Low-profile garden hose storage apparatus comprises a housing adapted for mounting onto an exterior wall of a building to store a garden hose having first and second ends and an outer diameter ‘d’. A reel, rotatable in the housing, has a central hub and a pair of plates spaced apart at a distance of 1, 2 or 3d. In the preferred embodiment the plates are spaced apart at a distance slightly greater than d such that a single layer of hose may be wound thereon in a ‘pancake’ configuration. A water inlet is coupled to the hub through a swivel fitting, enabling the reel to rotate as water is delivered. The first end of the garden hose is coupled to the hub of the reel between the plates, with the second end of the garden hose extending through an opening in the housing. The apparatus further includes a mechanism for automatically winding the garden hose onto the reel between the plates, thereby retracting the hose into the housing through the opening thereof. The outer surface of the housing may be configured to be less conspicuous. For example, the outer surface of the housing may be configured to appear as house siding, brick or cinder block.