At a glance
1100 Massachusetts Avenue is a 49,308-square-foot office building in Cambridge, Massachusetts, built in 1978. In its 2024 Cambridge benchmarking disclosure it reported an ENERGY STAR score of 75 out of 100 (grade B), a site energy-use intensity of 50.1 kBtu/ft² and 153 tCO₂e of greenhouse-gas emissions. That score is higher than 57% of the 94 scored office buildings in Cambridge.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 75 (band B) |
| Site EUI | 50.1 kBtu/ft² |
| Source EUI | 93.8 kBtu/ft² |
| GHG emissions | 153 tCO₂e |
| GHG intensity | — |
| Electricity | 339,833 kWh |
| Natural gas | 13,111 therms |
| Water use | 120 kgal |
| Gross floor area | 49,308 sq ft |
| Source record | cambridge:B1106:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 75 | +12 | 50.1 kBtu/ft² | 153 tCO₂e |
| 2023 | 63 | +15 | 61.3 kBtu/ft² | 186 tCO₂e |
| 2022 | 48 | +4 | 61.7 kBtu/ft² | 189 tCO₂e |
| 2021 | 44 | -6 | 64.2 kBtu/ft² | 197 tCO₂e |
| 2020 | 50 | +1 | 66.5 kBtu/ft² | 199 tCO₂e |
| 2019 | 49 | ±0 | 88.3 kBtu/ft² | 253 tCO₂e |
| 2018 | 49 | -8 | 94.6 kBtu/ft² | 276 tCO₂e |
| 2017 | 57 | -13 | 94.1 kBtu/ft² | 295 tCO₂e |
| 2016 | 70 | -2 | 61.2 kBtu/ft² | 167 tCO₂e |
| 2015 | 72 | 50.3 kBtu/ft² | 190 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
SUN LIFE ASSURANCE CO OF CANADA
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Location
- Address
- 1100 Massachusetts Avenue
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.37040, -71.11370
Within ~1 km
Nearby benchmarked buildings
- 900 Memorial Drivescore 47
Multifamily Housing · 450,849 sq ft
- 459 Broadwayscore 71
K-12 School · 403,393 sq ft
- 1 Oxford Stscore —
College/University · 355,836 sq ft
- 1575 Cambridge Streetscore —
Outpatient Rehabilitation/Physical Therapy · 352,622 sq ft
- 75 Mount Auburn Streetscore 79
Office · 345,571 sq ft
- 1545 Massachusetts Avenuescore —
College/University · 281,097 sq ft
See also: most efficient in Cambridge · biggest emitters
How does 1100 Massachusetts Avenue compare with other office buildings in Cambridge?
The latest disclosures cover 117 office buildings in Cambridge, out of 902 buildings citywide. 1100 Massachusetts Avenue's ENERGY STAR score of 75 compares with an average of 64 across the 94 that report a score; it scores higher than 57% of them and lower than 41%. Its site EUI of 50.1 kBtu/ft² is about 36% below the average of 78.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 49,308 sq ft, it is about 59% below the average floor area of 121,167 sq ft for those buildings. It was built in 1978, 13 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 1100 Massachusetts Avenue's energy performance changed over time?
BuildingCensus holds 10 Cambridge disclosures for 1100 Massachusetts Avenue, covering report years 2015–2024. Its ENERGY STAR score went from 72 in 2015 to 75 in 2024 (+3 points). Site EUI moved from 50.3 kBtu/ft² (2015) to 50.1 kBtu/ft² (2024), a 0% decrease. Reported emissions went from 190 tCO₂e to 153 tCO₂e over the same span (down 19%).
What does an ENERGY STAR score of 75 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 75 means the building performs better than about 75% of its national peers. BuildingCensus bands the score into report-card grades; 75 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. 1100 Massachusetts Avenue's 50.1 kBtu/ft² across 49,308 sq ft works out to about 2.5 billion Btu (724 MWh-equivalent) in 2024. Its source EUI of 93.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 339,833 kWh of electricity, 13,111 therms of natural gas and 120 thousand gallons of water for the year.
Which law requires 1100 Massachusetts Avenue to report its energy use?
1100 Massachusetts Avenue 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:B1106:2024). 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
- 700 Technology Square· 48,930 sq ft · score 17 (D)
- 614-622 Massachusetts Ave· 48,560 sq ft · score 97 (A)
- 161 3RD ST· 46,356 sq ft · EUI 23.1 kBtu/ft²
- 515 Massachusetts Ave, Cambridge, MA 02139, USA· 46,350 sq ft · score 100 (A)
- 51 Brattle Street· 46,245 sq ft · score 45 (D)
- 125 Mount Auburn Street· 46,085 sq ft · score 32 (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 1100 Massachusetts Avenue's energy grade?
1100 Massachusetts Avenue scores 75 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 Cambridge disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1100 Massachusetts Avenue use?
Its 2024 site energy-use intensity was 50.1 kBtu/ft² (93.8 kBtu/ft² source) across 49,308 sq ft, including 339,833 kWh of electricity and 13,111 therms of natural gas.
What are 1100 Massachusetts Avenue's carbon emissions?
1100 Massachusetts Avenue reported 153 tCO₂e of greenhouse-gas emissions for 2024.
Where is 1100 Massachusetts Avenue?
1100 Massachusetts Avenue is in Cambridge, Massachusetts. Its coordinates are 42.37040, -71.11370 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 1100 Massachusetts Avenue and when was it built?
1100 Massachusetts Avenue has 49,308 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1978 as its year built. It is classed as office.
Is 1100 Massachusetts Avenue 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, “1100 Massachusetts Avenue, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/1100-massachusetts-avenue-0ba6abd7 (data as of October 2, 2026).