The average custodial salary at Northside Isd was $25,102 , which is 5 percent lower than the average salary for this job in Texas, and 24 percent lower than the national average for this job . Custodial salaries at Northside Isd typically range from $22,027 to $27,442 (25th to 75th percentile). The highest reported custodial salary was $58,049. There are 799 employees at Northside Isd with the job title custodial.