The average custodian salary at Gardena was $58,276 , which is 20 percent lower than the average salary for this job in California, and 18 percent lower than the national average for this job . Custodian salaries at Gardena typically range from $38,518 to $80,985 (25th to 75th percentile). The highest reported custodian salary was $88,014. There are 13 employees at Gardena with the job title custodian.