Irrigation License Requirements by State: All 50 States + DC

Alabama Contractor Rules Apply

There’s no state irrigation license. Large residential projects (over $10,000) can fall under the Home Builders Licensure Board, and the Irrigation Association lists Alabama among states that have considered irrigation licensing. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Alaska Registration Required

Issuing Agency: Alaska Division of Corporations, Business & Professional Licensing

No irrigation-specific license, but every contractor registers with the state with a bond ($10,000 specialty, $5,000 handyman for jobs up to $10,000) and liability insurance.

Arizona ROC License ($1,000+)

Issuing Agency: Arizona Registrar of Contractors (ROC)

What you need: An ROC license for jobs of $1,000 or more in labor and materials, or any job needing a permit. Irrigation work falls under the ROC’s landscaping and irrigation classes (C-21 commercial, R-21 residential, CR-21 dual).

Residential licensees post a bond set by annual volume and pay into the Residential Recovery Fund. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Arkansas License Over $2,000

Issuing Agency: Arkansas Contractors Licensing Board

Residential projects over $2,000 need a home improvement license, and irrigation has its own specialty: No. 23, “Landscaping, Irrigation, Lawn Sprinkler Systems, Streams.” Commercial work needs a commercial license at $50,000 or more.

California C-27 License ($1,000+)

Issuing Agency: Contractors State License Board (CSLB)

What you need: A C-27 Landscaping license, which covers irrigation sprinkler systems, for any job of $1,000 or more in labor and materials. Under $1,000, the exemption also requires no permit and no employees on the job (AB 2622, 2025).

Licensing takes four years of journey-level experience, two exams and a $25,000 bond. Many California water agencies also require irrigation plans and efficiency standards under the state’s landscape water ordinance.

Colorado No State License

There’s no state irrigation license. Denver Water, Aurora and other utilities have their own irrigation and backflow rules, and cities may license contractors who pull permits. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Connecticut Lawn Sprinkler License

Issuing Agency: Connecticut Department of Consumer Protection

What you need: A limited lawn sprinkler license under the plumbing board. J-3 Limited Lawn Sprinkler Contractor (two years as a journeyperson or equivalent) covers installing, repairing, altering and maintaining lawn sprinkler systems. J-4 Limited Lawn Sprinkler Journeyperson (a one-year registered apprenticeship or equivalent) does the same work while employed by a licensed contractor.

Residential jobs may also need Home Improvement Contractor registration.

Delaware No State License

There’s no state irrigation license. Contractors need a $75 state business license, and non-resident contractors post a 6% bond on contracts over $20,000. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

District of Columbia HIC License May Apply

Issuing Agency: DC Department of Licensing and Consumer Protection (DLCP)

No irrigation license, but residential improvement work on contracts of $300 or more falls under DC’s Home Improvement Contractor license ($25,000 bond), which covers structures and improvements on residential property. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Florida Local Licenses

Florida has no mandatory state irrigation license. The voluntary state irrigation specialty certification was repealed in May 2024, and counties and cities that license irrigation contractors (often through local certificates of competency) are the ones to check.

Watch: HB 611 / SB 508 (2026) would have required licensed irrigation contractors statewide, but it stalled in its first committee. Water management district watering rules and rain sensor requirements still apply to every system.

Georgia No State License

There’s no state irrigation license. Landscaping and irrigation sit outside Georgia’s residential and general contractor licenses, though local business licenses and watering rules apply. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Hawaii C-27 License ($1,500+)

Issuing Agency: Hawaii Contractors License Board

A contractor license (C-27 Landscaping for irrigation work) is required for jobs over $1,500 in labor and materials, or any job needing a permit (HRS 444-2).

Idaho Registration Over $2,000

Issuing Agency: Idaho Division of Occupational and Professional Licenses

No irrigation license, but contractor registration applies once a project tops $2,000, with $300,000 in general liability. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Illinois IDPH Registration

Issuing Agency: Illinois Department of Public Health

What you need: Every irrigation contractor registers annually with the Department of Public Health, and employers register each employee who installs or supervises lawn sprinkler systems (and report when that job ends).

Illinois’ plumbing license law covers the plumbing system itself, so confirm with IDPH who can make the potable water connection and install the backflow device on your jobs.

Indiana No State License

There’s no state irrigation license. Some cities license contractors who pull permits. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Iowa Registration ($2,000+/yr)

Issuing Agency: Iowa Department of Inspections, Appeals, and Licensing

No irrigation license, but contractor registration applies once you earn $2,000 a year in construction, and out-of-state contractors file a $25,000 bond. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Kansas No State License

There’s no state irrigation license. Johnson County, Wichita and other local programs may license contractors or require permits. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Kentucky No State License

There’s no state irrigation license. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Louisiana Irrigation License

Issuing Agency: Louisiana Horticulture Commission (LDAF)

What you need: A landscape irrigation contractor license from the Horticulture Commission, which requires passing an exam built from questions submitted by the Louisiana Irrigation Association and the Department of Agriculture and Forestry.

Larger jobs can also trigger LSLBC rules: home improvement registration from $7,500 and commercial licensing at $50,000.

Maine No State License

There’s no state irrigation license. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Maryland MHIC May Apply

Issuing Agency: Maryland Home Improvement Commission

No irrigation license, but Maryland’s home improvement law covers improvements to land next to a home, including landscaping, so residential irrigation contractors should expect to need an MHIC license. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Massachusetts No State License

There’s no state irrigation license. The Irrigation Association lists Massachusetts among states that have considered licensing. Backflow devices are a plumbing matter, and many towns have watering bans and their own irrigation permits.

Michigan No State License

There’s no state irrigation license. The connection and backflow device follow Michigan’s plumbing code, and many local water systems require backflow testing every year.

Minnesota Check Skill Rules

Issuing Agency: Minnesota Department of Labor and Industry

No irrigation license. Minnesota’s residential contractor license applies only to contractors offering more than one special skill, so a sprinkler-only company typically doesn’t need it. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Mississippi Contractor Rules Apply

There’s no state irrigation license. Commercial projects of $50,000 or more need a certificate of responsibility from the State Board of Contractors. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Missouri No State License

There’s no state irrigation license. Kansas City, St. Louis and other cities may license contractors. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Montana Registration (Employers)

There’s no state irrigation license. Construction contractors with employees register with the Department of Labor & Industry ($70) and carry workers’ comp. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Nebraska Registration Required

There’s no state irrigation license. Every contractor doing business in Nebraska registers with the Department of Labor ($40 a year). The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Nevada C-10 License ($1,000+)

Issuing Agency: Nevada State Contractors Board

An NSCB license is required for work of $1,000 or more, or any job needing a permit, and irrigation systems fall under the landscape contracting classification (C-10). The board sets the bond from $1,000 to $500,000. Southern Nevada Water Authority watering rules apply on top.

New Hampshire No State License

There’s no state irrigation license. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

New Jersey Certification Required

Issuing Agency: NJ Board of Landscape Irrigation Contractors (DCA)

What you need: Individual certification from the Board of Landscape Irrigation Contractors, plus a business permit (no fee, renewed every two years) for any company doing the work. The business must employ a certified landscape irrigation contractor.

Requirements: Pass the Irrigation Association’s Certified Irrigation Contractor (CIC) exam and show three years of experience (about 1,100 hours a year) within the last 15. Fees are $45 to apply, $300 for initial certification and $300 every two years to renew, with 16 CE credits per cycle (8 in water conservation).

Watch out: A home improvement registration doesn’t cover irrigation work. Licensed plumbing contractors are exempt from individual certification but still need the business permit.

New Mexico Confirm With CID

Issuing Agency: New Mexico Construction Industries Division

New Mexico licenses most construction work through CID, and its general classification list has no irrigation class. Confirm with CID whether your irrigation work falls under a mechanical or general classification before you bid. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

New York Local Licenses

There’s no state irrigation license. New York City and Nassau, Suffolk, Westchester, Rockland and Putnam counties license home improvement contractors, and residential sprinkler installs can fall under those licenses. Long Island water districts also have their own irrigation rules.

North Carolina License ($2,500+)

Issuing Agency: NC Irrigation Contractors’ Licensing Board (G.S. 89G)

What you need: A license from the Irrigation Contractors’ Licensing Board to construct, install, expand, service or repair irrigation systems for pay, including low-voltage control wiring. Firms must work under a licensed individual’s direct supervision.

Exemptions: Jobs under $2,500 in labor and materials, homeowners on their own property, agriculture, nurseries and greenhouses, golf courses, and certain other licensed professionals.

Requirements: Three years of experience (two years of training counts as one), a board exam on water conservation and installation, a $10,000 bond or letter of credit, and 10 CE units every year. Missing CE triggers a 60-day suspension.

North Dakota License Over $4,000

There’s no state irrigation license. A state contractor license applies to any job over $4,000. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Ohio No State License

There’s no state irrigation license. Many Ohio cities require contractor registration for permitted work. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Oklahoma No State License

There’s no state irrigation license. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Oregon LCB License

Issuing Agency: Oregon Landscape Contractors Board (LCB)

What you need: Irrigation work is landscaping work in Oregon, licensed by the Landscape Contractors Board, not the CCB. The business needs a landscape contracting business license, and the person doing the work needs an individual Landscape Construction Professional license.

Irrigation Plus Backflow license: Allows irrigation work and backflow device installation. The exam has three sections (laws and business, irrigation, backflow), each needing 75%, and the license is $200 a year.

Pennsylvania HICPA May Apply

There’s no state irrigation license. Contractors doing $5,000 or more of home improvement work a year register under HICPA, which covers improvements to residential property. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Rhode Island Irrigator License

Issuing Agency: Rhode Island Dept. of Labor and Training (R.I. Gen. Laws 5-20)

What you need: A master or journeyperson irrigation license under Rhode Island’s plumbers, irrigators and water system installers law. Master applicants pass a written exam and show eligibility, such as three years registered as a business offering irrigation, or notarized confirmation from three irrigation contractors.

Contractors also register with the Contractors’ Registration and Licensing Board ($500,000 liability insurance).

South Carolina Contractor Rules Apply

There’s no state irrigation license. Commercial work over $10,000 falls under the Contractor’s Licensing Board, and residential specialty contractors register with the Residential Builders Commission. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

South Dakota No State License

There’s no state irrigation license. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Tennessee License $25K+

There’s no state irrigation license. A state contractor license applies to projects of $25,000 or more. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Texas TCEQ License

Issuing Agency: Texas Commission on Environmental Quality (TCEQ)

Licenses: Landscape Irrigator (sells, designs, installs, maintains and repairs systems, including the water supply connection), Irrigation Technician (works under a Licensed Irrigator, with direct supervision for water connections), and Irrigation Inspector (inspections and permits). Backflow testing is a separate license.

Getting licensed: No experience prerequisite. Take the approved Basic Irrigator course, apply ($111), and pass a six-hour exam with 70% on every section. Licenses renew every three years ($111), with 24 CE hours for irrigators and inspectors and 16 for technicians.

Local layer: Larger Texas cities run irrigation permit and inspection programs under TCEQ rules. TCEQ doesn’t require a bond or insurance, but cities and customers may. Homeowners on their own property can be exempt but must still meet the standards.

Utah Check With DOPL

Issuing Agency: Utah Division of Professional Licensing (DOPL)

No irrigation-specific license. Utah licenses contractors for jobs of $7,000 or more (with an insurance affirmation over $3,000), so confirm which landscaping or plumbing classification your irrigation work needs. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Vermont Registration $10K+

There’s no state irrigation license. Residential contracts of $10,000 or more need residential contractor registration with $1,000,000 / $2,000,000 in liability insurance. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Virginia License Over $1,000

Issuing Agency: Virginia DPOR, Board for Contractors

No stand-alone irrigation license, but Virginia’s contractor license applies to jobs over $1,000 (Class C up to $30,000). The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Washington Registration Required

Issuing Agency: Washington Department of Labor & Industries

No irrigation license, but every contractor registers with L&I ($15,000 specialty bond) and carries liability insurance. Backflow assembly testing is certified separately by the Department of Health.

West Virginia Contractor Rules Apply

There’s no state irrigation license. The state contractor license applies at $5,000 residential and $25,000 commercial, but the law excludes landscaping services, so check with the Contractor Licensing Board whether your irrigation work counts. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Wisconsin No State License

There’s no state irrigation license. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.

Wyoming No State License

There’s no state irrigation license. The connection to the potable water supply and the backflow preventer follow the plumbing code, so expect a plumbing permit or licensed plumber for that part in most cities.