Zip Code: 21128 (Perry Hall, 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 21128 Zip Code in February 2026 was 81.048.

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 21128 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: 21128 - Market Hotness: Trend of Supply Score
Zip Code: 21128 - Market Hotness: Trend of Supply Score
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Month Supply Score
September 2017 57.4445485785692
October 2017 49.816508054985384
November 2017 74.93055555555556
December 2017 75.65649396735273
January 2018 78.2300648352383
February 2018 54.64647867759411
March 2018 62.49912299165088
April 2018 86.33561881016692
May 2018 74.87036026200873
June 2018 81.16067273815062
July 2018 73.77800736101247
August 2018 61.113949923352074
September 2018 69.40781131118437
October 2018 50.301659125188536
November 2018 43.88484656754192
December 2018 32.960678488820356
January 2019 35.95387149917627
February 2019 36.43980495845066
March 2019 89.53931416695532
April 2019 91.80608886450905
May 2019 71.82547849351718
June 2019 86.14267464533046
July 2019 73.1800013105301
August 2019 61.05256310174343
September 2019 68.33623412621672
October 2019 64.98192615543506
November 2019 56.09295664627002
December 2019 52.33508270776589
January 2020 35.01465048137296
February 2020 52.72382065138017
March 2020 76.31482162559765
April 2020 95.75478699717975
May 2020 95.68527918781726
June 2020 85.45031172538121
July 2020 88.97997061325496
August 2020 74.03662420382166
September 2020 95.85948325046866
October 2020 88.44541338252557
November 2020 49.24758301807482
December 2020 72.8002116028919
January 2021 67.02559743081137
July 2021 57.85808014535178
September 2021 75.43923532089212
December 2021 53.39397496087636
August 2022 94.09553106041186
September 2022 92.98541438327291
October 2022 83.76914614538377
November 2022 50.73670190626821
December 2022 34.502079972833
June 2023 98.71908562419944
August 2023 63.699809661923325
September 2023 64.5779710659448
October 2023 47.149329002478844
November 2023 42.09369186538136
December 2023 88.1552248900913
January 2024 47.55010152732409
February 2024 83.92806968249509
March 2024 80.51389817556596
April 2024 84.47135537959944
August 2024 96.63426781267572
September 2024 91.42656359803233
November 2024 97.29418978997394
December 2024 87.82461277645064
January 2025 43.97996057818659
February 2025 72.81010917218258
March 2025 99.29231034780356
April 2025 96.4862138533961
May 2025 81.90778755294885
June 2025 98.69918699186991
July 2025 88.71767889356585
August 2025 78.6379769299024
September 2025 80.47186932849365
October 2025 97.94575045207957
November 2025 99.5360637912287
December 2025 92.10661575739776
January 2026 59.33503836317136
February 2026 55.901122869375556
March 2026 81.04822147375339