50 Milk St

How does 50 Milk St compare with other office buildings in Boston?

The latest disclosures cover 467 office buildings in Boston, out of 6,305 buildings citywide. 50 Milk St's ENERGY STAR score of 78 compares with an average of 71 across the 356 that report a score; it scores higher than 52% of them and lower than 45%. Its site EUI of 64.9 kBtu/ft² is roughly in line with the average of 61.7 kBtu/ft².

At 278,290 sq ft, it is about 45% above 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 50 Milk St's energy performance changed over time?

BuildingCensus holds 3 Boston disclosures for 50 Milk St, covering report years 2022–2024. Its ENERGY STAR score went from 85 in 2022 to 78 in 2024 (-7 points); its best year on file was 2022, at 85. Site EUI moved from 57.0 kBtu/ft² (2022) to 64.9 kBtu/ft² (2024), an 14% increase. Reported emissions went from 1,409 tCO₂e to 1,029 tCO₂e over the same span (down 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. 50 Milk St's 64.9 kBtu/ft² across 278,290 sq ft works out to about 18.1 billion Btu (5,293 MWh-equivalent) in 2024. The disclosure also reports 5,289,828 kWh of electricity for the year.

Which law requires 50 Milk St to report its energy use?

50 Milk 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:105156:2024). 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.