Custodian I salary at Cupertino Union

The average custodian i salary at Cupertino Union was $56,740 , which is 2 percent lower than the average salary for this job in California, but 4 percent higher than the national average for this job . Custodian I salaries at Cupertino Union typically range from $45,118 to $71,398 (25th to 75th percentile). The highest reported custodian i salary was $86,041. There are 9 employees at Cupertino Union with the job title custodian i.