Short answer. The median size of a new single-family home built in 2023 was approximately 2,191 square feet. The median existing home is roughly 1,800 square feet, reflecting the older average construction date of the existing-home stock.
U.S. home-size data comes from two primary sources: the Census Bureau's Survey of Construction (for new homes) and the American Housing Survey (for the existing housing stock).
New home median size (2023)
- Single-family detached: 2,191 sq ft
- Single-family attached (townhomes): 1,820 sq ft
- Multifamily (apartments and condos): 1,143 sq ft (median per unit)
The new-home-size cycle
U.S. new home sizes peaked in 2015 at approximately 2,650 sq ft median — a 75% increase over 1973 levels. Since 2015, new-home sizes have been gradually declining as builders responded to affordability pressure by introducing smaller starter homes.
Existing housing stock
The American Housing Survey (most recent: 2021) shows the median existing single-family home at approximately 1,800 square feet — meaningfully smaller than the new-construction median because the existing stock includes a large number of pre-1990 homes built before the size-creep era.
Regional variation
New-home sizes vary significantly by region:
- South: ~2,250 sq ft median (largest)
- Midwest: ~2,150 sq ft
- West: ~2,120 sq ft
- Northeast: ~1,980 sq ft (smallest, reflecting urbanized markets)
The "size creep" debate
U.S. homes are roughly 50% larger than the post-war average — and yet household sizes have shrunk from 3.7 (1960) to 2.5 (2024). The combination has produced a 2-3× increase in living space per person — a key driver of why new-home prices have outpaced wages.
Sources
U.S. Census Bureau Survey of Construction; National Association of Realtors Existing Home Sales report; Freddie Mac Primary Mortgage Market Survey; National Bureau of Economic Research Business Cycle Dating Committee.