Supply and demand factors
Prices in any market come from the balance between supply (homes offered for sale) and demand (buyers who are willing and able to buy).
| Situation | Price tends to |
|---|---|
| Demand grows faster than supply | Rise |
| Supply grows faster than demand | Fall |
| Supply and demand in balance | Hold steady |
Because housing supply is slow to adjust (lesson 1), a change in demand usually shows up in price first and in new construction later.
Demand factors
Interest rates and credit. Most buyers borrow, so the cost of credit decides how much house they can afford. When rates rise, the same monthly budget supports a smaller loan, some buyers drop out and demand falls. When rates fall, buying power and demand rise.
The CFPB gives a real example: mortgage rates rose from a low of 2.65% in January 2021 to a peak of 7.79% in October 2023, adding $1,265 a month to principal and interest on a $400,000 loan. That is a 78% jump in payment for the same loan.
Rates affect supply too. The CFPB found that higher rates also meant fewer homes for sale, because owners with low-rate mortgages were reluctant to move and give up their rate.
Employment and income. Jobs bring buyers and renters. A new employer, rising wages or a growing industry increases demand; layoffs and closures reduce it. Because markets are local, a single large employer can move a whole town's market.
Population and household formation. More people, or more separate households, need more housing. People moving into an area, whether workers following jobs or retirees, add demand; people moving away reduce it.
Other demand factors include buyer confidence, tax rules and lending standards. Tighter lending standards shrink the pool of qualified buyers even if rates do not change.
Supply factors
Construction costs. Land, labor and materials all feed into the cost of building. The St. Louis Fed reports that these costs have risen faster than overall inflation, squeezing builder margins. When building costs rise, fewer projects make financial sense, fewer homes are started, and existing homes gain value because replacing them is more expensive.
Land and regulation. Zoning rules, slow permitting and scarce buildable land near jobs limit how much can be built and where. A Federal Reserve study found that permitting lags and costs explain much of the difference in how quickly supply responds from one market to another, and that areas with strong demand but tight constraints see "rising prices and incomes but little construction."
Time to build. Permits lead completions by several months to a year (St. Louis Fed). Supply that was started during a boom can arrive after demand has cooled.
Existing owners' decisions. Most homes for sale are resales, so anything that makes owners stay put (like a low-rate mortgage) reduces supply.
Putting it together
Ask two questions about any change in the stem:
- Does it change the number of buyers able to buy (demand) or the number of homes offered (supply)?
- Which way?
More demand or less supply pushes prices up. Less demand or more supply pushes prices down.