Zip Code: 21057 (Glen Arm, 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 21057 Zip Code in August 2019 was 55.457.

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 21057 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: 21057 - Market Hotness: Trend of Supply Score
Zip Code: 21057 - Market Hotness: Trend of Supply Score
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Month Supply Score
November 2017 83.13131313131314
August 2018 55.69110884006132
September 2018 30.490743089018512
October 2018 35.42609351432881
November 2018 23.22682695349573
December 2018 41.467489077358
January 2019 26.85996705107084
June 2019 78.74672224836952
July 2019 56.89011205032436
August 2019 35.36299765807963
September 2019 55.45671372397344