Zillows has reported a five-percent rise in sales in the first half of the year.
The median home price rose 3.3% in April to $4,852,832, according to Zillotips.
The price index is an average of the three largest cities and five other major metropolitan areas.
Home prices in the South increased 2.4%.
Median incomes rose 1.4%, while the median income for renters was up 0.4 percentage points to $36,566.
The index also showed that median incomes for men and women rose slightly in April.