99 Brattle St
College/University in Cambridge, MA
At a glance
99 Brattle St is a 210,512-square-foot college/university building in Cambridge, Massachusetts, built in 1924. In its 2024 Cambridge benchmarking disclosure it reported a site energy-use intensity of 53.3 kBtu/ft² and 666 tCO₂e of greenhouse-gas emissions.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 53.3 kBtu/ft² |
| Source EUI | 86.4 kBtu/ft² |
| GHG emissions | 666 tCO₂e |
| GHG intensity | — |
| Electricity | 1,074,426 kWh |
| Natural gas | 75,546 therms |
| Water use | 608 kgal |
| Gross floor area | 210,512 sq ft |
| Source record | cambridge:B1066:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 53.3 kBtu/ft² | 666 tCO₂e | |
| 2023 | — | 36.6 kBtu/ft² | 477 tCO₂e | |
| 2022 | — | 30.0 kBtu/ft² | 387 tCO₂e | |
| 2021 | — | — | 141 tCO₂e | |
| 2020 | — | 35.1 kBtu/ft² | 425 tCO₂e | |
| 2019 | — | — | 470 tCO₂e | |
| 2018 | — | 44.0 kBtu/ft² | 534 tCO₂e | |
| 2017 | — | — | 207 tCO₂e | |
| 2016 | — | — | 237 tCO₂e | |
| 2015 | — | — | 255 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
LESLEY UNIVERSITY
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Location
- Address
- 99 Brattle St
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.37670, -71.12500
Within ~1 km
Nearby benchmarked buildings
- 330 Mount Auburn Stscore 76
Hospital (General Medical & Surgical) · 652,524 sq ft
- 1 Bennet Streetscore 67
Hotel · 498,000 sq ft
- 75 Mount Auburn Streetscore 79
Office · 345,571 sq ft
- 1545 Massachusetts Avenuescore —
College/University · 281,097 sq ft
- 1586 Massachusetts Avenuescore —
College/University · 262,602 sq ft
- 95 Dunster Stscore —
Residence Hall/Dormitory · 257,543 sq ft
See also: most efficient in Cambridge · biggest emitters
How does 99 Brattle St compare with other college/university buildings in Cambridge?
The latest disclosures cover 203 college/university buildings in Cambridge, out of 902 buildings citywide. Its site EUI of 53.3 kBtu/ft² is about 65% below the average of 154.3 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 210,512 sq ft, it is about twice the average floor area of 96,964 sq ft for those buildings. It was built in 1924, 25 years earlier than the group's average year built (1949). Across all 24 jurisdictions BuildingCensus covers, the 2,113 college/university buildings average an ENERGY STAR score of 68 and a site EUI of 98.7 kBtu/ft².
How has 99 Brattle St's energy performance changed over time?
BuildingCensus holds 10 Cambridge disclosures for 99 Brattle St, covering report years 2015–2024. Site EUI moved from 44.0 kBtu/ft² (2018) to 53.3 kBtu/ft² (2024), an 21% increase. Reported emissions went from 255 tCO₂e to 666 tCO₂e over the same span (up 161%).
What does a site EUI of 53.3 kBtu/ft² mean?
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. 99 Brattle St's 53.3 kBtu/ft² across 210,512 sq ft works out to about 11.2 billion Btu (3,288 MWh-equivalent) in 2024. Its source EUI of 86.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,074,426 kWh of electricity, 75,546 therms of natural gas and 608 thousand gallons of water for the year.
Which law requires 99 Brattle St to report its energy use?
99 Brattle 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:B1066:2024). 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 college/university buildings in Cambridge
- 229 VASSAR ST· 191,190 sq ft · EUI 72.2 kBtu/ft²
- 305 MEMORIAL DR· 189,693 sq ft · EUI 86.8 kBtu/ft²
- 125 VASSAR ST· 186,998 sq ft
- 105 MASSACHUSETTS AVE (REAR)· 183,169 sq ft · EUI 531.7 kBtu/ft²
- 84 MASSACHUSETTS AVE· 183,162 sq ft · EUI 157.9 kBtu/ft²
- 15 Oxford St· 173,885 sq ft · EUI 461.0 kBtu/ft²
- College/University buildings in Cambridge· 203 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 99 Brattle St's energy grade?
99 Brattle St did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 53.3 kBtu/ft².
How much energy does 99 Brattle St use?
Its 2024 site energy-use intensity was 53.3 kBtu/ft² (86.4 kBtu/ft² source) across 210,512 sq ft, including 1,074,426 kWh of electricity and 75,546 therms of natural gas.
What are 99 Brattle St's carbon emissions?
99 Brattle St reported 666 tCO₂e of greenhouse-gas emissions for 2024.
Where is 99 Brattle St?
99 Brattle St is in Cambridge, Massachusetts. Its coordinates are 42.37670, -71.12500 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 99 Brattle St and when was it built?
99 Brattle St has 210,512 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1924 as its year built. It is classed as college/university.
Is 99 Brattle St 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, “99 Brattle St, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/99-brattle-st-a5307756 (data as of October 2, 2026).