The scope of the presented paper can be considered as a case study to be set as an example for the application and comparison of tworecent Turkish Earthquake Codes 2007 and 2018 in terms of soil investigation (site characterization) and soil classification performedon a particular test field.The investigation site subject to the particular study is located in Altıntepe neighborhood, in Maltepe, Istanbul. The soil classificationand evaluation of swelling and liquefaction problems were performed at the site based on the TBEC-2018 which is valid since01.01.2019. Within the paper, the TBEC-2007 and TBEC-2018 were first compared for their soil classification. Since the swellingand liquefaction potential analysis were not been addressed in TBEC-2007, the characteristic swelling and liquefaction analysis forthe site were performed following the specific methodology given in TBEC-2018 using the data obtained from site investigation. Theanalysis results showed considerably high swelling potential at several locations and also showed liquefaction risk at the riparian areasand the shoreline towards the NW-SE direction of the investigation site.As per the emphasis has been given to examination of convenience and comparison of earthquake codes to analyze the risks ofpotential soil problems (as liquefaction, swelling and slope stability), and to take notice of these risks in site specific soil classification bytaking necessary measures, the TBEC-2018 is considered to be more comprehensive with realistic and detailed analysis and methods.