Abstract: The fast development of mobile communication systems all over the world has caused the appearance of many hundreds of mobile telephone base stations in every municipality. Mobile base station set up has produced concerns about health and in some cases has resulted in litigation in court. Hence, radiological hazard assessments due to electromagnetic radiation emitted from 50 mobile base stations GSM900-GSM1800 were carried out. The measurement was performed at different distances and directions from 50 mobile base stations using Aaronia Hyper LOG 4040 X instrument. The mean Power density (0.00595W/m2) and Power Ratio (-52 dBm) were determined and compared with International Commission on Non-Ionizing Radiation Protection (ICNIRP), World Health Organization allowable limits and different countries. On the other hand, the investigation highlights the importance of radiation monitoring of mobile phone antenna on a residential building.