At a glance
625 Mount Auburn St is a 137,421-square-foot office building in Cambridge, Massachusetts, built in 1962. In its 2024 Cambridge benchmarking disclosure it reported an ENERGY STAR score of 41 out of 100 (grade D), a site energy-use intensity of 85.2 kBtu/ft² and 843 tCO₂e of greenhouse-gas emissions. That score is higher than 17% of the 94 scored office buildings in Cambridge.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 41 (band D) |
| Site EUI | 85.2 kBtu/ft² |
| Source EUI | 237.0 kBtu/ft² |
| GHG emissions | 843 tCO₂e |
| GHG intensity | — |
| Electricity | 3,396,303 kWh |
| Natural gas | 1,160 therms |
| Water use | 849 kgal |
| Gross floor area | 137,421 sq ft |
| Source record | cambridge:B1732:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 41 | -5 | 85.2 kBtu/ft² | 843 tCO₂e |
| 2023 | 46 | -8 | 79.8 kBtu/ft² | 790 tCO₂e |
| 2022 | 54 | -7 | 74.1 kBtu/ft² | 729 tCO₂e |
| 2021 | 61 | +4 | 67.2 kBtu/ft² | 666 tCO₂e |
| 2020 | 57 | +8 | 71.2 kBtu/ft² | 692 tCO₂e |
| 2019 | 49 | -20 | 79.9 kBtu/ft² | 716 tCO₂e |
| 2018 | 69 | -2 | 62.4 kBtu/ft² | 595 tCO₂e |
| 2017 | 71 | +3 | 60.9 kBtu/ft² | 618 tCO₂e |
| 2016 | 68 | ±0 | 63.5 kBtu/ft² | 641 tCO₂e |
| 2015 | 68 | 65.0 kBtu/ft² | 670 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
NC-P MOUNT AUBURN, LLC
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Location
- Address
- 625 Mount Auburn St
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.37560, -71.14710
Within ~1 km
Nearby benchmarked buildings
- 700 Huron Avenuescore 90
Multifamily Housing · 343,624 sq ft
- 1 Corcoran Lanescore 52
Multifamily Housing · 200,633 sq ft
- 250 Fresh Pond Parkwayscore —
Drinking Water Treatment & Distribution · 155,632 sq ft
- 699 Mount Auburn Streetscore 95
Supermarket/Grocery Store · 66,108 sq ft
- 6 Fresh Pond Placescore 65
Multifamily Housing · 57,875 sq ft
- 110 Cushing Streetscore 40
K-12 School · 53,664 sq ft
See also: most efficient in Cambridge · biggest emitters
How does 625 Mount Auburn St compare with other office buildings in Cambridge?
The latest disclosures cover 117 office buildings in Cambridge, out of 902 buildings citywide. 625 Mount Auburn St's ENERGY STAR score of 41 compares with an average of 64 across the 94 that report a score; it scores higher than 17% of them and lower than 82%. Its site EUI of 85.2 kBtu/ft² is roughly in line with the average of 78.7 kBtu/ft².
At 137,421 sq ft, it is about 13% above the average floor area of 121,167 sq ft for those buildings. It was built in 1962, 3 years earlier 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 625 Mount Auburn St's energy performance changed over time?
BuildingCensus holds 10 Cambridge disclosures for 625 Mount Auburn St, covering report years 2015–2024. Its ENERGY STAR score went from 68 in 2015 to 41 in 2024 (-27 points); its best year on file was 2017, at 71. Site EUI moved from 65.0 kBtu/ft² (2015) to 85.2 kBtu/ft² (2024), an 31% increase. Reported emissions went from 670 tCO₂e to 843 tCO₂e over the same span (up 26%).
What does an ENERGY STAR score of 41 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 41 means the building performs better than about 41% of its national peers. BuildingCensus bands the score into report-card grades; 41 falls in band D — lowest band (1–54). It sits 34 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. 625 Mount Auburn St's 85.2 kBtu/ft² across 137,421 sq ft works out to about 11.7 billion Btu (3,431 MWh-equivalent) in 2024. Its source EUI of 237.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,396,303 kWh of electricity, 1,160 therms of natural gas and 849 thousand gallons of water for the year.
Which law requires 625 Mount Auburn St to report its energy use?
625 Mount Auburn 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:B1732:2024). 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
- 141 Portland Street· 135,928 sq ft · score 50 (D)
- 10 Canal Park· 135,710 sq ft · score 66 (C)
- 675 Mass Ave· 127,880 sq ft · score 54 (D)
- 600 Technology Square· 127,224 sq ft · score 8 (D)
- One Kendall Square· 126,031 sq ft · EUI 100.5 kBtu/ft²
- 625 Massachusetts Ave· 122,104 sq ft · score 77 (B)
- 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 625 Mount Auburn St's energy grade?
625 Mount Auburn St scores 41 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 625 Mount Auburn St use?
Its 2024 site energy-use intensity was 85.2 kBtu/ft² (237.0 kBtu/ft² source) across 137,421 sq ft, including 3,396,303 kWh of electricity and 1,160 therms of natural gas.
What are 625 Mount Auburn St's carbon emissions?
625 Mount Auburn St reported 843 tCO₂e of greenhouse-gas emissions for 2024.
Where is 625 Mount Auburn St?
625 Mount Auburn St is in Cambridge, Massachusetts. Its coordinates are 42.37560, -71.14710 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 625 Mount Auburn St and when was it built?
625 Mount Auburn St has 137,421 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1962 as its year built. It is classed as office.
Is 625 Mount Auburn 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, “625 Mount Auburn St, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/625-mount-auburn-st-e17c55d6 (data as of October 2, 2026).