A screened porch can easily be incorporated into an existing deck or patio. The roof structure does not have to cover the entire area. You may consider covering only a portion of your deck or patio giving you the option to enjoy the sun on a beautiful day and seek shade when the sun is unbearable. Add a grill to either area and you will have a great outdoor entertaining space.
If you live in a neighborhood with a Home Owners Association, it is important that you refer to the bylaws before planning your project. In the above photo, you will notice that some of the supports are fabricated from brick piers and others from pressure treated 6×6 lumber. In this Charter Colony neighborhood in Midlothian, the HOA required that any area covered by a roof be supported by brick piers. The homeowner choose to only use brick piers where they were required.