The average custodian salary at Oakland was $111,218 , which is 52 percent higher than the average salary for this job in California, and 57 percent higher than the national average for this job . Custodian salaries at Oakland typically range from $103,611 to $121,540 (25th to 75th percentile). The highest reported custodian salary was $128,512. There are 51 employees at Oakland with the job title custodian.