1901 Pennsylvania Ave (py21)
Office in Washington, DC, DC · 1901 Pennsylvania Ave · 20006
At a glance
1901 Pennsylvania Ave (py21) is a 110,731-square-foot office building in Washington, DC, built in 1960. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 69 out of 100 (grade C), a site energy-use intensity of 56.7 kBtu/ft² and 512 tCO₂e of greenhouse-gas emissions. That score is higher than 34% 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 | 69 (band C) |
| Site EUI | 56.7 kBtu/ft² |
| Source EUI | 140.7 kBtu/ft² |
| GHG emissions | 512 tCO₂e |
| GHG intensity | 4.6 kgCO₂e/ft² |
| Electricity | 1,504,918 kWh |
| Natural gas | 11,491 therms |
| Water use | 1,900 kgal |
| Gross floor area | 110,731 sq ft |
| Source record | dc:PM1368706:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 69 | -6 | 56.7 kBtu/ft² | 512 tCO₂e |
| 2023 | 75 | ±0 | 54.3 kBtu/ft² | 488 tCO₂e |
| 2022 | 75 | -4 | 59.6 kBtu/ft² | 511 tCO₂e |
| 2021 | 79 | +5 | 62.3 kBtu/ft² | — |
| 2020 | 74 | -1 | 54.8 kBtu/ft² | — |
| 2019 | 75 | -7 | 65.9 kBtu/ft² | — |
| 2018 | 82 | -12 | 57.6 kBtu/ft² | — |
| 2017 | 94 | +2 | 43.2 kBtu/ft² | 484 tCO₂e |
| 2016 | 92 | +4 | 50.6 kBtu/ft² | 560 tCO₂e |
| 2015 | 88 | +12 | 56.3 kBtu/ft² | 725 tCO₂e |
| 2014 | 76 | 62.2 kBtu/ft² | 800 tCO₂e | |
| 2013 | — | 54.1 kBtu/ft² | 693 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
1901 PENNSYLVANIA VENTURE LLC
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 1901 Pennsylvania Ave
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20006
- Coordinates
- 38.90068, -77.04380
Within ~1 km
Nearby benchmarked buildings
- BEPS1 - Foggy Bottom Campusscore —
Mixed Use Property · 5,533,789 sq ft
- Main Complexscore 59
Office · 1,872,507 sq ft
- International Squarescore 56
Office · 1,233,833 sq ft
- Ross Hall Groupscore —
College/University · 1,047,627 sq ft
- Columbia Plaza All Bldgsscore 30
Multifamily Housing · 942,990 sq ft
- Lafayette Centrescore 74
Office · 908,482 sq ft
See also: most efficient in Washington, DC · biggest emitters
How does 1901 Pennsylvania Ave (py21) compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 1901 Pennsylvania Ave (py21)'s ENERGY STAR score of 69 compares with an average of 70 across the 774 that report a score; it scores higher than 34% of them and lower than 64%. Its site EUI of 56.7 kBtu/ft² is roughly in line with the average of 55.6 kBtu/ft². Its emissions intensity of 4.6 kgCO₂e/ft² is roughly in line with the group average of 5.0 kgCO₂e/ft².
At 110,731 sq ft, it is about half of the average floor area of 216,135 sq ft for those buildings. It was built in 1960, 14 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 1901 Pennsylvania Ave (py21)'s energy performance changed over time?
BuildingCensus holds 12 Washington, DC disclosures for 1901 Pennsylvania Ave (py21), covering report years 2013–2024. Its ENERGY STAR score went from 76 in 2014 to 69 in 2024 (-7 points); its best year on file was 2017, at 94. Site EUI moved from 54.1 kBtu/ft² (2013) to 56.7 kBtu/ft² (2024), an 5% increase. Reported emissions went from 693 tCO₂e to 512 tCO₂e over the same span (down 26%).
What does an ENERGY STAR score of 69 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 69 means the building performs better than about 69% of its national peers. BuildingCensus bands the score into report-card grades; 69 falls in band C — below median (55–69). It sits 6 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. 1901 Pennsylvania Ave (py21)'s 56.7 kBtu/ft² across 110,731 sq ft works out to about 6.3 billion Btu (1,840 MWh-equivalent) in 2024. Its source EUI of 140.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,504,918 kWh of electricity, 11,491 therms of natural gas and 1,900 thousand gallons of water for the year.
Which law requires 1901 Pennsylvania Ave (py21) to report its energy use?
1901 Pennsylvania Ave (py21) 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:PM1368706:2024). 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
- Washington DC Corporate Center· 110,388 sq ft · score 71 (B)
- Meitnerium, LLC· 110,129 sq ft · score 39 (D)
- Wonder Plaza· 110,000 sq ft · score 16 (D)
- 1701 Rhode Island· 109,618 sq ft · score 95 (A)
- Main Building, 0201 17th St. NW· 109,609 sq ft · score 66 (C)
- 1900 M Street· 109,568 sq ft · score 84 (B)
- 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 1901 Pennsylvania Ave (py21)'s energy grade?
1901 Pennsylvania Ave (py21) scores 69 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1901 Pennsylvania Ave (py21) use?
Its 2024 site energy-use intensity was 56.7 kBtu/ft² (140.7 kBtu/ft² source) across 110,731 sq ft, including 1,504,918 kWh of electricity and 11,491 therms of natural gas.
What are 1901 Pennsylvania Ave (py21)'s carbon emissions?
1901 Pennsylvania Ave (py21) reported 512 tCO₂e of greenhouse-gas emissions (4.6 kgCO₂e/ft²) for 2024.
Where is 1901 Pennsylvania Ave (py21)?
1901 Pennsylvania Ave (py21) is in Washington, DC 20006. Its coordinates are 38.90068, -77.04380 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1901 Pennsylvania Ave (py21) and when was it built?
1901 Pennsylvania Ave (py21) has 110,731 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1960 as its year built. It is classed as office.
Is 1901 Pennsylvania Ave (py21) 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, “1901 Pennsylvania Ave (py21), Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/1901-pennsylvania-ave-py21-eff64700 (data as of July 9, 2026).