20 Sidney St
Hotel in Cambridge, MA
At a glance
20 Sidney St is a 202,615-square-foot hotel in Cambridge, Massachusetts, built in 1998. In its 2024 Cambridge benchmarking disclosure it reported an ENERGY STAR score of 35 out of 100 (grade D), a site energy-use intensity of 91.7 kBtu/ft² and 1,223 tCO₂e of greenhouse-gas emissions. That score is higher than 28% of the 18 scored hotel buildings in Cambridge.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 35 (band D) |
| Site EUI | 91.7 kBtu/ft² |
| Source EUI | 203.0 kBtu/ft² |
| GHG emissions | 1,223 tCO₂e |
| GHG intensity | — |
| Electricity | 3,620,761 kWh |
| Natural gas | 62,268 therms |
| Water use | 6,746 kgal |
| Gross floor area | 202,615 sq ft |
| Source record | cambridge:B1581:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 35 | +1 | 91.7 kBtu/ft² | 1,223 tCO₂e |
| 2023 | 34 | +6 | 88.8 kBtu/ft² | 1,196 tCO₂e |
| 2022 | 28 | -16 | 92.1 kBtu/ft² | 1,254 tCO₂e |
| 2021 | 44 | +17 | 75.1 kBtu/ft² | 1,047 tCO₂e |
| 2020 | 27 | -27 | 84.4 kBtu/ft² | 1,178 tCO₂e |
| 2019 | 54 | +34 | 83.5 kBtu/ft² | 1,023 tCO₂e |
| 2018 | 20 | +18 | 107.4 kBtu/ft² | 1,409 tCO₂e |
| 2017 | 2 | ±0 | 167.1 kBtu/ft² | 2,274 tCO₂e |
| 2016 | 2 | -1 | 163.5 kBtu/ft² | 2,219 tCO₂e |
| 2015 | 3 | 156.6 kBtu/ft² | 2,148 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
MASSACHUSETTS INSTITUTE OF TECHNOLOGY
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Location
- Address
- 20 Sidney St
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.36190, -71.10010
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
- 575 Memorial Drivescore 37
Hotel · 347,000 sq ft
- 610 Main Streetscore —
Laboratory · 278,738 sq ft
- 45 Sidney Streetscore —
Laboratory · 277,000 sq ft
See also: most efficient in Cambridge · biggest emitters
How does 20 Sidney St compare with other hotel buildings in Cambridge?
The latest disclosures cover 19 hotel buildings in Cambridge, out of 902 buildings citywide. 20 Sidney St's ENERGY STAR score of 35 compares with an average of 55 across the 18 that report a score; it scores higher than 28% of them and lower than 67%. Its site EUI of 91.7 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 202,615 sq ft, it is about 39% above the average floor area of 146,134 sq ft for those buildings. It was built in 1998, 9 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 20 Sidney St's energy performance changed over time?
BuildingCensus holds 10 Cambridge disclosures for 20 Sidney St, covering report years 2015–2024. Its ENERGY STAR score went from 3 in 2015 to 35 in 2024 (+32 points); its best year on file was 2019, at 54. Site EUI moved from 156.6 kBtu/ft² (2015) to 91.7 kBtu/ft² (2024), a 41% decrease. Reported emissions went from 2,148 tCO₂e to 1,223 tCO₂e over the same span (down 43%).
What does an ENERGY STAR score of 35 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 35 means the building performs better than about 35% of its national peers. BuildingCensus bands the score into report-card grades; 35 falls in band D — lowest band (1–54). It sits 40 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. 20 Sidney St's 91.7 kBtu/ft² across 202,615 sq ft works out to about 18.6 billion Btu (5,445 MWh-equivalent) in 2024. Its source EUI of 203.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,620,761 kWh of electricity, 62,268 therms of natural gas and 6,746 thousand gallons of water for the year.
Which law requires 20 Sidney St to report its energy use?
20 Sidney 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:B1581:2024). 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 hotel buildings in Cambridge
- 6 Cambridge Center· 181,700 sq ft · score 66 (C)
- 25 Edwin H Land Blvd.· 153,627 sq ft · score 34 (D)
- 16 Garden St.· 134,200 sq ft · score 94 (A)
- 777 Memorial Drive· 105,000 sq ft · score 72 (B)
- 10 Acorn Park Drive· 84,930 sq ft · score 92 (A)
- 187-197 Monsignor O'Brien Highway· 79,942 sq ft · score 92 (A)
- 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 20 Sidney St's energy grade?
20 Sidney St scores 35 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 20 Sidney St use?
Its 2024 site energy-use intensity was 91.7 kBtu/ft² (203.0 kBtu/ft² source) across 202,615 sq ft, including 3,620,761 kWh of electricity and 62,268 therms of natural gas.
What are 20 Sidney St's carbon emissions?
20 Sidney St reported 1,223 tCO₂e of greenhouse-gas emissions for 2024.
Where is 20 Sidney St?
20 Sidney St is in Cambridge, Massachusetts. Its coordinates are 42.36190, -71.10010 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 20 Sidney St and when was it built?
20 Sidney St has 202,615 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1998 as its year built. It is classed as hotel.
Is 20 Sidney 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, “20 Sidney St, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/20-sidney-st-3f4e0d91 (data as of October 2, 2026).