Well, it's technically a river so.nor sure about Beachfront but I'm sure it's possible. As an example, if you look at Varanasi you do see so many people living right next to the river. However, building next to rivers is also probably not recommended because of silty alluvial soils and seasonal flooding. Not to mention that the river is plenty polluted as of now so it's not like living next to it is a particular value add if you have the funds