Cornerstone Services – Electrical, Plumbing, Heat/Cool, Handyman, Cleaning
Standby generators, transfer switches, panel upgrades and heating and cooling work in Salem, New Hampshire, with service open around the clock, every day.
What they do
The business installs standby generators and transfer switches, and upgrades electrical panels when a home needs more capacity for a generator. Generator maintenance covers oil and filter changes, battery inspection and load testing. Its heating and cooling work includes furnaces, boilers, heating repair and air conditioning, and it also installs and services sump pumps. Work is based in Salem and covers southern New Hampshire and northern Massachusetts. Emergency service is offered, and the business is open around the clock, every day. Jobs are priced before work begins, each job carries a signed workmanship warranty, and financing is available. Crews clean up the work area after each job.
- Sump pumps
- Generators
- Furnace repairs and installs
- Boiler service
- Heat pumps
- Ductless mini-splits
Listed under Backup power, Basement flooding and sewer backup, Heating and cooling emergencies
Where they work
What we checked
Checked 12 Nov 2026, from public sources.
Not yet verified. We haven’t contacted this business yet. Ask for a written quote before work starts.
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