Contractors / Portsmouth, NH / Plumbing

Plumbers in Portsmouth, NH

Real permit activity. Real contractors. Ranked by volume.

233 plumbing permits were filed in Portsmouth in the last 6 months. These 40 contractors filed them most often. Tap a name for their full permit history.

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  1. 1William Martin6 in last 90 days12
  2. 2Dufresne Plumbing & Heating LLC6 in last 90 days11
  3. 3MacCo3 in last 90 days10
  4. 4Bath fitter5 in last 90 days8
  5. 4James Laurencio5 in last 90 days8
  6. 4Pettigrew Plumbing & HVAC3 in last 90 days8
  7. 7Perry Plumbing and Heating4 in last 90 days6
  8. 7Daniel Kellogg2 in last 90 days6
  9. 7Hart Plumbing & Heating2 in last 90 days6
  10. 10Aph3 in last 90 days5
  11. 10Robert W. Piersiak Plumbing & Heating3 in last 90 days5
  12. 12Federal Piping Company Inc4 in last 90 days4
  13. 12Mechanical Concepts Inc4 in last 90 days4
  14. 12Ramsey Plumbing and Heating3 in last 90 days4
  15. 12Scott Killgren2 in last 90 days4
  16. 12William Libby Sr2 in last 90 days4
  17. 12Ben Pettigrewnone in last 90 days4
  18. 18Drummin plumbing2 in last 90 days3
  19. 18Mark Canney2 in last 90 days3
  20. 20Port City Plumbing & Heating2 in last 90 days2
  21. 20A Spolidoro & Sons Inc1 in last 90 days2
  22. 20East Coast Heating and Air Conditioning1 in last 90 days2
  23. 20Eastern Mechanical Contractors, LLC1 in last 90 days2
  24. 20Granite State Plumbing and Heating1 in last 90 days2
  25. 20J Lamport Plumbing & Heating LLC1 in last 90 days2
  26. 20Oliver Mechanical1 in last 90 days2
  27. 20Derek Brownnone in last 90 days2
  28. 20Maguire Brothers Plumbingnone in last 90 days2
  29. 20RPH Incnone in last 90 days2
  30. 20William Shanleynone in last 90 days2
  31. 20cochecho P&HHnone in last 90 days2
  32. 32AC Darois Electric, LLC1 in last 90 days1
  33. 32Strogen's Service Experts1 in last 90 days1
  34. 32Baths By Bill LLC DBA ReBathnone in last 90 days1
  35. 32Baum Plumbingnone in last 90 days1
  36. 32Black Dognone in last 90 days1
  37. 32Dowling Corporationnone in last 90 days1
  38. 32Eric Cookenone in last 90 days1
  39. 32Townsend Energynone in last 90 days1
  40. 32White’s Rentalsnone in last 90 days1

Recent plumbing permits in Portsmouth

  1. Nov 12, 2026Plumb 2.5 bath new construction house up to code. 2 bathrooms on second floor. 1/2 bath on first floor.Ramsey Plumbing and Heating · Plumbing · 1 · #PLMB-26-424
  2. Nov 12, 2026Install plumbing in the basement of the home for a 3/4 bathroom on a Macerating toilet system.William Libby Sr · Plumbing · 1 · #PLMB-26-425
  3. Nov 10, 2026Direct Replace Electric water heaterWilliam Martin · Plumbing · 1 · #PLMB-26-422
  4. Nov 10, 2026Replacing existing faucets in all bathrooms. Locations are staying the same. Replacing kitchen faucet. Replacing existinRamsey Plumbing and Heating · Plumbing · 1 · #PLMB-26-421
  5. Nov 9, 2026Installing new bathroon group in basementDrummin plumbing · Plumbing · 1 · #PLMB-26-419
  6. Nov 6, 2026Install irrigation meter and backflow for lawn irrigation.James Laurencio · Plumbing · 1 · #PLMB-26-418
  7. Nov 6, 2026Addtion of 2nd floor bath room and 3rd floor bar sinkA Spolidoro & Sons Inc · Plumbing · 1 · #PLMB-26-416
  8. Nov 6, 2026Install irrigation meter and backflow for lawn irrigation.James Laurencio · Plumbing · 1 · #PLMB-26-417
  9. Nov 5, 2026Demo existing bathroom, install 2 toilets, install 2 hand sinksFederal Piping Company Inc · Plumbing · 1 · #PLMB-26-414
  10. Nov 4, 2026We will be installing underslab drainage to an ejector pit that will serve (1) utility sink, (3) clothes washers, (2) toPerry Plumbing and Heating · Plumbing · 1 · #PLMB-26-413

How plumbing compares in Portsmouth

Other trades in Portsmouth

Electricians 495HVAC contractors 353Building contractors 257Site work contractors 131Roofing contractors 118Gas fitters 87Window & door contractors 40Deck & porch builders 25Insulation contractors 21

Plumbers nearby

Boston 2334Worcester 968Falmouth 609Plymouth 609Cambridge 591Braintree 435Taunton 394Warwick 371

Get quotes from active plumbing contractors in Portsmouth

Request a quote and we route it to contractors with documented permits here. No ratings invented — you see their permit history first.

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Source: Portsmouth OpenGov. Data updated Nov 13, 2026. A permit shows a job was filed with the town. It doesn’t show whether the work was finished or how it turned out. Rankings are by permit volume.