At a glance
497-507 Massachusetts Ave is a 34,388-square-foot office building in Cambridge, Massachusetts, built in 1980. In its 2024 Cambridge benchmarking disclosure it reported an ENERGY STAR score of 12 out of 100 (grade D), a site energy-use intensity of 129.7 kBtu/ft² and 268 tCO₂e of greenhouse-gas emissions. That score is higher than 6% of the 94 scored office buildings in Cambridge.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 12 (band D) |
| Site EUI | 129.7 kBtu/ft² |
| Source EUI | 220.0 kBtu/ft² |
| GHG emissions | 268 tCO₂e |
| GHG intensity | — |
| Electricity | 482,639 kWh |
| Natural gas | 28,123 therms |
| Water use | 2,316 kgal |
| Gross floor area | 34,388 sq ft |
| Source record | cambridge:B1507:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 12 | +2 | 129.7 kBtu/ft² | 268 tCO₂e |
| 2023 | 10 | -1 | 127.4 kBtu/ft² | 268 tCO₂e |
| 2022 | 11 | -1 | 115.6 kBtu/ft² | 250 tCO₂e |
| 2021 | 12 | -18 | 118.6 kBtu/ft² | 252 tCO₂e |
| 2020 | 30 | -65 | 98.2 kBtu/ft² | 202 tCO₂e |
| 2019 | 95 | 22.2 kBtu/ft² | 50 tCO₂e |
Compliance context
BEUDO
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).
Ownership
GREENSAIL, LLC
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Location
- Address
- 497-507 Massachusetts Ave
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.36450, -71.10120
Within ~1 km
Nearby benchmarked buildings
- 250 Massachusetts Avenuescore —
Laboratory · 1,362,662 sq ft
- 250 Massachusetts Avenuescore —
Laboratory · 517,029 sq ft
- 70 PACIFIC STscore —
College/University · 362,687 sq ft
- 610 Main Streetscore —
Laboratory · 278,738 sq ft
- 45 Sidney Streetscore —
Laboratory · 277,000 sq ft
- 131 Washington Streetscore 68
Multifamily Housing · 275,666 sq ft
See also: most efficient in Cambridge · biggest emitters
How does 497-507 Massachusetts Ave compare with other office buildings in Cambridge?
The latest disclosures cover 117 office buildings in Cambridge, out of 902 buildings citywide. 497-507 Massachusetts Ave's ENERGY STAR score of 12 compares with an average of 64 across the 94 that report a score; it scores higher than 6% of them and lower than 93%. Its site EUI of 129.7 kBtu/ft² is about 65% above the average of 78.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 34,388 sq ft, it is about 72% below the average floor area of 121,167 sq ft for those buildings. It was built in 1980, 15 years later than the group's average year built (1965). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 497-507 Massachusetts Ave's energy performance changed over time?
BuildingCensus holds 6 Cambridge disclosures for 497-507 Massachusetts Ave, covering report years 2019–2024. Its ENERGY STAR score went from 95 in 2019 to 12 in 2024 (-83 points); its best year on file was 2019, at 95. Site EUI moved from 22.2 kBtu/ft² (2019) to 129.7 kBtu/ft² (2024), an 484% increase. Reported emissions went from 50 tCO₂e to 268 tCO₂e over the same span (up 434%).
What does an ENERGY STAR score of 12 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 12 means the building performs better than about 12% of its national peers. BuildingCensus bands the score into report-card grades; 12 falls in band D — lowest band (1–54). It sits 63 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. 497-507 Massachusetts Ave's 129.7 kBtu/ft² across 34,388 sq ft works out to about 4.5 billion Btu (1,307 MWh-equivalent) in 2024. Its source EUI of 220.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 482,639 kWh of electricity, 28,123 therms of natural gas and 2,316 thousand gallons of water for the year.
Which law requires 497-507 Massachusetts Ave to report its energy use?
497-507 Massachusetts Ave 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:B1507:2024). 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).
More office buildings in Cambridge
- 5 Western Avenue· 34,055 sq ft · score 98 (A)
- 344 Broadway· 33,909 sq ft · score 69 (C)
- 678 Massachusetts Avenue· 33,500 sq ft · score 58 (C)
- 51 Inman Street· 31,240 sq ft · score 86 (A)
- 288 Norfolk St· 30,930 sq ft · EUI 49.1 kBtu/ft²
- Two Brattle Square· 30,674 sq ft · score 89 (A)
- Office buildings in Cambridge· 117 benchmarked
- All Cambridge benchmarked buildings· BEUDO
- Most efficient large buildings in Cambridge
- Least efficient large buildings in Cambridge
- Biggest emitters in Cambridge
Frequently asked questions
What is 497-507 Massachusetts Ave's energy grade?
497-507 Massachusetts Ave scores 12 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 Cambridge disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 497-507 Massachusetts Ave use?
Its 2024 site energy-use intensity was 129.7 kBtu/ft² (220.0 kBtu/ft² source) across 34,388 sq ft, including 482,639 kWh of electricity and 28,123 therms of natural gas.
What are 497-507 Massachusetts Ave's carbon emissions?
497-507 Massachusetts Ave reported 268 tCO₂e of greenhouse-gas emissions for 2024.
Where is 497-507 Massachusetts Ave?
497-507 Massachusetts Ave is in Cambridge, Massachusetts. Its coordinates are 42.36450, -71.10120 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 497-507 Massachusetts Ave and when was it built?
497-507 Massachusetts Ave has 34,388 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1980 as its year built. It is classed as office.
Is 497-507 Massachusetts Ave covered by BEUDO?
Yes — it appears in the 2024 Building Energy Use Disclosure Ordinance (BEUDO) disclosure, which lists the buildings reporting under BEUDO.
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About this data
Source: Building Energy Use Disclosure Ordinance (BEUDO) (BEUDO), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “497-507 Massachusetts Ave, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/497-507-massachusetts-ave-af7262dd (data as of October 2, 2026).