Residential & Commercial Garage Doors in San Diego, Repair and Maintenance. 24 Hour Service. Here at Castle Garage Doors and Gates, we pride ourselves on our exemplary garage door service. San Diego calls us with a lot of various issues – Broken springs, sensors not working, damaged panels, garage door opener not working, garage door not closing… you name it, and we can repair it. We also offer free garage door estimates and even work on Saturdays to make sure we can work around customers that are not able to take a day off during the work week.