300 3 Rd ST
Mixed Use Property in Cambridge, MA
At a glance
300 3 Rd ST is a 131,639-square-foot mixed use property building in Cambridge, Massachusetts, built in 1999. In its 2024 Cambridge benchmarking disclosure it reported a site energy-use intensity of 255.9 kBtu/ft² and 2,109 tCO₂e of greenhouse-gas emissions.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 255.9 kBtu/ft² |
| Source EUI | 491.0 kBtu/ft² |
| GHG emissions | 2,109 tCO₂e |
| GHG intensity | — |
| Electricity | 4,901,522 kWh |
| Natural gas | 169,636 therms |
| Water use | 4,362 kgal |
| Gross floor area | 131,639 sq ft |
| Source record | cambridge:B1120:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 255.9 kBtu/ft² | 2,109 tCO₂e | |
| 2023 | — | 264.5 kBtu/ft² | 2,174 tCO₂e | |
| 2022 | — | 294.0 kBtu/ft² | 2,420 tCO₂e | |
| 2021 | — | 294.2 kBtu/ft² | 2,420 tCO₂e | |
| 2020 | — | 247.3 kBtu/ft² | 2,049 tCO₂e | |
| 2019 | — | 351.4 kBtu/ft² | 2,800 tCO₂e | |
| 2018 | — | 372.7 kBtu/ft² | 3,090 tCO₂e | |
| 2017 | — | 371.8 kBtu/ft² | 3,221 tCO₂e | |
| 2016 | — | 377.2 kBtu/ft² | 3,242 tCO₂e | |
| 2015 | — | 431.9 kBtu/ft² | 3,766 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
MIT 300 THIRD LLC
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Location
- Address
- 300 3 Rd ST
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.36530, -71.08200
Within ~1 km
Nearby benchmarked buildings
- 100 Cambridge Side Placescore —
Enclosed Mall · 747,697 sq ft
- 50-60 Binney STscore —
Mixed Use Property · 532,739 sq ft
- 325 Main Stscore 87
Office · 494,512 sq ft
- 145 Broadwayscore 91
Office · 490,000 sq ft
- 314 Main St.score 80
Office · 482,220 sq ft
- 303 Binney Stscore —
Laboratory · 480,000 sq ft
See also: most efficient in Cambridge · biggest emitters
How does 300 3 Rd ST compare with other mixed use property buildings in Cambridge?
The latest disclosures cover 22 mixed use property buildings in Cambridge, out of 902 buildings citywide. Its site EUI of 255.9 kBtu/ft² is about 59% above the average of 160.5 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 131,639 sq ft, it is roughly in line with the average floor area of 121,587 sq ft for those buildings. It was built in 1999, 29 years later than the group's average year built (1970). Across all 24 jurisdictions BuildingCensus covers, the 1,212 mixed use property buildings average an ENERGY STAR score of 69 and a site EUI of 79.8 kBtu/ft².
How has 300 3 Rd ST's energy performance changed over time?
BuildingCensus holds 10 Cambridge disclosures for 300 3 Rd ST, covering report years 2015–2024. Site EUI moved from 431.9 kBtu/ft² (2015) to 255.9 kBtu/ft² (2024), a 41% decrease. Reported emissions went from 3,766 tCO₂e to 2,109 tCO₂e over the same span (down 44%).
What does a site EUI of 255.9 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. 300 3 Rd ST's 255.9 kBtu/ft² across 131,639 sq ft works out to about 33.7 billion Btu (9,873 MWh-equivalent) in 2024. Its source EUI of 491.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 4,901,522 kWh of electricity, 169,636 therms of natural gas and 4,362 thousand gallons of water for the year.
Which law requires 300 3 Rd ST to report its energy use?
300 3 Rd 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:B1120:2024). 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 mixed use property buildings in Cambridge
- 50 Church Street· 96,605 sq ft · EUI 26.3 kBtu/ft²
- One Kendall Square· 71,730 sq ft · EUI 171.1 kBtu/ft²
- 81 Mt Auburn Street· 62,592 sq ft · EUI 47.1 kBtu/ft²
- 127 Smith Place· 57,521 sq ft · EUI 12.4 kBtu/ft²
- 29 - 31 Smith Place· 53,926 sq ft · EUI 70.4 kBtu/ft²
- 67 Smith Place· 53,000 sq ft · EUI 12.0 kBtu/ft²
- 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 300 3 Rd ST's energy grade?
300 3 Rd ST did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 255.9 kBtu/ft².
How much energy does 300 3 Rd ST use?
Its 2024 site energy-use intensity was 255.9 kBtu/ft² (491.0 kBtu/ft² source) across 131,639 sq ft, including 4,901,522 kWh of electricity and 169,636 therms of natural gas.
What are 300 3 Rd ST's carbon emissions?
300 3 Rd ST reported 2,109 tCO₂e of greenhouse-gas emissions for 2024.
Where is 300 3 Rd ST?
300 3 Rd ST is in Cambridge, Massachusetts. Its coordinates are 42.36530, -71.08200 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 300 3 Rd ST and when was it built?
300 3 Rd ST has 131,639 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1999 as its year built. It is classed as mixed use property.
Is 300 3 Rd 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, “300 3 Rd ST, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/300-3-rd-st-b0ad2434 (data as of October 2, 2026).