Zip Code: 01821 (Billerica, MA) - Market Hotness: Trend of Hotness Score (Realtor)
Updated on March 13, 2026.

According to data from Realtor.com, the market hotness: hotness score for the 01821 Zip Code in January 2026 was 96.308.

You can see similar for other Massachusetts Zip Codes.

The chart and table below shows the trend of the market hotness: hotness score for the 01821 zip code.

Note: Hotness Score is an equally-weighted composite metric of a geography’s supply score and demand score.

Data Source: Realtor.
Zip Code: 01821 - Market Hotness: Trend of Hotness Score
Zip Code: 01821 - Market Hotness: Trend of Hotness Score
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Month Hotness Score
September 2017 96.81037175882537
October 2017 89.98880388132113
November 2017 96.58459595959596
December 2017 98.48377314665463
January 2018 96.96544348639797
February 2018 92.67259341575219
March 2018 74.66147477723987
April 2018 66.64935244823049
May 2018 99.0242903930131
June 2018 98.96297281127434
July 2018 97.67224123458385
August 2018 94.81029637199796
September 2018 93.93228506213543
October 2018 90.11123680241327
November 2018 91.1863334387852
December 2018 95.94255975327678
January 2019 92.61943986820428
February 2019 84.3760730719044
March 2019 85.22687911326636
April 2019 91.08612177729017
May 2019 93.11586746244083
June 2019 93.23270355678073
July 2019 96.76299062970972
August 2019 95.13075722092115
September 2019 95.33294656094888
October 2019 94.87477407694294
November 2019 95.04296315583909
December 2019 97.4622998737793
March 2020 99.81610886355278
April 2020 98.0889119786255
May 2020 96.06225739026574
June 2020 93.46878990460452
July 2020 89.5213053901477
August 2020 93.88933121019109
September 2020 98.31282093080121
October 2020 95.9290625524065
November 2020 95.98150483396384
December 2020 98.80973373302768
January 2021 98.52177198450931
February 2021 99.75265381840669
July 2021 94.04461491874432
August 2021 91.91791114868039
September 2021 94.55621301775147
October 2021 96.54706094482509
November 2021 93.26783114992722
December 2021 96.43485915492957
May 2022 98.54283707865169
June 2022 98.70680736602525
July 2022 88.22358062424748
August 2022 87.58438007348542
September 2022 90.83551133968469
October 2022 90.56020986714057
November 2022 93.28227753267294
December 2022 94.685457169539
January 2023 93.88898772460416
July 2023 98.98122818602019
November 2023 99.05293421275157
December 2023 97.23960094690565
July 2024 99.11876132432877
September 2024 99.62130085109706
October 2024 96.89973107952363
November 2024 96.35520466043232
December 2024 95.10287431609771
January 2025 97.95088699080158
February 2025 99.6776411931574
April 2025 97.70931405514459
May 2025 99.36461388074292
June 2025 97.95586527293844
July 2025 83.56885147324112
August 2025 94.07719609582963
September 2025 96.51905626134301
October 2025 96.82097649186257
November 2025 91.28669807901414
December 2025 96.40575666348484
January 2026 98.35697124699684
February 2026 96.30826399547621