During the early 1960s, the average new American home measured approximately 1,300 square feet. By 2024, the typical newly constructed residence exceeded 2,300 square feet, while average household size over the same period fell from 3.33 to 2.51 persons. U.S. Bureau of the Census and U.S. Department of Housing and Urban Development, New One-Family Homes Sold and For Sale, 1963 to 1967 (Washington, D.C.: U.S. Government Printing Office, 1968). U.S. Census Bureau and U.S. Department of Housing and Urban Development, Characteristics of New Housing: 2024 (Washington, D.C.: U.S. Government Printing Office, 2025). See Table HH-4. Households by Size: 1960 to Present in “Historical Households Tables,” U.S. Census Bureau, December 2025, ➝.
The “bonus room” is a predominantly American real estate listing category for any room that doesn’t fit the standard taxonomy of bedroom, bathroom, kitchen, living room, or dining room. Its prevalence in new construction listings is an accurate measure of how thoroughly the financing system has outpaced the imagination of the households it serves.
The embodied carbon of a typical new single-family house in North America varies based on the scope of the assessment; while a basic structure may range from 39 to 121 kg CO₂e/m², comprehensive empirical data for completed homes show an average of 197 kg CO₂e/m². Matt Jungclaus et al., “Embodied Carbon Benchmarks of Single-family Residential Buildings in the United States,” Sustainable Cities and Society 117 (2024).
“Highest and best use” is a concept in real estate appraisal influenced by the economist Irving Fisher, whose work on maximum productivity and capital theory provided its theoretical basis. The adopted definition is: “The reasonably probable and legal use of vacant land or an improved property that is physically possible, appropriately supported, financially feasible, and that results in the highest value.” Appraisal Institute, The Dictionary of Real Estate Appraisal, 6th ed. (Chicago: Appraisal Institute, 2015), 109.
See Lizabeth Cohen, A Consumer’s Republic: The Politics of Mass Consumption in Postwar America (New York: Knopf, 2003).
Empirical studies find that new large-footprint construction measurably lowers reported satisfaction among owners of nearby smaller houses and significantly increases the likelihood of debt-financed expansion. Clément Bellet, “The McMansion Effect: Top House Size and Positional Externalities in U.S. Suburbs,” Journal of Public Economics 238 (2024).
The Federal Housing Administration was established by the National Housing Act of 1934. Its Underwriting Manual, first issued in 1935, encoded racial homogeneity, single-use zoning, and spatial uniformity as conditions of creditworthiness. Kenneth T. Jackson, Crabgrass Frontier: The Suburbanization of the United States (Oxford University Press, 1985), 190–230.
Fannie Mae, “B4-1.3-08, Comparable Sales,” in Selling Guide: Appraisal Report and Data Delivery Requirements (current edition), ➝; Fannie Mae, Uniform Residential Appraisal Report (Form 1004).
The conforming loan limit was established by the Emergency Home Finance Act of 1970 at $33,000. The Housing and Community Development Act of 1980 indexed future increases to changes in average national home prices. By 2006 the limit had reached $417,000; for 2026 it stands at $832,750. “Mortgage Market Note 07-2: Historical Trends in the Conforming Loan Limit,” Federal Housing Finance Agency, 2007.
In place of conventional zoning, land use in Houston is in part governed by thousands of private deed restrictions, each negotiated at the subdivision level, inconsistent in coverage and in enforcement, leaving nearly three quarters of the city's urban landscape subject to no land-use regulation of any kind. Parking requirements are the closest the city comes to uniform development control. Zhu Qian, “Without Zoning: Urban Development and Land Use Controls in Houston,” Cities 27, no. 1 (2010): 31–41.
“203(k) Rehabilitation Mortgage Insurance Program,” U.S. Department of Housing and Urban Development, ➝.
