51 Louisiana Ave. NW
Office in Washington, DC, DC · 20001
At a glance
51 Louisiana Ave. NW is a 205,580-square-foot office building in Washington, DC, built in 1936. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 70 out of 100 (grade B), a site energy-use intensity of 68.7 kBtu/ft² and 1,240 tCO₂e of greenhouse-gas emissions. That score is higher than 36% 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 | 70 (band B) |
| Site EUI | 68.7 kBtu/ft² |
| Source EUI | 192.4 kBtu/ft² |
| GHG emissions | 1,240 tCO₂e |
| GHG intensity | 6.0 kgCO₂e/ft² |
| Electricity | 4,139,448 kWh |
| Natural gas | 0 therms |
| Water use | 3,655 kgal |
| Gross floor area | 205,580 sq ft |
| Source record | dc:PM1707454:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 70 | +1 | 68.7 kBtu/ft² | 1,240 tCO₂e |
| 2023 | 69 | -1 | 68.5 kBtu/ft² | 1,266 tCO₂e |
| 2022 | 70 | -4 | 68.9 kBtu/ft² | 1,235 tCO₂e |
| 2021 | 74 | -3 | 63.5 kBtu/ft² | 1,213 tCO₂e |
| 2020 | 77 | +44 | 57.0 kBtu/ft² | 1,121 tCO₂e |
| 2019 | 33 | ±0 | 115.4 kBtu/ft² | 2,202 tCO₂e |
| 2018 | 33 | -11 | 115.6 kBtu/ft² | 2,274 tCO₂e |
| 2017 | 44 | +2 | 111.5 kBtu/ft² | 2,542 tCO₂e |
| 2016 | 42 | +6 | 115.3 kBtu/ft² | 2,718 tCO₂e |
| 2015 | 36 | +1 | 122.7 kBtu/ft² | 3,378 tCO₂e |
| 2014 | 35 | +3 | 124.1 kBtu/ft² | 3,414 tCO₂e |
| 2013 | 32 | -2 | 128.0 kBtu/ft² | 3,333 tCO₂e |
| 2012 | 34 | 131.0 kBtu/ft² | 3,411 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
AMSQ LP
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 51 Louisiana Ave. NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20001
- Coordinates
- 38.89405, -77.01145
Within ~1 km
Nearby benchmarked buildings
- Marion Barry Buildingscore 42
Office · 850,354 sq ft
- One Judiciary Squarescore 41
Office · 850,354 sq ft
- Station Place Iscore 68
Office · 788,412 sq ft
- H. Carl Moultrie Bldgscore —
Courthouse · 741,107 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 51 Louisiana Ave. NW compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 51 Louisiana Ave. NW's ENERGY STAR score of 70 compares with an average of 70 across the 774 that report a score; it scores higher than 36% of them and lower than 62%. Its site EUI of 68.7 kBtu/ft² is about 24% 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 6.0 kgCO₂e/ft² is about 21% above the group average of 5.0 kgCO₂e/ft².
At 205,580 sq ft, it is roughly in line with the average floor area of 216,135 sq ft for those buildings. It was built in 1936, 38 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 51 Louisiana Ave. NW's energy performance changed over time?
BuildingCensus holds 13 Washington, DC disclosures for 51 Louisiana Ave. NW, covering report years 2012–2024. Its ENERGY STAR score went from 34 in 2012 to 70 in 2024 (+36 points); its best year on file was 2020, at 77. Site EUI moved from 131.0 kBtu/ft² (2012) to 68.7 kBtu/ft² (2024), a 48% decrease. Reported emissions went from 3,411 tCO₂e to 1,240 tCO₂e over the same span (down 64%).
What does an ENERGY STAR score of 70 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 70 means the building performs better than about 70% of its national peers. BuildingCensus bands the score into report-card grades; 70 falls in band B — above median (70–84). It sits 5 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. 51 Louisiana Ave. NW's 68.7 kBtu/ft² across 205,580 sq ft works out to about 14.1 billion Btu (4,139 MWh-equivalent) in 2024. Its source EUI of 192.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 4,139,448 kWh of electricity, 0 therms of natural gas and 3,655 thousand gallons of water for the year.
Which law requires 51 Louisiana Ave. NW to report its energy use?
51 Louisiana Ave. NW 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:PM1707454:2024). 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
- 429 L'Enfant Plaza (L'Enfant Plaza Retail)· 203,729 sq ft · EUI 38.0 kBtu/ft²
- 499 S Capitol Street SW - Washington· 203,031 sq ft · score 56 (C)
- 1201 M Street· 202,273 sq ft · score 95 (A)
- 1445 New York· 200,913 sq ft · score 90 (A)
- US Chamber of Commerce· 200,891 sq ft · score 82 (B)
- 4250 Connecticut Ave NW· 200,761 sq ft
- 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 Louisiana Ave. NW's energy grade?
51 Louisiana Ave. NW scores 70 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 51 Louisiana Ave. NW use?
Its 2024 site energy-use intensity was 68.7 kBtu/ft² (192.4 kBtu/ft² source) across 205,580 sq ft, including 4,139,448 kWh of electricity and 0 therms of natural gas.
What are 51 Louisiana Ave. NW's carbon emissions?
51 Louisiana Ave. NW reported 1,240 tCO₂e of greenhouse-gas emissions (6.0 kgCO₂e/ft²) for 2024.
Where is 51 Louisiana Ave. NW?
51 Louisiana Ave. NW is in Washington, DC 20001. Its coordinates are 38.89405, -77.01145 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 51 Louisiana Ave. NW and when was it built?
51 Louisiana Ave. NW has 205,580 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1936 as its year built. It is classed as office.
Is 51 Louisiana Ave. NW 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, “51 Louisiana Ave. NW, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/51-louisiana-ave-nw-fc13c329 (data as of July 9, 2026).