In a report issued Monday morning, the National Association of Realtors (NAR) revealed that the median price for an existing single-family home rose in 85% of the 174 U.S. metropolitan statistical areas (MSAs) in the first quarter of 2015, when compared with prices in the same quarter last year. Lower median prices were recorded in just 25 MSAs.

The NAR reported that 51 metro areas posted double-digit increases in the first quarter, up from 37 in the first quarter of 2014 and 24 in the fourth quarter of 2014. The national median existing single-family home price in the first quarter of 2015 was $205,200, up 7.4% from $191,000 in the first quarter a year ago.

According to NAR, the five most expensive housing markets in the first quarter of 2015 were:

1. San Jose, Calif., median existing single-family price of $900,000
2. San Francisco, $748,300
3. Honolulu, $699,300
4. Anaheim-Santa Ana, Calif., $685,700
5. San Diego, $510,300
6. New York City, $466,700
7. Boulder, Colo., $442,200
8. Los Angeles, $434,700
9. Naples-Marco Island, Fla., $405,000
10. Nassau-Suffolk, N.Y., $404,200

ALSO READ: 9 States Running Out of Water

The 10 least expensive metro areas in the first quarter were:

1. Youngstown-Warren-Boardman, Ohio, median existing single-family home price of $64,300
2. Cumberland, Md., $71,600
3. Rockford, Ill., $78,600
4. Decatur, Ill., $82,200
5. Toledo, Ohio, $83,800
6. Akron, Ohio, $95,400
7. Binghamton, N.Y., $96,200
8. Fond du Lac, Wis., $96,600
9. Kankakee-Bradley, Ill., $99,500
10. South Bend-Mishawaka, Ind., $102,100

NAR’s chief economist said:

Sales activity to start the year was notably higher than a year ago, as steady hiring and low interest rates encouraged more buyers to enter the market. However, stronger demand without increasing supply led to faster price growth in many markets. Sales could soften slightly in some of these markets seeing sharp price appreciation unless housing supply markedly improves and tempers its unhealthy level of growth.

Homeowners throughout the country have enjoyed accumulating household wealth through the steady rise in home values in the past few years. However, some homeowners are hesitant to move-up and sell because they aren’t confident they’ll find another home to buy. This trend—in addition to subpar homebuilding activity—is leading to the ongoing inventory shortages and subsequent run-up in prices seen in many markets.

ALSO READ: The Happiest (and Most Miserable) Cities in America

Mortgage interest rates have remained right around 4% or less for most of the year, and national family median income has risen slightly to about $66,250. According to the NAR, in order to purchase a single-family home at the national median price of $205,200, a buyer making a 5% down payment would need an income of $43,466 to qualify for a mortgage. At 10% down, the income requirement drops to $41,178, and with a 20% down payment the income needed drops to $36,603.