Abstract: A semipermanent enclosure for a wheelbarrow is used to allow building contractors, installers and the like, some of which already have wheelbarrows, to affix the enclosure to the wheelbarrow in a convenient manner for use as a semi-secure storage box which may be left on site and accessed relatively easily. The enclosure has a plastic body having a dome portion surrounded by a wheelbarrow edge engaging periphery portion. The dome portion rises upwardly from the periphery portion so as to increase storage space there underneath, especially for tools, equipment and the like piled above the edge of the wheelbarrow. The periphery may comprise a forward engagement which locks under the front edge of the wheelbarrow rim and which are secured at a rear thereof using fasteners penetrating the periphery and the adjacent rim of the wheelbarrow. The periphery may be sized and shaped to suit most commercial wheelbarrow rim sizings.