Zip Code: 21057 (Glen Arm, 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 21057 Zip Code in February 2026 was 4. The month over month percentage change (MoM) was -0.5625%, and the year over year percentage change (YoY) was -0.3%.

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

The chart below shows the trend of active listing count in the 21057 zip code. The table below shows the trend, and the MoM and YoY percentage changes.

Data Source: Realtor.
Zip Code: 21057 - Trend of Active Listing Count of Houses
Zip Code: 21057 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 19
Sep 2016 18
Oct 2016 21
Nov 2016 21
Dec 2016 15
Jan 2017 13
Feb 2017 11
Mar 2017 10
Apr 2017 10
May 2017 14
Jun 2017 13
Jul 2017 12
Aug 2017 13 0.0833 -0.3158
Sep 2017 12 -0.0769 -0.3333
Oct 2017 11 -0.0833 -0.4762
Nov 2017 15 0.3636 -0.2857
Dec 2017 14 -0.1 -0.1
Jan 2018 11 -0.1852 -0.1538
Feb 2018 8 -0.3182 -0.2857
Mar 2018 5 -0.4 -0.55
Apr 2018 6 0.3333 -0.3684
May 2018 7 0.0833 -0.5357
Jun 2018 11 0.6923 -0.12
Jul 2018 13 0.1818 0.0833
Aug 2018 15 0.1538 0.1538
Sep 2018 18 0.1667 0.4583
Oct 2018 18 0.0286 0.6364
Nov 2018 17 -0.0556 0.1333
Dec 2018 18 0.0588 0.3333
Jan 2019 14 -0.2222 0.2727
Feb 2019 8 -0.4643 0.0
Mar 2019 7 -0.1333 0.4444
Apr 2019 8 0.2308 0.3333
May 2019 11 0.3125 0.6154
Jun 2019 15 0.4286 0.3636
Jul 2019 17 0.1333 0.3077
Aug 2019 16 -0.0588 0.0667
Sep 2019 15 -0.0625 -0.1429
Oct 2019 14 -0.0667 -0.2222
Nov 2019 13 -0.0714 -0.2353
Dec 2019 10 -0.2308 -0.4444
Jan 2020 6 -0.45 -0.6071
Feb 2020 6 0.0909 -0.2
Mar 2020 5 -0.1667 -0.2308
Apr 2020 4 -0.3 -0.5625
May 2020 8 1.1429 -0.2857
Jun 2020 9 0.2 -0.4
Jul 2020 7 -0.2222 -0.5882
Aug 2020 8 0.0714 -0.5313
Sep 2020 3 -0.6 -0.8
Oct 2020 3 -0.1667 -0.8214
Nov 2020 4 0.6 -0.6923
Dec 2020 3 -0.375 -0.75
Jan 2021 2 -0.2 -0.6364
Feb 2021 1 -0.5 -0.8333
Mar 2021 2 1.0 -0.6
Apr 2021 3 0.5 -0.1429
May 2021 4 0.1667 -0.5333
Jun 2021 4 0.1429 -0.5556
Jul 2021 4 -0.125 -0.5
Aug 2021 3 -0.1429 -0.6
Sep 2021 3 0.0 0.0
Oct 2021 4 0.1667 0.4
Nov 2021 2 -0.4286 -0.5
Dec 2021 6 2.0 1.4
Jan 2022 6 0.0 2.0
Feb 2022 5 -0.1667 4.0
Mar 2022 2 -0.6 0.0
Apr 2022 3 0.5 0.0
May 2022 6 1.0 0.7143
Jun 2022 5 -0.25 0.125
Jul 2022 7 0.4444 0.8571
Aug 2022 6 -0.0769 1.0
Sep 2022 11 0.8333 2.6667
Oct 2022 10 -0.0909 1.8571
Nov 2022 7 -0.3 2.5
Dec 2022 7 0.0 0.1667
Jan 2023 5 -0.2857 -0.1667
Feb 2023 2 -0.6 -0.6
Mar 2023 5 1.25 1.25
Apr 2023 8 0.7778 1.6667
May 2023 7 -0.125 0.1667
Jun 2023 8 0.0714 0.6667
Jul 2023 7 -0.1333 0.0
Aug 2023 7 0.0769 0.1667
Sep 2023 7 -0.0714 -0.4091
Oct 2023 8 0.2308 -0.2
Nov 2023 6 -0.25 -0.1429
Dec 2023 6 -0.0833 -0.2143
Jan 2024 7 0.2727 0.4
Feb 2024 4 -0.4286 1.0
Mar 2024 2 -0.5 -0.5556
Apr 2024 2 0.0 -0.75
May 2024 3 0.5 -0.5714
Jun 2024 4 0.1667 -0.5333
Jul 2024 6 0.7143 -0.0769
Aug 2024 9 0.4167 0.2143
Sep 2024 7 -0.1765 0.0769
Oct 2024 9 0.2143 0.0625
Nov 2024 10 0.1176 0.5833
Dec 2024 6 -0.3684 0.0909
Jan 2025 6 0.0 -0.1429
Feb 2025 6 -0.0833 0.375
Mar 2025 5 -0.0909 1.5
Apr 2025 6 0.2 2.0
May 2025 6 0.0 1.0
Jun 2025 4 -0.3333 0.1429
Jul 2025 7 0.625 0.0833
Aug 2025 5 -0.3077 -0.4706
Sep 2025 5 0.1111 -0.2857
Oct 2025 5 -0.1 -0.4706
Nov 2025 5 0.1111 -0.4737
Dec 2025 5 0.0 -0.1667
Jan 2026 4 -0.2 -0.3333
Feb 2026 8 1.0 0.4545
Mar 2026 4 -0.5625 -0.3