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Irrigation contractors in Hunterdon County

New Jersey is one of the few states that actually licenses lawn sprinkler installers, and most homeowners have no idea. The state license is the dividing line: who is licensed to install these systems, and who just shows up with a trencher.

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What it costs

Full system installation in New Jersey runs about $2,500 to $6,000 for a typical home, with per-zone national pricing around $590 to $1,340 (Lawn Love and Contractor+ NJ cost guides, 2026). Rocky or compacted soil can add $500 to $1,500. Annual spring startup and backflow testing typically run separately, usually $75 to $200 per visit, and township ordinances generally require that testing be filed by August 31 each year.

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Before you sign anything

  1. Ask for the New Jersey Irrigation Contractor license number. The trade is licensed by the Department of Community Affairs (not Consumer Affairs, and not the mylicense.com portal other trades use); verify a license through the DCA licensing unit at LIC@dca.nj.gov or 609-984-7834. This is a real licensed trade, not a registration, so the number should be on the contract.
  2. Ask separately whether they hold NJDEP-recognized backflow tester certification, or subcontract that piece. Installing the system and testing the backflow preventer are two different credentials, and a shop that's vague about which one they carry is worth a follow-up question.
  3. Get the zone count and pipe depth in writing. NJ frost lines mean shallow-buried lines are a callback waiting to happen.
  4. Ask who does spring startup and fall winterization, and whether it's included the first year or billed separately. This is recurring business, not a one-time install, so the ongoing relationship matters as much as the install price.
  5. Confirm your township's backflow certification deadline (commonly August 31) and who files the paperwork with the code enforcement office. A contractor who doesn't mention this is leaving you to find out the hard way.

New Jersey licenses this trade separately from general home improvement contractors: the state Board of Landscape Irrigation Contractors, under the Department of Community Affairs, Division of Codes and Standards, requires a business permit and a licensed individual who passed the Board-required certification exam (the Irrigation Association CIC exam or its equivalent) with at least three years of hands-on or educational experience (N.J.S.A. 45:5AA, rules at N.J.A.C. 5:62). A second, unrelated credential also matters here: anyone testing the backflow preventer on the system needs a separate NJDEP-recognized backflow tester certification.

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The local picture

This is a small, specialized trade here, mostly a handful of dedicated irrigation shops plus landscaping companies that added sprinklers as a side line. The dedicated operators are worth the extra look, since backflow testing and winterization are recurring annual work, not one-time installs.

Questions neighbors actually ask

Does New Jersey really license lawn sprinkler installers?

Yes, and it surprises most homeowners. New Jersey licenses landscape irrigation contractors through the Board of Landscape Irrigation Contractors under the Department of Community Affairs, Division of Codes and Standards (N.J.S.A. 45:5AA, rules at N.J.A.C. 5:62). The individual has to pass the Board-required certification exam and show at least three years of relevant experience, and the business carries a permit tied to that license. The Department issued a consumer alert about this exact trade in 2018 because so many installers were operating unlicensed.

Do I need a backflow preventer on my sprinkler system?

Yes. New Jersey building code requires a backflow preventer on any lawn sprinkler system before it can be used, to keep lawn chemicals and standing water from siphoning back into the drinking water supply. It has to be tested when installed and then retested every year by someone who holds a separate NJDEP-recognized backflow tester certification, not the general irrigation license.

When does my backflow test need to be filed?

Most Hunterdon townships follow the common New Jersey deadline of August 31 each year for lawn sprinkler backflow certifications, filed with the local code enforcement office, which then issues a certificate of compliance. Deadlines are set locally, so confirm with your specific township if you're unsure.

Why does my quote vary so much between contractors?

Zone count, pipe depth, soil conditions, and whether the quote includes the backflow device and its testing all move the number. Rocky or compacted soil alone can add $500 to $1,500. Ask each contractor to itemize zones and materials so you're comparing the same job twice, not a stripped-down quote against a complete one.

51 businesses filed under Landscaping & Lawn Care in the county directory, A–Z

Everything filed under Landscaping & Lawn Care in the county directory, alphabetically. It is a broad category, so it takes in neighboring lines of work as well as irrigation contractors. No ordering, no ranking, no picks.

Names, towns and numbers come from The Hunterdon Scoop business directory, pulled July 28, 2026. Want this list narrowed to your town? Browse Landscaping & Lawn Care by town. A business appearing here is not a recommendation, and no business pays to be on it.

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