251 Massachusetts Avenue LLC
Office in Washington, DC, DC · 251 H St. NW · 20001
At a glance
251 Massachusetts Avenue LLC is a 93,877-square-foot office building at 251 H St. NW in Washington, DC, built in 2008. In its 2016 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 20 out of 100 (grade D), a site energy-use intensity of 91.5 kBtu/ft² and 870 tCO₂e of greenhouse-gas emissions. That score is higher than 3% of the 774 scored office buildings in Washington, DC.
Clean and Affordable Energy Act / BEPS · reporting year 2016
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 20 (band D) |
| Site EUI | 91.5 kBtu/ft² |
| Source EUI | 256.2 kBtu/ft² |
| GHG emissions | 870 tCO₂e |
| GHG intensity | 9.3 kgCO₂e/ft² |
| Electricity | 2,517,773 kWh |
| Natural gas | 0 therms |
| Water use | 1,123 kgal |
| Gross floor area | 93,877 sq ft |
| Source record | dc:PM4377822:2016 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2016latest | 20 | -10 | 91.5 kBtu/ft² | 870 tCO₂e |
| 2015 | 30 | 92.1 kBtu/ft² | 1,157 tCO₂e | |
| 2014 | — | 95.8 kBtu/ft² | 1,204 tCO₂e | |
| 2013 | — | 84.3 kBtu/ft² | 1,059 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
251 MASSACHUSETTS AVENUE LLC
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 251 H St. NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20001
- Coordinates
- 38.90047, -77.01467
Within ~1 km
Nearby benchmarked buildings
- 616 E St.score —
Multifamily Housing · 1,150,961 sq ft
- Capital One Arenascore —
Indoor Arena · 856,840 sq ft
- Marion Barry Buildingscore 42
Office · 850,354 sq ft
- One Judiciary Squarescore 41
Office · 850,354 sq ft
- H. Carl Moultrie Bldgscore —
Courthouse · 741,107 sq ft
- Georgetown Lawscore —
Mixed Use Property · 718,476 sq ft
See also: most efficient in Washington, DC · biggest emitters
How does 251 Massachusetts Avenue LLC compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 251 Massachusetts Avenue LLC's ENERGY STAR score of 20 compares with an average of 70 across the 774 that report a score; it scores higher than 3% of them and lower than 96%. Its site EUI of 91.5 kBtu/ft² is about 65% 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 9.3 kgCO₂e/ft² is about 86% above the group average of 5.0 kgCO₂e/ft².
At 93,877 sq ft, it is about 57% below the average floor area of 216,135 sq ft for those buildings. It was built in 2008, 34 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 251 Massachusetts Avenue LLC's energy performance changed over time?
BuildingCensus holds 4 Washington, DC disclosures for 251 Massachusetts Avenue LLC, covering report years 2013–2016. Its ENERGY STAR score went from 30 in 2015 to 20 in 2016 (-10 points); its best year on file was 2015, at 30. Site EUI moved from 84.3 kBtu/ft² (2013) to 91.5 kBtu/ft² (2016), an 9% increase. Reported emissions went from 1,059 tCO₂e to 870 tCO₂e over the same span (down 18%).
What does an ENERGY STAR score of 20 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 20 means the building performs better than about 20% of its national peers. BuildingCensus bands the score into report-card grades; 20 falls in band D — lowest band (1–54). It sits 55 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. 251 Massachusetts Avenue LLC's 91.5 kBtu/ft² across 93,877 sq ft works out to about 8.6 billion Btu (2,517 MWh-equivalent) in 2016. Its source EUI of 256.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,517,773 kWh of electricity, 0 therms of natural gas and 1,123 thousand gallons of water for the year.
Which law requires 251 Massachusetts Avenue LLC to report its energy use?
251 Massachusetts Avenue LLC 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 2016 disclosure (source record dc:PM4377822:2016). 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
- Daniel A. D'Aniello Building· 92,629 sq ft · score 70 (B)
- 1600 K St., NW· 92,529 sq ft · EUI 62.0 kBtu/ft²
- Jemal's TEB - 1900 W Pl NE· 92,432 sq ft · EUI 16.3 kBtu/ft²
- 5100 Wisconsin Ave.· 92,308 sq ft · score 46 (D)
- 111 K Street· 92,103 sq ft · EUI 41.5 kBtu/ft²
- 1300 L Street· 92,054 sq ft · score 56 (C)
- 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 251 Massachusetts Avenue LLC's energy grade?
251 Massachusetts Avenue LLC scores 20 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2016 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 251 Massachusetts Avenue LLC use?
Its 2016 site energy-use intensity was 91.5 kBtu/ft² (256.2 kBtu/ft² source) across 93,877 sq ft, including 2,517,773 kWh of electricity and 0 therms of natural gas.
What are 251 Massachusetts Avenue LLC's carbon emissions?
251 Massachusetts Avenue LLC reported 870 tCO₂e of greenhouse-gas emissions (9.3 kgCO₂e/ft²) for 2016.
Where is 251 Massachusetts Avenue LLC?
251 Massachusetts Avenue LLC is at 251 H St. NW, in Washington, DC 20001. Its coordinates are 38.90047, -77.01467 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 251 Massachusetts Avenue LLC and when was it built?
251 Massachusetts Avenue LLC has 93,877 sq ft of gross floor area, as reported in its 2016 disclosure. The disclosure lists 2008 as its year built. It is classed as office.
Is 251 Massachusetts Avenue LLC covered by the Clean and Affordable Energy Act / BEPS?
Yes — it appears in the 2016 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, “251 Massachusetts Avenue LLC, Washington, DC — 2016 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/251-massachusetts-avenue-llc-81310f56 (data as of July 9, 2026).