370 L'Enfant Promenade
Office in Washington, DC, DC · 901 D Street, SW · 20024
At a glance
370 L'Enfant Promenade is a 407,321-square-foot office building at 901 D Street, SW in Washington, DC, built in 1987. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 72 out of 100 (grade B), a site energy-use intensity of 63.2 kBtu/ft² and 2,123 tCO₂e of greenhouse-gas emissions. That score is higher than 41% 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 | 72 (band B) |
| Site EUI | 63.2 kBtu/ft² |
| Source EUI | 160.0 kBtu/ft² |
| GHG emissions | 2,123 tCO₂e |
| GHG intensity | 5.2 kgCO₂e/ft² |
| Electricity | 6,381,747 kWh |
| Natural gas | 39,869 therms |
| Water use | 3,394 kgal |
| Gross floor area | 407,321 sq ft |
| Source record | dc:PM6254160:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 72 | ±0 | 63.2 kBtu/ft² | 2,123 tCO₂e |
| 2023 | 72 | ±0 | 62.9 kBtu/ft² | 2,157 tCO₂e |
| 2022 | 72 | +8 | 64.8 kBtu/ft² | 2,092 tCO₂e |
| 2021 | 64 | -4 | 66.2 kBtu/ft² | 2,160 tCO₂e |
| 2020 | 68 | -4 | 64.5 kBtu/ft² | 2,092 tCO₂e |
| 2019 | 72 | -5 | 78.0 kBtu/ft² | 2,637 tCO₂e |
| 2018 | 77 | -19 | 67.5 kBtu/ft² | 2,393 tCO₂e |
| 2017 | 96 | 41.9 kBtu/ft² | 1,810 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
370 L ENFANT OWNER LLC
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Location
- Address
- 901 D Street, SW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20024
- Coordinates
- 38.88514, -77.02469
Within ~1 km
Nearby benchmarked buildings
- Constitution Centerscore 83
Office · 1,582,262 sq ft
- Portals IIscore 86
Office · 674,936 sq ft
- Waterside Towers and Townhomesscore 81
Multifamily Housing · 674,080 sq ft
- The Channel (lh71)score —
Multifamily Housing · 603,003 sq ft
- Capital Galleryscore 74
Office · 572,811 sq ft
- 670 Mainescore 69
Office · 571,109 sq ft
See also: most efficient in Washington, DC · biggest emitters
How does 370 L'Enfant Promenade compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 370 L'Enfant Promenade's ENERGY STAR score of 72 compares with an average of 70 across the 774 that report a score; it scores higher than 41% of them and lower than 57%. Its site EUI of 63.2 kBtu/ft² is about 14% 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 5.2 kgCO₂e/ft² is roughly in line with the group average of 5.0 kgCO₂e/ft².
At 407,321 sq ft, it is about 88% above the average floor area of 216,135 sq ft for those buildings. It was built in 1987, 13 years later 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 370 L'Enfant Promenade's energy performance changed over time?
BuildingCensus holds 8 Washington, DC disclosures for 370 L'Enfant Promenade, covering report years 2017–2024. Its ENERGY STAR score went from 96 in 2017 to 72 in 2024 (-24 points); its best year on file was 2017, at 96. Site EUI moved from 41.9 kBtu/ft² (2017) to 63.2 kBtu/ft² (2024), an 51% increase. Reported emissions went from 1,810 tCO₂e to 2,123 tCO₂e over the same span (up 17%).
What does an ENERGY STAR score of 72 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 72 means the building performs better than about 72% of its national peers. BuildingCensus bands the score into report-card grades; 72 falls in band B — above median (70–84). It sits 3 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. 370 L'Enfant Promenade's 63.2 kBtu/ft² across 407,321 sq ft works out to about 25.7 billion Btu (7,544 MWh-equivalent) in 2024. Its source EUI of 160.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 6,381,747 kWh of electricity, 39,869 therms of natural gas and 3,394 thousand gallons of water for the year.
Which law requires 370 L'Enfant Promenade to report its energy use?
370 L'Enfant Promenade 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:PM6254160:2024). 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
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Frequently asked questions
What is 370 L'Enfant Promenade's energy grade?
370 L'Enfant Promenade scores 72 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 370 L'Enfant Promenade use?
Its 2024 site energy-use intensity was 63.2 kBtu/ft² (160.0 kBtu/ft² source) across 407,321 sq ft, including 6,381,747 kWh of electricity and 39,869 therms of natural gas.
What are 370 L'Enfant Promenade's carbon emissions?
370 L'Enfant Promenade reported 2,123 tCO₂e of greenhouse-gas emissions (5.2 kgCO₂e/ft²) for 2024.
Where is 370 L'Enfant Promenade?
370 L'Enfant Promenade is at 901 D Street, SW, in Washington, DC 20024. Its coordinates are 38.88514, -77.02469 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 370 L'Enfant Promenade and when was it built?
370 L'Enfant Promenade has 407,321 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1987 as its year built. It is classed as office.
Is 370 L'Enfant Promenade 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, “370 L'Enfant Promenade, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/370-l-enfant-promenade-19fde90d (data as of July 9, 2026).