How to Get a Plumbing License in Connecticut (2026 P-1 and P-2 Guide)

Connecticut does not license plumbing companies. It licenses plumbers. That one sentence explains most of what confuses contractors trying to work in this state, and it is stated flatly on the Department of Consumer Protection's own application page: "Only individuals can apply, company applications are not accepted."

At a glance

• Who issues it: Connecticut Department of Consumer Protection (DCP), Occupational and Professional Licensing
• Who can apply: Only individuals can apply, company applications are not accepted
• P-1 hours: 576 classroom hours AND 12,000 hours of on the job training
• Exam: PSI, $59 per portion, passing score is 70 percent
• Fees and renewal: $150 contractor or $90 journeyperson application; renew every October 31

So if you are a tradesperson, the path below is your career ladder. If you are a business owner, the same page is telling you something else entirely: your company will never hold a Connecticut plumbing license, and the only way it performs plumbing work legally is through a licensed individual it employs.

Here is how the ladder actually works in 2026, what the hour requirements really mean, what changed for plumbing businesses on October 1, 2025, and the documentation rule that quietly kills otherwise qualified applications. For the wider picture, start with our Connecticut contractor license overview and the national contractor license pillar.

Who regulates plumbing in Connecticut

Plumbing is regulated by the Connecticut Department of Consumer Protection (DCP), Occupational and Professional Licensing, at 450 Columbus Boulevard in Hartford. The Plumbing and Piping Work Examining Board advises DCP on examinations and licensure.

The governing law is Chapter 393 of the Connecticut General Statutes, "Electricians, Plumbers, Solar, Heating, Piping and Cooling Contractors and Journeymen...", with the scope of plumbing and piping work defined in CGS § 20-330(3) and the license structure in § 20-334a. Under § 20-338 a state license is valid in every town without any municipal licensing or exam. Applicants must be at least 18 with an eighth grade education or its equivalent (§ 20-333(a)).

Two structural points that are easy to get wrong:

• There is no "master plumber" license in Connecticut. The top individual plumbing credential is the P-1 Unlimited Plumbing Contractor. If you are searching for a Connecticut master plumber license, the P-1 is what you actually want.
• The "contractor" in P-1 Unlimited Plumbing Contractor is a person, not a company. A P-1 is an individual license held by a human being, and § 20-334(b) says "No such license shall be transferred to or used by any person other than the person to whom the license was issued." The company is a separate question, covered further down.

The Connecticut plumbing license ladder

Apprentice. Under § 20-334a(a)(3), an apprentice permit authorizes work in the trade for training purposes only, and only under the supervision of a licensed contractor or journeyperson. Apprentices register through the Connecticut Department of Labor Office of Apprenticeship Training, which requires at least 144 hours of related classroom instruction per year and a job site ratio of no less than one journeyperson supervising one apprentice. The state technical education system's current P-2 apprenticeship runs 8,000 hours of on the job training with 720 hours of related instruction. Two clocks matter at the end: § 20-333(b) requires you to apply for the licensure exam within thirty days of finishing, and § 20-334a(a)(4) says the permit expires if you fail to apply for the first licensure examination offered after completing the program.

P-2 Unlimited Journeyperson Plumber. May do all plumbing and piping work as defined in § 20-330, but only while in the employ of a contractor licensed for such work. Qualifying requirement per DCP: completion of a registered apprenticeship program, or equivalent experience and training. The statute, § 20-334a(a)(2)(A), describes a bona fide apprenticeship "including not less than four years' experience in the trade" plus the state exam.

P-1 Unlimited Plumbing Contractor. May do all plumbing and piping work defined in § 20-330. Qualifying requirement: two years as an unlimited licensed journeyperson, or equivalent experience and training. § 20-334a(a)(1)(A) sets the two years and requires out of state journeyperson service to be shown comparable to service here.

That last phrase, "or equivalent experience and training", is the alternate route for out of state tradespeople and anyone who learned the trade outside a registered Connecticut apprenticeship. It has its own, much stricter documentation rules. See below.

Every Connecticut plumbing license type

Connecticut does not stop at P-1 and P-2. DCP's published scope of work list includes a whole set of limited credentials, each paired as contractor and journeyperson (what searchers call a "restricted plumbing license"; the state says limited). Choosing the wrong one is a scope violation. Every journeyperson license works only while in the employ of a licensed contractor.

The hours: what 12,000 actually means

This is the number that trips up applicants, and DCP publishes the correct breakdown in its own charts on the equivalent experience application paths.

For a P-1, the requirement is 576 classroom hours AND 12,000 hours of on the job training. But the 12,000 is not 12,000 hours of apprenticeship. DCP shows the math explicitly:

Read the P-1 row again: 8,000 hours of apprenticeship level training, plus a further two years (counted as 4,000 hours) working as a licensed journeyperson. People who have logged 12,000 hours of raw field time and never held a journeyperson license do not satisfy this. The two years on the journeyperson side is a separate, sequential requirement; it is the same two years § 20-334a(a)(1)(A) demands before you can sit for a contractor exam.

And the classroom hours are not negotiable. DCP's instruction is blunt: "Classroom hours are required. On the job training and work experience will not be considered in lieu of the classroom requirement."

The coursework must also match Exhibit A, Required Courses for Plumbing License Types in both hours and curriculum content. Continuing education certificates and manufacturer certificates do not count. Degrees and classes that are not equivalent do not count.

The documentation trap that fails applications

If you are applying under equivalent experience and training, DCP tells you exactly what it will and will not accept, and this is where otherwise qualified plumbers get rejected:

• Transcripts, degrees and diplomas must show the same number of hours and an equivalent curriculum to Exhibit A.
• Experience must be proven by notarized letters from current or previous employers, stating dates of employment and a specific, detailed description of work covering all aspects of the scope of work.
• "Letters MUST be notarized. Letters that are not notarized will not be accepted."
• "Payroll records, W-2's, or tax returns will not be accepted."
• An out of state apprenticeship certificate must come with documentation of the classroom and on the job hours the program required.

That "no W-2s" line surprises almost everyone. The documents that prove employment in most states are explicitly rejected here. Your former employer has to write and notarize a letter, and if that employer is out of business or unwilling, you have a real problem to solve before you file.

Two more rules worth internalizing: "The Department does not pre-approve or review applications before submission," and "APPLICATION FEES ARE NONREFUNDABLE." Connecticut will take your money, review the package once, and deny it on documentation. Get it right the first time.

Out of state plumbers: no reciprocity, but an equivalency path

DCP's plumbing page states that Connecticut "does not have reciprocal agreements with any other jurisdiction." § 20-333a lets the commissioner waive the exam for licensees from states with substantially similar requirements that return the favor, but no such agreement exists for plumbing, and every individual applicant takes the Connecticut exam.

What does exist is the equivalent out of state license path. DCP defines an equivalent license as one that required "the same number of classroom hours, equivalent classroom curriculum, and on the job training (OJT) hours" as the Connecticut license you want:

One caution on the P-1 row: DCP's contractor page shows 576 classroom hours in its chart but says 720 in the sentence above it, and 720 is what the current state apprenticeship curriculum requires, so ask DCP in writing which figure it will apply before you rely on this path.

You submit a copy of the license, a license verification, the laws and regulations behind it, and its scope of work. DCP reviews one out of state license only and warns that if you cannot prove equivalency the application will not be approved on that basis. Some states license plumbers on fewer classroom hours than Exhibit A, so plenty of experienced out of state plumbers end up on the equivalent experience path instead.

Step by step: from apprentice to P-1

1. Register as an apprentice with the Connecticut Department of Labor. You need a sponsoring employer, must be at least 16, and log related instruction (a minimum of 144 hours per year) alongside your on the job hours; the current P-2 program is 8,000 hours with 720 hours of related instruction.
2. Finish the program and apply to DCP within thirty days (§ 20-333(b)); skip the first exam offered and the permit lapses.
3. Pay the $90 journeyperson application fee (non-refundable). Equivalent experience and out of state applicants attach their documentation here.
4. Schedule the P-2 trade exam with PSI once DCP approves you. Eligibility lasts one year. Pay PSI $59, pass at 70 percent, and send DCP the licensing fee shown on the passing score report: $120 for a journeyperson under § 20-335.
5. Work two years as a licensed P-2 in the employ of a licensed contractor, renewing each October 31 ($120) and, from your second renewal, keeping up continuing education.
6. Apply for the P-1 with the $150 contractor application fee. Two years as a P-2 is the direct path; equivalent experience and training or an equivalent out of state license are the alternatives.
7. Pass both PSI portions, the P-1 trade exam and Business and Law, $59 each at 70 percent. A passed portion stays valid two years while you clear the other.
8. Pay the $150 initial contractor license fee, then renew every October 31 at $150 with five hours of continuing education every two years.

For how the calendar plays out in practice, see our national breakdown of how long a contractor license takes.

The exam: PSI, and how the two portions work

DCP contracts examinations for the occupational trades, including plumbing, to PSI Services LLC. DCP's own Exams page says so, and PSI publishes a Connecticut Plumbing Trades Candidate Information Bulletin for DCP occupational licensing (updated February 4, 2026). Per that bulletin:

• Journeyperson candidates are required to pass only a trade portion.
• Contractor candidates are required to pass both a trade portion and a business and law portion.
• Passing score is 70 percent on every portion.
• The examination fee is $59 per portion, paid to PSI, whether it is a first attempt or a retake. Registration fees are not refundable or transferable.
• Eligibility is valid for one year from the date the State approves your application, with unlimited attempts inside it.
• For contractors, a passed portion score stays valid for two years. Pass business and law, and you have two years to pass the trade portion before the business portion expires. If you later add a second contractor license and have not passed the business portion within the past two years, you retake it along with the new trade portion.

The P-1 exam leans hardest on drain, waste and vent (14 of 80 items), gas systems (9) and isometric analysis (9). Connecticut PSI test centers are in West Hartford (1245 Farmington Avenue) and Milford (500 BIC Drive), with additional sites in Massachusetts (Auburn, Charlestown in Boston, Fall River and West Springfield) that Connecticut candidates can use.

Fees and renewal dates

Verified against DCP's Plumbing and Pipefitting Work page, the PSI bulletin and §§ 20-333 and 20-335:

Note the renewal date. Connecticut's plumbing licenses run to October 31, while heating, cooling and sheet metal licenses run to August 31. If you hold licenses in both families, and plenty of mechanical contractors do, you are managing two different annual deadlines.

§ 20-335 gives a short grace: the board may still renew if the application arrives no later than one month after expiration, but § 20-341 makes wilfully working after expiration a class B misdemeanor, so treat October 31 as hard. A license lapsed more than two years is reinstated only by meeting the § 20-333 requirements again. DCP also publishes reinstatement and reapplication paths and a Retiree Status license; confirm the current form with DCP before you let anything lapse.

Continuing education

Connecticut plumbers renew every year but complete continuing education on a two year cycle. DCP's Plumber Continuing Education page sets the hours, and § 20-334d(c) caps what the regulations may require at seven hours every two years absent major code changes.

The window closes three months before renewal, CE is not required before your first renewal, courses must be approved by the Plumbing Board, and you keep the certificates for at least four years in case of a DCP audit. Failure to complete can bring civil fines and suspension or revocation.

The business question: who holds the license for the company?

Now the part that matters if you are not just chasing a card for yourself.

Connecticut issues no plumbing license to a company. DCP says it twice, on the plumbing page and on the heating and cooling page: only individuals can apply, company applications are not accepted. There is no LLC license, no corporate plumbing license, no business plumbing permit at the state trade level.

The statute makes the company's position precise. § 20-337, Ownership of businesses: "Nothing in this chapter shall require that the ownership or control of a business engaged in providing the work or services licensed under the provisions of this chapter be vested in a person licensed under this chapter, but all the work and services set forth in section 20-330 shall be performed by persons licensed for such work or occupation under this chapter." The owner does not have to be a plumber, but every hour of plumbing work has to be done by a licensed one. Add § 20-334(b), which forbids a license being used by anyone other than its holder and requires the license number on every commercial vehicle, advertisement, bid, contract and invoice (fines up to $500 per violation after the first), and § 20-341(a), which makes it a class B misdemeanor to wilfully employ or supply for employment a person who does not hold the license the work requires.

What a Connecticut plumbing business needs, then, is a licensed individual attached to it. A P-2 journeyperson may work "only while in the employ of a contractor licensed for such work." A P-1 is the license that lets the work be sold and performed. If the P-1 leaves, the work stops being legal, not eventually, immediately.

What changed on October 1, 2025. Until then, larger commercial firms carried a second layer. Chapter 393b defined a "mechanical contractor" at § 20-341s(2) as a business "regularly offering to the public the services of its employees licensed to perform plumbing and piping work or heating, piping and cooling work," carved out businesses working exclusively on residences of not more than four units and businesses employing fewer than ten licensed persons, and § 20-341t required a certificate of registration before such a firm could offer the work.

Public Act 25-111, § 56, repealed §§ 20-341s through 20-341bb effective October 1, 2025. DCP's registration page now carries one line: "Per Public Act 25-111, the law requiring registration for Mechanical Contractors has been repealed effective October 1, 2025." If an older guide tells you to register your plumbing company as a mechanical contractor, that requirement no longer exists. Even the repealed definition placed the license with "its employees licensed," never with the company.

One more correction to a common claim: Home Improvement Contractor registration ($220, expiring March 31 each year, with at least $20,000 of liability insurance) is required for businesses contracting with consumers for home improvement work, but DCP's own page says home improvement "does not include ... Work that is covered under the scope of a trade license." Plumbing performed under a plumbing license does not by itself trigger the HIC registration; a company that also sells bathroom remodels, additions or other work outside the plumbing scope does need it.

What this means for contractors expanding into Connecticut

If you are a plumbing company owner who is not personally a P-1, you have exactly three options, and only three:

1. Earn the P-1 yourself. 576 verified classroom hours, 12,000 hours structured as 8,000 plus two licensed journeyperson years, notarized documentation, and both PSI portions. Realistically a multi year project if you are starting from outside the state's apprenticeship system.
2. Do not perform plumbing work. Subcontract it to a licensed plumbing contractor and accept the margin loss and the scheduling dependency.
3. Employ a licensed P-1 who serves as your qualifier. The license stays with the person, the person works for your company, and your company can sell and perform plumbing work legally under § 20-337.

Option three is what a qualifying agent is. The word Connecticut uses is simply "employ," but the structure is identical to the qualifier, qualifying party, responsible managing employee and designated supervisor arrangements other states name explicitly, a comparison we lay out in our national guide to whether a qualifier must be an owner or an employee.

Every qualifier The Licensing Company places is a full time W-2 employee of the client company who actually supervises the work, because Connecticut's statutory language, "in the employ of a contractor licensed for such work," describes a person genuinely working for the business, and that is the only structure that survives a DCP audit. Marshall Schofield and Jeremiah Jaskulski built the company around that reading of the law, which is why we walk a client through § 20-337 and § 20-334(b) before we walk them through a candidate. If your business needs a Connecticut P-1 on the payroll, start at hire a qualifying agent.

Frequently asked questions

How much does a Connecticut plumbing license cost? The state side numbers are public and fixed: $150 contractor or $90 journeyperson application, $59 per PSI examination portion, $150 or $120 for the initial license after you pass, and $150 or $120 at each annual renewal. What varies enormously is everything around them: classroom hours, notarized documentation, CE courses and the years of journeyperson time. If your question is really about getting a company able to do plumbing work in Connecticut, that depends on your trade mix, the states you are entering, your volume and your risk profile; start with our consultation packages.

How long does it take to become a plumber in CT? For someone starting fresh, the registered apprenticeship is 8,000 hours of on the job training, roughly four years of full time work, and the P-1 needs two further years as a licensed P-2. For an experienced plumber applying under equivalent experience and training, the binding constraint is usually documentation, not time: notarized employer letters and proof of 576 hours of Exhibit A equivalent classroom instruction, plus PSI scheduling and DCP review.

What is a P-2 plumbing license? The P-2 Unlimited Journeyperson Plumber license. It covers the full § 20-330 scope of plumbing and piping work, but only while the holder is employed by a licensed contractor. It is earned by completing a registered apprenticeship (or equivalent experience and training) and passing the 70 question PSI trade exam, and two years as a licensed P-2 is the direct route to the P-1.

Is there a restricted or limited plumbing license in Connecticut? Yes, though the state says "limited," not "restricted": P-6 and P-7 (sewer, storm and water), P-8 and P-9 (gasoline tank piping and pumps), J-1 and J-2 (well pumps and water conditioning), J-3 and J-4 (lawn sprinklers), PP-1 and PP-2 (process piping) and SP-1 and SP-2 (spa and pool). Each has hard scope boundaries and its own hour chart.

Can my LLC hold a Connecticut plumbing license? No. DCP states that only individuals may apply and that company applications are not accepted. Your LLC performs plumbing work through licensed individuals it employs, under § 20-337. The mechanical contractor registration larger firms once filed under Chapter 393b was repealed effective October 1, 2025.

Is there a master plumber license in Connecticut? No. Connecticut's structure is apprentice, then P-2 unlimited journeyperson, then P-1 unlimited plumbing contractor. "Master plumber" is not a Connecticut license type.

Do I need a license to replace a water heater in Connecticut? Water heater work falls within plumbing and piping work as defined in § 20-330, which means it requires an appropriately licensed person, and § 20-338c bars starting before any required permit is pulled. Check the scope of your specific license type first; Connecticut's limited licenses have hard boundaries, and working outside your scope is a violation.

Do apprentices renew anything? Yes, but with the Labor Department, not DCP. An apprentice works under a card of registration from the Connecticut Department of Labor (§ 20-334(a)), and the state technical education system will not seat you in related instruction without a current card: one issued for your present employer, signed by the Labor Department apprentice program manager, and carrying an expiration date of June 30 of the following year. Keep that card current every year and update it when you change sponsors. DCP itself has no annual apprentice renewal; its clock is the § 20-334a(a)(4) rule that the permit expires if you skip the first licensure exam offered after you finish the program.

What if my qualifier quits? Then your company's legal capacity to perform plumbing work leaves with them. This is the risk almost nobody plans for until it happens; we walk through it in our contractor qualifier contingency plan.

Sources

• Connecticut DCP, Plumbing and Pipefitting Work (retrieved 2026-09-24)
• Connecticut DCP, Plumbing Licenses and Scope of Work (retrieved 2026-09-24)
• Connecticut DCP, Plumbing Contractor, Equivalent Experience and Training (retrieved 2026-09-24)
• Connecticut DCP, Plumbing Journeyperson, Equivalent Experience and Training (retrieved 2026-09-24)
• Connecticut DCP, Plumbing Contractor, Equivalent Out of State License (retrieved 2026-09-24)
• Connecticut DCP, Plumbing Journeyperson, Equivalent Out of State License (retrieved 2026-09-24)
• Connecticut DCP, Plumber Continuing Education (retrieved 2026-09-24)
• Connecticut DCP, Heating, Cooling and Sheet Metal Work licenses (retrieved 2026-09-24)
• Connecticut DCP, Mechanical Contractor Registration (repeal notice) (retrieved 2026-09-24)
• Connecticut General Statutes, Chapter 393b as it stood before repeal (2023 revision, §§ 20-341s and 20-341t) (retrieved 2026-09-24)
• Connecticut DCP, Plumbing and Piping Work Examining Board (retrieved 2026-09-24)
• Public Act 25-111, Substitute Senate Bill 1357, Sec. 56 (retrieved 2026-09-24)
• Connecticut DCP, Home Improvement Contractor (retrieved 2026-09-24)
• Connecticut DCP, Exams (retrieved 2026-09-24)
• PSI Services LLC, Connecticut DCP Occupational Licensing, Plumbing Trades Candidate Information Bulletin (updated February 4, 2026) (retrieved 2026-09-24)
• Connecticut General Statutes, Chapter 393 (§§ 20-330, 20-333, 20-333a, 20-334, 20-334a, 20-334d, 20-335, 20-337, 20-338, 20-338c, 20-341) (retrieved 2026-09-24)
• Connecticut Technical Education and Career System, Plumbing Apprenticeship Information Packet 2025 to 2026 (retrieved 2026-09-24)
• Connecticut Department of Labor, Apprenticeship Standards (retrieved 2026-09-24)
• Connecticut Department of Labor, Apprenticeship Frequently Asked Questions (retrieved 2026-09-24)

Before you file

Every fee, hour and requirement above was verified against the Connecticut Department of Consumer Protection's published licensing pages, the Connecticut General Statutes (Chapter 393 and Public Act 25-111), and PSI's current Connecticut Plumbing Trades Candidate Information Bulletin on September 24, 2026. These figures are set by the Department, the legislature and the testing vendor, and they change. Verify current amounts and requirements with DCP at DCP.OccupationalProfessional@ct.gov and with PSI before you file or pay anything.

If your problem is not "how do I get licensed" but "how does my company get licensed work done in Connecticut without waiting years," that is the problem we solve. Call 615-219-2110 to talk it through with our team, see hire a qualifying agent, browse the state licensing guides, or read the Connecticut contractor licensing overview. Licensed P-1 contractors interested in serving a company as its full time W-2 contractor of record can read about becoming a qualifying agent.