The average custodian salary at La Mesa was $79,063 , which is 8 percent higher than the average salary for this job in California, and 11 percent higher than the national average for this job . Custodian salaries at La Mesa typically range from $79,046 to $79,080 (25th to 75th percentile). The highest reported custodian salary was $79,080. There are 2 employees at La Mesa with the job title custodian.