Zip Code: 18104 (Allentown, PA) - 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 18104 Zip Code in February 2026 was 95.646.

You can see similar for other Pennsylvania Zip Codes.

The chart and table below shows the trend of the market hotness: supply score for the 18104 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: 18104 - Market Hotness: Trend of Supply Score
Zip Code: 18104 - Market Hotness: Trend of Supply Score
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Month Supply Score
September 2017 74.11433926897844
October 2017 77.55178204888972
November 2017 72.2790404040404
December 2017 54.97774049938706
January 2018 47.10246641267295
February 2018 34.86595360466732
March 2018 42.48930049814074
April 2018 72.41498718747835
May 2018 74.14710698689956
June 2018 67.08768197832879
July 2018 62.56214889907664
August 2018 89.78027593254983
September 2018 74.12503170174993
October 2018 61.87154348919055
November 2018 51.83169882948434
December 2018 73.0017990233873
January 2019 73.17957166392091
February 2019 63.450312478538564
March 2019 68.7080013855213
April 2019 61.96516730663741
May 2019 76.29141798724018
June 2019 74.49068782357293
July 2019 77.22953934866653
August 2019 69.04761904761905
September 2019 64.5071875201444
October 2019 76.3426284533953
November 2019 81.07017315453717
December 2019 77.85159104497443
January 2020 68.86423887261057
February 2020 85.37315612677084
March 2020 84.72968002942258
April 2020 94.8493394686062
May 2020 62.86204837264855
June 2020 46.89401337038984
July 2020 98.43012914701106
August 2020 86.44904458598725
September 2020 94.64504034558644
October 2020 72.7234613449606
November 2020 91.83690626313577
December 2020 97.9280550167519
January 2021 86.76678945877019
February 2021 65.83530866742244
March 2021 62.653898768809846
April 2021 97.86961583236321
May 2021 95.34642032332563
June 2021 95.46992686387948
July 2021 94.59977793479358
August 2021 91.12426035502959
September 2021 58.7892580791989
October 2021 93.24738550306527
November 2021 97.68013100436681
December 2021 98.8556338028169
January 2022 98.04029505669934
February 2022 96.83804307232666
March 2022 98.12734082397003
April 2022 96.51072628586198
May 2022 97.10908239700375
June 2022 97.848127457066
July 2022 97.33259238677411
August 2022 96.94095531060411
September 2022 98.06087176460669
October 2022 91.52069053059152
November 2022 97.54432697910596
December 2022 98.0983105526785
January 2023 69.56947162426614
February 2023 87.50119812134572
March 2023 97.13024282560706
April 2023 88.9367816091954
May 2023 99.47480052519947
June 2023 99.39895556212434
July 2023 99.02839354777852
August 2023 98.84890782198858
September 2023 99.00594656962812
October 2023 98.07675869732456
November 2023 87.95027904616946
December 2023 89.75312817044302
January 2024 96.49510020305465
February 2024 95.81343073897162
March 2024 95.30041073646002
April 2024 91.43921751280857
May 2024 99.51157742402316
June 2024 98.98981177689518
July 2024 89.3839565145775
August 2024 93.15607679331673
September 2024 97.59506519871945
October 2024 95.19784863618901
November 2024 96.68864019622873
December 2024 89.15003467673577
January 2025 73.29172141918528
February 2025 84.01959941545603
March 2025 92.81090877707776
April 2025 98.62979152656355
May 2025 98.70478983382209
June 2025 99.2102206736353
July 2025 99.27841250751653
August 2025 99.57852706299911
September 2025 99.78947368421053
October 2025 95.84086799276673
November 2025 96.10003624501631
December 2025 83.08245833027388
January 2026 97.73696039680695
February 2026 96.95451975119154
March 2026 95.64610202908075