At a glance
450 Water Street is a 350,500-square-foot office building in Cambridge, Massachusetts, built in 2022. In its 2024 Cambridge benchmarking disclosure it reported an ENERGY STAR score of 46 out of 100 (grade D), a site energy-use intensity of 97.7 kBtu/ft² and 2,202 tCO₂e of greenhouse-gas emissions. That score is higher than 22% of the 94 scored office buildings in Cambridge.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 46 (band D) |
| Site EUI | 97.7 kBtu/ft² |
| Source EUI | 202.7 kBtu/ft² |
| GHG emissions | 2,202 tCO₂e |
| GHG intensity | — |
| Electricity | 5,876,481 kWh |
| Natural gas | 141,984 therms |
| Water use | 3,926 kgal |
| Gross floor area | 350,500 sq ft |
| Source record | cambridge:B1837:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 46 | -5 | 97.7 kBtu/ft² | 2,202 tCO₂e |
| 2023 | 51 | 91.1 kBtu/ft² | 2,055 tCO₂e | |
| 2022 | — | — | 0 tCO₂e | |
| 2021 | — | — | 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
DW NP PROPERTY, LLC
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Location
- Address
- 450 Water Street
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.37220, -71.07140
Within ~1 km
Nearby benchmarked buildings
- 100 Cambridge Side Placescore —
Enclosed Mall · 747,697 sq ft
- One Leighton Streetscore 21
Multifamily Housing · 612,952 sq ft
- 50-60 Binney STscore —
Mixed Use Property · 532,739 sq ft
- 8-12 Museum Wayscore 88
Multifamily Housing · 525,000 sq ft
- 20 Child Streetscore 100
Multifamily Housing · 485,197 sq ft
- 222 Jacobs Streetscore —
Laboratory · 466,713 sq ft
See also: most efficient in Cambridge · biggest emitters
How does 450 Water Street compare with other office buildings in Cambridge?
The latest disclosures cover 117 office buildings in Cambridge, out of 902 buildings citywide. 450 Water Street's ENERGY STAR score of 46 compares with an average of 64 across the 94 that report a score; it scores higher than 22% of them and lower than 77%. Its site EUI of 97.7 kBtu/ft² is about 24% above the average of 78.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 350,500 sq ft, it is about 189% above the average floor area of 121,167 sq ft for those buildings. It was built in 2022, 57 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 450 Water Street's energy performance changed over time?
BuildingCensus holds 4 Cambridge disclosures for 450 Water Street, covering report years 2021–2024. Its ENERGY STAR score went from 51 in 2023 to 46 in 2024 (-5 points); its best year on file was 2023, at 51. Site EUI moved from 91.1 kBtu/ft² (2023) to 97.7 kBtu/ft² (2024), an 7% increase.
What does an ENERGY STAR score of 46 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 46 means the building performs better than about 46% of its national peers. BuildingCensus bands the score into report-card grades; 46 falls in band D — lowest band (1–54). It sits 29 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. 450 Water Street's 97.7 kBtu/ft² across 350,500 sq ft works out to about 34.2 billion Btu (10,036 MWh-equivalent) in 2024. Its source EUI of 202.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 5,876,481 kWh of electricity, 141,984 therms of natural gas and 3,926 thousand gallons of water for the year.
Which law requires 450 Water Street to report its energy use?
450 Water Street 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:B1837:2024). 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
- 500 Kendall Street· 349,325 sq ft · score 72 (B)
- 75 Mount Auburn Street· 345,571 sq ft · score 79 (B)
- 101 MAIN STREET· 341,830 sq ft · score 74 (B)
- 1 MAIN STREET· 332,808 sq ft · score 82 (B)
- 650 E Kendall Street· 328,136 sq ft · score 38 (D)
- 225 Binney St· 327,325 sq ft · score 84 (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 450 Water Street's energy grade?
450 Water Street scores 46 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 450 Water Street use?
Its 2024 site energy-use intensity was 97.7 kBtu/ft² (202.7 kBtu/ft² source) across 350,500 sq ft, including 5,876,481 kWh of electricity and 141,984 therms of natural gas.
What are 450 Water Street's carbon emissions?
450 Water Street reported 2,202 tCO₂e of greenhouse-gas emissions for 2024.
Where is 450 Water Street?
450 Water Street is in Cambridge, Massachusetts. Its coordinates are 42.37220, -71.07140 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 450 Water Street and when was it built?
450 Water Street has 350,500 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2022 as its year built. It is classed as office.
Is 450 Water Street 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, “450 Water Street, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/450-water-street-94de3c1b (data as of October 2, 2026).