Surgical instruments and devices for creating surgical working spaces and related methods are disclosed. An example surgical spacemaking device may include surgical spacemaking device an elongated connecting portion and an expandable spacemaking portion disposed distally on the connecting portion. The spacemaking portion may include an expandable lateral base portion. an expandable first vertical lateral portion configured to extend generally orthogonally from the lateral base portion, and an expandable second vertical lateral portion configured to extend generally orthogonally from the lateral base portion.