51 N Street NE
Office in Washington, DC, DC · 51 N Street, NE · 20002
At a glance
51 N Street NE is a 136,270-square-foot office building at 51 N Street, NE in Washington, DC, built in 1979. In its 2015 Washington, DC benchmarking disclosure it reported a site energy-use intensity of 11.7 kBtu/ft² and 213 tCO₂e of greenhouse-gas emissions.
Clean and Affordable Energy Act / BEPS · reporting year 2015
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 11.7 kBtu/ft² |
| Source EUI | 36.7 kBtu/ft² |
| GHG emissions | 213 tCO₂e |
| GHG intensity | 1.6 kgCO₂e/ft² |
| Electricity | 466,502 kWh |
| Natural gas | 0 therms |
| Water use | 109 kgal |
| Gross floor area | 136,270 sq ft |
| Source record | dc:PM3353543:2015 |
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
51 N RESIDENTIAL LLC
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Location
- Address
- 51 N Street, NE
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20002
- Coordinates
- 38.90696, -77.00695
Within ~1 km
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See also: most efficient in Washington, DC · biggest emitters
How does 51 N Street NE 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 11.7 kBtu/ft² is about 79% 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 1.6 kgCO₂e/ft² is about 68% below the group average of 5.0 kgCO₂e/ft².
At 136,270 sq ft, it is about 37% below the average floor area of 216,135 sq ft for those buildings. It was built in 1979, 5 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.
What does a site EUI of 11.7 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. 51 N Street NE's 11.7 kBtu/ft² across 136,270 sq ft works out to about 1.6 billion Btu (467 MWh-equivalent) in 2015. Its source EUI of 36.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 466,502 kWh of electricity, 0 therms of natural gas and 109 thousand gallons of water for the year.
Which law requires 51 N Street NE to report its energy use?
51 N Street NE 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 2015 disclosure (source record dc:PM3353543:2015). 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
- 900 G Street NW· 135,933 sq ft · score 70 (B)
- Gelman Building (gl124)· 135,863 sq ft · score 63 (C)
- 1300 19th St NW· 135,155 sq ft · score 77 (B)
- 1300 Connecticut Avenue NW· 134,864 sq ft · score 64 (C)
- 500 First Street NW· 134,435 sq ft · score 60 (C)
- 2033 K Street, NW· 134,212 sq ft · EUI 54.2 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 51 N Street NE's energy grade?
51 N Street NE did not report an ENERGY STAR score in its 2015 disclosure, but its site energy-use intensity was 11.7 kBtu/ft².
How much energy does 51 N Street NE use?
Its 2015 site energy-use intensity was 11.7 kBtu/ft² (36.7 kBtu/ft² source) across 136,270 sq ft, including 466,502 kWh of electricity and 0 therms of natural gas.
What are 51 N Street NE's carbon emissions?
51 N Street NE reported 213 tCO₂e of greenhouse-gas emissions (1.6 kgCO₂e/ft²) for 2015.
Where is 51 N Street NE?
51 N Street NE is at 51 N Street, NE, in Washington, DC 20002. Its coordinates are 38.90696, -77.00695 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 51 N Street NE and when was it built?
51 N Street NE has 136,270 sq ft of gross floor area, as reported in its 2015 disclosure. The disclosure lists 1979 as its year built. It is classed as office.
Is 51 N Street NE covered by the Clean and Affordable Energy Act / BEPS?
Yes — it appears in the 2015 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, “51 N Street NE, Washington, DC — 2015 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/51-n-street-ne-1f5840dd (data as of July 9, 2026).