Zip Code: 21655 (Preston, MD) - Market Hotness: Trend of Supply Score (Realtor)
Updated on March 13, 2026.

According to data from Realtor.com, the market hotness: supply score for the 21655 Zip Code in February 2026 was 38.084.

You can see similar for other Maryland Zip Codes.

The chart and table below shows the trend of the market hotness: supply score for the 21655 zip code.

Note: Supply Score is an index representing the metro's median days on market ranking compared to other metros.

Data Source: Realtor.
Zip Code: 21655 - Market Hotness: Trend of Supply Score
Zip Code: 21655 - Market Hotness: Trend of Supply Score
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Month Supply Score
September 2017 58.44423617619494
October 2017 65.77097717235803
November 2017 57.46212121212121
December 2017 34.49254790631653
January 2018 24.5037096450772
February 2018 26.31615502153077
March 2018 7.500175401669824
April 2018 2.5486529538056653
May 2018 2.4563318777292573
June 2018 18.845974872033505
July 2018 13.456447342932782
August 2018 26.098620337250892
September 2018 64.04387522191224
October 2018 61.87154348919055
March 2019 78.55213023900242
April 2019 79.7654964344487
May 2019 51.40975509364066
June 2019 45.108586028373566
July 2019 48.86311513007011
August 2019 21.66926880041634
September 2019 13.633726551924191
October 2019 10.41182545830106
November 2019 10.343705246712668
December 2019 22.23477047764565
January 2020 5.895074647690805
September 2025 99.07803992740472
October 2025 84.81012658227847
November 2025 76.97716563972455
December 2025 63.727145899111534
February 2026 88.31892721544551
March 2026 38.08428489279553