At a glance
145 Broadway is a 490,000-square-foot office building in Cambridge, Massachusetts, built in 2019. In its 2024 Cambridge benchmarking disclosure it reported an ENERGY STAR score of 91 out of 100 (grade A), a site energy-use intensity of 57.3 kBtu/ft² and 1,832 tCO₂e of greenhouse-gas emissions. That score is higher than 91% of the 94 scored office buildings in Cambridge.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 91 (band A) |
| Site EUI | 57.3 kBtu/ft² |
| Source EUI | 128.0 kBtu/ft² |
| GHG emissions | 1,832 tCO₂e |
| GHG intensity | — |
| Electricity | 5,571,359 kWh |
| Natural gas | 86,448 therms |
| Water use | 2,774 kgal |
| Gross floor area | 490,000 sq ft |
| Source record | cambridge:B1062:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 91 | -5 | 57.3 kBtu/ft² | 1,832 tCO₂e |
| 2023 | 96 | -1 | 48.0 kBtu/ft² | 1,526 tCO₂e |
| 2022 | 97 | ±0 | 43.4 kBtu/ft² | 1,398 tCO₂e |
| 2021 | 97 | +2 | 43.4 kBtu/ft² | 1,405 tCO₂e |
| 2020 | 95 | 43.1 kBtu/ft² | 1,369 tCO₂e | |
| 2019 | — | — | 0 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
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 145 Broadway
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.36490, -71.08880
Within ~1 km
Nearby benchmarked buildings
- 250 Massachusetts Avenuescore —
Laboratory · 1,362,662 sq ft
- 325 Main Stscore 87
Office · 494,512 sq ft
- 314 Main St.score 80
Office · 482,220 sq ft
- 303 Binney Stscore —
Laboratory · 480,000 sq ft
- 32 VASSAR STscore —
College/University · 464,005 sq ft
- 555 Technology Squarescore —
Laboratory · 457,000 sq ft
See also: most efficient in Cambridge · biggest emitters
How does 145 Broadway compare with other office buildings in Cambridge?
The latest disclosures cover 117 office buildings in Cambridge, out of 902 buildings citywide. 145 Broadway's ENERGY STAR score of 91 compares with an average of 64 across the 94 that report a score; it scores higher than 91% of them and lower than 5%. Its site EUI of 57.3 kBtu/ft² is about 27% below the average of 78.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 490,000 sq ft, it is about 304% above the average floor area of 121,167 sq ft for those buildings. It was built in 2019, 54 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 145 Broadway's energy performance changed over time?
BuildingCensus holds 6 Cambridge disclosures for 145 Broadway, covering report years 2019–2024. Its ENERGY STAR score went from 95 in 2020 to 91 in 2024 (-4 points); its best year on file was 2021, at 97. Site EUI moved from 43.1 kBtu/ft² (2020) to 57.3 kBtu/ft² (2024), an 33% increase.
What does an ENERGY STAR score of 91 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 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 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. 145 Broadway's 57.3 kBtu/ft² across 490,000 sq ft works out to about 28.1 billion Btu (8,229 MWh-equivalent) in 2024. Its source EUI of 128.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 5,571,359 kWh of electricity, 86,448 therms of natural gas and 2,774 thousand gallons of water for the year.
Which law requires 145 Broadway to report its energy use?
145 Broadway 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:B1062:2024). 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
- 314 Main St.· 482,220 sq ft · score 80 (B)
- 100 Binney· 430,305 sq ft · EUI 237.2 kBtu/ft²
- One Broadway· 392,085 sq ft · score 74 (B)
- One Memorial Drive· 369,436 sq ft · score 83 (B)
- One Hampshire St· 361,302 sq ft · score 5 (D)
- 450 Water Street· 350,500 sq ft · score 46 (D)
- 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 145 Broadway's energy grade?
145 Broadway scores 91 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 Cambridge disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 145 Broadway use?
Its 2024 site energy-use intensity was 57.3 kBtu/ft² (128.0 kBtu/ft² source) across 490,000 sq ft, including 5,571,359 kWh of electricity and 86,448 therms of natural gas.
What are 145 Broadway's carbon emissions?
145 Broadway reported 1,832 tCO₂e of greenhouse-gas emissions for 2024.
Where is 145 Broadway?
145 Broadway is in Cambridge, Massachusetts. Its coordinates are 42.36490, -71.08880 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 145 Broadway and when was it built?
145 Broadway has 490,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2019 as its year built. It is classed as office.
Is 145 Broadway 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, “145 Broadway, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/145-broadway-afe0be8e (data as of October 2, 2026).