Hello and welcome,
2, 3, and 4 all appear to be vandalism, not actual art per the clarification:
Those 3 all appear to have been done without the consent of the property owner, and 2 and 4 have several tags nearby as well. 3 is quite worn by the elements, another aspect that shows it’s not permanent and possible vandalism.
1 appears to have been done by a former business that was there at one time, a tattoo shop, which can be seen on Street View in August 2018. It appears that after the tattoo shop left and the barbershop opened in its place, the mural was kept by the barbershop.