An in-glass dog door for all the right reasons:




Peace of mind.


Our high quality in-glass dog doors are designed for Colorado’s weather and come with a 10-year warranty.

An Expert Installation Team With a Quality Product

For the past ten years, we’ve made countless pets and pet owners much happier by installing the best, high quality, secure, weatherproof in-glass dog doors available.

  • Powerful embedded magnets in frame create an air seal to protect from the weather.

  • Hand built to order in US.

  • Rust resistant, UV treated and weatherized.

Avoid Drafts and Save on Your Energy Bill

Our dog doors comes with magnetic weather flaps that return to their original position once your dog or cat enters or exits.

“[It’s been] below zero the past few days and I do not feel cold air coming from the new doggie door – Awesome!”

Our Process

[We were] so very happy with our door. Installation was quick and efficient. A much better alternative to what we were using for a dog door. Highly recommend.

A Process We Stand By With a 10 Year Warranty

“After all was said and done, I got a quality product and was very pleased with the entire process.”

What Our Customers Have to Say…

“We are SO happy with our new in-glass dog door! Michael was on-time, quick and helpful during installation. John, the owner, was absolutely fabulous in guiding us down the path and helping us choose the best dog door for our home. Our new dog door feels safe, there is no longer a draft, and is WAY better than our dog door insert. I highly recommend Best In Glass Dog Doors for any of your pet door needs!”

Katie C.

“As a home automation nerd, it was very important to me that my dog door for my new puppy be a smart door with a proximity collar. None of the home improvement stores had doors to suit my needs. I was very lucky to be recommended best-in-glass by an employee at one of the big box stores.

Security was one of my concerns as our backyard faces an open space, so they installed super tough glass both in the door and the dog door–no flaps here.

We ordered some extra supplies from the smart dog door company and they missed them. It was very nice to have John as our liason, who worked with the company directly to assure we had everything we ordered before making our final payment.

I highly recommend best-in-glass for a custom dog door solution. They delivered exactly what we needed.”

Hope P.

Our door came in much sooner than expected, the installation was quick and looks incredible. And every representative we worked with was excellent!

Kaleb F.

“These guys are awesome! I highly recommend them. On time appointments. Quality workmanship. Not inexpensive, but worth every penny!”

Jess A.

“I can’t say enough good things about the service that I received. Both John, the owner and Todd the installer were very pleasant throughout the entire experience. I highly recommend them.”

Michael E.

“Install was quick and painless. Our dog absolutely loves it!! He got a case of the zoomies after going in and out a few times he was so excited. Already referred a friend she was so impressed!!”

Robert E.

“A superb service provided by John and Todd who put together a custom electric door in a glass sliding door for our three dogs and two cats. Could not recommend this company and it’s team more. Thank you SO much John and Todd.”

Natalie R.

“Installer was on time, efficient, friendly and professional. I am very happy with our new door!”

Marcie F.

“They are amazing. Everything was done in a timely manner. 10/10 would recommend and will be using again in the future for my other sliding door.”

Cindy E.

“Prompt arrival with attention to detail. Efforts made to make no mess and clean up afterwards was excellent. install appears clean. Just what we were hoping for in this process.”

Brent P.

“Dog door was installed about a month ago and it’s been amazing! We’ve had some really strong winds in our area lately and it’s held strong. I got pretty lucky on timing because they said it could take 6 weeks due to supply chain issues but got installed 3 weeks from the day it was ordered!”

Matt W.

“The doggie door matches perfectly, and is very strong and well made. The installer was very careful and professional. I am extremely pleased.”

Daniel S.

“Best product I have ever purchased for my dogs. These are definitely better than any insert door you can buy.
The installation went smooth and the installer was very professional.
My dogs got used to going in and out relatively quickly.
If you have a dog and sliding glass doors you need a dog door form Best-In-Glass Dog Doors…”

Robert S.

“Mike is awesome. Both the sales and install process were completed by him. Very efficient, very professional, extremely knowledgeable. He even texted the door lock part that I needed, because we had lost track of the locking mechanism after removing it for the door insert. New dog door looks and works great! You might have to wait a month plus from first visit to install, but that’s pretty typical in today’s world, across industries. Happy with our purchase! Thanks Mike, very much.”

Mandy S.

“I was so pleased with the service we got! We had try an insert for our patio door, and when it became a burden we reached out to other places who wanted to do more or charge more and we were not finding what we wanted. John came out and walked us through the product so well and made our decision simple.

The installation was quick and easy, and everyone was so friendly. We have been so pleased with how this has alleviated so many headaches, we wish would have found Best In Glass sooner!!

The quality, cost and company are worth the five stars!”

Brody S.

“These dog doors are much better than anything you’ll find in a big box store! Having the dog door built inside the sliding glass door is a complete game changer.
John came over to our place and helped pick the perfect size door. And Mike did a great job with the installation. Highly recommend!”

Jason J.
“Awesome experience throughout. Friendly, courteous, and responsive staff and installers. Dogs love the door. I even have a 3-legged pit and she gets in and out just fine! Highly recommend!”
Andrew C.

“John and his team were so professional and a pleasure to work with. From a quick, accurate estimate to a timely, seamless installation of a quality product, this was an excellent experience. I highly recommend Best-in-Glass Dog Doors!”

Teri R.
“Could not be happier with the product and service from this business! John and Mike were completely professional, prices were very reasonable, and the whole process only took 3 weeks, with an amazing install right before the storm! I would definitely recommend this business to everyone!”
Shane C.

“My pups new dog door was installed today and I couldn’t be happier. It was more sturdy and more impressive than I expected. Working with John and Mike was great. Both gentlemen are pleasant and professional. Mike let me watch how the door is done and put up with me talking his ear off….lol. Thanks again guys…. from Oliver and me!!”

Susan H.
“I’ve used best in glass twice. Both times they did a fantastic job. Prompt responses and service time with top quality customer service.”
Ellie W.