Contractors / Portsmouth, NH
Contractors in Portsmouth, NH
1,784 permits were filed in Portsmouth in the last 6 months, from the town’s own records. 281 contractors have documented permits here in that period, ranked by permit volume.
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Permit activity in Portsmouth, NH
1,784 permits filed in Portsmouth, NH, last 6 months, by 834 applicants. Directory and leaderboards show the most active contractors in each trade. Counts show permit volume. Tap a trade for its leaderboard.
Contractors by trade in Portsmouth
Electricians 43HVAC contractors 48Building contractors 45Plumbers 40Site work contractors 63Roofing contractors 32Gas fitters 31Window & door contractors 28Deck & porch builders 23Insulation contractors 6
Most active in Portsmouth
William MartinHVAC · Electrical · Plumbing · Gas fitting71 permits in Portsmouth, NH, last 6 months22 in last 90 daysEast Coast Heating and Air ConditioningHVAC · Electrical · Plumbing · Gas fitting65 permits in Portsmouth, NH, last 6 months33 in last 90 daysHart Plumbing & HeatingHVAC · Plumbing · Gas fitting43 permits in Portsmouth, NH, last 6 months16 in last 90 daysPettigrew Plumbing & HVACHVAC · Plumbing · Gas fitting35 permits in Portsmouth, NH, last 6 months19 in last 90 daysBlack DogElectrical · HVAC · Plumbing27 permits in Portsmouth, NH, last 6 months16 in last 90 daysUnitilSite work26 permits in Portsmouth, NH, last 6 months13 in last 90 daysMoss Electric LLCElectrical21 permits in Portsmouth, NH, last 6 months12 in last 90 daysJ. Carnes & Son RoofingRoofing21 permits in Portsmouth, NH, last 6 months8 in last 90 daysMcp HvacHVAC · Electrical21 permits in Portsmouth, NH, last 6 months7 in last 90 daysReviseInsulation · Building · Roofing17 permits in Portsmouth, NH, last 6 months4 in last 90 daysJames LaurencioPlumbing · Gas fitting14 permits in Portsmouth, NH, last 6 months8 in last 90 daysRevision Energy IncElectrical · Solar · HVAC13 permits in Portsmouth, NH, last 6 months7 in last 90 daysEversourceSite work12 permits in Portsmouth, NH, last 6 months4 in last 90 daysDufresne Plumbing & Heating LLCPlumbing11 permits in Portsmouth, NH, last 6 months6 in last 90 daysDaniels Electric Corp.Electrical10 permits in Portsmouth, NH, last 6 months6 in last 90 daysMacCoPlumbing10 permits in Portsmouth, NH, last 6 months3 in last 90 daysRenewal By AndersenWindows & doors10 permits in Portsmouth, NH, last 6 months3 in last 90 daysTrue Bright ElectricElectrical9 permits in Portsmouth, NH, last 6 months7 in last 90 daysAphPlumbing · HVAC · Gas fitting9 permits in Portsmouth, NH, last 6 months5 in last 90 daysKey HVACHVAC9 permits in Portsmouth, NH, last 6 months4 in last 90 daysJeff Bower Electric,LLCElectrical8 permits in Portsmouth, NH, last 6 months5 in last 90 daysBath fitterPlumbing8 permits in Portsmouth, NH, last 6 months5 in last 90 daysRobert W. Piersiak Plumbing & HeatingPlumbing · Gas fitting · HVAC8 permits in Portsmouth, NH, last 6 months4 in last 90 daysScott KillgrenElectrical · Plumbing8 permits in Portsmouth, NH, last 6 months4 in last 90 daysPerry Plumbing and HeatingPlumbing · Gas fitting8 permits in Portsmouth, NH, last 6 months4 in last 90 daysD.F. RicahrdGas fitting7 permits in Portsmouth, NH, last 6 months5 in last 90 daysDowling CorporationHVAC · Gas fitting · Plumbing7 permits in Portsmouth, NH, last 6 months5 in last 90 daysThe Kane CompanyBuilding · HVAC7 permits in Portsmouth, NH, last 6 months4 in last 90 daysWhite’s RentalsElectrical · Building · HVAC · Plumbing7 permits in Portsmouth, NH, last 6 months4 in last 90 daysRiver Birch BuildersBuilding · HVAC7 permits in Portsmouth, NH, last 6 months3 in last 90 days
See all 281 contractors in Portsmouth
Nearby towns · high-demand trades
Boston · Electrical 5,660Boston · Plumbing 2,334Worcester · Electrical 1,803Boston · Roofing 1,192Cambridge · Electrical 1,172Plymouth · Electrical 971Worcester · Plumbing 968Falmouth · Electrical 953Somerville · Electrical 907Warwick · HVAC 812Pittsfield · Electrical 790Warwick · Roofing 729
Other towns we cover
Boston 15,893Worcester 5,962Warwick 4,158Falmouth 3,829Plymouth 3,785Cambridge 3,332Somerville 2,926Cranston 2,816Pittsfield 2,660Attleboro 2,270Lexington 2,156Braintree 2,103
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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.