The average cost of a body wave perm itself can range from $40 to $200, depending on factors like hair length and salon location. However, to achieve a full head of body waves with a natural look, you'll likely need extensions added for the areas around your part and hairline. This is where body wave hair with closure, with its ability to provide a natural blend and a full head of body waves, comes in, making it a worthwhile investment.

A closure, a small hairpiece that mimics your scalp and hairline, is a key component of a body wave perm with closure. Typically made with lace mesh and real human hair, it is attached to your head, allowing for a more natural blend with your hair, especially when styled in a ponytail or updo.

The cost of body wave hair with closure adds another layer to the price. Hair extensions themself can vary greatly depending on quality, length, and origin (e.g., Brazilian, Remy human hair). Expect the expense between $100 to $500 for high-quality body wave hair extensions.

So, for a body wave perm with closure, the total cost could range from  $140 to $700, depending on the factors mentioned above. Be sure to consult with a hairstylist based on your unique requirements and preferred hair quality to receive a more precise price.