References 483% CONFIDENCEOverall confidence: 83%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]75%boston.gov/sites/default/files/file/2023/12/BERDO%202.0%20Final%20Amended%20Docket%200775_1.pdfboston.gov· Posted Sep 24, 2026· Starts Jan 1, 2030 ✓· Ends Dec 31, 2034 ✓· 25% of score
Set in law, per the BERDO ordinance: Table 1's "2030-2034" emissions standards, and mid-size buildings "shall not be subject to the Emissions standards until 2031, reporting for 2030 emissions"; the period ends where the 2035-2039 standards begin.
- [2]90%Building Emissions Reduction and Disclosure (BERDO)boston.gov· Added Sep 24, 2026· 25% of score
The City's BERDO page: 2025 or 2030 compliance starts by size, 15 May reporting, third-party verification in 2026 or 2031, 5% of buildings making nearly 40% of emissions.[1]
- [3]88%How to comply with your BERDO emissions standardboston.gov· Added Sep 24, 2026· 25% of score
City quick guide: 35+ units / 35,000 ft2+ start emissions compliance in 2025; 15-34 units / 20,000-34,999 ft2 in 2030; standards decrease every five years to net zero by 2050.[1]
- [4]80%
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