8 of Middlesex County's 76 plumbers and heating and cooling contractors are listed for sewer line work.
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A contractor is listed for a service when its owner picked the service, when its Google Business Profile category names it, or when its business name does. Ranked as on the county page: verified owner, then a Google rating of 4.0 or higher, then review count, then fleet size. How ranking works
Ranges are national; ask contractors near you.
Figures checked September 2026.
New Jersey licenses master and journeyman plumbers through its State Board of Examiners of Master Plumbers.1, 2, 3 Ask a heating and cooling company in New Jersey which licenses it holds, and check each one with the office that issued it. Your local building department in New Jersey can tell you whether replacing a water heater, furnace or AC needs a permit.
