A modular window well arrangement includes one or more window well members. The window well members can be interconnected in a vertically stacked arrangement to provide the required overall height. Snap-connectors interconnect the vertically adjacent window well members, and a plurality of steps provide for escape. The window well members may have different sizes, and extension walls may be utilized to increase the size of the window well members to provide for a wide variety of configurations. The window well members may be made of a relatively lightweight structural foam material.