1 Liberty Sq

How does 1 Liberty Sq compare with other office buildings in Boston?

The latest disclosures cover 467 office buildings in Boston, out of 6,305 buildings citywide. 1 Liberty Sq's ENERGY STAR score of 85 compares with an average of 71 across the 356 that report a score; it scores higher than 74% of them and lower than 26%. Its site EUI of 31.6 kBtu/ft² is about half of the average of 61.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 173,600 sq ft, it is roughly in line with 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 1 Liberty Sq's energy performance changed over time?

BuildingCensus holds 3 Boston disclosures for 1 Liberty Sq, covering report years 2022–2024. Its ENERGY STAR score went from 84 in 2022 to 85 in 2024 (+1 points); its best year on file was 2023, at 86. Site EUI moved from 33.5 kBtu/ft² (2022) to 31.6 kBtu/ft² (2024), a 6% decrease. Reported emissions went from 459 tCO₂e to 313 tCO₂e over the same span (down 32%).

What does an ENERGY STAR score of 85 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 85 means the building performs better than about 85% of its national peers. BuildingCensus bands the score into report-card grades; 85 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. 1 Liberty Sq's 31.6 kBtu/ft² across 173,600 sq ft works out to about 5.5 billion Btu (1,608 MWh-equivalent) in 2024. The disclosure also reports 1,606,900 kWh of electricity for the year.

Which law requires 1 Liberty Sq to report its energy use?

1 Liberty Sq 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:102311:2024). 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.