MassPermits Research https://masspermits.com/research/ Original analysis of Massachusetts building-permit records. Every figure recomputed from the live data, with the method published alongside.en-us MassPermits (masspermits.com) — licensed CC BY-NC 4.0 hello@masspermits.com (MassPermits) https://www.rssboard.org/rss-specification MassPermits research_pages 1440 What 77 Massachusetts towns publish in their permit recordshttps://masspermits.com/research/coverageEvery one of the 77 Massachusetts municipal sources behind MassPermits, what each publishes, and what it does not - 52 publish no project value and 8 publish coordinates.Sun, 27 Sep 2026 09:00:00 +0000https://masspermits.com/research/coverage Methodology - how MassPermits measures Massachusetts permit datahttps://masspermits.com/research/methodologyHow MassPermits collects Massachusetts building-permit records, how work is classified, what is deliberately withheld, and the four rules every research page on this site follows.Sun, 27 Sep 2026 09:00:00 +0000https://masspermits.com/research/methodology Corrections and rejected analyseshttps://masspermits.com/research/correctionsCorrections and rejected analyses. Every figure MassPermits computed, verified and then declined to publish, with the reason it did not survive.Sun, 27 Sep 2026 09:00:00 +0000https://masspermits.com/research/corrections What permit follows what in Massachusetts, and how long afterhttps://masspermits.com/research/permit-sequenceAcross 14,271 Massachusetts addresses that filed more than one trade, 13 pairs of trades run reliably one way. A kitchen/bath permit is followed by gas 86% of the time, a median 21 days later.Thu, 20 Aug 2026 09:00:00 +0000https://masspermits.com/research/permit-sequence Friday is the quietest day in Massachusetts permit records - and in one town it does not existhttps://masspermits.com/research/friday-permit-gapAcross 80,002 Massachusetts building permits from 77 municipal sources, Friday accounts for 13.3% of dated records against roughly 22.8% on Tuesday. In Hingham it is zero.Tue, 18 Aug 2026 09:00:00 +0000https://masspermits.com/research/friday-permit-gap We found 345 accessory-dwelling-unit permits in Massachusetts records - and the apparent boom is not realhttps://masspermits.com/research/adu-permits345 ADU permits across 33 Massachusetts towns. Raw monthly counts climb from 4 to 66, but normalized against the same sources the rate is flat. 18.6% mention a garage.Tue, 18 Aug 2026 09:00:00 +0000https://masspermits.com/research/adu-permits