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Home Services in Windham, NH

Full-Service Electrical, HVAC, Plumbing & More

Cornerstone Services is a home services company that serves homeowners and businesses in Windham and the surrounding southern New Hampshire region. We handle HVAC alongside electrical, plumbing, cleaning, and handyman work under one roof, so one call takes care of whatever the job turns up. That's not just a tagline. It's how we've earned more than 1,250 five-star reviews across Google, HomeAdvisor, Facebook, and Yelp over more than 20 years in business. Our team is available around the clock.

Ready to schedule HVAC, home modifications, electrical, or plumbing service in Windham, NH? Call us at (603) 874-1402, and we'll work to get someone out the same day.

Commercial & Home Services We Provide in Windham, NH

New Hampshire winters run hard from late fall through early spring, and summers in Rockingham County bring humidity and temperatures that can reach into the 80s and occasionally the 90s. That kind of year-round climate stress means your heating and cooling systems work in both directions, and a problem in either season can't wait. Our HVAC services cover the full range of what Windham homeowners need, from older builds running boilers or furnaces to newer construction suited for heat pumps and ductless mini-splits.

Our heating and cooling services include:

  • Furnace repair and installation
  • Boiler installation and repair
  • Heat pump repair and installation
  • Air conditioning repair and installation
  • Ductless mini split installation
  • Indoor air quality solutions
  • Dryer vent cleaning
  • AC tune-up and maintenance
  • Heater maintenance and replacement
  • Emergency HVAC repair

Whether you're dealing with a furnace that stopped working overnight or planning a mini-split installation before the next season, we handle it. Emergency HVAC repair is available around the clock for situations that can't wait.

Our multi-trade home service company also offers services that include and aren't limited to:

What Sets Cornerstone Services Apart for Home Services in Windham

Hiring a home services company means letting someone into your home, handing over money, and trusting the work holds up. We've built our service model around removing the friction points that make that uncomfortable.

  • Flat Per-Job Pricing
    We price by the job, not by the hour. The number we quote you is the number you pay at completion. No adjustments when the job takes longer than expected, no hidden fees, no surprises on the invoice.
  • Signed Workmanship Warranty
    Every job we complete is backed by a signed warranty under our quality assurance policy. You get documented protection on our work, not just a verbal assurance.
  • Background-Checked Workers
    Every technician we send to your property has passed a background check before entering your home or business.
  • Same-Day & 24/7 Availability
    Our on-call staff is available around the clock. Same-day scheduling is available for customers who need help quickly. Call us and we'll work to get someone out that day.
  • The Multi-Trade Advantage
    HVAC jobs sometimes uncover electrical or plumbing issues, and vice versa. With Cornerstone Services, you don't coordinate a second contractor with a separate quote and a separate warranty. Electrical, plumbing, HVAC, cleaning, and handyman services are all available through one company, under one pricing structure and one warranty.

We also run monthly promotions on scheduled services. Ask about current offers when you call to schedule.

Fast Response for Windham, NH Homeowners

Our service vehicles are staged on-call from multiple locations across southern New Hampshire and northern Massachusetts. That staging means we're not dispatching from a single hub when a Windham homeowner calls. We serve residential and commercial clients throughout Rockingham County, and our scheduling system is built specifically to support on-time arrivals. If you need home services in Windham you won't be waiting on a company that treats your area as an afterthought.

Frequently Asked Questions

How is your pricing structured?

We price every job at a flat rate. The quote you receive is the price you pay at completion. We don't bill by the hour, so there are no overruns if the work takes longer than expected.

Is your work guaranteed?

Yes. Every completed job is backed by a signed workmanship warranty under our quality assurance policy, giving you written documentation of our commitment to the work.

Can you come out nights or weekends?

Our on-call staff is available around the clock. Scheduling and emergency service aren't limited to business hours.

How quickly can you get to me?

Same-day service is available for customers who need a fast response. Call us to check availability for your specific job and location in Windham.

Schedule HVAC, Handyman, Electrical, or Plumbing Service in Windham Today

Getting your home repairs and upgrades handled shouldn't mean juggling multiple contractors or bracing for a bill that doesn't match the quote. Same-day service is available, our staff is on-call 24/7, and the price we quote is the price you pay.

Call Cornerstone Services at (603) 874-1402 to schedule your home service in Windham, NH. 

The Price We Quote is the price you pay at completion, every time.

No hourly overruns, no hidden fees. Every job is backed by a signed workmanship warranty.

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1,250+ Five-Star Reviews & Counting

We let our work speak for itself. From quick repairs to major installs, our customers say it best.
5
Based on 1,250+ reviews
    "Paul was by far the best one"
    Paul Quinn did electrical work for me and he was the best!
    Nicola Sullivan
    "Excellent to work with"
    Michael with Cornerstone Services was excellent to work with.
    Jamie Fasbender
    "He was very professional"
    He was very professional and explained all that he was doing.
    Mary Duford
    "A job well done!"
    Showed up as agreed and was very informative.
    John Cote
    "Fast response and very professional"
    Fast response and very professional.
    Anne Butterworth
    "Entire AC Unit Redone"
    On time. Thorough. Kind. Positive attitude in this awful heat.
    N N
    "I couldn’t be happier"
    Cornerstone came promptly and fixed them.
    Marilyn Frank
    "Overall, a Great Experience"
    He and his partner PJ worked quickly and efficiently to solve a dryer vent issue we had been experiencing.
    Pierre Thelusma
    "Excellent Service, Very Cordial"
    Took care of our electrical needs with ease!
    Peter Larocque
    "Paul from Cornerstone was fantastic!"
    He was quick, thorough, professional, and made sure everything was done right.
    Jess Nichol
    "Nothing but a wonderful experience"
    10/10 experience and so happy we got in touch with him and this company!
    Anthony Capozzi
    "Did an Excellent Job Finding a Leak"
    They were so neat, you would never know there was a problem.
    Bill Mullen
    "Paul is always friendly, polite, and professional"
    Paul is always friendly, polite, and professional.
    Cindy Marcin
    "All Went Smoothly and Efficiently"
    Paul was efficient and expert at correcting the problem and ensuring all was well.
    Woodrow Cook
    "Robert Did Fantastic Work"
    He went above and beyond for me when some unforeseen issues arose with my bathtub install.
    Susan Hevey
    "New customer"
    Tech was on time, friendly, and competent.
    Vincent JJ Balukonis
    "Jason did a fantastic job"
    He was very thorough and quickly corrected the issue.
    Gary Chisholm
    "Very Prompt and Clear Service"
    Josh was very prompt with his services and explained things clearly.
    Kim Mcanany
    "Great job, appreciate the care"
    Arnold is a pleasure to work with.
    Esther Bradbury
    "Jason is always great and knowledgeable"
    Jason is always great and knowledgeable and friendly.
    Mark Duell
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Questions We Hear Before Every Job

Do you charge by the hour?
No. Every job is priced by the job, not the hour. We give you a flat rate before the work begins, and that number doesn't change at completion, regardless of how long it takes.
What trades do you handle?
We cover HVAC, plumbing, electrical, cleaning, handyman work, and home modifications, including wheelchair ramp installation, grab bar installation, and stairlift installation. Every trade is handled by the same company under one warranty.
Is same-day service available?
Yes. Call us and we'll work to get a technician out the same day. Our staff is on-call 24 hours a day, every day of the week.
Are your workers background-checked?
Yes. Every worker we send to your property has passed a background check before setting foot in your home or business.
Do jobs come with a warranty?
Yes. Every completed job is backed by a signed warranty under our quality assurance policy. You get documented protection on the work, regardless of which trade performed it.
Do you serve commercial customers?
We do. We handle both residential and commercial work across every trade, with the same per-job pricing and signed warranty for business customers.

YOUR HOME
DESERVES THE BEST

Let's Make It Happen!
  • On-Call 24/7
  • One Company. Every Trade.
  • 1000s of Happy Customers
  • Your Neighbors Since 2003
Prefer to Call? Our staff is available around the clock.

Reach us any time to book a service, ask a question, or get on the same-day schedule.

Call (603) 874-1402
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