Logo of Window Authority

Window Authority

  • 15 Londonderry Rd # 10, Londonderry, NH 03038
  • 24/7 Emergency Repairs
  • Financing Available
  • Warranties Offered
  • Green Roof
  • Flat Roof
Hours
Mon7:30 AM - 9:00 PM
Tue7:30 AM - 9:00 PM
Wed7:30 AM - 9:00 PM
Thu7:30 AM - 9:00 PM
Fri7:30 AM - 9:00 PM
Sat7:30 AM - 9:00 PM
Sun7:30 AM - 9:00 PM

About the Business

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What people say about “Window Authority”?

There are not enough reviews yet to form a clear opinion about Window Authority

Recommended Reviews

Overall Company Rating
Excellent 4.8
Out of 18 reviews
5 stars
4 stars
3 stars
2 stars
1 stars
Show first:
Benjamin Mahoney
Jul 19, 2025

I recently underwent window replacement and the owner Tim was very relatable, fun and respectful, the windows also turned out better than I could have ever imagined. These people know how to do windows right!!!

Dante Monty
Jun 3, 2025

Great service, would 10/10 recommend to anybody. Excellent staff they are all nice and I had the please to meet Tim, he’s the best!

Lisa Gazzara
May 16, 2025

We had 10 windows, picture window and sliding glass door replaced. The price was a very fair price out of four quotes. The product exceeded our expectations, and I love the new picture window and sliding door. Tim and Don were great to work with, Bobby and Anthony have great workmanship skills. Love my new windows!

Sophia Baston
May 14, 2025

I would highly recommend Window Authority! From pricing to timeliness to efficiency, their team was on top of it. I love my new windows!

MacNeil Jane
Apr 24, 2025

I recently used Window Authority to replace my very old windows. I am very careful with money & looked at many options & met with several qualified companies. I chose Window Authority as the best, economical option. I am very happy & noticed the difference during this windy, cold winter. The crew was amazing & cleaned up & took away all of the old stuff. I highly recommend Window Authority!

Aila Minette
Feb 16, 2025

I had an amazing experience! From start to finish, everything was flawless. The service was exceptional, and the staff was incredibly friendly and helpful. The product exceeded my expectations in every way. High-quality, efficient, and exactly as described. I would definitely recommend this to everyone! I’ll certainly be coming back for more. Highly satisfied with my purchase!

Jr Jr
Jan 17, 2025

The quote was extremely competitive, i.e. a no brainer. Workmen arrived at the specified time with 9 double hung new windows. The old dual pane windows of >25 years, had air leaks and broken hardware. Exterior wood was clad in aluminium as quoted. Installation took the predicted two days. Some damaged interior wooden trim pieces were replaced. As agreed, I would paint the interior trim. All old window/debris was hauled away by the joiners. Nothing went wrong! Very happy.

Mason Siciliano
Jan 14, 2025

Excellent experience with these guys… from sales to installation the process went smoothly and the end product looks great! Can’t recommend them enough!

Evelyn Bocchino
Dec 4, 2024

Window Authority installed 9 large, custom windows. It was the best experience I ever had with a contractor. From estimate to final measure to production to installation everything was on time. The team was courteous, friendly, skilled and professional. The windows are beautiful. I highly recommend!

Garrett Hunter
Nov 30, 2024

Their team was so efficient and did such a good job. I love my new windows and this company did It was so little hassle. I would recommend them to anyone who needs windows.

Shaun Hastings
Nov 23, 2024

My wife & I worked with Anthony, Bobby & Chris recently for some new windows at our home. We had an excellent experience with them from beginning to end. They were knowledgeable, had competitive pricing and their installation team was extremely professional. Made quick work of the installation and left the house as clean as before they came. Couldn't be happier with how it went. Will absolutely be using them for our next window projects!

Roslyn Ayers
Nov 22, 2024

I would not recommend Window Authority or use this company's services again. This company and their employees were incredibly unprofessional.
I ordered 6 new basement windows in August. The windows were delayed a month, and I did not receive any communication about the delay until I called to ask for an update.
While they were installing the windows, the installation team was blasting loud political radio, which was clearly audible upstairs.
The subcontractor who finished the interior trim spent several minutes over the phone screaming obscenities at the previous installer for not doing the job correctly, and then he started complaining about me. He was also vaping in the basement.
The interior and exterior caulk was smeared all over, globbed on carelessly, and already cracking in multiple places a week later. There was also some old tape securing one of the old windows, and instead of just pulling it off, the installers decided to just leave it and embed it in the caulk/trim.
For the exterior trim, instead of covering the window frame like we'd discussed, the installer glued trim on the foundation, around the window cutouts. He mostly fixed the issue by removing the weird trim but was unable to remove most of the excess glue. He also did not complete the caulking on all the windows.

Sandy B
Sep 18, 2024

Tim gave my husband and I a very fair quote to replace the storm door and the kitchen/side door of our house. I appreciate Tim working with us to get the custom kitchen door we want and to have the exact same Andersen storm door to match the one that is in the front of the house. Bobby and Anthony installed our doors. Anthony has quite a sense of humor! The pictures attached are the before and after pictures: left is the original ancient door and right is the new one with the decorative glass.

Lyn Drew
Aug 20, 2024

Window Authority has been a wonderful contractor to work with. From start to finish. Pricing was fantastic. The job started in time and finished very quickly.
Tim came out and inspected & quoted on our window & slider replacement job.
He was professional & courteous.
No pressure. Which was nice!
Bobby & Anthony were the gentlemen who installed our windows & new slider. They were efficient, friendly and knowledgeable.
Griffin, coordinated this job on behalf of Window Authority and was an excellent communicator throughout our project.
I would highly recommend Window Authority!
Thanks so much! Lyn & Bob

Dena Donato (Dena)
Aug 1, 2024

Great experience! They showed up on time and did a fantastic job removing our old windows and installing replacements. I would use Window Authority again!

Terry Clayton
Jul 31, 2024

I do quite a bit of home repair and remodel. I needed to replace a custom door which required framing work. Window Authority executed excellent work, very efficient, at a fair price. I would recommend them without any reservations. Thank you!

Lockes Hill
May 23, 2024

Our roof was installed promptly and professionally. The crew did a great job of keeping the yard free of roof debris.

Keith Mercier
May 8, 2024

Tim at Window Authority is excellent to work with! He is honest, professional, easily navigates difficulties and communicates well. His installer Kevin is also a nice hardworking guy and a pleasure to work with. I highly recommend this Company!

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  • 15 Londonderry Rd # 10, Londonderry, NH 03038
  • 24/7 Emergency Repairs
  • Financing Available
  • Warranties Offered
  • Green Roof
  • Flat Roof
Hours
Mon7:30 AM - 9:00 PM
Tue7:30 AM - 9:00 PM
Wed7:30 AM - 9:00 PM
Thu7:30 AM - 9:00 PM
Fri7:30 AM - 9:00 PM
Sat7:30 AM - 9:00 PM
Sun7:30 AM - 9:00 PM

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