Zip Code: 21771 (Mount Airy, 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 21771 Zip Code in February 2026 was 97.749.

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 21771 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: 21771 - Market Hotness: Trend of Supply Score
Zip Code: 21771 - Market Hotness: Trend of Supply Score
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Month Supply Score
September 2017 71.56513589503281
October 2017 70.4298065559495
November 2017 81.84974747474747
December 2017 55.64875153235692
January 2018 56.386605173450974
February 2018 35.74802055841089
March 2018 30.063846207815896
April 2018 75.85012812521643
May 2018 77.25163755458514
June 2018 70.41813468058234
July 2018 62.56214889907664
August 2018 54.151762902401636
September 2018 62.53487192493026
October 2018 67.23227752639518
November 2018 52.98956026573869
December 2018 64.05165767154973
January 2019 64.2174629324547
February 2019 40.93812238170456
March 2019 39.96536196744025
April 2019 51.33708173340648
May 2019 85.86814845304247
June 2019 76.884286962953
July 2019 77.22953934866653
August 2019 59.30913348946136
September 2019 66.39592599755045
October 2019 61.49625613219726
November 2019 58.781408670745996
December 2019 57.87550654354614
January 2020 55.88809822798939
February 2020 54.33036366291807
March 2020 83.6631114380287
April 2020 74.83301172628767
May 2020 76.71693042699313
June 2020 90.64072710884098
July 2020 82.86288763436703
August 2020 55.62898089171975
September 2020 62.85760860705844
October 2020 87.20442730169378
November 2020 68.33123160992014
December 2020 77.61417739375771
January 2021 75.05431189194294
February 2021 75.89405338555086
March 2021 65.81167350661194
April 2021 91.35040745052386
May 2021 88.84526558891454
June 2021 72.99421460539243
July 2021 49.69213687291814
August 2021 53.5268150652766
September 2021 38.370505234410565
October 2021 51.03678326721962
November 2021 71.89774381368268
December 2021 61.33607198748044
January 2022 83.03423978861609
February 2022 83.58023154487738
April 2022 88.18816231584388
May 2022 57.104400749063664
June 2022 35.42313262983654
July 2022 64.47161248494953
August 2022 53.23421344954286
September 2022 84.34364724728101
October 2022 73.22501480917323
November 2022 90.56022642137684
December 2022 88.53892520587486
January 2023 77.65522149083793
February 2023 54.931467459024255
March 2023 59.482239614689945
April 2023 74.85632183908046
May 2023 67.7002322997677
June 2023 81.24938417578088
July 2023 78.73785491934723
August 2023 86.50412399166137
September 2023 91.94106683234223
October 2023 84.46021027438243
November 2023 85.51496702181633
December 2023 80.41934392965844
January 2024 95.0648892027898
February 2024 96.4128500515126
March 2024 95.49145095042506
April 2024 84.47135537959944
May 2024 64.7883502170767
June 2024 95.75202901053359
July 2024 94.95140833470597
August 2024 94.98754920073902
September 2024 93.48012805496994
October 2024 89.92700729927007
November 2024 89.94327763299096
December 2024 96.98697695923558
January 2025 99.95072273324574
February 2025 95.3064557723717
March 2025 52.291361008026236
April 2025 67.69502353732348
May 2025 93.42619745845552
June 2025 93.55013550135502
July 2025 87.77811184606134
August 2025 85.49245785270631
September 2025 72.5589836660617
October 2025 97.03435804701628
November 2025 88.04639362087713
December 2025 95.17585725824216
January 2026 89.43656513988995
February 2026 96.6556264641732
March 2026 97.74911689805307