National Price Overview
US home prices continued their upward trajectory in 2025, with the S&P CoreLogic Case-Shiller National Index rising approximately 4.1% year-over-year despite elevated mortgage rates. The persistence of price growth in a high-rate environment reflects the dominant force of supply constraints over demand-side affordability pressures.
Supply — The Dominant Force
The structural housing shortage — estimated at 4–7 million units nationally — is the primary driver of sustained price appreciation. Contributing factors:
- Lock-in effect — Homeowners with 2.5–3.5% mortgages from 2020–2021 are reluctant to sell and take on 6.8% loans. This trapped an estimated 30M+ potential sellers in 2025–2026.
- Underbuilding — US housing construction averaged ~1.2M units/year for a decade post-GFC, well below the 1.5–1.8M needed to keep pace with household formation.
- Zoning constraints — Single-family-only zoning in desirable metro areas limits density and infill development, constraining supply response.
The Lock-In Effect Explained
A homeowner with a $400K mortgage at 3.0% pays $1,686/month. Moving to a similar home at current prices with a 6.8% rate on $430K means paying $2,808/month — a $1,122/month increase for equivalent housing. This disincentive to move is suppressing transaction volume by an estimated 25–30% below historical norms.
Regional Price Dynamics
| Market | Median Price | YoY Change | Months Supply | Trend |
|---|---|---|---|---|
| New York Metro | $585K | +5.2% | 2.8 mo | Rising |
| Miami-Fort Lauderdale | $630K | +6.1% | 3.0 mo | Rising |
| San Jose / Silicon Valley | $1.6M | +7.3% | 2.1 mo | Surging |
| Austin, TX | $485K | –1.2% | 4.8 mo | Stabilizing |
| Phoenix, AZ | $425K | +2.1% | 3.5 mo | Flat |
| Detroit, MI | $215K | +8.4% | 3.2 mo | Rising fast |
Affordability Stress
At a 6.8% rate on a $420,000 median-priced home with 10% down, the monthly PITI is approximately $2,800. The 28% front-end DTI rule requires a gross annual income of $120,000+ to qualify — a threshold that 65% of US households don't meet. This affordability gap is historically unprecedented and is reshaping the first-time buyer demographic.
Consensus among housing economists projects 2–4% national price appreciation in 2027 if rates remain near current levels, with supply constraints continuing to prevent meaningful price corrections in supply-constrained coastal markets. Sunbelt markets with elevated inventory may see flat-to-slight-negative appreciation.
