For residential rental property, what is the standard straight-line MACRS depreciation period?

Under the Modified Accelerated Cost Recovery System (MACRS), residential rental property is depreciated over 27.5 years using the straight-line method. Commercial real estate uses a 39-year period instead. Only the building structure is depreciable; land is not. This depreciation deduction can significantly reduce taxable rental income each year, though depreciation taken must be recaptured at a 25% rate when the property is eventually sold.