Professional service is important when buying new windows and doors in Mississauga. We provide a one-stop-shop from the initial estimate to the product manufacturer, expert installation, and customer service including after-installation support. For custom window and door installation in Mississauga, we are proud to employ licensed custom installers in the industry. At Custom Window Designs, we have long term experience and on-site training for all types of window and door installations. We are a leader in our industry, take a look at what you can expect with our services.