237 Franklin St / 340 Green St

How does 237 Franklin St / 340 Green St compare with other multifamily housing buildings in Cambridge?

The latest disclosures cover 187 multifamily housing buildings in Cambridge, out of 902 buildings citywide. 237 Franklin St / 340 Green St's ENERGY STAR score of 78 compares with an average of 75 across the 155 that report a score; it scores higher than 41% of them and lower than 56%. Its site EUI of 67.2 kBtu/ft² is about 18% above the average of 56.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group.

At 160,580 sq ft, it is about 21% above the average floor area of 132,415 sq ft for those buildings. Its 1976 construction date is close to 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 237 Franklin St / 340 Green St's energy performance changed over time?

BuildingCensus holds 10 Cambridge disclosures for 237 Franklin St / 340 Green St, covering report years 2015–2024. Its ENERGY STAR score went from 6 in 2015 to 78 in 2024 (+72 points); its best year on file was 2017, at 97. Site EUI moved from 67.4 kBtu/ft² (2015) to 67.2 kBtu/ft² (2024), a 0% decrease. Reported emissions went from 830 tCO₂e to 626 tCO₂e over the same span (down 25%).

What does an ENERGY STAR score of 78 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 78 means the building performs better than about 78% of its national peers. BuildingCensus bands the score into report-card grades; 78 falls in band B — above median (70–84). 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 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. 237 Franklin St / 340 Green St's 67.2 kBtu/ft² across 160,580 sq ft works out to about 10.8 billion Btu (3,163 MWh-equivalent) in 2024. Its source EUI of 100.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 806,923 kWh of electricity, 80,366 therms of natural gas and 4,987 thousand gallons of water for the year.

Which law requires 237 Franklin St / 340 Green St to report its energy use?

237 Franklin St / 340 Green St 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:B1724:2024). 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).