Glass Dog Doors and In Glass Pet Door Installation

Read our complete guide to installing a dog door in glass

Portal Pros installs glass dog doors nationwide in sliding glass patio doors, French doors, swinging glass doors, and fixed glass panels. If you want a dog door for a sliding glass door without a bulky panel insert sitting in your track, or a pet door for a glass door that looks factory built instead of added on, an in glass pet door is the cleanest permanent solution on the market.

Every installation uses custom fabricated tempered glass built to your exact dimensions. We work with glass from 1/4 inch to 1 1/2 inch thick, single pane and dual pane insulated glass, and Low E coatings, with flap sizes for pets from XS through XXL, including large and giant breeds. Your door keeps its full function, your home keeps its energy efficiency, and your pet gets secure access day and night.

Three Ways We Install a Dog Door in Glass

Most companies sell you a panel insert and call it a day. Portal Pros offers three professional installation methods, so your glass dog door is matched to your exact door type, budget, and the look you want.

1. Through the Glass

We replace your existing glass with a new custom tempered unit that has the pet door built directly into the glass. Your door frame, hardware, locks, and rollers stay exactly as they are. From inside and out, the dog door looks like it came from the factory that way. This is the most popular method for sliding glass doors and fixed panels, and it works with single pane, dual pane, and Low E glass.

2. Notched Glass Replacement

Instead of framing the pet door in the middle of the glass, we fabricate a replacement panel with a notch cut at the bottom corner or bottom center where the pet door frame sits. You keep the maximum amount of clear glass and unobstructed view, and the finished result is one of the most seamless looks available for a doggy door in a sliding glass door.

3. Full Door Slab Replacement

For hinged patio doors and some sliding applications, we replace the entire door with a new slab that arrives with the pet door already installed. Full door replacements are available with clear glass, partitioned glass, or built in mini blinds. This is the right route when the existing door is worn out anyway, or when you want blinds inside the glass.

What Is an In Glass Pet Door?

An in glass pet door is a dog door or cat door installed directly into a custom replacement glass panel rather than mounted in a wall, cut into a door slab, or wedged into a track as a temporary insert. Portal Pros never cuts your existing glass. We measure your panel, fabricate a new tempered unit with the pet door built in, and swap it into your existing frame.

The result is a built in dog door that preserves natural light, keeps your door sliding and locking normally, and looks intentional from both sides. It is the preferred choice for homeowners comparing a sliding glass dog door insert against a permanent glass conversion, and for anyone who wants pet access through a patio door, French door, or fixed glass panel without changing the design of the space.

Dog Doors for Sliding Glass Doors

The sliding glass patio door is the single most popular location in America for a pet door, and it is our specialty. A Portal Pros sliding glass dog door installation uses either the through the glass method or a notched glass replacement, so there is no aluminum panel eating into your walkway, no gap at the top of the slider, and no clamp lock workaround. Your patio door slides, locks, and seals exactly like it did before, with the pet door built into the glass itself.

Compared to a patio panel insert, a true in glass installation seals tighter, insulates better, keeps your full door opening usable, and does not interfere with secondary locks or alarm sensors. It is the difference between a temporary accessory and a permanent upgrade to your home.

Dog Doors for French Doors

Yes, a dog door can go in a French door. For true divided lite French doors, we replace one or more individual glass panes with a custom fabricated unit sized to your pet. For French doors with a single large glass panel and simulated grids, we use the through the glass or notched method. Configurations vary, so the fastest way to get an answer is to text us a photo of your door and we will tell you exactly how we would approach it.

Single Pane, Dual Pane, and Low E Glass

Every replacement panel is fabricated to match the construction of your original glass. Dual pane insulated glass units keep their thermal performance, and Low E coatings are fully supported, so your energy efficient patio door stays energy efficient after the pet door goes in. In hot and cold climates alike, this is where an in glass pet door clearly beats a single pane aluminum insert, which can quietly drive up utility bills year after year.

Our In Glass Dog Door Lineup

MaxSeal PRO In Glass Dog Door

The MaxSeal PRO is our premium glass dog door, built for homeowners who want the best sealing, insulation, and durability available. Customer reviews consistently call out the tight seal, draft free performance, and professional fit and finish after installation.

MaxSeal In Glass Dog Door

The MaxSeal delivers the same clean, professionally integrated in glass installation in multiple finish options, giving you flexibility on appearance, pet size, and budget without giving up permanent glass mounted performance.

SB Standard In Glass Pet Door

The SB Standard is our entry level in glass option, a practical way to get a permanent, custom fabricated glass pet door at a lower starting price. It follows the same custom tempered glass installation model as our premium lines.

Portal Pros installs every major pet door brand on the market. If you already have a specific product in mind, call us at 855-DOG-DOOR and we will confirm compatibility with your glass.

Sized for Every Pet, XS Through XXL

From cats and small dogs to Great Danes, Rottweilers, and other giant breeds, our in glass lineup covers flap sizes from XS through XXL. Correct sizing matters for comfort, flap longevity, and weather sealing, so we confirm your pet's shoulder height and width during quoting and help you choose the right step over height for the finished installation.

Security Built In

Every glass dog door we install includes a locking security panel, and our higher end options use industrial grade security panels for real peace of mind. Electronic pet doors with collar sensor or microchip activated selective entry are also available, so only your pet gets through and nothing else does.

Professional Glass Pet Door Installation, Nationwide

In glass installation is not a DIY project. It involves custom tempered glass fabrication, proper glazing, and precise sealing against air and water infiltration. Portal Pros operates a nationwide network of licensed, bonded, and insured installers, and most installations are completed in a single visit of two to eight hours once your custom glass arrives.

Get Started on Your Glass Dog Door

The fastest path to a quote is a photo. Text pictures of your door to 719-301-7678 and we will identify your door type, recommend the right installation method, and get your custom glass quoted. You can also schedule a live video consultation and we will assess your door with you in real time. Free shipping on every order, always, and a portion of every sale is donated to no kill animal shelters across the United States.