6 Cambridge Center

How does 6 Cambridge Center compare with other hotel buildings in Cambridge?

The latest disclosures cover 19 hotel buildings in Cambridge, out of 902 buildings citywide. 6 Cambridge Center's ENERGY STAR score of 66 compares with an average of 55 across the 18 that report a score; it scores higher than 50% of them and lower than 44%. Its site EUI of 90.6 kBtu/ft² is roughly in line with the average of 98.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 181,700 sq ft, it is about 24% above the average floor area of 146,134 sq ft for those buildings. It was built in 1997, 8 years later than the group's average year built (1990). Across all 24 jurisdictions BuildingCensus covers, the 3,812 hotel buildings average an ENERGY STAR score of 65 and a site EUI of 77.8 kBtu/ft².

How has 6 Cambridge Center's energy performance changed over time?

BuildingCensus holds 10 Cambridge disclosures for 6 Cambridge Center, covering report years 2015–2024. Its ENERGY STAR score went from 54 in 2015 to 66 in 2024 (+12 points); its best year on file was 2021, at 93. Site EUI moved from 92.8 kBtu/ft² (2015) to 90.6 kBtu/ft² (2024), a 2% decrease. Reported emissions went from 1,100 tCO₂e to 991 tCO₂e over the same span (down 10%).

What does an ENERGY STAR score of 66 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 66 means the building performs better than about 66% of its national peers. BuildingCensus bands the score into report-card grades; 66 falls in band C — below median (55–69). It sits 9 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. 6 Cambridge Center's 90.6 kBtu/ft² across 181,700 sq ft works out to about 16.5 billion Btu (4,825 MWh-equivalent) in 2024. Its source EUI of 153.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,785,114 kWh of electricity, 103,800 therms of natural gas and 8,458 thousand gallons of water for the year.

Which law requires 6 Cambridge Center to report its energy use?

6 Cambridge Center 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:B1437:2024). 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).