1 Earhart Street

How does 1 Earhart Street compare with other multifamily housing buildings in Cambridge?

The latest disclosures cover 187 multifamily housing buildings in Cambridge, out of 902 buildings citywide. 1 Earhart Street's ENERGY STAR score of 67 compares with an average of 75 across the 155 that report a score; it scores higher than 30% of them and lower than 68%. Its site EUI of 55.0 kBtu/ft² is roughly in line with the average of 56.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 136,655 sq ft, it is roughly in line with the average floor area of 132,415 sq ft for those buildings. It was built in 2008, 35 years later 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 1 Earhart Street's energy performance changed over time?

BuildingCensus holds 10 Cambridge disclosures for 1 Earhart Street, covering report years 2015–2024. Its ENERGY STAR score went from 50 in 2015 to 67 in 2024 (+17 points); its best year on file was 2023, at 67. Site EUI moved from 63.8 kBtu/ft² (2015) to 55.0 kBtu/ft² (2024), a 14% decrease. Reported emissions went from 553 tCO₂e to 458 tCO₂e over the same span (down 17%).

What does an ENERGY STAR score of 67 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 67 means the building performs better than about 67% of its national peers. BuildingCensus bands the score into report-card grades; 67 falls in band C — below median (55–69). It sits 8 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. 1 Earhart Street's 55.0 kBtu/ft² across 136,655 sq ft works out to about 7.5 billion Btu (2,203 MWh-equivalent) in 2024. Its source EUI of 96.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 892,567 kWh of electricity, 44,745 therms of natural gas and 3,601 thousand gallons of water for the year.

Which law requires 1 Earhart Street to report its energy use?

1 Earhart 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:B1701:2024). 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).