Zip Code: 21791 (Union Bridge, MD) - Market Hotness: Trend of Hotness Score (Realtor)
Updated on March 13, 2026.

According to data from Realtor.com, the market hotness: hotness score for the 21791 Zip Code in May 2020 was 35.721.

You can see similar for other Maryland Zip Codes.

The chart and table below shows the trend of the market hotness: hotness score for the 21791 zip code.

Note: Hotness Score is an equally-weighted composite metric of a geography’s supply score and demand score.

Data Source: Realtor.
Zip Code: 21791 - Market Hotness: Trend of Hotness Score
Zip Code: 21791 - Market Hotness: Trend of Hotness Score
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Month Hotness Score
September 2017 84.09871915026554
October 2017 72.54462897306712
November 2017 69.56123737373737
December 2017 53.41957545648106
January 2018 51.20312813314618
May 2018 74.46097161572052
July 2018 48.915219216116746
August 2018 57.99693408277977
September 2018 82.61793050976414
October 2018 66.59439416792358
November 2018 54.24232837709586
December 2018 80.90465176047289
April 2019 31.79168952276467
May 2019 36.746244083144674
June 2019 27.412089020372488
July 2019 27.865146451739733
August 2019 28.981264637002344
September 2019 35.37033455811255
October 2019 42.8705138135812
November 2019 46.81356594193465
December 2019 51.37181957084967
January 2020 41.00739500488349
February 2020 37.98013728640281
June 2020 35.720724104259