NAHB analysis of the Survey of Construction (SOC) shows that 72.4% of new single-family homes started in 2023 were built on slab foundations, 16.6% were built with full or partial basements, and 9.9% with crawl spaces. The share of new homes built on slabs has risen steadily from 45.8% in 2000 to 72.4% in 2023….