KMI Cost Index – April 2026 KMI’s April 2026 Cost Index reflects a stable but complex construction cost environment, with overall building, construction, and labor costs holding flat at 0.00% month-over-month, indicating a predictable bidding climate. However, beneath this stability, commodity-level volatility persists, with cement (+1.60%) and structural steel (+1.20%) continuing to rise, while plywood (+0.80%) and gypsum (+0.20%) show incremental increases and…