122 C Street: 122 C Street Northwest
Office in Washington, DC, DC · 122 C Street Northwest · 20001
At a glance
122 C Street: 122 C Street Northwest is a 123,209-square-foot office building in Washington, DC, built in 1968. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 81 out of 100 (grade B), a site energy-use intensity of 62.4 kBtu/ft² and 539 tCO₂e of greenhouse-gas emissions. That score is higher than 66% 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 | 81 (band B) |
| Site EUI | 62.4 kBtu/ft² |
| Source EUI | 119.0 kBtu/ft² |
| GHG emissions | 539 tCO₂e |
| GHG intensity | 4.4 kgCO₂e/ft² |
| Electricity | 1,102,273 kWh |
| Natural gas | 39,291 therms |
| Water use | 968 kgal |
| Gross floor area | 123,209 sq ft |
| Source record | dc:PM6182215:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 81 | +1 | 62.4 kBtu/ft² | 539 tCO₂e |
| 2023 | 80 | +2 | 62.1 kBtu/ft² | 511 tCO₂e |
| 2022 | 78 | +1 | 62.8 kBtu/ft² | 606 tCO₂e |
| 2021 | 77 | -1 | 64.5 kBtu/ft² | 640 tCO₂e |
| 2020 | 78 | +2 | 60.3 kBtu/ft² | 552 tCO₂e |
| 2019 | 76 | 60.9 kBtu/ft² | 646 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
ZG 122 C STREET LLC
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Location
- Address
- 122 C Street Northwest
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20001
- Coordinates
- 38.89333, -77.01302
Within ~1 km
Nearby benchmarked buildings
- One Judiciary Squarescore 41
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- Marion Barry Buildingscore 42
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- H. Carl Moultrie Bldgscore —
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- Georgetown Lawscore —
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- D.C. Hyatt Regencyscore 83
Hotel · 715,000 sq ft
See also: most efficient in Washington, DC · biggest emitters
How does 122 C Street: 122 C Street Northwest compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 122 C Street: 122 C Street Northwest's ENERGY STAR score of 81 compares with an average of 70 across the 774 that report a score; it scores higher than 66% of them and lower than 30%. Its site EUI of 62.4 kBtu/ft² is about 12% 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 4.4 kgCO₂e/ft² is about 13% below the group average of 5.0 kgCO₂e/ft².
At 123,209 sq ft, it is about 43% below the average floor area of 216,135 sq ft for those buildings. It was built in 1968, 6 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 122 C Street: 122 C Street Northwest's energy performance changed over time?
BuildingCensus holds 6 Washington, DC disclosures for 122 C Street: 122 C Street Northwest, covering report years 2019–2024. Its ENERGY STAR score went from 76 in 2019 to 81 in 2024 (+5 points). Site EUI moved from 60.9 kBtu/ft² (2019) to 62.4 kBtu/ft² (2024), an 2% increase. Reported emissions went from 646 tCO₂e to 539 tCO₂e over the same span (down 17%).
What does an ENERGY STAR score of 81 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 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 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 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. 122 C Street: 122 C Street Northwest's 62.4 kBtu/ft² across 123,209 sq ft works out to about 7.7 billion Btu (2,253 MWh-equivalent) in 2024. Its source EUI of 119.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,102,273 kWh of electricity, 39,291 therms of natural gas and 968 thousand gallons of water for the year.
Which law requires 122 C Street: 122 C Street Northwest to report its energy use?
122 C Street: 122 C Street Northwest 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:PM6182215:2024). 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.
More office buildings in Washington, DC
- 3600 NY Properties LLC· 123,000 sq ft · score 62 (C)
- 1020 19th Street: 1020 19th Street Northwest· 122,865 sq ft · EUI 36.5 kBtu/ft²
- 1900 L Street: 1900 L Street Northwest· 122,148 sq ft · score 81 (B)
- AIA Building· 121,470 sq ft · score 68 (C)
- NBL Associates· 120,838 sq ft · score 77 (B)
- 1120 19th Street, NW· 120,751 sq ft · score 63 (C)
- Office buildings in Washington, DC· 899 benchmarked
- All Washington, DC benchmarked buildings· Clean and Affordable Energy Act / BEPS
- Most efficient large buildings in Washington, DC
- Least efficient large buildings in Washington, DC
- Biggest emitters in Washington, DC
Frequently asked questions
What is 122 C Street: 122 C Street Northwest's energy grade?
122 C Street: 122 C Street Northwest scores 81 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 122 C Street: 122 C Street Northwest use?
Its 2024 site energy-use intensity was 62.4 kBtu/ft² (119.0 kBtu/ft² source) across 123,209 sq ft, including 1,102,273 kWh of electricity and 39,291 therms of natural gas.
What are 122 C Street: 122 C Street Northwest's carbon emissions?
122 C Street: 122 C Street Northwest reported 539 tCO₂e of greenhouse-gas emissions (4.4 kgCO₂e/ft²) for 2024.
Where is 122 C Street: 122 C Street Northwest?
122 C Street: 122 C Street Northwest is in Washington, DC 20001. Its coordinates are 38.89333, -77.01302 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 122 C Street: 122 C Street Northwest and when was it built?
122 C Street: 122 C Street Northwest has 123,209 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1968 as its year built. It is classed as office.
Is 122 C Street: 122 C Street Northwest 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, “122 C Street: 122 C Street Northwest, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/122-c-street-122-c-street-northwest-d4637e9b (data as of July 9, 2026).