How to Choose a Plumber in New Jersey: 8 Things to Check Before You Hire
By Mike Holt, NJ Master Plumber · August 15, 2024 · 4 min read · Updated November 1, 2026
Quick answer
Choose a plumber who works under a New Jersey master plumber license you can verify, carries insurance, and has steady, recent reviews that mention real jobs. A good plumber explains the problem, gives you a firm price before starting, pulls permits when the job needs one and puts the warranty in writing. Ask about service-call and emergency fees up front.
Want us to take a look? We find the cause and give you written upfront flat-rate pricing options before any work starts.
A good plumber fixes the problem once, tells you the price before starting and stands behind the work. The hard part is telling who that is before you've hired them. Here's what to check, in the order we'd check it ourselves. If you'd rather know what to avoid, read mistakes to avoid when hiring a plumber.
What should you look for in a plumber?
| Check | What good looks like | How to verify |
|---|---|---|
| License | Active New Jersey master plumber license | Look up the number with the NJ Division of Consumer Affairs |
| Insurance | Liability insurance, plus workers' comp for employees | Ask for a certificate of insurance |
| Reviews | Steady, recent reviews that mention specific jobs | Google and other review sites |
| Pricing | A firm price after diagnosis, before work starts | Ask how they price before they arrive |
| Fees | Service call and emergency fees stated up front | Ask on the phone |
| Permits | Pulls permits for jobs that need them | Ask which jobs need one |
| Warranty | Written warranty on parts and labor | Read the invoice |
| Communication | Explains the problem and your options clearly | Your first phone call tells you a lot |
Why does the license number matter?
In New Jersey, plumbing work has to be done under a licensed master plumber. The license means someone passed the state exam and is responsible for the work meeting the plumbing code. It also matters for permits, inspections and insurance claims. Ask for the number and look it up. A company that hesitates to give it is telling you something. Our NJ plumbing codes guide explains when permits and inspections apply.
What do reviews tell you?
Read what the reviews say as well as the star rating. Good signs are recent reviews that name the job (a water heater, a sewer backup, a leak under the slab) and mention that the price matched what was quoted. Watch how the company answers a bad review. A calm, specific reply is a good sign. A long gap with no reviews, or a burst of vague five-star reviews all at once, is worth a second look. Our guide on how to find an honest plumber covers what to ask next.
How should a plumber price the job?
You should know what you'll pay before work starts. Many companies, including ours, charge a service call to come out, and some waive it if you go ahead. Ours is $49, which covers the trip and is waived if you go ahead with the work. Ask what an emergency call costs too. Outside regular hours, emergency service requires a $250 upfront emergency fee. When paid, the standard $49 service fee is waived. During regular hours there is no emergency fee. Additional repairs are quoted before work begins. We respond immediately upon contact; dispatch and arrival depend on availability and location.
Be careful with a quote that's far below the others. It often leaves out parts, permits or the real fix. Our article on low plumbing bids explains what usually gets cut.
What questions should you ask before you hire?
- What's your master plumber license number?
- Are you insured, and can you send the certificate?
- What's the service call fee, and is it waived if I go ahead?
- Is there an emergency fee, and how does it work?
- Will I get a firm price before you start?
- Does this job need a permit, and will you pull it?
- What warranty do you give, and is it on the invoice?
- Who will actually come to my house?
Why does a local plumber matter?
A plumber nearby knows the older housing stock in the area and will still be around if something needs a second look. Central New Jersey has homes with original cast iron drains, galvanized supply pipe and clay sewer lines, and someone who sees them every week knows what to check.
How do we measure up?
Plumbing Doctor is a veteran-owned company in Somerset, NJ, led by NJ Master Plumber Mike Holt (Lic. #36BI01345600), with 25 years in the trade. We're licensed, bonded and insured. Written upfront flat-rate pricing options. You choose. Most company-supplied materials and repairs come with a 1 year parts and labor warranty. Client-supplied materials are not covered under our warranty. Read our reviews and guarantees, or call 908-873-6686 for service anywhere in Central New Jersey.
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Stop and call us if
- You need a licensed plumber in Central New Jersey and want written upfront flat-rate pricing options before any work starts.
- You have a quote from another company and want a second opinion.
- The job needs a permit, like a water heater, gas line or sewer line replacement.
Call 908-873-6686.
Michael Holt
Owner and operator of Plumbing Doctor, NJ Master Plumber (Lic. #36BI01345600) and U.S. Marine Corps veteran.
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