26 Chauncy St
Multifamily Housing in Cambridge, MA
At a glance
26 Chauncy St is a 80,670-square-foot multifamily housing building in Cambridge, Massachusetts, built in 1890. In its 2024 Cambridge benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 18.5 kBtu/ft² and 108 tCO₂e of greenhouse-gas emissions. That score is higher than 85% of the 155 scored multifamily housing buildings in Cambridge.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 18.5 kBtu/ft² |
| Source EUI | 51.7 kBtu/ft² |
| GHG emissions | 108 tCO₂e |
| GHG intensity | — |
| Electricity | 436,430 kWh |
| Natural gas | 0 therms |
| Water use | 1,706 kgal |
| Gross floor area | 80,670 sq ft |
| Source record | cambridge:B1131:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | +28 | 18.5 kBtu/ft² | 108 tCO₂e |
| 2023 | 72 | -28 | 54.4 kBtu/ft² | 258 tCO₂e |
| 2022 | 100 | ±0 | 10.6 kBtu/ft² | 399 tCO₂e |
| 2021 | 100 | ±0 | 8.4 kBtu/ft² | 395 tCO₂e |
| 2020 | 100 | ±0 | 9.6 kBtu/ft² | 235 tCO₂e |
| 2019 | 100 | ±0 | 11.2 kBtu/ft² | 258 tCO₂e |
| 2018 | 100 | ±0 | 12.2 kBtu/ft² | 295 tCO₂e |
| 2017 | 100 | +2 | 12.8 kBtu/ft² | 311 tCO₂e |
| 2016 | 98 | 57.2 kBtu/ft² | 240 tCO₂e | |
| 2015 | — | — | 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
CHAUNCY COURT LLC,
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Location
- Address
- 26 Chauncy St
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.37920, -71.12290
Within ~1 km
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See also: most efficient in Cambridge · biggest emitters
How does 26 Chauncy St compare with other multifamily housing buildings in Cambridge?
The latest disclosures cover 187 multifamily housing buildings in Cambridge, out of 902 buildings citywide. 26 Chauncy St's ENERGY STAR score of 100 compares with an average of 75 across the 155 that report a score; it scores higher than 85% of them. Its site EUI of 18.5 kBtu/ft² is about 67% below the average of 56.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 80,670 sq ft, it is about 39% below the average floor area of 132,415 sq ft for those buildings. It was built in 1890, 83 years earlier than the group's average year built (1973). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has 26 Chauncy St's energy performance changed over time?
BuildingCensus holds 10 Cambridge disclosures for 26 Chauncy St, covering report years 2015–2024. Its ENERGY STAR score went from 98 in 2016 to 100 in 2024 (+2 points); its best year on file was 2017, at 100. Site EUI moved from 57.2 kBtu/ft² (2016) to 18.5 kBtu/ft² (2024), a 68% decrease.
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. 26 Chauncy St's 18.5 kBtu/ft² across 80,670 sq ft works out to about 1.5 billion Btu (437 MWh-equivalent) in 2024. Its source EUI of 51.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 436,430 kWh of electricity, 0 therms of natural gas and 1,706 thousand gallons of water for the year.
Which law requires 26 Chauncy St to report its energy use?
26 Chauncy 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:B1131:2024). 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 multifamily housing buildings in Cambridge
- 29 Concord Avenue· 79,017 sq ft · score 79 (B)
- 15 Everett Street· 77,455 sq ft · score 94 (A)
- 77 New Street· 76,350 sq ft · score 99 (A)
- 10 Dana St· 75,000 sq ft · score 93 (A)
- 85-95 Prescott Street· 73,171 sq ft · score 94 (A)
- 1 Woodrow WIlson Ct· 72,970 sq ft · score 62 (C)
- Multifamily Housing buildings in Cambridge· 187 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 26 Chauncy St's energy grade?
26 Chauncy St scores 100 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 26 Chauncy St use?
Its 2024 site energy-use intensity was 18.5 kBtu/ft² (51.7 kBtu/ft² source) across 80,670 sq ft, including 436,430 kWh of electricity and 0 therms of natural gas.
What are 26 Chauncy St's carbon emissions?
26 Chauncy St reported 108 tCO₂e of greenhouse-gas emissions for 2024.
Where is 26 Chauncy St?
26 Chauncy St is in Cambridge, Massachusetts. Its coordinates are 42.37920, -71.12290 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 26 Chauncy St and when was it built?
26 Chauncy St has 80,670 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1890 as its year built. It is classed as multifamily housing.
Is 26 Chauncy 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, “26 Chauncy St, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/26-chauncy-st-96743b30 (data as of October 2, 2026).