California Title 24 Window Requirements for Replacement Windows

Taylor Falk18 Oct, 2025Home & Garden

California’s Building Energy Efficiency Standards, better known as Title 24, set the bar for how replacement windows must perform. These rules guard against energy waste, protect indoor comfort, and shape what inspectors look for at final sign-off. If you are planning window replacement Livermore CA, the same statewide energy rules apply, with a few climate-zone nuances that affect glass and shading choices. Under Title 24, doors with at least 25% glass also count as “fenestration,” so they get pulled into the same calculations.