Diy Pergola Easy . Here’s how to do it yourself. If you are using anchors on the poles use 10′ 6×6 poles. Top 20 Pergola Designs, Plus their Costs from www.24hplans.com Measure a 10’x10′ area making sure it is squared by measuring diagonally in both directions. Here are some of the top pergola designs you can diy today. Round treated wood plugs to fit the inside of your columns.