A new study shows how to turn broad building‑electrification plans into realistic costs for the street‑level power network. The researchers created a tool that takes a county‑wide estimate of how many homes will switch from gas to electric heating, plugs the numbers into a library of typical distribution feeders, and then builds realistic load patterns for each feeder. Using Genesee County, Michigan, the authors demonstrated the approach can reproduce a range of feeder behaviours that arise when different groups of houses electrify at different times. These diverse feeder responses lead to more accurate estimates of the equipment upgrades required, such as transformer or cable upgrades, compared with older methods that lump all demand together. The paper notes the method does not yet consider local solar or wind generation, and it does not plan voltage‑regulator upgrades because the electrification scenarios studied do not create reverse power flows. The results highlight that a single county‐level projection can hide important local grid stresses and that a feeder‑level view is needed to plan a reliable electrification path.