899 North Capitol Street (Union Square)
Office in Washington, DC, DC · 899 North Capitol Street · 20002
At a glance
899 North Capitol Street (Union Square) is a 312,685-square-foot office building in Washington, DC, built in 1972. In its 2024 Washington, DC benchmarking disclosure it reported a site energy-use intensity of 37.9 kBtu/ft² and 1,041 tCO₂e of greenhouse-gas emissions.
Clean and Affordable Energy Act / BEPS · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 37.9 kBtu/ft² |
| Source EUI | 106.2 kBtu/ft² |
| GHG emissions | 1,041 tCO₂e |
| GHG intensity | 3.3 kgCO₂e/ft² |
| Electricity | 3,476,182 kWh |
| Natural gas | 0 therms |
| Water use | 2,358 kgal |
| Gross floor area | 312,685 sq ft |
| Source record | dc:PM1391419:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 37.9 kBtu/ft² | 1,041 tCO₂e | |
| 2023 | 72 | ±0 | 44.8 kBtu/ft² | 1,248 tCO₂e |
| 2022 | 72 | -6 | 48.5 kBtu/ft² | 1,352 tCO₂e |
| 2021 | 78 | +10 | 49.7 kBtu/ft² | 1,452 tCO₂e |
| 2020 | 68 | -4 | 58.6 kBtu/ft² | 1,762 tCO₂e |
| 2019 | 72 | -1 | 56.0 kBtu/ft² | 1,681 tCO₂e |
| 2018 | 73 | -19 | 55.0 kBtu/ft² | 1,649 tCO₂e |
| 2017 | 92 | +13 | 43.4 kBtu/ft² | 1,509 tCO₂e |
| 2016 | 79 | -4 | 55.9 kBtu/ft² | 2,012 tCO₂e |
| 2015 | 83 | +2 | 51.0 kBtu/ft² | 2,144 tCO₂e |
| 2014 | 81 | 52.9 kBtu/ft² | 2,222 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
US UNION SQUARE DC 899 LLC
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 899 North Capitol Street
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20002
- Coordinates
- 38.90101, -77.00844
Within ~1 km
Nearby benchmarked buildings
- One Judiciary Squarescore 41
Office · 850,354 sq ft
- Marion Barry Buildingscore 42
Office · 850,354 sq ft
- Station Place Iscore 68
Office · 788,412 sq ft
Multifamily Housing · 742,606 sq ft
- Georgetown Lawscore —
Mixed Use Property · 718,476 sq ft
Hotel · 715,075 sq ft
See also: most efficient in Washington, DC · biggest emitters
How does 899 North Capitol Street (Union Square) compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. Its site EUI of 37.9 kBtu/ft² is about 32% below the average of 55.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.3 kgCO₂e/ft² is about 33% below the group average of 5.0 kgCO₂e/ft².
At 312,685 sq ft, it is about 45% above the average floor area of 216,135 sq ft for those buildings. Its 1972 construction date is close to 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 899 North Capitol Street (Union Square)'s energy performance changed over time?
BuildingCensus holds 11 Washington, DC disclosures for 899 North Capitol Street (Union Square), covering report years 2014–2024. Its ENERGY STAR score went from 81 in 2014 to 72 in 2023 (-9 points); its best year on file was 2017, at 92. Site EUI moved from 52.9 kBtu/ft² (2014) to 37.9 kBtu/ft² (2024), a 28% decrease. Reported emissions went from 2,222 tCO₂e to 1,041 tCO₂e over the same span (down 53%).
What does a site EUI of 37.9 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. 899 North Capitol Street (Union Square)'s 37.9 kBtu/ft² across 312,685 sq ft works out to about 11.9 billion Btu (3,473 MWh-equivalent) in 2024. Its source EUI of 106.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,476,182 kWh of electricity, 0 therms of natural gas and 2,358 thousand gallons of water for the year.
Which law requires 899 North Capitol Street (Union Square) to report its energy use?
899 North Capitol Street (Union Square) 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:PM1391419:2024). 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
- 111 Mass Ave· 310,129 sq ft · EUI 25.7 kBtu/ft²
- 901 K Street - Church· 310,106 sq ft · score 78 (B)
- U.S. Coast Guard· 309,954 sq ft · score 88 (A)
- 655 K Street - AAMC· 309,924 sq ft · score 61 (C)
- 1666 K St NW· 309,643 sq ft · score 51 (D)
- CTTWB· 307,566 sq ft · EUI 16.3 kBtu/ft²
- 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 899 North Capitol Street (Union Square)'s energy grade?
899 North Capitol Street (Union Square) did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 37.9 kBtu/ft².
How much energy does 899 North Capitol Street (Union Square) use?
Its 2024 site energy-use intensity was 37.9 kBtu/ft² (106.2 kBtu/ft² source) across 312,685 sq ft, including 3,476,182 kWh of electricity and 0 therms of natural gas.
What are 899 North Capitol Street (Union Square)'s carbon emissions?
899 North Capitol Street (Union Square) reported 1,041 tCO₂e of greenhouse-gas emissions (3.3 kgCO₂e/ft²) for 2024.
Where is 899 North Capitol Street (Union Square)?
899 North Capitol Street (Union Square) is in Washington, DC 20002. Its coordinates are 38.90101, -77.00844 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 899 North Capitol Street (Union Square) and when was it built?
899 North Capitol Street (Union Square) has 312,685 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1972 as its year built. It is classed as office.
Is 899 North Capitol Street (Union Square) 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.
Working with Washington, DC 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 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, “899 North Capitol Street (Union Square), Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/899-north-capitol-street-union-square-51059659 (data as of July 9, 2026).