350 Third St
Multifamily Housing in Cambridge, MA
At a glance
350 Third St is a 366,533-square-foot multifamily housing building in Cambridge, Massachusetts, built in 2006. In its 2024 Cambridge benchmarking disclosure it reported an ENERGY STAR score of 83 out of 100 (grade B), a site energy-use intensity of 51.7 kBtu/ft² and 1,149 tCO₂e of greenhouse-gas emissions. That score is higher than 47% of the 155 scored multifamily housing buildings in Cambridge.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 83 (band B) |
| Site EUI | 51.7 kBtu/ft² |
| Source EUI | 89.8 kBtu/ft² |
| GHG emissions | 1,149 tCO₂e |
| GHG intensity | — |
| Electricity | 2,174,054 kWh |
| Natural gas | 115,497 therms |
| Water use | 10,691 kgal |
| Gross floor area | 366,533 sq ft |
| Source record | cambridge:B1335:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 83 | +2 | 51.7 kBtu/ft² | 1,149 tCO₂e |
| 2023 | 81 | -1 | 52.7 kBtu/ft² | 1,167 tCO₂e |
| 2022 | 82 | -2 | 51.5 kBtu/ft² | 1,154 tCO₂e |
| 2021 | 84 | +1 | 50.4 kBtu/ft² | 1,131 tCO₂e |
| 2020 | 83 | +6 | 51.1 kBtu/ft² | 1,134 tCO₂e |
| 2019 | 77 | -9 | 57.4 kBtu/ft² | 1,221 tCO₂e |
| 2018 | 86 | +13 | 54.6 kBtu/ft² | 1,186 tCO₂e |
| 2017 | 73 | +11 | 58.3 kBtu/ft² | 1,316 tCO₂e |
| 2016 | 62 | -18 | 59.6 kBtu/ft² | 1,373 tCO₂e |
| 2015 | 80 | 58.6 kBtu/ft² | 1,322 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
TP/P KENDALL SQUARE, LLC.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 350 Third St
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.36350, -71.08280
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 350 Third St compare with other multifamily housing buildings in Cambridge?
The latest disclosures cover 187 multifamily housing buildings in Cambridge, out of 902 buildings citywide. 350 Third St's ENERGY STAR score of 83 compares with an average of 75 across the 155 that report a score; it scores higher than 47% of them and lower than 50%. Its site EUI of 51.7 kBtu/ft² is roughly in line with the average of 56.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 366,533 sq ft, it is about 177% above the average floor area of 132,415 sq ft for those buildings. It was built in 2006, 33 years later 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 350 Third St's energy performance changed over time?
BuildingCensus holds 10 Cambridge disclosures for 350 Third St, covering report years 2015–2024. Its ENERGY STAR score went from 80 in 2015 to 83 in 2024 (+3 points); its best year on file was 2018, at 86. Site EUI moved from 58.6 kBtu/ft² (2015) to 51.7 kBtu/ft² (2024), a 12% decrease. Reported emissions went from 1,322 tCO₂e to 1,149 tCO₂e over the same span (down 13%).
What does an ENERGY STAR score of 83 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 83 means the building performs better than about 83% of its national peers. BuildingCensus bands the score into report-card grades; 83 falls in band B — above median (70–84). 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. 350 Third St's 51.7 kBtu/ft² across 366,533 sq ft works out to about 18.9 billion Btu (5,554 MWh-equivalent) in 2024. Its source EUI of 89.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,174,054 kWh of electricity, 115,497 therms of natural gas and 10,691 thousand gallons of water for the year.
Which law requires 350 Third St to report its energy use?
350 Third 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:B1335:2024). 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
- 30 Cambridge Park Drive· 348,420 sq ft · score 99 (A)
- 50 Cambridgepark Dr· 344,122 sq ft · score 100 (A)
- 700 Huron Avenue· 343,624 sq ft · score 90 (A)
- 303 Third St· 324,872 sq ft · score 67 (C)
- 2 Earhart Street· 309,535 sq ft · score 76 (B)
- 1 First Street· 291,742 sq ft · score 80 (B)
- 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 350 Third St's energy grade?
350 Third St scores 83 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 Cambridge disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 350 Third St use?
Its 2024 site energy-use intensity was 51.7 kBtu/ft² (89.8 kBtu/ft² source) across 366,533 sq ft, including 2,174,054 kWh of electricity and 115,497 therms of natural gas.
What are 350 Third St's carbon emissions?
350 Third St reported 1,149 tCO₂e of greenhouse-gas emissions for 2024.
Where is 350 Third St?
350 Third St is in Cambridge, Massachusetts. Its coordinates are 42.36350, -71.08280 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 350 Third St and when was it built?
350 Third St has 366,533 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2006 as its year built. It is classed as multifamily housing.
Is 350 Third St covered by BEUDO?
Yes — it appears in the 2024 Building Energy Use Disclosure Ordinance (BEUDO) disclosure, which lists the buildings reporting under BEUDO.
Working with Cambridge building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “350 Third St, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/350-third-st-284789b9 (data as of October 2, 2026).