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Electrical, Plumbing, Cleaning, & Handyman Company Serving Derry NH
Residential & Commercial HVAC Services in Derry, New Hampshire
Cornerstone Services provides HVAC services in Derry, NH for homes and businesses across the area, backed by over 20 years of heating and cooling experience. Our licensed and insured technicians handle everything from furnace repair and air conditioning installation to ductless mini split systems, heat pump service, air duct cleaning, and indoor air quality work. Every job runs through a single provider under one warranty and one pricing structure. That’s why more than 1,250 customers across Google, HomeAdvisor, Facebook, and Yelp have given us five-star reviews. Whether it’s a heating emergency at midnight or a routine cooling tune-up, one call handles it.
Need HVAC services in Derry, NH today? Call (603) 874-1402 to schedule same-day service or speak with our on-call team any time.
Air Conditioning Repair & Installation in Derry, NH
New Hampshire summers hit harder than many expect, and a failing AC system during a heat wave isn’t a scheduling problem. It’s urgent. Our licensed and insured technicians respond fast, with service vehicles staged from multiple locations so we arrive when we say we can. Same-day scheduling is available for customers who can’t wait.
We handle the full range of cooling needs: AC repair, AC installation, AC maintenance, ductless mini split installation, air duct cleaning, and indoor air quality services. Ductless mini split systems are a strong option for homes without existing ductwork or for additions that need zone-controlled cooling. Whatever the situation, we come prepared to diagnose it and fix it on the same visit whenever possible.
Our Comprehensive AC Services
- AC Services
- AC Repair
- AC Installation
- AC Maintenance
- Mini Splits
- Air Duct Cleaning
- Indoor Air Quality
Furnace Repair, Installation & Heat Pump Service in Derry, NH
A heating system failure in a New Hampshire winter isn’t a minor inconvenience. It’s an emergency. Late-season breakdowns are especially common because systems have been running hard through the coldest months. Our team handles furnace repair, furnace installation, furnace maintenance, and heat pump repair and installation, and we work with all major brands and models. Same-day service is available for urgent heating calls, and our on-call staff are reachable for scheduling or immediate needs.
Heat pumps deliver both heating and cooling from a single system and are a smart fit for New England climates. Today’s cold-climate models are built to perform even in subfreezing temperatures. If you’re considering one for the first time or your current heat pump needs attention, our technicians can walk you through your options and handle the installation or repair. Preventive furnace maintenance is also worth scheduling before winter arrives. It extends system life, improves efficiency, and reduces the chance of an emergency call when temperatures drop.
Our Heating Services
- Furnace Services
- Furnace Repair
- Furnace Installation
- Furnace Maintenance
- Heat Pumps
What Sets Cornerstone Services Apart for HVAC in Derry, NH
We price by the job, not the hour. The number we quote you before the work starts is the number you pay when it’s done: no hourly overruns, no surprise line items. Every completed job is also backed by a signed workmanship warranty under our quality assurance policy, so you have documented protection on the work we perform.
Our operational commitments, in plain terms:
- Background-checked technicians - every worker sent to your property has passed a background check before arriving
- On-time arrival - our vehicles are staged from multiple locations and our scheduling system is built specifically around punctuality
- Same-day service - available for customers who need an HVAC technician quickly
- 24/7 availability - our team is reachable around the clock for scheduling, questions, or urgent calls
- Tidy job sites - technicians clean up after every job
- Financing available - ask about current terms when you schedule
- Monthly promotions - rotating offers each month for savings on scheduled services
More than 1,250 five-star reviews across Google, HomeAdvisor, Facebook, and Yelp show how these commitments play out on the job. That track record was built one visit at a time, and it’s what we stand behind every time we schedule a call in Derry, New Hampshire.
Beyond HVAC: Additional Services We Offer
Our single-provider model means HVAC is just one part of what we handle. In addition to heating and cooling, we offer plumbing services, home modifications, and electrical services through one call, under the same warranty and pricing structure. Our home modifications service line covers wheelchair ramp installation, grab bar installation, stairlift installation, kitchen modifications for elderly residents, and smart home setup for elderly and disabled clients. You don’t need to coordinate multiple contractors when everything is handled by the same team.
Contact us today at cornerstoneservicesne.com/contact or call (603) 874-1402 to schedule an appointment and experience the Cornerstone Services difference.
No hourly overruns, no hidden fees. Every job is backed by a signed workmanship warranty.
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HVAC Services
1,250+ Five-Star Reviews & Counting
We let our work speak for itself. From quick repairs to major installs, our customers say it best.
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Paul Quinn did electrical work for me and he was the best!Nicola Sullivan
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Michael with Cornerstone Services was excellent to work with.Jamie Fasbender
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He was very professional and explained all that he was doing.Mary Duford
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Showed up as agreed and was very informative.John Cote
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Fast response and very professional.Anne Butterworth
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On time. Thorough. Kind. Positive attitude in this awful heat.N N
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Cornerstone came promptly and fixed them.Marilyn Frank
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He and his partner PJ worked quickly and efficiently to solve a dryer vent issue we had been experiencing.Pierre Thelusma
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Took care of our electrical needs with ease!Peter Larocque
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He was quick, thorough, professional, and made sure everything was done right.Jess Nichol
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10/10 experience and so happy we got in touch with him and this company!Anthony Capozzi
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They were so neat, you would never know there was a problem.Bill Mullen
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Paul is always friendly, polite, and professional.Cindy Marcin
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Paul was efficient and expert at correcting the problem and ensuring all was well.Woodrow Cook
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He went above and beyond for me when some unforeseen issues arose with my bathtub install.Susan Hevey
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Tech was on time, friendly, and competent.Vincent JJ Balukonis
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He was very thorough and quickly corrected the issue.Gary Chisholm
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Josh was very prompt with his services and explained things clearly.Kim Mcanany
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Arnold is a pleasure to work with.Esther Bradbury
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Jason is always great and knowledgeable and friendly.Mark Duell