When people search for the best pet doors in Australia, they usually want more than a basic flap. They want a pet door that suits their pet, works with their home, looks good once installed, and gives them confidence around security, safety, and everyday use.
The best pet door is not always the cheapest option or the product with the most features. The best choice suits your pet’s size, your door or window type, your locking needs, and the finish you want in your home.
A good pet door does more than let your cat or dog move in and out. It needs to fit correctly, lock securely, handle daily use, resist weather, and suit the surface where you install it. The right pet door for a small indoor cat in a laundry window will differ from the best option for a large dog using a timber door, security screen, or sliding glass panel.
If you are comparing installation options, it helps to start with our pet door installation types so you can see what works best for glass, timber doors and security screens.
How to choose the best pet door in Australia
Start with the right opening size, not just the brand name. Many pet owners guess based on breed or measure from the wrong point. This can lead to a pet door that feels too tight, sits too high, or makes your pet crouch awkwardly. Check out our guide on how to measure your pet correctly.
A properly fitted pet door lets your cat or dog move through naturally. Your pet should not need to squeeze, duck too low, or clip the sides. This matters even more for older pets, larger breeds, broad-chested dogs, and timid cats.
If you have both cats and dogs, sizing can become a little more complex. Our guide to choosing a pet door for cats and dogs explains how to choose an option that works for more than one pet.
You also need to consider where the pet door will go. Timber doors usually offer the simplest installation. Screen and security doors need a pet door that suits mesh or grille sections. Glass requires a more specialised process.
In most cases, installers cannot cut existing toughened glass on site. Instead, they replace the panel with a new Grade A Toughened Safety Glass panel manufactured with the pet door opening already in place. You can read more about this process in our guide to in-glass pet door installation.
This detail matters. A pet door that looks affordable online can become the wrong choice if it does not suit your existing door, window, or glass panel. The best pet doors match both your pet and your home.
Best pet door for glass: Premium Underbelly Pet Door from Pet Doors Australia
For customers who want a premium pet door installed into glass, we recommend the Premium Underbelly pet door from Pet Doors Australia.
This top-of-the-range pet door gives glass installations a clean, high-quality finish. Pet Doors Australia makes it here in Australia from super strong and durable Perspex, so it suits homeowners who want strength, style, and long-term performance.
The Premium Underbelly pet door includes barrel bolt locks, which give you a simple and secure way to control access. For double-glazed installations, optional spacers help create a neat finish within the glass unit. You can also add a secure lock cover for extra peace of mind.
This pet door looks especially clean in glass doors and windows because of its sleek, low-profile design. If you plan to invest in new glass, double glazing, or a highly visible area of the home, choose a pet door that complements the final result.
For a high-end pet door installation into glass, the Premium Underbelly pet door offers one of the best finishes available. You can also view our Pet Doors Australia installation options if you want a professionally installed solution using trusted pet door products.
Pet doors for timber doors
Timber doors usually provide the easiest surface for pet door installation. They suit many common cat flaps and dog doors, and they allow flexibility with height and placement. For many homes, a timber door gives you the most direct and practical installation option.
For timber doors, we recommend choosing from our pet doors for timber doors range. These options suit professional installation and everyday use. Whether you need a small cat flap, a medium dog door, or a larger option for a bigger breed, the right product depends on your pet’s size, confidence, and daily routine.
Solid timber doors and hollow-core doors need different installation methods. Door thickness can also affect the final fit. If you are unsure whether your door will work, our article on installing a pet door in a hollow-core door explains what to consider.
A lightweight flap may not suit a large, active dog, while a heavy flap may discourage a small or timid cat. The best timber door pet door should feel easy for your pet to use and still give your door a tidy, secure finish.
Pet doors for security screen doors
Security screen doors suit many Australian homes because they allow airflow while helping to keep insects out. They also provide a convenient place to install a pet door.
However, screen door installations need the right product and a careful fitting process. The pet door must suit the frame, mesh, and grille style. The installer also needs to reinforce the cut section properly so the finished result stays stable, secure, and neat.
For screen and security doors, we recommend using our pet doors for screens range. These products work with screen-style doors and help keep the door functional and tidy.
A screen door pet flap can make everyday life easier because your pet can come and go without you leaving the main door open. Choose the right flap and have it fitted correctly for the best result.
If you want to understand screen door options in more detail, read our guide to dog doors in security screens. We also explain whether you can put a pet door in a screen door and what to know before cutting into a screen.
Pet doors for sliding glass doors
Sliding glass doors make a popular location for pet doors, but they require careful product selection. When choosing a pet door for a sliding door, always consider the pet door profile.
A slimline pet door often works best for sliding glass doors because it reduces the chance of interference with the sliding panel. It also creates a cleaner finish. A bulky pet door may affect how the door operates or look too heavy in the glass.
For sliding glass doors, installers usually replace the existing glass panel with a new Grade A Toughened Safety Glass panel. The manufacturer creates the new panel with the correct opening, which allows the pet door to fit safely and neatly.
If you want the pet door to look like it belongs in the door, product profile matters. This is another reason we recommend the Premium Underbelly pet door for glass installations. Its clean design suits glass beautifully and gives a more premium finish than many standard pet doors.
You can learn more about glass options on our pet doors in glass page.
Pet doors for glass doors and windows
Glass pet door installations often cause confusion. If you have a sliding glass door, fixed glass panel, laundry window, or other glass area, you usually need a replacement glass panel rather than a hole cut into the existing glass.
This applies especially to toughened glass and double glazing. You cannot cut toughened glass after manufacture. Instead, a glazier must measure the panel, order new glass with the correct opening, and then install the pet door into the replacement panel.
That means glass pet doors involve more than buying a flap off the shelf. You need the correct glass type, accurate measurements, the right pet door size, and a product that looks good once installed.
For a premium glass finish, we recommend the Premium Underbelly pet door from Pet Doors Australia. It offers strength, durability, a clean appearance, and a high-quality result in glass.
If you are comparing costs, our guide to glass pet door installation cost in Australia explains why glass installations usually cost more than timber or screen installations. You can also read our article on how much it costs to install a pet door in glass.
Pet doors for double-glazed panels
Double-glazed units need specialist handling. These sealed glass units require a new panel manufactured with the pet door opening already included. You cannot treat double glazing like standard single-pane glass.
For double-glazed installations, the Premium Underbelly pet door works well because optional spacers help create a clean finish within the double-glazed unit. This gives the installation a polished look and helps the pet door sit neatly in the panel.
If energy efficiency, noise reduction, and appearance matter in your home, do not cut corners with double glazing. A professionally manufactured replacement unit helps protect the finish and function of the glass.
You can view our glass pet door installation service for more information about glass and double-glazed options.
What makes one pet door better than another?
No single pet door suits every home. The best pet doors in Australia usually share a few practical strengths. They fit the pet correctly, use durable materials, lock securely, suit the installation surface, and look good once installed.
A good locking system matters if you want control overnight, while you are away, or during certain times of the day. Some pet doors offer simple manual locking. Others offer more flexible locking options. The Premium Underbelly pet door includes barrel bolt locks and also allows you to add a secure lock cover for extra peace of mind.
Durability also matters. Active pets may use their pet door many times a day. Strong materials, quality hardware, and a stable frame help the door perform better over time.
Weather resistance also deserves attention. In exposed areas, a poorly fitted pet door can let in draughts, rain, dust, or noise. The right product and a professional installation help create a better seal and a better everyday result.
If you still have questions about sizing, security or installation, our pet door FAQs cover many common concerns.
How to choose the right pet door size
Many customers ask, “What size pet door do I need?”
The answer depends on more than weight. Two dogs can weigh the same but have very different body shapes. Broad-chested breeds, long-legged dogs, older pets, and fluffy cats may all need more clearance than expected.
Measure the widest part of your pet and the height from the floor to the top of their shoulders. Then allow enough clearance for comfortable movement. If your pet is still growing, consider their expected adult size. If several pets will use the door, choose a size that suits the largest regular user while still feeling comfortable for the smaller pets.
Mounting height also matters. A pet door can have the right flap size but still feel awkward if it sits too high or too low.
If you have both a cat and a dog, you may also find our article Can a cat use a dog door safely? helpful.
Why professional installation matters
A premium pet door still needs quality installation. Poor installation can leave the frame crooked, make the flap drag, stop the locks from lining up, or create a rough finish. In glass and double glazing, poor choices can also affect safety and compliance.
Professional installation removes much of that risk. It also saves you from trying to work out whether a panel can be cut, whether a security screen needs reinforcement, or whether your chosen pet door suits your pet and home.
Pet Doors On Time specialises in pet door installation. We do not just look at the product. We look at your pet, your home, your door or window type, and the safest way to achieve a clean result.
You can explore our full pet door installation types to compare glass, timber and security screen options.
Why the cheapest pet door is not always the best choice
Budget matters, but the cheapest pet door rarely offers the best value. A low-cost flap may wear quickly, seal poorly, look bulky, or fail to suit the installation location. Over time, this can cost more than choosing the right option from the start.
This matters even more for glass and double glazing. These installations involve custom-manufactured replacement glass, safety requirements, and professional fitting. A higher-quality pet door can make a noticeable difference to the final appearance.
If you already plan to invest in a new glass panel, choose a pet door that matches the quality of the installation. For customers who want a premium finish, the Premium Underbelly pet door makes a strong upgrade.
For customers using Bunnings Special Orders, we also offer Bunnings pet door installation for glass, timber and security door installations.
Choosing the right pet door for your home
If your home has a standard timber back door and a small to medium pet, you will usually have several straightforward options. Choose from our pet doors for timber doors and select a size that lets your pet move comfortably.
If you rely on a screen or security door for airflow, choose a pet door designed for that type of installation. Our pet doors for screens range includes options suitable for many screen-style doors.
If your best access point is glass, a sliding glass door, or a double-glazed panel, plan for a more specialised process. In most cases, your installer will replace the glass with a new panel manufactured to suit the pet door. Start with our pet doors in glass page if you want a clean in-glass result.
For a premium glass result, we recommend the Premium Underbelly pet door from Pet Doors Australia. It is Australian made, strong, durable, clean-looking, and practical. It includes barrel bolt locks, optional spacers for double glazing, and the option of a secure lock cover.
The right pet door should make everyday life easier. Your pet should move through it confidently. You should be able to lock it when needed. The finished installation should look like it belongs in your home.
That is the difference between a pet door that solves a problem and one that creates a new one. Start with your pet’s size, your installation surface, and the finish you want to achieve. The best result usually comes from choosing the right product from the start.
