ABSTRACT: In this study, deformations occurred on the buildings located doing the sloping surface of Kızıltepe located 6km Northwest of Konya, of Plia-Quaternary age silty and clayey sand were investigated., Inclinations of the slopes range between 5°h and 15°}?. The foundations ofttiplex houses and six stories apartments were build partlyon the natural soil and partly on the fiil ground. Six months after the construction, fence wails had been collapstd and some apartments had been leaned and dangerous cracking occurred. Using Modified Bishop and Modified Janbu methods, stability analysis of Kızıltepe slopes have been made on the 20 selected profiles, involvingdeformed buildings and naturel soils and fill ground. Calculated safety factors have shown that there are not in stability problems on the natural slopes. On the improved and- loaded slope profiles, safety factors generally exceed 1,5, excepting two of profiles where safety factors are found as 1,3 and 1,4. No indications of landslips havebeen observed. According to the result of consolidation tests in the 50 kN/m2 pressure stage,, coefficient of compressibility of filled soil to the natural soil ratio is approximately 3,9. This ratio shows that fiil ground undergoesmore settlement than natural soil. Differential settlements up to 13 cm have been determined The cause of deformations in the structures are thought to be due to differential settlements