<![CDATA[The role of the people of Banjarmasin City has long made the river a center of activity that has a dependence on river culture as a way of life, behavior, and adaptation the river boundary for generations, including the construction of buildings. This activity has an impact on the uncontrollability of buildings. And the function of the river. The study aimed to assess the extent of the distribution and non-conformity of buildings with river boundary regulations stipulated in Banjarmasin City Regional Regulation No. 31/2012 concerning the Determination of Regulation and Utilization of Rivers and Former Rivers. The method used is descriptive quantitative with spatial analysis techniques on visual image interpretation and river area buffering within 15 meters of the left and right banks of the river. Data analysis used an overlay technique to determine the number of buildings within the Martapura River boundary line in Banjarmasin City. The results showed that, over 15 years from 2008 to 2023, the built-up land area changed by an average of 1.30 hectares. Based on the type of built-up land, the most dominant is residential buildings. Non-conforming buildings in 2008 totaled 3,518 buildings, in 2013 totaled 3,365 buildings, in 2018 totaled 3,321 buildings, and in 2023 totaled 3,301 buildings. The decrease in non-conforming buildings occurred periodically in Central Banjarmasin District, and the increase in the number of non-conforming buildings was spread in South Banjarmasin District and North Banjarmasin District.Received: 2024-10-01 Revised: 2025-11-10 Accepted: 2025-12-11 Published: 2025-12-22 ]]>
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