Anyone can claim to be the best. On KnownPros, "best" means something specific: these plumbing businesses in Trenton, NJ are ranked by trust score — a transparent measure of reviewed licenses, insurance documents on file, confirmed contact details, and profile completeness. It reflects verification, not workmanship — always get multiple quotes.
Badges on these listings reflect records our team has reviewed — license information
submitted, insurance certificates on file, and confirmed ownership. The trust score
(0–100) measures verification and profile completeness, never workmanship. Placement
can't be bought: results are ordered by distance and verification, and you always
contact businesses directly. Confirm credentials independently before hiring.
Full verification policy →
A plumber installs and repairs water, drain, and gas lines — water heaters, leaks, clogged drains, sump pumps, fixtures, and rough-ins.
Water heater install and repair
Drain cleaning and clogs
Leak and burst-pipe repair
Sump pumps
Fixture and toilet installs
Gas line work
Typical plumbing costs in Trenton, NJ
Planning estimates for guidance — not quotes. Local prices vary by scope, materials, and access.
Job
Typical range
Unit
Service call / diagnosis
$75–$200
per visit
Drain cleaning
$150–$450
per job
Water heater (tank) replacement
$1200–$2500
per installed
Toilet install
$150–$400
per each
Common mistakes to avoid
!Paying for a full pipe replacement when a repair would do
!Not confirming the plumber is licensed for gas work before booking
!Skipping the permit on a water-heater swap (can void insurance)
Also searched: emergency plumber · water heater replacement · drain cleaning · burst pipe repair · sump pump
Questions & answers — Plumbing in Trenton, NJ
QDo I need a licensed plumbing pro in Trenton, NJ?
AIn most states plumbing work requires a licensed or registered contractor — check your state's license lookup before hiring. Each profile here shows whether license and insurance records are on file.
KnownPros Editorial Team
QHow much does plumbing work cost in Trenton, NJ?
AIn the Trenton area, plumbing jobs typically run about $75–$2,500 depending on scope. See the price table on this page for a breakdown by job type. Prices are planning estimates — always get an itemized quote.
KnownPros Editorial Team
QWhat does plumbing work include?
AA plumber installs and repairs water, drain, and gas lines — water heaters, leaks, clogged drains, sump pumps, fixtures, and rough-ins. Common jobs: water heater install and repair, drain cleaning and clogs, leak and burst-pipe repair, sump pumps.
KnownPros Editorial Team
QWhat's the most common plumbing hiring mistake?
APaying for a full pipe replacement when a repair would do Comparing a few verified pros before you commit avoids most of it.
KnownPros Editorial Team
QDo I need a licensed plumbing pro?
AIn most states plumbing work requires a licensed or registered contractor — check your state's license lookup before hiring. Each profile here shows whether license and insurance records are on file.
KnownPros Editorial Team
QHow much does plumbing work cost?
ATypical plumbing jobs in the U.S. run from about $75 to $2,500 depending on the work and materials — for example, service call / diagnosis runs $75–$200 per visit. These are planning estimates, not quotes.
KnownPros Editorial Team
Frequently asked questions
How do I find a plumbing in Trenton, NJ?
Enter your ZIP code and choose Plumbing as the category. You'll see local businesses ranked by distance and verification status, with license and insurance records where available.
Are the plumbing businesses on KnownPros verified?
Each profile shows which records are on file — license information submitted, insurance documents, claimed status, and contact verification. Verification reflects available records and does not guarantee work quality. Always confirm credentials independently before hiring.
Does it cost anything to contact a pro?
No. KnownPros is free for homeowners and property managers. There are no bidding wars and no hidden commissions — you contact businesses directly.
I run a plumbing business in Trenton, NJ. How do I get listed?
If your business already appears here, claim the profile and verify ownership. Otherwise, create a free listing and submit your license and insurance documents for review.
Do I need a licensed plumbing pro in Trenton, NJ?
In most states plumbing work requires a licensed or registered contractor — check your state's license lookup before hiring. Each profile here shows whether license and insurance records are on file.
How much does plumbing work cost in Trenton, NJ?
In the Trenton area, plumbing jobs typically run about $75–$2,500 depending on scope. See the price table on this page for a breakdown by job type. Prices are planning estimates — always get an itemized quote.
What does plumbing work include?
A plumber installs and repairs water, drain, and gas lines — water heaters, leaks, clogged drains, sump pumps, fixtures, and rough-ins. Common jobs: water heater install and repair, drain cleaning and clogs, leak and burst-pipe repair, sump pumps.
What's the most common plumbing hiring mistake?
Paying for a full pipe replacement when a repair would do Comparing a few verified pros before you commit avoids most of it.
Do I need a licensed plumbing pro?
In most states plumbing work requires a licensed or registered contractor — check your state's license lookup before hiring. Each profile here shows whether license and insurance records are on file.
How much does plumbing work cost?
Typical plumbing jobs in the U.S. run from about $75 to $2,500 depending on the work and materials — for example, service call / diagnosis runs $75–$200 per visit. These are planning estimates, not quotes.
Listings reflect the live KnownPros directory. Last updated July 9, 2026.
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