351 Massachusetts Ave

How does 351 Massachusetts Ave 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. 351 Massachusetts Ave's ENERGY STAR score of 65 compares with an average of 71 across the 1,225 that report a score; it scores higher than 33% of them and lower than 66%. Its site EUI of 78.5 kBtu/ft² is about 16% above the average of 67.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group.

At 57,750 sq ft, it is roughly in line with 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 351 Massachusetts Ave's energy performance changed over time?

BuildingCensus holds 3 Boston disclosures for 351 Massachusetts Ave, covering report years 2022–2024. Its ENERGY STAR score went from 57 in 2022 to 65 in 2024 (+8 points). Site EUI moved from 80.4 kBtu/ft² (2022) to 78.5 kBtu/ft² (2024), a 2% decrease. Reported emissions went from 282 tCO₂e to 245 tCO₂e over the same span (down 13%).

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. 351 Massachusetts Ave's 78.5 kBtu/ft² across 57,750 sq ft works out to about 4.5 billion Btu (1,329 MWh-equivalent) in 2024. The disclosure also reports 311,453 kWh of electricity and 34,731 therms of natural gas for the year.

Which law requires 351 Massachusetts Ave to report its energy use?

351 Massachusetts Ave 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:104150:2024). 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.