Abstract: A portable security housing is formed from a framework defining an interior space for enclosing items to be secured, such as vending machines. The framework has a rear wall, opposite side walls, an upper wall, and a front access opening. Opaque panels are secured over at least the side and upper walls to cover the housing, with the rear wall placed against a building wall or the like. A roll-up, sectional door is rotatably mounted at the upper end of the front access opening for movement between a rolled up, storage position above the front opening and an unrolled, downwardly extended deployed position covering and closing the front opening. The housing has floor mounting pads at its base for releasably mounting the housing on a floor or ground surface.