Start by setting your new window well and secure it to the wall per the manufacturer's instructions. This will normally require drilling into the basement wall to install concrete anchors. Be sure to use a code compliant window
well. If the well will be deeper than 44" from vertical grade, a code compliant ladder will need to be installed. Ladders or rungs shall have an inside width of at least 12 inches, shall project at least 3 inches from the wall and shall be spaced not more the 18 inches apart. Many of the preformed window wells are made with integral code compliant steps. After the window well is in place, dig down to the footing drain that runs around the perimeter of the house. More than likely this is a simple french drain.