Begin by digging out the grass inside the marked area, and placing it to the side for reuse later. Dig around the edges evenly and work your way around the marked area. Once you’ve dug down about 18”, test fit your DogeDen. If done correctly, it will be level with the marked “Ground Level Line” indicated on the side of the doghouse.
Once the front and sides are filled in, you can begin back filling the dirt around the back and on top of the doghouse. Once the soil is packed in adequately and completely all the way around the DogeDen go back and add the sod (grass) pieces reserved to the area along the backside of the doghouse.