9-11 Beacon St

How does 9-11 Beacon St compare with other office buildings in Boston?

The latest disclosures cover 467 office buildings in Boston, out of 6,305 buildings citywide. 9-11 Beacon St's ENERGY STAR score of 86 compares with an average of 71 across the 356 that report a score; it scores higher than 74% of them and lower than 24%. Its site EUI of 52.5 kBtu/ft² is about 15% below the average of 61.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 151,959 sq ft, it is about 21% below the average floor area of 191,803 sq ft for those buildings. Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².

How has 9-11 Beacon St's energy performance changed over time?

BuildingCensus holds 3 Boston disclosures for 9-11 Beacon St, covering report years 2022–2024. Its ENERGY STAR score went from 87 in 2022 to 86 in 2024 (-1 points); its best year on file was 2022, at 87. Site EUI moved from 55.6 kBtu/ft² (2022) to 52.5 kBtu/ft² (2024), a 6% decrease. Reported emissions went from 517 tCO₂e to 434 tCO₂e over the same span (down 16%).

What does an ENERGY STAR score of 86 mean?

ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 86 means the building performs better than about 86% of its national peers. BuildingCensus bands the score into report-card grades; 86 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In Boston, 52% of scored buildings are at 75 or above.

Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. 9-11 Beacon St's 52.5 kBtu/ft² across 151,959 sq ft works out to about 8 billion Btu (2,338 MWh-equivalent) in 2024. The disclosure also reports 775,980 kWh of electricity and 53,347 therms of natural gas for the year.

Which law requires 9-11 Beacon St to report its energy use?

9-11 Beacon St reports under BERDO 2.0, the legal basis of Boston's Building Emissions Reduction and Disclosure Ordinance, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record boston:105712:2024). BERDO 2.0 sets emissions standards for buildings of 20,000+ sq ft or 15+ units, starting in 2025 or 2030 depending on building size, with an alternative-compliance payment of $234 per metric ton of CO₂e over the limit.