Zip Code: 01821 (Billerica, MA) - 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 01821 Zip Code in January 2026 was 94.604.
You can see similar for other Massachusetts Zip Codes.
The chart and table below shows the trend of the market hotness: supply score for the 01821 zip code.
Note: Supply Score is an index representing the metro's median days on market ranking compared to other metros.
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Related Topics: Zip Code: 01821 - Realtor House Inventory Topic List
Data Source: Realtor.
Zip Code: 01821 - Market Hotness: Trend of Supply Score
Zip Code: 01821 - Market Hotness: Trend of Supply Score
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| Month | Supply Score |
|---|---|
| September 2017 | 95.13901905654483 |
| October 2017 | 81.66324563040368 |
| November 2017 | 94.41919191919192 |
| December 2017 | 97.96761081360088 |
| January 2018 | 95.18080342223114 |
| February 2018 | 86.60925128490068 |
| March 2018 | 50.79632358100049 |
| April 2018 | 34.14363875614655 |
| May 2018 | 99.0242903930131 |
| June 2018 | 98.55082097985775 |
| July 2018 | 97.73358300510105 |
| August 2018 | 93.03781297904956 |
| September 2018 | 91.33908191732183 |
| October 2018 | 83.30819507290096 |
| November 2018 | 87.64315090161341 |
| December 2018 | 97.73837059881778 |
| January 2019 | 91.72322899505765 |
| February 2019 | 71.69150470434722 |
| March 2019 | 74.4579147904399 |
| April 2019 | 85.66236972024136 |
| May 2019 | 88.85230157096797 |
| June 2019 | 89.19518590734889 |
| July 2019 | 95.68180328943058 |
| August 2019 | 92.36273744470466 |
| September 2019 | 93.75362599110424 |
| October 2019 | 93.12548412083656 |
| November 2019 | 92.01926832443692 |
| December 2019 | 95.55570318208994 |
| March 2020 | 99.85288709084223 |
| April 2020 | 98.28558705655335 |
| May 2020 | 95.80471782621677 |
| June 2020 | 90.64072710884098 |
| July 2020 | 81.97355192947181 |
| August 2020 | 89.18789808917198 |
| September 2020 | 98.08460347216563 |
| October 2020 | 96.05903068925038 |
| November 2020 | 94.41782261454392 |
| December 2020 | 99.71786281079174 |
| January 2021 | 97.90308869368093 |
| February 2021 | 99.73204163660724 |
| July 2021 | 96.83052387200969 |
| August 2021 | 97.9900441438903 |
| September 2021 | 97.39644970414201 |
| October 2021 | 99.35989902632528 |
| November 2021 | 93.34970887918487 |
| December 2021 | 99.92175273865415 |
| May 2022 | 98.61891385767791 |
| June 2022 | 99.54479619284089 |
| July 2022 | 96.19338705195888 |
| August 2022 | 86.45646415449029 |
| September 2022 | 92.2013320967878 |
| October 2022 | 92.93390877549294 |
| November 2022 | 94.69741113793391 |
| December 2022 | 97.78419220646914 |
| January 2023 | 90.31311154598825 |
| July 2023 | 99.87737005942836 |
| November 2023 | 99.89852866565195 |
| December 2023 | 96.81264795400743 |
| July 2024 | 99.98352824905288 |
| September 2024 | 99.99219177012571 |
| October 2024 | 96.40414905877833 |
| November 2024 | 97.7311053196382 |
| December 2024 | 94.52878169068352 |
| January 2025 | 97.3718791064389 |
| February 2025 | 99.83667153786642 |
| April 2025 | 96.79724277067922 |
| May 2025 | 99.34017595307918 |
| June 2025 | 98.12620983352691 |
| July 2025 | 74.165664461816 |
| August 2025 | 93.55959775214434 |
| September 2025 | 97.83666061705989 |
| October 2025 | 98.83544303797468 |
| November 2025 | 89.42370424066691 |
| December 2025 | 95.55767677509361 |
| January 2026 | 98.33372084011471 |
| February 2026 | 94.60376443977704 |
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