How to Install a Pet Door in an Exterior Door: Step-by-step guide for installing a pet doorSarah ThompsonJan 23, 2026Table of ContentsGathering Your MaterialsMeasuring and Marking the DoorCutting the DoorInstalling the Pet Door FrameFinishing Touches and TestingConclusionFree Smart Home PlannerAI-Powered smart home design software 2025Home Design for FreeInstalling a pet door in your exterior door can enhance your pet's freedom while giving you peace of mind. This guide will take you through the process step by step, ensuring that your furry friend can come and go as they please. Whether you have a small dog or a large cat, a pet door can be a great addition to your home. Let’s dive into the installation process!Gathering Your MaterialsBefore starting, make sure you have all the necessary materials for the installation. You will need a pet door kit, a measuring tape, a pencil, a saw, and a screwdriver. It’s important to choose a pet door that suits the size of your pet. Measure your pet to ensure the door will be the right height and width.Measuring and Marking the DoorOnce you have your materials, the next step is to measure your exterior door. Use the measuring tape to find the ideal height for your pet door, typically around your pet's shoulder height. Mark the outline of the pet door on the door with a pencil. This is crucial to ensure a precise cut. Remember, measure twice, cut once!Cutting the DoorNow it’s time to cut the door. Using a saw, carefully cut along the marked lines. Take your time to ensure that the cut is as straight as possible. Once the hole is cut, you may need to sand down any rough edges to make sure there aren’t any sharp parts that could harm your pet.Installing the Pet Door FrameNext, position the pet door frame into the hole you just created. Follow the manufacturer’s instructions for installation, which typically involves securing the frame with screws. Ensure it is level and securely fastened. This part is essential to prevent any drafts or water from seeping through.Finishing Touches and TestingAfter securing the frame, attach the flap according to the instructions. Make sure it opens and closes smoothly. Test it out by encouraging your pet to use it. If everything works well, you’ve successfully installed a pet door!ConclusionInstalling a pet door is a rewarding DIY project that can improve your pet's quality of life. Not only does it give them the freedom to explore the outdoors, but it also saves you time from having to open the door repeatedly. So, what’s your biggest challenge in installing a pet door? Share your ideas below!welcome to CoohomHome Design for FreePlease check with customer service before testing new feature.