1820 Commonwealth Ave

How does 1820 Commonwealth 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. 1820 Commonwealth Ave's ENERGY STAR score of 42 compares with an average of 71 across the 1,225 that report a score; it scores higher than 16% of them and lower than 83%. Its site EUI of 117.5 kBtu/ft² is about 74% above the average of 67.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group.

At 27,000 sq ft, it is about half of 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 1820 Commonwealth Ave's energy performance changed over time?

BuildingCensus holds 3 Boston disclosures for 1820 Commonwealth Ave, covering report years 2022–2024. Its ENERGY STAR score went from 78 in 2022 to 42 in 2024 (-36 points); its best year on file was 2023, at 80. Site EUI moved from 85.2 kBtu/ft² (2022) to 117.5 kBtu/ft² (2024), an 38% increase. Reported emissions went from 131 tCO₂e to 170 tCO₂e over the same span (up 29%).

What does an ENERGY STAR score of 42 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 42 means the building performs better than about 42% of its national peers. BuildingCensus bands the score into report-card grades; 42 falls in band D — lowest band (1–54). It sits 33 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. 1820 Commonwealth Ave's 117.5 kBtu/ft² across 27,000 sq ft works out to about 3.2 billion Btu (930 MWh-equivalent) in 2024. The disclosure also reports 82,436 kWh of electricity and 28,914 therms of natural gas for the year.

Which law requires 1820 Commonwealth Ave to report its energy use?

1820 Commonwealth 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:102435:2024). 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.