Signals That a Local Housing Market May Be Overheating

Months of supply measures how long it would take to sell all current listings at the existing pace of sales. A balanced market generally sits between four and six months. When supply dips below three months — and especially below two — demand is outpacing inventory significantly. Sellers gain pricing power, and buyers face fewer choices and more competition. Local multiple listing service (MLS) data or county assessor reports often publish this figure monthly.

The list-to-sale price ratio compares what sellers ask for a property versus what buyers actually pay. In a balanced market, most homes close at or slightly below list price. When a significant share of sales consistently close above asking — sometimes by 5%, 10%, or more — buyers are bidding against each other rather than negotiating with sellers. Tracking this ratio over two or three months reveals a trend more reliably than any single transaction.

Days on market (DOM) tracks how long a listing sits before going under contract. A sharp, sustained drop in average DOM — say, from 45 days to under 10 — indicates that buyers are acting fast and inventory is being absorbed almost immediately. When new listings attract multiple offers within 24 to 48 hours, the market has likely crossed into overheated territory for that price tier or neighborhood.

In competitive markets, buyers sometimes waive their right to a home inspection or agree to cover any gap between the appraised value and the purchase price. These are significant financial protections, and their widespread removal is a red flag for market intensity. When waiving contingencies becomes a near-requirement to have an offer accepted, buyers are assuming elevated risk — and the market is almost certainly overheated.

All-cash purchases eliminate financing contingencies and appraisal risk for sellers, making them highly attractive. Tracking the share of cash transactions in a zip code or county — available through public deed records — can reveal when investor activity or relocated buyers with substantial liquidity are dominating a local market. A sharp uptick in cash deals often precedes or accompanies rapid price appreciation.

Sustainable price appreciation roughly tracks with local income growth and inflation over time. When home values rise 15%, 20%, or more year-over-year while median wages in the area grow at 3–4%, affordability erodes quickly. This mismatch compresses the pool of qualified buyers over time, often preceding a market plateau or correction. Local Federal Reserve branch reports and county-level data from the U.S. Census Bureau's American Community Survey can provide wage context alongside MLS price data.