Normally an interior painting quote may take up to an hour, where as exterior painting quote may only take 30 minutes. Giving your potential paint contractor enough time, that you can adsorb the full packet of information. Knowing your time is very valuable, with busy schedules, most contractors try to work with your scheduled time frame. This will be decided upon initial phone conversation. Setting up a convenient time you both can meet. Depending upon the scope of work, how large the painting project is are all factors determining how much time a paint quote will take. As a seasoned painting contractor like myself, taking any longer than an hour, I'm at a home on the initial visit, we're talking about everything else, besides house painting.