The total market share of non-site built single-family homes (modular and panelized) was at 2% of single-family completions in 2021, according to Census Bureau Survey of Construction data and NAHB analysis. This share has been steadily declining since early-2000s despite the high-level of interest for non-site built construction. In 2021, there were 24,000 total single-family units built using modular (10,000) and panelized/pre-cut (14,000) construction methods, out of a total of 970,000 total single-family homes completed. …This 2% market share for 2021 represents a decline from years prior to the Great Recession. In 1998, 7% of single-family completions were modular (4%) or panelized (3%). …One notable regional concentration is found in the Midwest where 6% (7,000 homes) of the region’s 125,000 housing units were completed using non-site build construction methods, the highest share in the country.