Decks, often used interchangeably, are among a wide variety of permanent outdoor structures that can be built on your property. Once you’ve added a deck to your home, you may find it’s too hot and sunny to enjoy in midsummer. You can add a corner pergola to your deck to create a room outside, with crossbeams for shade and a trellis to add plants to one or more sides, to keep it even cooler. A corner pergola in a deck can be made by a home owner as an outdoor home improvement project. Build it from the same wood as the deck so it blends in naturally.