929 Massachusetts Ave.
Multifamily Housing in Cambridge, MA
At a glance
929 Massachusetts Ave. is a 120,066-square-foot multifamily housing building in Cambridge, Massachusetts, built in 1975. In its 2024 Cambridge benchmarking disclosure it reported an ENERGY STAR score of 78 out of 100 (grade B), a site energy-use intensity of 43.7 kBtu/ft² and 355 tCO₂e of greenhouse-gas emissions. That score is higher than 41% of the 155 scored multifamily housing buildings in Cambridge.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 78 (band B) |
| Site EUI | 43.7 kBtu/ft² |
| Source EUI | 104.1 kBtu/ft² |
| GHG emissions | 355 tCO₂e |
| GHG intensity | — |
| Electricity | 1,170,126 kWh |
| Natural gas | 12,520 therms |
| Water use | 2,596 kgal |
| Gross floor area | 120,066 sq ft |
| Source record | cambridge:B1455:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 78 | -2 | 43.7 kBtu/ft² | 355 tCO₂e |
| 2023 | 80 | +1 | 42.6 kBtu/ft² | 346 tCO₂e |
| 2022 | 79 | -4 | 44.6 kBtu/ft² | 360 tCO₂e |
| 2021 | 83 | +7 | 42.0 kBtu/ft² | 343 tCO₂e |
| 2020 | 76 | +15 | 45.5 kBtu/ft² | 362 tCO₂e |
| 2019 | 61 | -5 | 51.6 kBtu/ft² | 388 tCO₂e |
| 2018 | 66 | -10 | 51.0 kBtu/ft² | 404 tCO₂e |
| 2017 | 76 | ±0 | 46.5 kBtu/ft² | 386 tCO₂e |
| 2016 | 76 | +10 | 46.0 kBtu/ft² | 382 tCO₂e |
| 2015 | 66 | 51.5 kBtu/ft² | 436 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
GPT-929 HOUSE, LLC.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 929 Massachusetts Ave.
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.36910, -71.10880
Within ~1 km
Nearby benchmarked buildings
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- 459 Broadwayscore 71
K-12 School · 403,393 sq ft
- 1493 Cambridge Streetscore 33
Hospital (General Medical & Surgical) · 360,250 sq ft
- 1 Oxford Stscore —
College/University · 355,836 sq ft
- 1575 Cambridge Streetscore —
Outpatient Rehabilitation/Physical Therapy · 352,622 sq ft
- 812 Memorial Drscore 99
Multifamily Housing · 283,150 sq ft
See also: most efficient in Cambridge · biggest emitters
How does 929 Massachusetts Ave. compare with other multifamily housing buildings in Cambridge?
The latest disclosures cover 187 multifamily housing buildings in Cambridge, out of 902 buildings citywide. 929 Massachusetts Ave.'s ENERGY STAR score of 78 compares with an average of 75 across the 155 that report a score; it scores higher than 41% of them and lower than 56%. Its site EUI of 43.7 kBtu/ft² is about 23% below the average of 56.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 120,066 sq ft, it is roughly in line with the average floor area of 132,415 sq ft for those buildings. Its 1975 construction date is close to 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 929 Massachusetts Ave.'s energy performance changed over time?
BuildingCensus holds 10 Cambridge disclosures for 929 Massachusetts Ave., covering report years 2015–2024. Its ENERGY STAR score went from 66 in 2015 to 78 in 2024 (+12 points); its best year on file was 2021, at 83. Site EUI moved from 51.5 kBtu/ft² (2015) to 43.7 kBtu/ft² (2024), a 15% decrease. Reported emissions went from 436 tCO₂e to 355 tCO₂e over the same span (down 19%).
What does an ENERGY STAR score of 78 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 78 means the building performs better than about 78% of its national peers. BuildingCensus bands the score into report-card grades; 78 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. 929 Massachusetts Ave.'s 43.7 kBtu/ft² across 120,066 sq ft works out to about 5.2 billion Btu (1,538 MWh-equivalent) in 2024. Its source EUI of 104.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,170,126 kWh of electricity, 12,520 therms of natural gas and 2,596 thousand gallons of water for the year.
Which law requires 929 Massachusetts Ave. to report its energy use?
929 Massachusetts Ave. 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:B1455:2024). 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
- 10 Magazine St.· 119,854 sq ft · score 97 (A)
- 247 Garden Street· 117,581 sq ft · score 86 (A)
- 5-8 Craigie Circle· 115,986 sq ft · score 100 (A)
- 29 Garden Street· 112,985 sq ft · score 61 (C)
- 675 Concord Avenue· 109,781 sq ft · score 100 (A)
- 989 Memorial Drive· 109,285 sq ft · score 92 (A)
- 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 929 Massachusetts Ave.'s energy grade?
929 Massachusetts Ave. scores 78 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 929 Massachusetts Ave. use?
Its 2024 site energy-use intensity was 43.7 kBtu/ft² (104.1 kBtu/ft² source) across 120,066 sq ft, including 1,170,126 kWh of electricity and 12,520 therms of natural gas.
What are 929 Massachusetts Ave.'s carbon emissions?
929 Massachusetts Ave. reported 355 tCO₂e of greenhouse-gas emissions for 2024.
Where is 929 Massachusetts Ave.?
929 Massachusetts Ave. is in Cambridge, Massachusetts. Its coordinates are 42.36910, -71.10880 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 929 Massachusetts Ave. and when was it built?
929 Massachusetts Ave. has 120,066 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1975 as its year built. It is classed as multifamily housing.
Is 929 Massachusetts Ave. 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, “929 Massachusetts Ave., Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/929-massachusetts-ave-c245a3b4 (data as of October 2, 2026).