The least expensive type ($20 to $50), perches, merely provide a comfortable seat on which kitty can lounge while she watches the activity outside the window. Most do not require drilling holes or attaching screws to your sills; the perches are firmly fastened to the sill by Velcro® or similar cloth and fabric fasteners, plus wood or metal wall braces. Several types are available, including hammock style, plush faux fur and heated. Be sure to buy one that's guaranteed to hold the weight of at least two adult cats and that has a removable, washable cover.
