Zip Code: 21227 (Halethorpe, 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 21227 Zip Code in February 2026 was 88.236.

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 21227 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: 21227 - Market Hotness: Trend of Supply Score
Zip Code: 21227 - Market Hotness: Trend of Supply Score
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Month Supply Score
September 2017 85.64198687910029
October 2017 81.66324563040368
November 2017 86.26262626262627
December 2017 81.5923607974708
January 2018 89.70657041641601
February 2018 86.92874010279206
March 2018 77.45036132743984
April 2018 86.33561881016692
May 2018 84.375
June 2018 85.83394269760021
July 2018 90.92141796345322
August 2018 96.44864588656105
September 2018 83.55313213289374
October 2018 81.71191553544494
November 2018 80.29104713698196
December 2018 81.79131328707273
January 2019 78.00329489291597
February 2019 73.70372913948218
March 2019 38.967786629719434
April 2019 50.226275370268795
May 2019 87.43911641627221
June 2019 85.84683654945204
July 2019 77.22953934866653
August 2019 91.76424668227948
September 2019 86.84329272223297
October 2019 77.05267234701782
November 2019 81.07017315453717
December 2019 91.98830797847604
January 2020 79.55909027487094
February 2020 70.42500365123412
March 2020 59.85288709084222
April 2020 94.56731482855871
May 2020 93.84144520752463
June 2020 73.9052054382934
July 2020 92.25117933647823
August 2020 97.85828025477707
September 2020 91.62930964218762
October 2020 97.61864833137682
November 2020 73.55191256830601
December 2020 85.00264503614883
January 2021 91.69736469254747
February 2021 86.63300010306091
March 2021 83.21933424532604
April 2021 69.98835855646101
May 2021 92.4133949191686
June 2021 64.57810282720227
July 2021 63.80337135358837
August 2021 82.16398985629755
September 2021 76.36777423759672
October 2021 92.31878831590336
November 2021 79.73071324599708
December 2021 76.6725352112676
January 2022 66.07948915556534
February 2022 70.63363625046682
March 2022 56.04601391118245
April 2022 50.47815973119669
May 2022 81.53089887640449
June 2022 89.72687771570453
July 2022 46.80003704732796
August 2022 80.18456805947193
September 2022 68.147710985583
October 2022 78.48015570787848
November 2022 73.55365021227004
December 2022 79.37855505560744
January 2023 77.65522149083793
February 2023 87.50119812134572
March 2023 66.42584788280152
April 2023 96.74671592775042
May 2023 94.26320573679426
June 2023 86.32377574145235
July 2023 89.92547872842185
August 2023 92.07831052297652
September 2023 87.52995473506701
October 2023 96.02530130780409
November 2023 94.79959411466261
December 2023 87.17450118363206
January 2024 99.80577381477885
February 2024 93.13477568605414
April 2024 97.06567303213787
June 2024 99.71507511656019
July 2024 93.46071487399111
August 2024 84.26379628885854
September 2024 94.33903334114156
October 2024 98.4095274683058
November 2024 98.8195615514334
December 2024 95.29166987747554
January 2025 92.52628120893561
February 2025 96.50992865125076
March 2025 92.81090877707776
April 2025 94.72091459314055
May 2025 99.75562072336265
June 2025 95.27680991095625
July 2025 98.44407696933253
August 2025 95.578231292517
September 2025 97.83666061705989
October 2025 97.16455696202532
November 2025 94.83870967741936
December 2025 99.41258535869007
January 2026 96.32643571262497
February 2026 95.26617658938525
March 2026 88.2362605766861