about $50 to the final price of a valve system.

Pipes

• Sprinkler pipes are made out of PVC. This injection-molded plastic is very durable, and can remain underground for decades without corroding. Most home improvement stores carry a large assortment of PVC pipe, at a cost of about $5 per 10 feet. To figure the amount of pipe that your system will need, estimate the size in square feet of the entire yard surface and divide by 10. For example, a yard with 1,000 square feet will require 100 lengths of pipe, at a cost of $500 as of August 2011.

Timers

• In order for your sprinkler system to operate automatically, you will need to purchase a timer. Sprinkler timers are priced based on how many zones they control. A 4-zone timer will usually cost much less than an 8-zone timer, for example. The price of timers will also depend on the features. Some models contain rain sensors that automatically delay the sprinklers during storms, while others have digital panels that are easy to read. Pick the timer that best fits your needs and budget.