449 Broadway
Library in Cambridge, MA
At a glance
449 Broadway is a 120,185-square-foot library in Cambridge, Massachusetts, built in 2009. In its 2024 Cambridge benchmarking disclosure it reported a site energy-use intensity of 69.4 kBtu/ft² and 686 tCO₂e of greenhouse-gas emissions.
BEUDO · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 69.4 kBtu/ft² |
| Source EUI | 142.5 kBtu/ft² |
| GHG emissions | 686 tCO₂e |
| GHG intensity | — |
| Electricity | 1,201,074 kWh |
| Natural gas | 73,481 therms |
| Water use | 3,317 kgal |
| Gross floor area | 120,185 sq ft |
| Source record | cambridge:B1050:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 69.4 kBtu/ft² | 686 tCO₂e | |
| 2023 | — | 124.1 kBtu/ft² | 749 tCO₂e | |
| 2022 | — | 120.9 kBtu/ft² | 732 tCO₂e | |
| 2021 | — | 126.8 kBtu/ft² | 772 tCO₂e | |
| 2020 | — | 115.8 kBtu/ft² | 695 tCO₂e | |
| 2019 | — | 113.5 kBtu/ft² | 668 tCO₂e | |
| 2018 | — | 126.2 kBtu/ft² | 779 tCO₂e | |
| 2017 | — | 116.9 kBtu/ft² | 754 tCO₂e | |
| 2016 | — | 122.3 kBtu/ft² | 793 tCO₂e | |
| 2015 | — | 133.7 kBtu/ft² | 881 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
CAMBRIDGE CITY OF
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 449 Broadway
- City
- Cambridge
- State
- Massachusetts
- Coordinates
- 42.37400, -71.11050
Within ~1 km
Nearby benchmarked buildings
- 52 Oxford Stscore —
College/University · 551,387 sq ft
- 900 Memorial Drivescore 47
Multifamily Housing · 450,849 sq ft
- 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
See also: most efficient in Cambridge · biggest emitters
How does 449 Broadway compare with other buildings in Cambridge?
The latest disclosures cover 902 benchmarked buildings in Cambridge. Its site EUI of 69.4 kBtu/ft² is about 41% below the average of 117.2 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 120,185 sq ft, it is roughly in line with the average floor area of 114,869 sq ft for those buildings. It was built in 2009, 47 years later than the group's average year built (1962).
How has 449 Broadway's energy performance changed over time?
BuildingCensus holds 10 Cambridge disclosures for 449 Broadway, covering report years 2015–2024. Site EUI moved from 133.7 kBtu/ft² (2015) to 69.4 kBtu/ft² (2024), a 48% decrease. Reported emissions went from 881 tCO₂e to 686 tCO₂e over the same span (down 22%).
What does a site EUI of 69.4 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. 449 Broadway's 69.4 kBtu/ft² across 120,185 sq ft works out to about 8.3 billion Btu (2,444 MWh-equivalent) in 2024. Its source EUI of 142.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,201,074 kWh of electricity, 73,481 therms of natural gas and 3,317 thousand gallons of water for the year.
Which law requires 449 Broadway to report its energy use?
449 Broadway 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:B1050:2024). 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 library buildings in Cambridge
Frequently asked questions
What is 449 Broadway's energy grade?
449 Broadway did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 69.4 kBtu/ft².
How much energy does 449 Broadway use?
Its 2024 site energy-use intensity was 69.4 kBtu/ft² (142.5 kBtu/ft² source) across 120,185 sq ft, including 1,201,074 kWh of electricity and 73,481 therms of natural gas.
What are 449 Broadway's carbon emissions?
449 Broadway reported 686 tCO₂e of greenhouse-gas emissions for 2024.
Where is 449 Broadway?
449 Broadway is in Cambridge, Massachusetts. Its coordinates are 42.37400, -71.11050 (latitude, longitude), as published in the Building Energy Use Disclosure Ordinance (BEUDO) file.
How big is 449 Broadway and when was it built?
449 Broadway has 120,185 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2009 as its year built. It is classed as library.
Is 449 Broadway 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, “449 Broadway, Cambridge, Massachusetts — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/cambridge/449-broadway-6fa4a9eb (data as of October 2, 2026).