New Hampshire · Dover branch
HVAC, Plumbing & Electrical in Newington, NH
Veteran-owned HVAC, plumbing & electrical in Newington, NH. High Ground handles salt-air condensers, well testing, sump backup & panel upgrades by Great Bay.
New Hampshire · Dover branch
Veteran-owned HVAC, plumbing & electrical in Newington, NH. High Ground handles salt-air condensers, well testing, sump backup & panel upgrades by Great Bay.
Heating & Cooling
Repairs and maintenance for year-round comfort.
Plumbing
Expert fixes, clean installs, done right the first time.
Electrical
Safe, code-compliant, and expertly handled every time.
A local veteran-owned team, we provide mission-critical installation, repair and maintenance. Because doing it right matters - our work is Guaranteed For Life.
Newington is a small Seacoast peninsula, bounded by Great Bay to the west, Little Bay to the northwest, and the Piscataqua River to the northeast, with water making up better than a third of its twelve square miles. Fewer than a thousand people live here, on a tax base carried by the Pease International Tradeport, the Fox Run retail strip along Route 16, and heavy industry on the river. The homes run from colonials in the Old Town Center historic district, some standing since the 1700s, to newer builds set back on higher ground. Keeping one comfortable and dry here means working with the tides, the salt air, and the bedrock underneath, and it starts with the season the Seacoast is built around.
Winter on the Seacoast is a Nor'easter's playground. The ocean moderates the cold a little, but it feeds the storms that come up the coast, dumps heavy wet snow, and drives wind off the water, and a January cold snap still finds every weak point in an undersized or aging heating system. It usually happens on the coldest night, when a failure is not an inconvenience but a frozen-pipe emergency. We size heating to a real load calculation for the house instead of a rule of thumb, service furnaces and boilers before the season rather than during the first hard freeze, and when a system reaches the end of its life we replace it with equipment matched to a Seacoast winter. Heat that holds through the coldest week is the entire point of owning the system.
Modern cold-climate heat pumps hold their efficiency well below freezing, which makes them a real option even this far north, and paired with backup heat for the hardest snaps they heat, cool, and dehumidify a home from one system. Summer beside the bay is humid, and humidity is where sizing matters most. An oversized air conditioner cools the air fast but shuts off before it pulls the moisture out, leaving the house cool and clammy and prone to musty basements and mold. We size to the actual load, set up the dehumidification properly, and for the older village homes that never had ductwork we add ductless mini-splits that deliver both without tearing plaster walls apart.
Newington's air carries salt. The Piscataqua is one of the fastest tidal rivers in North America, Great Bay pushes brackish water deep inland, and the moisture coming off both is hard on anything metal left outside. Salt speeds corrosion on an air-conditioning condenser's coil and cabinet, on disconnects and outdoor electrical, and on the fasteners holding it all together, which is why equipment near the water can fail years earlier than the same unit set inland. We install condensers and outdoor gear rated for coastal exposure, keep coils rinsed and protected, and place and mount equipment so the salt has less chance to do its work. On the Seacoast, corrosion resistance is not an upgrade, it is the difference between a ten-year system and a five-year one.
Homes here that draw from private wells pull water out of New Hampshire's granite bedrock, and that bedrock is why the state carries some of the highest naturally occurring arsenic in the country, along with radon and uranium that never announce themselves by taste or smell. Newington also learned the hard way what else can reach groundwater. The Haven well at Pease was shut down in 2014 after decades of firefighting foam left PFAS in the aquifer, making it one of the most closely watched contamination sites in the nation. The lesson runs the same either way: you cannot judge water by looking at it. We test for what is actually present instead of guessing, then build the treatment the results call for, from softening and iron filtration to arsenic removal and UV, so the water is safe to drink and your plumbing and appliances last the years they should.
A third of Newington is water, and the land that touches it sits low. Homes on the estuary shore and the flat ground near the bays live over a high water table, and the same Nor'easters that bring the snow bring storm surge and heavy rain that push groundwater against the foundation. A sump pump is the front line, and a sump with no backup fails on its one big test, because the water peaks during the same storm that knocks the power out. We install sump systems sized for real storm volume, add battery or generator backup so they keep running when the grid does not, and address the grading and drainage that let water reach the foundation in the first place.
The colonials in the Old Town Center were framed long before central air, electric ranges, heat pumps, and car chargers existed, and many still run on undersized panels and outdated wiring that were never meant to carry a modern home's load. That is both a safety issue and a hard ceiling on what you can add. We upgrade services to a safe 200-amp panel, replace old wiring with routing that protects plaster and trim, and add the circuits a modern home needs, including a properly installed EV charger, all done to code and inspected. And because Seacoast outages run hours to days when a Nor'easter takes the lines down, we install whole-home standby generators, built to stand up to the salt air, that keep the heat, the water, and the sump pump running on their own until the utility comes back.
The right-sized heating, the coastal-rated heat pump, the well testing and treatment, the sump and its backup, the panel upgrade, and the generator are one licensed, veteran-owned team out of our New Hampshire branch, not five contractors to line up and coordinate. Same-day service where we can, permits pulled and inspections handled, and a lifetime workmanship guarantee behind every bit of it.
When you invite us into your home, we take that responsibility seriously. Every project - big or small, is handled with care, respect, and craftsmanship you can feel. Our Lifetime Workmanship Guarantee means every job is done right — or we make it right, fast.

Every technician undergoes rigorous training and continuous skill upgrades.

“They always kept me updated with the schedule. Made a rather complex job run like clockwork.”
- Dave, NH

“Super quick & professional. Looking forward to working with them in the future. Highly recommend!”
- Enrique, NJ

“Went out of his way to help us with our new house that we’d just purchased with helpful tips.”
- Eric, NH
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Why does my heating struggle on the coldest Newington nights?
Because those storms and cold snaps are the real test, and a Nor'easter drives wind and cold straight off the water. An undersized or aging furnace or boiler keeps up in mild weather and then falls short in a hard freeze. We size heating to a real load calculation and service it before the season so it holds through the coldest week.
Does salt air really shorten the life of my AC or generator here?
Should I test my well water in Newington?
Is my water affected by the Pease PFAS contamination?
Is a heat pump a good idea this close to the coast?
My basement near the bay takes on water in storms. What can you do?
My historic-district home still has a fuse box or old wiring. Can you upgrade it safely?
How fast can you reach my Newington home?
Tell us what you need - we’ll confirm your appointment and get your home back to comfortable, fast.
HOW QUICKLY CAN WE SERVE YOU?
Tell us how to reach you and a real person will call you back to get you scheduled in Newington.
Need someone now? Call (603) 865-1146
The work that comes up most around here. Same team, same guarantee, whichever one you need.
Same team, same guarantee, a short drive away. Find your town for the local details.