Unreinforced Masonry (URM) buildings constructed earlier than 1930 are the largestrnstoke of buildings made in those years in many parts of the world. Such buildings arernalso common in older parts of Addis Ababa, which includes; many private residential,rnbuildings, governmental offices, schools, hospitals, spiritual places, and market centers;rnthese buildings were constructed in the absence of mandatory earthquake designrnrequirements and unquestionably recognized as the type of construction most vulnerablernto earthquakes.rnAccording to previous code EBCS 8 1995 seismic zoning, Addis Ababa was categorizedrnunder Peak Ground Acceleration of 0.05g. However, the revised Ethiopian Standardrncodes ES EN 1998:2015 specified a value 0.1g. This increased estimate indicates thatrnAddis Ababa is no longer in low seismic zone and there is related posed seismic hazard.rnThe main goal of this study is to develop a simplified performance assessment procedurernto URM buildings so that practitioners can be able to estimate quicker the status ofrnsimilar buildings and ultimately to propose valuable intervention works to avert posedrnseismic hazard.rnIn particular simplified hand calculation approach which includes defining materialrnproperties from non destructive tests and visual data have been used to analyze samplernbuilding. The commercially available, finite element software tool, SAP2000, is used. Sornthat to model a case-study-building. Results found both from the hand calculation andrn3D modeling are compared which can be seen in respective parts of this thesis; andrnfinally the performance level status of the sample building is evaluated.