40 Market St

How does 40 Market St compare with other multifamily housing buildings in Cambridge?

The latest disclosures cover 187 multifamily housing buildings in Cambridge, out of 902 buildings citywide. 40 Market St's ENERGY STAR score of 95 compares with an average of 75 across the 155 that report a score; it scores higher than 73% of them and lower than 26%. Its site EUI of 47.9 kBtu/ft² is about 16% below the average of 56.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 81,034 sq ft, it is about 39% below the average floor area of 132,415 sq ft for those buildings. It was built in 1910, 63 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 40 Market St's energy performance changed over time?

BuildingCensus holds 5 Cambridge disclosures for 40 Market St, covering report years 2020–2024. Its ENERGY STAR score went from 94 in 2020 to 95 in 2024 (+1 points); its best year on file was 2022, at 100. Site EUI moved from 49.5 kBtu/ft² (2020) to 47.9 kBtu/ft² (2024), a 3% decrease. Reported emissions went from 231 tCO₂e to 225 tCO₂e over the same span (down 3%).

What does an ENERGY STAR score of 95 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 95 means the building performs better than about 95% of its national peers. BuildingCensus bands the score into report-card grades; 95 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 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. 40 Market St's 47.9 kBtu/ft² across 81,034 sq ft works out to about 3.9 billion Btu (1,138 MWh-equivalent) in 2024. Its source EUI of 71.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 286,953 kWh of electricity, 28,998 therms of natural gas and 4,286 thousand gallons of water for the year.

Which law requires 40 Market St to report its energy use?

40 Market 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:B1313:2024). 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).