Zip Code: 21012 (Arnold, MD) - Trend of Active Listing Count of Houses (Realtor)
Updated on March 13, 2026.

According to data from Realtor.com, the active listing count of houses in the 21012 Zip Code in February 2026 was 30. The month over month percentage change (MoM) was 0.0714%, and the year over year percentage change (YoY) was 0.1111%.

You can see similar for other Maryland Zip Codes, and for Maryland.

The chart below shows the trend of active listing count in the 21012 zip code. The table below shows the trend, and the MoM and YoY percentage changes.

Data Source: Realtor.
Zip Code: 21012 - Trend of Active Listing Count of Houses
Zip Code: 21012 Trend of Active Listing Count of Houses
Items per page:
1 – 10 of 116
Month Active Listing Count MoM Perc. Change (%) YoY Perc. Change (%)
Aug 2016 113
Sep 2016 116
Oct 2016 111
Nov 2016 111
Dec 2016 105
Jan 2017 90
Feb 2017 78
Mar 2017 74
Apr 2017 73
May 2017 89
Jun 2017 92
Jul 2017 93
Aug 2017 94 0.0162 -0.1681
Sep 2017 102 0.0851 -0.1207
Oct 2017 93 -0.0882 -0.1584
Nov 2017 94 0.0108 -0.1532
Dec 2017 101 0.0745 -0.0335
Jan 2018 75 -0.2574 -0.1667
Feb 2018 68 -0.1 -0.129
Mar 2018 70 0.037 -0.0541
Apr 2018 81 0.1571 0.1096
May 2018 93 0.142 0.0393
Jun 2018 100 0.0757 0.0874
Jul 2018 100 0.005 0.0811
Aug 2018 110 0.095 0.1649
Sep 2018 109 -0.0046 0.0686
Oct 2018 105 -0.0367 0.129
Nov 2018 106 0.0048 0.1223
Dec 2018 95 -0.0995 -0.0594
Jan 2019 81 -0.1474 0.08
Feb 2019 59 -0.2778 -0.1333
Mar 2019 62 0.0513 -0.1214
Apr 2019 80 0.3008 -0.0123
May 2019 92 0.15 -0.0054
Jun 2019 88 -0.0489 -0.1206
Jul 2019 97 0.1086 -0.03
Aug 2019 107 0.0979 -0.0274
Sep 2019 93 -0.1268 -0.1468
Oct 2019 90 -0.0376 -0.1476
Nov 2019 84 -0.067 -0.2085
Dec 2019 83 -0.006 -0.1263
Jan 2020 61 -0.2711 -0.2531
Feb 2020 60 -0.0165 0.0171
Mar 2020 61 0.0252 -0.0081
Apr 2020 61 0.0 -0.2375
May 2020 64 0.041 -0.3098
Jun 2020 55 -0.1339 -0.3714
Jul 2020 45 -0.1909 -0.5412
Aug 2020 36 -0.191 -0.662
Sep 2020 36 0.0 -0.6129
Oct 2020 32 -0.125 -0.648
Nov 2020 29 -0.0794 -0.6527
Dec 2020 31 0.0517 -0.6325
Jan 2021 24 -0.2131 -0.6033
Feb 2021 19 -0.2083 -0.6807
Mar 2021 12 -0.3947 -0.8115
Apr 2021 15 0.2609 -0.7623
May 2021 19 0.2759 -0.7087
Jun 2021 24 0.2973 -0.5636
Jul 2021 28 0.1667 -0.3708
Aug 2021 40 0.4286 0.1111
Sep 2021 31 -0.2375 -0.1528
Oct 2021 33 0.0656 0.0317
Nov 2021 32 -0.0154 0.1034
Dec 2021 24 -0.25 -0.2131
Jan 2022 20 -0.1875 -0.1875
Feb 2022 12 -0.3846 -0.3684
Mar 2022 14 0.1667 0.2174
Apr 2022 19 0.3571 0.3103
May 2022 21 0.1053 0.1351
Jun 2022 18 -0.1429 -0.25
Jul 2022 26 0.4444 -0.0714
Aug 2022 32 0.2308 -0.2
Sep 2022 34 0.0469 0.0984
Oct 2022 29 -0.1343 -0.1077
Nov 2022 33 0.1379 0.0313
Dec 2022 33 -0.0152 0.3542
Jan 2023 26 -0.2 0.3333
Feb 2023 19 -0.2692 0.5833
Mar 2023 12 -0.3947 -0.1786
Apr 2023 12 0.0435 -0.3684
May 2023 14 0.1667 -0.3333
Jun 2023 16 0.1071 -0.1389
Jul 2023 13 -0.1613 -0.5
Aug 2023 13 0.0 -0.5938
Sep 2023 16 0.2308 -0.5224
Oct 2023 20 0.25 -0.3103
Nov 2023 23 0.15 -0.303
Dec 2023 27 0.1739 -0.1692
Jan 2024 28 0.037 0.0769
Feb 2024 21 -0.2679 0.0789
Mar 2024 15 -0.2927 0.2609
Apr 2024 12 -0.1724 0.0
May 2024 14 0.1667 0.0
Jun 2024 16 0.1071 0.0
Jul 2024 19 0.2258 0.4615
Aug 2024 23 0.2105 0.7692
Sep 2024 17 -0.2609 0.0625
Oct 2024 23 0.3529 0.15
Nov 2024 34 0.4565 0.4565
Dec 2024 26 -0.2239 -0.037
Jan 2025 22 -0.1538 -0.2143
Feb 2025 25 0.1136 0.1951
Mar 2025 27 0.102 0.8621
Apr 2025 27 0.0 1.25
May 2025 43 0.5926 2.0714
Jun 2025 41 -0.0465 1.6452
Jul 2025 49 0.1951 1.5789
Aug 2025 46 -0.0714 0.9783
Sep 2025 42 -0.0769 1.4706
Oct 2025 35 -0.1667 0.5217
Nov 2025 41 0.1571 0.209
Dec 2025 40 -0.0123 0.5385
Jan 2026 34 -0.15 0.5455
Feb 2026 28 -0.1765 0.1429
Mar 2026 30 0.0714 0.1111