2, 4, 6 Arlington Street

How does 2, 4, 6 Arlington Street compare with other multifamily housing buildings in Cambridge?

The latest disclosures cover 187 multifamily housing buildings in Cambridge, out of 902 buildings citywide. 2, 4, 6 Arlington Street's ENERGY STAR score of 47 compares with an average of 75 across the 155 that report a score; it scores higher than 17% of them and lower than 82%. Its site EUI of 78.5 kBtu/ft² is about 38% above the average of 56.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group.

At 45,876 sq ft, it is about 65% below the average floor area of 132,415 sq ft for those buildings. It was built in 1904, 69 years earlier than the group's average year built (1973). 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 2, 4, 6 Arlington Street's energy performance changed over time?

BuildingCensus holds 10 Cambridge disclosures for 2, 4, 6 Arlington Street, covering report years 2015–2024. Its ENERGY STAR score went from 68 in 2015 to 47 in 2024 (-21 points); its best year on file was 2016, at 92. Site EUI moved from 94.3 kBtu/ft² (2015) to 78.5 kBtu/ft² (2024), a 17% decrease. Reported emissions went from 281 tCO₂e to 204 tCO₂e over the same span (down 28%).

What does an ENERGY STAR score of 47 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 47 means the building performs better than about 47% of its national peers. BuildingCensus bands the score into report-card grades; 47 falls in band D — lowest band (1–54). It sits 28 points below 75, the threshold for ENERGY STAR certification. In Cambridge, 50% 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. 2, 4, 6 Arlington Street's 78.5 kBtu/ft² across 45,876 sq ft works out to about 3.6 billion Btu (1,055 MWh-equivalent) in 2024. Its source EUI of 106.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 186,658 kWh of electricity, 29,663 therms of natural gas and 2,181 thousand gallons of water for the year.

Which law requires 2, 4, 6 Arlington Street to report its energy use?

2, 4, 6 Arlington Street reports under BEUDO, the legal basis of Cambridge's Building Energy Use Disclosure Ordinance (BEUDO), which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record cambridge:B1748:2024). Cambridge's 2023 BEUDO amendments require non-residential buildings of 100,000+ sq ft to reach net-zero emissions by 2035 (reductions starting 2026) and those of 25,000–100,000 sq ft by 2050 (starting 2030).