Add a bit of pizzazz to your home's exterior and brighten your own view from inside the house with this simple, classic window box design. Built to accommodate most common flower and plant containers, you can build several boxes in one day using this simple design – and dress up as many windows as you wish. 

Here we use a simple pair of interlocking beveled cleats to attach the box directly to the house. But you can use rugged metal brackets or adjust the plan to accommodate nearly any hanging apparatus you like best. You can also play around with the front piece and cut a more decorative profile to suit your home's architectural theme.