64 Hemenway St

How does 64 Hemenway St 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. 64 Hemenway St's ENERGY STAR score of 93 compares with an average of 71 across the 1,225 that report a score; it scores higher than 72% of them and lower than 25%. Its site EUI of 78.2 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 16,384 sq ft, it is about 72% 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 64 Hemenway St's energy performance changed over time?

BuildingCensus holds 3 Boston disclosures for 64 Hemenway St, covering report years 2022–2024. Its ENERGY STAR score went from 88 in 2022 to 93 in 2024 (+5 points). Site EUI moved from 85.3 kBtu/ft² (2022) to 78.2 kBtu/ft² (2024), a 8% decrease. Reported emissions went from 81 tCO₂e to 69 tCO₂e over the same span (down 15%).

What does an ENERGY STAR score of 93 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 93 means the building performs better than about 93% of its national peers. BuildingCensus bands the score into report-card grades; 93 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. 64 Hemenway St's 78.2 kBtu/ft² across 16,384 sq ft works out to about 1.3 billion Btu (375 MWh-equivalent) in 2024. The disclosure also reports 60,489 kWh of electricity and 10,748 therms of natural gas for the year.

Which law requires 64 Hemenway St to report its energy use?

64 Hemenway 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:103631:2024). 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.