New Delhi, July 14 -- it is interest accruing on a construction loan, material costs fluctuating across an extended build window, and a closing date that keeps moving.

the construction industry is short approximately 250,000 workers monthly, a figure that has reached as high as 400,000 during peak building periods.

The labor deficit is not a temporary gap. NAHB chief executive Jim Tobin called labor "one of the largest and most expensive inputs when it comes to home production and land development." The shortage, at its current scale, is structural rather than cyclical, meaning it cannot be resolved by a single hiring push or a training initiative with a six-month timeline.

The Home Builders Institute, which runs apprenticeship program...