This paper presents a vision-based monitoring system for developing low-cost and contactless Parking Management Services (PMS). Additionally, this paper describes a flexible and adaptive parking space monitoring system. More precisely, this system can be exploited for detecting parking space occupancies. Experimental results have been conducted by using a webcam that is connected to a conventional micro-computer in order to detect available car parking slots. The system can be installed either at the top of a street pole or a building and can be oriented in direction of a targeted car parking.