IBT Annex
Office in Washington, DC, DC · 405 New Jersey Ave NW · 20001
At a glance
IBT Annex is a 77,505-square-foot office building at 405 New Jersey Ave NW in Washington, DC, built in 1955. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 48 out of 100 (grade D), a site energy-use intensity of 71.7 kBtu/ft² and 488 tCO₂e of greenhouse-gas emissions. That score is higher than 14% of the 774 scored office buildings in Washington, DC.
Clean and Affordable Energy Act / BEPS · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 48 (band D) |
| Site EUI | 71.7 kBtu/ft² |
| Source EUI | 200.9 kBtu/ft² |
| GHG emissions | 488 tCO₂e |
| GHG intensity | 6.3 kgCO₂e/ft² |
| Electricity | 1,629,559 kWh |
| Natural gas | 0 therms |
| Water use | 1,516 kgal |
| Gross floor area | 77,505 sq ft |
| Source record | dc:PM3990119:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 48 | -2 | 71.7 kBtu/ft² | 488 tCO₂e |
| 2023 | 50 | +1 | 69.3 kBtu/ft² | 471 tCO₂e |
| 2022 | 49 | +2 | 71.3 kBtu/ft² | 485 tCO₂e |
| 2021 | 47 | +1 | 68.2 kBtu/ft² | 475 tCO₂e |
| 2020 | 46 | +8 | 67.6 kBtu/ft² | 456 tCO₂e |
| 2019 | 38 | -6 | 82.2 kBtu/ft² | 591 tCO₂e |
| 2018 | 44 | -10 | 76.8 kBtu/ft² | 569 tCO₂e |
| 2017 | 54 | -2 | 73.4 kBtu/ft² | 615 tCO₂e |
| 2016 | 56 | -4 | 73.6 kBtu/ft² | 637 tCO₂e |
| 2015 | 60 | +14 | 70.2 kBtu/ft² | 709 tCO₂e |
| 2014 | 46 | 81.8 kBtu/ft² | 827 tCO₂e | |
| 2013 | — | 63.4 kBtu/ft² | 786 tCO₂e |
Compliance context
Clean and Affordable Energy Act / BEPS
DC's Building Energy Performance Standards (BEPS) require buildings below the performance standard to improve over compliance cycles (the first ends December 31, 2026; later cycles run five years), with penalties for buildings that fail to meet their pathway.
Ownership
INTERNATIONAL BROTHERHOOD OF TEAMSTERS
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Location
- Address
- 405 New Jersey Ave NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20001
- Coordinates
- 38.89502, -77.01052
Within ~1 km
Nearby benchmarked buildings
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- Marion Barry Buildingscore 42
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- Station Place Iscore 68
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- Georgetown Lawscore —
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- D.C. Hyatt Regencyscore 83
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See also: most efficient in Washington, DC · biggest emitters
How does IBT Annex compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. IBT Annex's ENERGY STAR score of 48 compares with an average of 70 across the 774 that report a score; it scores higher than 14% of them and lower than 85%. Its site EUI of 71.7 kBtu/ft² is about 29% above the average of 55.6 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 6.3 kgCO₂e/ft² is about 26% above the group average of 5.0 kgCO₂e/ft².
At 77,505 sq ft, it is about 64% below the average floor area of 216,135 sq ft for those buildings. It was built in 1955, 19 years earlier than the group's average year built (1974). 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 IBT Annex's energy performance changed over time?
BuildingCensus holds 12 Washington, DC disclosures for IBT Annex, covering report years 2013–2024. Its ENERGY STAR score went from 46 in 2014 to 48 in 2024 (+2 points); its best year on file was 2015, at 60. Site EUI moved from 63.4 kBtu/ft² (2013) to 71.7 kBtu/ft² (2024), an 13% increase. Reported emissions went from 786 tCO₂e to 488 tCO₂e over the same span (down 38%).
What does an ENERGY STAR score of 48 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 48 means the building performs better than about 48% of its national peers. BuildingCensus bands the score into report-card grades; 48 falls in band D — lowest band (1–54). It sits 27 points below 75, the threshold for ENERGY STAR certification. In Washington, DC, 47% 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. IBT Annex's 71.7 kBtu/ft² across 77,505 sq ft works out to about 5.6 billion Btu (1,629 MWh-equivalent) in 2024. Its source EUI of 200.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,629,559 kWh of electricity, 0 therms of natural gas and 1,516 thousand gallons of water for the year.
Which law requires IBT Annex to report its energy use?
IBT Annex reports under the Clean and Affordable Energy Act / BEPS, the legal basis of Washington, DC's Building Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record dc:PM3990119:2024). DC's Building Energy Performance Standards (BEPS) require buildings below the performance standard to improve over compliance cycles (the first ends December 31, 2026; later cycles run five years), with penalties for buildings that fail to meet their pathway.
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Frequently asked questions
What is IBT Annex's energy grade?
IBT Annex scores 48 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does IBT Annex use?
Its 2024 site energy-use intensity was 71.7 kBtu/ft² (200.9 kBtu/ft² source) across 77,505 sq ft, including 1,629,559 kWh of electricity and 0 therms of natural gas.
What are IBT Annex's carbon emissions?
IBT Annex reported 488 tCO₂e of greenhouse-gas emissions (6.3 kgCO₂e/ft²) for 2024.
Where is IBT Annex?
IBT Annex is at 405 New Jersey Ave NW, in Washington, DC 20001. Its coordinates are 38.89502, -77.01052 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is IBT Annex and when was it built?
IBT Annex has 77,505 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1955 as its year built. It is classed as office.
Is IBT Annex covered by the Clean and Affordable Energy Act / BEPS?
Yes — it appears in the 2024 Building Energy Benchmarking disclosure, which lists the buildings reporting under the Clean and Affordable Energy Act / BEPS.
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About this data
Source: Building Energy Benchmarking (Clean and Affordable Energy Act / BEPS), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “IBT Annex, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/ibt-annex-cceadc89 (data as of July 9, 2026).