Policymakers nationwide are pushing duplexes, townhomes, and small multifamily buildings as affordability solutions, but the strategy does not guarantee cheaper housing. The "missing middle" housing debate assumes that removing zoning restrictions and allowing more small multifamily properties will automatically lower costs. This assumption overlooks a critical reality: supply alone does not determine affordability without addressing underlying land costs, construction expenses, and local market dynamics.
Duplexes and townhomes in high-demand markets often price at premium levels because land value and construction costs remain constant regardless of unit count. A developer building a duplex on expensive urban land faces the same acquisition and labor costs as a traditional single-family home project. Splitting those expenses across two units does not necessarily reduce per-unit pricing if the market supports higher rents or sale prices. In competitive neighborhoods, new duplexes frequently sell for more than older single-family homes nearby.
The missing middle approach also ignores how zoning reform interacts with property taxes, financing, and neighborhood economics. When areas upzone to allow multifamily development, property values often rise immediately. Existing homeowners see tax assessments climb. Landlords capitalize on new zoning allowances by raising rents. Lenders adjust financing terms based on higher appraised values. These cascading effects can offset any affordability gains from increased supply.
For buyers, missing middle housing offers more product choice but not necessarily lower entry prices. Townhomes appeal to those seeking more space than condos but less maintenance than single-family homes. Yet in markets where land is scarce, even smaller units command steep prices.
For renters and landlords, duplexes and townhomes expand the rental inventory. Smaller multifamily properties attract individual investors seeking stable returns without managing large complexes. Tenants gain options but face rent increases tied to market appreciation rather