1015 15th Street/Blackrock
Office in Washington, DC, DC · 1015 15th Street, NW · 20005
At a glance
1015 15th Street/Blackrock is a 198,868-square-foot office building at 1015 15th Street, NW in Washington, DC, built in 1979. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 72 out of 100 (grade B), a site energy-use intensity of 43.9 kBtu/ft² and 760 tCO₂e of greenhouse-gas emissions. That score is higher than 41% 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 | 72 (band B) |
| Site EUI | 43.9 kBtu/ft² |
| Source EUI | 121.3 kBtu/ft² |
| GHG emissions | 760 tCO₂e |
| GHG intensity | 3.8 kgCO₂e/ft² |
| Electricity | 2,507,366 kWh |
| Natural gas | 1,669 therms |
| Water use | 3,633 kgal |
| Gross floor area | 198,868 sq ft |
| Source record | dc:PM4129771:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 72 | -5 | 43.9 kBtu/ft² | 760 tCO₂e |
| 2023 | 77 | -2 | 44.0 kBtu/ft² | 776 tCO₂e |
| 2022 | 79 | +3 | 42.6 kBtu/ft² | 730 tCO₂e |
| 2021 | 76 | -6 | 44.6 kBtu/ft² | — |
| 2020 | 82 | +6 | 42.3 kBtu/ft² | — |
| 2019 | 76 | +2 | 55.9 kBtu/ft² | — |
| 2018 | 74 | 57.8 kBtu/ft² | — |
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
1015 15TH STREET DC LLC
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Location
- Address
- 1015 15th Street, NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20005
- Coordinates
- 38.90280, -77.03431
Within ~1 km
Nearby benchmarked buildings
- Midtown Centerscore 91
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- Hyatt Grand Washington DCscore 67
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- 1300 Buildingscore 95
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- NGS Headquartersscore 68
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See also: most efficient in Washington, DC · biggest emitters
How does 1015 15th Street/Blackrock compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 1015 15th Street/Blackrock's ENERGY STAR score of 72 compares with an average of 70 across the 774 that report a score; it scores higher than 41% of them and lower than 57%. Its site EUI of 43.9 kBtu/ft² is about 21% 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 3.8 kgCO₂e/ft² is about 24% below the group average of 5.0 kgCO₂e/ft².
At 198,868 sq ft, it is roughly in line with 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.
How has 1015 15th Street/Blackrock's energy performance changed over time?
BuildingCensus holds 7 Washington, DC disclosures for 1015 15th Street/Blackrock, covering report years 2018–2024. Its ENERGY STAR score went from 74 in 2018 to 72 in 2024 (-2 points); its best year on file was 2020, at 82. Site EUI moved from 57.8 kBtu/ft² (2018) to 43.9 kBtu/ft² (2024), a 24% decrease. Reported emissions went from 730 tCO₂e to 760 tCO₂e over the same span (up 4%).
What does an ENERGY STAR score of 72 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 72 means the building performs better than about 72% of its national peers. BuildingCensus bands the score into report-card grades; 72 falls in band B — above median (70–84). It sits 3 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. 1015 15th Street/Blackrock's 43.9 kBtu/ft² across 198,868 sq ft works out to about 8.7 billion Btu (2,559 MWh-equivalent) in 2024. Its source EUI of 121.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,507,366 kWh of electricity, 1,669 therms of natural gas and 3,633 thousand gallons of water for the year.
Which law requires 1015 15th Street/Blackrock to report its energy use?
1015 15th Street/Blackrock 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:PM4129771:2024). 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
- Jemal's Takoma Park, LLC· 198,799 sq ft · score 74 (B)
- The CoStar Group Building· 198,452 sq ft · score 71 (B)
- The Southern Building· 198,331 sq ft · score 73 (B)
- 600 13th Street #2· 198,218 sq ft · score 77 (B)
- 733 Tenth LL, LLC· 197,935 sq ft · score 67 (C)
- Connecticut Building· 197,801 sq ft · score 85 (A)
- Office buildings in Washington, DC· 899 benchmarked
- All Washington, DC benchmarked buildings· Clean and Affordable Energy Act / BEPS
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- Biggest emitters in Washington, DC
Frequently asked questions
What is 1015 15th Street/Blackrock's energy grade?
1015 15th Street/Blackrock scores 72 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 1015 15th Street/Blackrock use?
Its 2024 site energy-use intensity was 43.9 kBtu/ft² (121.3 kBtu/ft² source) across 198,868 sq ft, including 2,507,366 kWh of electricity and 1,669 therms of natural gas.
What are 1015 15th Street/Blackrock's carbon emissions?
1015 15th Street/Blackrock reported 760 tCO₂e of greenhouse-gas emissions (3.8 kgCO₂e/ft²) for 2024.
Where is 1015 15th Street/Blackrock?
1015 15th Street/Blackrock is at 1015 15th Street, NW, in Washington, DC 20005. Its coordinates are 38.90280, -77.03431 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1015 15th Street/Blackrock and when was it built?
1015 15th Street/Blackrock has 198,868 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1979 as its year built. It is classed as office.
Is 1015 15th Street/Blackrock 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, “1015 15th Street/Blackrock, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/1015-15th-street-blackrock-fc55635d (data as of July 9, 2026).