Abstract: A tool layout caddy has an upstanding vertical post with a handle at one end and a base member at the other end. A receptacle for the placement and storage of tools, chalk, and other necessary items for the layout operation is secured to the vertical post. A sheath member is provided for the placement and storage of a measuring square. The base member of the caddy houses the chalk line, a chalk line reservoir for replenishing the chalk line, and a chalk line retracting mechanism. A stop marker ensures that the end section of the chalk line always remains external to the base member and, during use, a hook at the end of the chalk line may be secured to the receptacle for ease of access during layout operations.