Zip Code: 21228 (Catonsville, 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 21228 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 21228 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: 21228 - Market Hotness: Trend of Supply Score
Zip Code: 21228 - Market Hotness: Trend of Supply Score
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Month Supply Score
September 2017 82.13683223992503
October 2017 81.66324563040368
November 2017 84.57070707070707
December 2017 82.84405445512614
January 2018 87.75482922264555
February 2018 88.79705514654813
March 2018 80.29186837858695
April 2018 80.53189279035944
May 2018 91.87363537117903
June 2018 89.06468124709167
July 2018 69.84567701943566
August 2018 87.32115482881963
September 2018 75.83058584833883
October 2018 69.18677727501257
November 2018 85.40968048086049
December 2018 96.84528398869186
January 2019 87.50576606260296
February 2019 94.91106380056314
March 2019 80.76203671631451
April 2019 81.41113549094898
May 2019 92.4744460451396
June 2019 91.75015128084448
July 2019 75.32271803944695
August 2019 78.44782721831902
September 2019 92.93495777734803
October 2019 97.32765298218436
November 2019 97.7281603957818
December 2019 93.6225337142098
January 2020 87.08664713269151
February 2020 88.28684095224186
March 2020 98.52151526296431
April 2020 96.8235119489387
May 2020 96.00627052851598
June 2020 96.35694434011867
July 2020 95.84718892583713
August 2020 89.18789808917198
September 2020 98.08460347216563
October 2020 98.39845715244005
November 2020 78.29340058848256
December 2020 79.74783988714512
January 2021 86.76678945877019
February 2021 76.17231783984334
March 2021 79.9703602371181
April 2021 98.26542491268917
May 2021 90.62355658198614
June 2021 72.99421460539243
July 2021 88.61411123448067
August 2021 90.73917535455996
September 2021 85.60764679107874
October 2021 71.37576631806708
November 2021 71.89774381368268
December 2021 80.98591549295774
January 2022 86.1719696135638
February 2022 82.0988422756131
April 2022 80.65391574050142
May 2022 94.80337078651685
June 2022 88.47506724601698
July 2022 95.97110308419006
August 2022 98.60719473639237
September 2022 96.28193238344153
October 2022 94.76178387069476
November 2022 94.69741113793391
December 2022 86.66270481365142
January 2023 88.72976338729764
February 2023 87.33825361832646
March 2023 75.84788280152519
April 2023 95.00205254515599
May 2023 95.78830421169579
June 2023 88.29441324268402
July 2023 89.61418734081691
August 2023 90.80032629384573
September 2023 93.10375432679507
October 2023 78.57936575775707
November 2023 98.07204464738712
December 2023 99.3151843084207
January 2024 96.6893263882758
February 2024 79.25447223002716
March 2024 84.63081478651256
April 2024 99.31066604564509
May 2024 93.9308972503618
June 2024 93.80935935071662
July 2024 93.46071487399111
August 2024 97.50180737408627
September 2024 99.67205434527993
October 2024 90.04225893200154
November 2024 99.84669630538096
December 2024 99.5530554057178
January 2025 99.45795006570303
February 2025 99.37247485601307
March 2025 99.54259083455597
April 2025 99.04169468728985
May 2025 98.01238188334963
June 2025 99.11730545876888
July 2025 93.37041491280817
August 2025 98.6024844720497
September 2025 93.502722323049
October 2025 93.04882459312839
November 2025 90.37332366799565
December 2025 92.10661575739776
January 2026 92.14911260947066
February 2026 95.26617658938525
March 2026 88.2362605766861