Dog, cat and pet doors come in many sizes and types considering the weight, height and personal pet needs. The actual material of the dog door may vary depending on the mounting location of the Longmont pet door installation in your home. Contact our pet door experts for a free quote or for more information about choosing the right pet door.


If you're looking to install a dog door, Glass Pet Doors has the background and the expertise to give you the door you need, wherever you need it. We lead the industry with our high quality, cutting edge pet doors to give you the finest pet doors on the market for the best price. Our goal is to bring you superior customer service and products.

Installing a pet door makes it easier to let your cat, dog or pet in and out of the house. Whether you need a pet door installed in a glass door, solid door, window or wall, the installation process requires construction know-how and specialized tools. Our pet door installation consultants will review all your options, evaluate any special needs your pet may have and provide a free cost estimate.

Dog Door Installation 970-714-2840

Pet Door Installation with Glass Pet Doors.

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Sliding glass dog door in Longmont.

Request a Free Dog Door Insert Quote

We have a wide range of quality products, including in glass pet door, that both you and your pet will love. You can choose doors with varying costs, styles, advantages, and warranties. Our dog & pet door experts will give you a free and instant quote for any product to install your pet door with the click of a button.

Quote! Custom Dog Door Testimonials

Get your Instant Pet Door Quote Today!

We have a wide range of quality products that both you and your pet will love. You can choose doors with varying costs, styles, advantages, and warranties. Our dog door experts will give you a free and instant quote for any product to install your pet door with the click of a button.

Testimonials Custom Dog Door Quotes!

Custom Pet Door Installation in Longmont

Sometimes standard Longmont dog door installation doesn't fit your home or pet's needs. The solution may be a custom dimension or location for your pet door. Glass Pet Doors offers free evaluations for people who are uncertain where to place a pet door or what kind of pet door would work best.

Glass dog door from Glass Pet Doors.
PlexidorPlexidor

The best Longmont dog door on the market. They can be easily installed into any door material, and come with a lock and steel security plate for maximum security. With a 10 year warranty and a 90 day money back guarantee, Plexidor dog doors are a high quality and assured to please.

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Endura FlapEndura Flap

If you're looking for something cheaper than Plexidor dog door but still good quality, Endura Flap pet doors are a perfect option. With dual paneled flaps, a magnetic seal, and a secure locking cover, these doors are weather resistant and secure for your peace of mind. Along with a 15 year warranty and 90 day money back guarantee make this Longmont pet door a great option.

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Hale Pet DoorHale Pet Door

Quality, energy efficiency, safety, and security are priorities with Hale Pet Door. All of our door dog doors are rated highest in insulating and sealing, ensuring protection against wind, dust and insects. All Hale Pet Door branded products are manufactured in the United States with the greatest attention to detail.

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What Our Customers Say

  • Dana Troy
    Got a pet door for my vinyl sliding glass door, it's a game-changer. Pricier than an insert, but way more convenient and totally worth it. Took my dog a couple weeks to get fully comfortable with it (she's a scaredy cat and hadn't used a dog door before), but now she's freely going in and out on her own without letting the hot/cold air or bugs into the house. I opted for the Endura flap, partly because of the lifetime warrantee, and I can see why, it's clearly built to last. Joe did the install, he was friendly, professional, and super helpful. Overall awesome experience, if I'm ever in the market for another pet door I'm definitely going with them again!
  • Kristy Lee
    We had a great experience! The communication was great and the installation was super fast! We are very happy with our new pet door and highly recommend to anyone who needs glass services!
  • Morgen Vanesselstine
    Joe is seriously the best! He was so incredibly friendly. He covered everything he was doing with each step. He also literally left everything better than he found it. Usually with contractors in the past I have to spend some time cleaning up after they leave. Joe cleaned up everything. Also, was really great with the doggos. Thanks again for everything, Joe!
  • Laura Dunnigan
    Excellent. It’s such a relief not to clean up after my 3 dogs. Professional and perfect. I highly recommend this one!!!
  • Jamie Hedlun
    I would like to give this company five out of five stars because their communication is excellent, they worked with our schedule, the price was fair, and the quality is impeccable. We had no issues from start to finish, and we would definitely work with them again!
  • Joel Lewis
    I just received a pet door at my house. I am gone long hours and needed my dog to have a way to go outside. This door solved all the problems, plus I am able to open my sliding glass door all the way. The door took about 5-6 week to specially make and my installer Joe was in contact with me the whole time. When he installed the door he gave me the very best in service and the sliding glass door is amazing. The doors are not cheap but well worth the money and comes with 10 year warranty on the glass and lifetime on the dog door. I would recommend Best in glass pet doors to anyone!
  • Alexandra Hawk
    Absolutely awesome people to work with. Trevor and Brad are both really on top of it. They were punctual, easy to work with, and professional. I was actually really amazed at how fast the installation was. I would definitely recommend them to anyone.