5 Major Michael J O'Connor Way

How does 5 Major Michael J O'Connor Way compare with other multifamily housing buildings in Boston?

The latest disclosures cover 2,174 multifamily housing buildings in Boston, out of 6,305 buildings citywide. 5 Major Michael J O'Connor Way's ENERGY STAR score of 78 compares with an average of 71 across the 1,225 that report a score; it scores higher than 46% of them and lower than 52%. Its site EUI of 51.8 kBtu/ft² is about 23% below the average of 67.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 40,818 sq ft, it is about 30% below the average floor area of 58,087 sq ft for those buildings. Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².

How has 5 Major Michael J O'Connor Way's energy performance changed over time?

BuildingCensus holds 3 Boston disclosures for 5 Major Michael J O'Connor Way, covering report years 2022–2024. Its ENERGY STAR score went from 93 in 2023 to 78 in 2024 (-15 points); its best year on file was 2023, at 93. Site EUI moved from 37.6 kBtu/ft² (2023) to 51.8 kBtu/ft² (2024), an 38% increase. Reported emissions went from 86 tCO₂e to 110 tCO₂e over the same span (up 27%).

What does an ENERGY STAR score of 78 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 78 means the building performs better than about 78% of its national peers. BuildingCensus bands the score into report-card grades; 78 falls in band B — above median (70–84). 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. 5 Major Michael J O'Connor Way's 51.8 kBtu/ft² across 40,818 sq ft works out to about 2.1 billion Btu (620 MWh-equivalent) in 2024. The disclosure also reports 180,100 kWh of electricity and 14,059 therms of natural gas for the year.

Which law requires 5 Major Michael J O'Connor Way to report its energy use?

5 Major Michael J O'Connor Way 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:104805:2024). 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.