43 Bow St

How does 43 Bow St compare with other office buildings in Boston?

The latest disclosures cover 467 office buildings in Boston, out of 6,305 buildings citywide. 43 Bow St's ENERGY STAR score of 65 compares with an average of 71 across the 356 that report a score; it scores higher than 30% of them and lower than 68%. Its site EUI of 53.6 kBtu/ft² is about 13% below the average of 61.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 4,000 sq ft, it is about 98% 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 43 Bow St's energy performance changed over time?

BuildingCensus holds 3 Boston disclosures for 43 Bow St, covering report years 2022–2024. Its ENERGY STAR score went from 24 in 2023 to 65 in 2024 (+41 points). Site EUI moved from 82.3 kBtu/ft² (2022) to 53.6 kBtu/ft² (2024), a 35% decrease. Reported emissions went from 19 tCO₂e to 12 tCO₂e over the same span (down 37%).

What does an ENERGY STAR score of 65 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 65 means the building performs better than about 65% of its national peers. BuildingCensus bands the score into report-card grades; 65 falls in band C — below median (55–69). It sits 10 points below 75, the threshold for ENERGY STAR certification. 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. 43 Bow St's 53.6 kBtu/ft² across 4,000 sq ft works out to about 0.2 billion Btu (63 MWh-equivalent) in 2024. The disclosure also reports 37,119 kWh of electricity and 876 therms of natural gas for the year.

Which law requires 43 Bow St to report its energy use?

43 Bow 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:101156:2024). 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.