Zip Code: 21770 (Monrovia, 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 21770 Zip Code in February 2026 was 9. The month over month percentage change (MoM) was -0.15%, and the year over year percentage change (YoY) was 0.5455%.

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

The chart below shows the trend of active listing count in the 21770 zip code. The table below shows the trend, and the MoM and YoY percentage changes.

Data Source: Realtor.
Zip Code: 21770 - Trend of Active Listing Count of Houses
Zip Code: 21770 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 38
Sep 2016 32
Oct 2016 31
Nov 2016 43
Dec 2016 45
Jan 2017 43
Feb 2017 39
Mar 2017 39
Apr 2017 36
May 2017 43
Jun 2017 44
Jul 2017 41
Aug 2017 43 0.0617 0.1316
Sep 2017 40 -0.0814 0.2344
Oct 2017 33 -0.1646 0.0645
Nov 2017 38 0.1515 -0.1163
Dec 2017 41 0.0789 -0.0889
Jan 2018 38 -0.0732 -0.1163
Feb 2018 40 0.0526 0.039
Mar 2018 36 -0.1125 -0.0897
Apr 2018 36 0.0141 0.0
May 2018 34 -0.0694 -0.2209
Jun 2018 40 0.194 -0.0909
Jul 2018 39 -0.025 -0.037
Aug 2018 36 -0.0897 -0.1744
Sep 2018 34 -0.0563 -0.1519
Oct 2018 41 0.2239 0.2424
Nov 2018 48 0.1707 0.2632
Dec 2018 44 -0.0938 0.061
Jan 2019 38 -0.1264 0.0
Feb 2019 33 -0.1447 -0.1875
Mar 2019 32 -0.0308 -0.1127
Apr 2019 25 -0.2063 -0.3056
May 2019 24 -0.06 -0.2985
Jun 2019 28 0.1702 -0.3125
Jul 2019 26 -0.0545 -0.3333
Aug 2019 26 -0.0192 -0.2817
Sep 2019 28 0.098 -0.1642
Oct 2019 31 0.0893 -0.2561
Nov 2019 32 0.0492 -0.3333
Dec 2019 24 -0.25 -0.4483
Jan 2020 19 -0.2083 -0.5
Feb 2020 17 -0.1053 -0.4769
Mar 2020 18 0.0588 -0.4286
Apr 2020 18 0.0 -0.28
May 2020 18 -0.0278 -0.2553
Jun 2020 14 -0.2 -0.4909
Jul 2020 6 -0.5714 -0.7692
Aug 2020 8 0.3333 -0.6863
Sep 2020 9 0.125 -0.6786
Oct 2020 7 -0.2222 -0.7705
Nov 2020 8 0.1429 -0.75
Dec 2020 9 0.0625 -0.6458
Jan 2021 6 -0.2941 -0.6842
Feb 2021 4 -0.3333 -0.7647
Mar 2021 3 -0.375 -0.8611
Apr 2021 3 0.2 -0.8333
May 2021 4 0.3333 -0.7714
Jun 2021 5 0.25 -0.6429
Jul 2021 3 -0.4 -0.5
Aug 2021 4 0.3333 -0.5
Sep 2021 10 1.375 0.0556
Oct 2021 6 -0.3684 -0.1429
Nov 2021 13 1.1667 0.625
Dec 2021 6 -0.5769 -0.3529
Jan 2022 3 -0.4545 -0.5
Feb 2022 5 0.6667 0.25
Mar 2022 3 -0.4 0.2
Apr 2022 6 0.8333 0.8333
May 2022 4 -0.2727 0.0
Jun 2022 8 0.875 0.5
Jul 2022 8 0.0 1.5
Aug 2022 8 0.0667 1.0
Sep 2022 7 -0.125 -0.2632
Oct 2022 7 -0.0714 0.0833
Nov 2022 10 0.5385 -0.2308
Dec 2022 12 0.15 1.0909
Jan 2023 9 -0.2174 2.0
Feb 2023 7 -0.2222 0.4
Mar 2023 7 0.0 1.3333
Apr 2023 10 0.3571 0.7273
May 2023 10 0.0526 1.5
Jun 2023 10 -0.05 0.2667
Jul 2023 9 -0.0526 0.2
Aug 2023 9 0.0 0.125
Sep 2023 8 -0.1111 0.1429
Oct 2023 9 0.125 0.3846
Nov 2023 8 -0.1667 -0.25
Dec 2023 6 -0.2667 -0.5217
Jan 2024 2 -0.6364 -0.7778
Feb 2024 3 0.25 -0.6429
Mar 2024 4 0.6 -0.4286
Apr 2024 6 0.5 -0.3684
May 2024 6 0.0 -0.4
Jun 2024 4 -0.3333 -0.5789
Jul 2024 6 0.5 -0.3333
Aug 2024 4 -0.3333 -0.5556
Sep 2024 5 0.25 -0.375
Oct 2024 5 0.0 -0.4444
Nov 2024 7 0.3 -0.1333
Dec 2024 8 0.2308 0.4545
Jan 2025 7 -0.125 2.5
Feb 2025 7 -0.0714 1.6
Mar 2025 6 -0.1538 0.375
Apr 2025 8 0.4545 0.3333
May 2025 10 0.1875 0.5833
Jun 2025 14 0.4737 2.5
Jul 2025 19 0.3571 2.1667
Aug 2025 17 -0.1053 3.25
Sep 2025 16 -0.0588 2.2
Oct 2025 16 -0.0313 2.1
Nov 2025 18 0.1613 1.7692
Dec 2025 15 -0.1667 0.875
Jan 2026 12 -0.2 0.7143
Feb 2026 10 -0.1667 0.5385
Mar 2026 9 -0.15 0.5455