Home Prices Stay High Amid Supply Shortages and Mortgage Lock-In

Why It Matters

The persistence of high prices limits affordability for first‑time buyers and reduces market mobility, signaling that price declines are unlikely without significant new construction or a substantial drop in mortgage rates.

Key Takeaways

• US housing supply gap ~4.0 million homes in 2025.
• Homeowner vacancy rate fell to 1.2% in late‑2025.
• Each 1‑point rate rise cuts selling likelihood by 18.1%.
• Over 1 million sales stalled between 2022‑2023 due to lock‑in.
• First‑time buyers made up only 21% of 2025 purchases.

Pulse Analysis

The United States continues to wrestle with a deep structural housing shortage that predates the recent surge in mortgage rates. Realtor.com estimates a deficit of about 4.03 million units in 2025, while the homeowner vacancy rate slipped to a historic low of 1.2% at the end of 2025. These metrics illustrate why median list prices have remained flat year‑over‑year and why the Case‑Shiller index still records modest annual gains, even as transaction volume contracts.

Compounding the shortage is the so‑called lock‑in effect. Homeowners who locked in sub‑5% mortgages during the pandemic now face a market where the average 30‑year rate sits near 6.4%, according to Freddie Mac. FHFA research shows that each percentage‑point increase between a homeowner’s existing rate and the prevailing rate reduces the probability of selling by 18.1%, a dynamic that stalled more than one million sales between 2022 and 2023. This behavioral friction keeps existing inventory on the market longer, dampening the impact of modest listing increases.

For buyers, especially first‑time purchasers, the combination of high prices and elevated financing costs curtails entry. The National Association of Realtors reports that first‑time buyers accounted for only 21% of 2025 home purchases, with the median buyer now age 40. Market mobility is further constrained as owners stay put, limiting opportunities for move‑up buyers. Unless construction ramps up dramatically or rates retreat to pre‑2022 levels, the supply‑driven price support is likely to persist, shaping the outlook for both real‑estate professionals and prospective homeowners.