A solar chimney power plant (also called solar updraft tower) is a solar power generating unit in which a solar air collector and central updraft tower is used to generate a solar induced air flow which drives turbines to generate electricity. This paper presents theoretical and practical experience of making a small and less expensive prototype plant which can be built on rooftops of residential buildings. The plant covering approximately 16.4 sq. meter area has a polythene cover as the collector instead of glass for reducing the cost. The base is tar covered concrete. The tower is made of PVC and approximately 3.05 meters high. Data were taken within November and December 2013. Experimental results show that the average power output varies from 3 to 20 watts and the efficiency was maximum 0.11%. The output and efficiency of the plant was relatively low because of the lacking of solar intensity as the data were taken in winter and because it was a smaller solar chimney plant. But the prototype has a low initial cost and absolutely no operating cost. Thus using of less costly components enables making of a small economical plant.