Energy Efficient Home Rebate Program

The City of San Marcos offers rebates for energy efficient heating and AC upgrades including HVAC systems, attic/wall insulation, duct sealing/replacement, radiant barrier, windows and doors, solar window film and screen, and window AC units. The program is open to City of San Marcos residential electric utility customers.

Here's How it Works


  • Customer contacts the City to schedule a free energy audit. During the audit, city staff will evaluate existing HVAC equipment, insulation types/levels, duct leakage, and windows/doors. Staff will make recommendations, and provide information on rebate programs.
  • Customer purchases qualified products and has them installed.
  • Within 90 days after purchase, customer submits application (PDF) along with dated and itemized sales receipts.
  • COSM conducts follow-up inspection to verify products have been properly installed.
  • Rebate check is applied as credit on utility bill.
For more information or to schedule your energy audit email Devin Hussey or call 512-393-8308.