Any construction site with massive amounts of rubbish to remove; commonly used at larger construction sites, demolition sites and places where no excuses are acceptable. This is one of our bigger dumpsters for rent. You choose the 21 yard dumpster when you are working on some big projects. Projects where there is going to be a lot of junk and debris you need to get rid of. This size is rented by many contractors doing work at homes and businesses. These dumpsters are perfect for getting rid of everything and not having to worry about running out of space in the dumpster for it all.