Contact JP Karos
Call the line, send the form, or flag down the van. All three work.
24/7 emergency line
It's urgent
No heat, burst pipe, gas smell after the utility check? Call now. The emergency line answers around the clock.
Call (603) 362-3409- 24/7 emergency line
- Estimate and form replies the same business day
- Mitsubishi Diamond Contractor · Licensed NH, MA, ME · 21 years in the trade
Government / sub-bid inquiry
Sub-bid & capability requests
Tell us the solicitation or project, the scope, and your timeline. We'll respond with licensure, insurance, and relevant past performance. Our full capability details are on the Government page.
The shop
Based in East Hampstead, moving to the Portsmouth area.
25 Webber Rd, East Hampstead, NH 03826
You'll talk to the crew that does the work, never a call center.
Licensed and insured in New Hampshire, Massachusetts, and Maine
Fastest route: skip the form and price your swap now.
Plug in what you have. See the range, the rebate, and the monthly line. Then pick a morning that works.
- 21+
- Years in the trade
- 3
- States licensed
- 7
- Licenses held