What looks like the toughest part of this project is actually the easiest—the graceful, solid-looking columns. They’re not wood at all but a hollow-core composite material with amazing structural strength and durability. We’ve designed the project so you simply slip these columns over treated 4x4 posts embedded in concrete. When screwed to the wooden posts, these columns provide a stable, solid base for the overhead lattice framework. These paintable precast columns are available by special order at home centers. They come in a wide variety of diameters and heights and architectural styles. Expect to pay about $200 or more for each column. Pressure-treated dimensional 2x8s and 2x10s make up the majority of the upper framework, and the decorative end pieces are cut with a jigsaw from our pattern. The whole project can be built in a couple of weekends, with another weekend for staining and painting. You’ll spend about $2,400, including the cost of the columns. We built our pergola over an existing stone patio; that saved a lot of patio work. If you’re planning to install a patio as part of your overall project, you’ll need to allow extra time. | 
