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Middlesex County, MA

Name: Building Permits — Middlesex County, MA
License: https://creativecommons.org/publicdomain/zero/1.0/

Residential building permits · 2015–2025

Housing units authorized (2025): 2,341
Construction valuation (2025): $890,561,204
By structure type (2025): 1-unit 862 · 2-unit 82 · 3-4 25 · 5+ 1,372

Units authorized by year

Year	Units	Valuation
2025	2,341	$890,561,204
2024	3,495	$1,242,608,491
2023	3,894	$1,175,190,852
2022	3,257	$878,506,294
2021	4,671	$855,370,123
2020	4,443	$820,959,164
2019	5,569	$896,546,800
2018	4,309	$897,560,847
2017	3,682	$835,505,183
2016	4,336	$901,933,982
2015	4,645	$935,385,082

The Census Building Permits Survey counts new privately-owned housing units authorized by building permits — a leading indicator of housing supply. "1-unit" is single-family; "5+ units" is larger multifamily. Figures are imputation-adjusted to cover permit offices that did not report.

Source: Census Building Permits Survey. License: CC0 1.0.