1001 Connecticut Avenue
Office in Washington, DC, DC · 1001 Connecticut Avenue, NW · 20036
At a glance
1001 Connecticut Avenue is a 142,750-square-foot office building at 1001 Connecticut Avenue, NW in Washington, DC, built in 1953. In its 2018 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 79 out of 100 (grade B), a site energy-use intensity of 59.9 kBtu/ft² and 778 tCO₂e of greenhouse-gas emissions. That score is higher than 59% of the 774 scored office buildings in Washington, DC.
Clean and Affordable Energy Act / BEPS · reporting year 2018
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 79 (band B) |
| Site EUI | 59.9 kBtu/ft² |
| Source EUI | 136.3 kBtu/ft² |
| GHG emissions | 778 tCO₂e |
| GHG intensity | 5.4 kgCO₂e/ft² |
| Electricity | 1,764,229 kWh |
| Natural gas | 9,476 therms |
| Water use | 3,805 kgal |
| Gross floor area | 142,750 sq ft |
| Source record | dc:PM3354050:2018 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2018latest | 79 | -8 | 59.9 kBtu/ft² | 778 tCO₂e |
| 2017 | 87 | -1 | 64.1 kBtu/ft² | 889 tCO₂e |
| 2016 | 88 | -1 | 55.3 kBtu/ft² | 822 tCO₂e |
| 2015 | 89 | 57.7 kBtu/ft² | 987 tCO₂e | |
| 2014 | — | 50.9 kBtu/ft² | 956 tCO₂e | |
| 2013 | 86 | 70.4 kBtu/ft² | 1,172 tCO₂e | |
| 2012 | — | — | — |
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
1001 CONNECTICUT AVENUE LLC
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Location
- Address
- 1001 Connecticut Avenue, NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20036
- Coordinates
- 38.90300, -77.03906
Within ~1 km
Nearby benchmarked buildings
- Main Complexscore 59
Office · 1,872,507 sq ft
- International Squarescore 56
Office · 1,233,833 sq ft
- Midtown Centerscore 91
Office · 911,093 sq ft
- Lafayette Centrescore 74
Office · 908,482 sq ft
- NGS Headquartersscore 68
Office · 746,237 sq ft
- Northwestern Buildingscore 90
Office · 732,964 sq ft
See also: most efficient in Washington, DC · biggest emitters
How does 1001 Connecticut Avenue compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 1001 Connecticut Avenue's ENERGY STAR score of 79 compares with an average of 70 across the 774 that report a score; it scores higher than 59% of them and lower than 37%. Its site EUI of 59.9 kBtu/ft² is roughly in line with the average of 55.6 kBtu/ft². Its emissions intensity of 5.4 kgCO₂e/ft² is roughly in line with the group average of 5.0 kgCO₂e/ft².
At 142,750 sq ft, it is about 34% below the average floor area of 216,135 sq ft for those buildings. It was built in 1953, 21 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 1001 Connecticut Avenue's energy performance changed over time?
BuildingCensus holds 7 Washington, DC disclosures for 1001 Connecticut Avenue, covering report years 2012–2018. Its ENERGY STAR score went from 86 in 2013 to 79 in 2018 (-7 points); its best year on file was 2015, at 89. Site EUI moved from 70.4 kBtu/ft² (2013) to 59.9 kBtu/ft² (2018), a 15% decrease. Reported emissions went from 1,172 tCO₂e to 778 tCO₂e over the same span (down 34%).
What does an ENERGY STAR score of 79 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 79 means the building performs better than about 79% of its national peers. BuildingCensus bands the score into report-card grades; 79 falls in band B — above median (70–84). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. 1001 Connecticut Avenue's 59.9 kBtu/ft² across 142,750 sq ft works out to about 8.6 billion Btu (2,506 MWh-equivalent) in 2018. Its source EUI of 136.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,764,229 kWh of electricity, 9,476 therms of natural gas and 3,805 thousand gallons of water for the year.
Which law requires 1001 Connecticut Avenue to report its energy use?
1001 Connecticut Avenue 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 2018 disclosure (source record dc:PM3354050:2018). 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
- 0117-0080 (1901 L St)· 141,514 sq ft · score 78 (B)
- 1120 G Street, NW· 141,397 sq ft · EUI 36.5 kBtu/ft²
- 1100 15th Street (DDOE)· 140,482 sq ft · score 78 (B)
- Jemal's Historic Row· 138,889 sq ft · EUI 66.8 kBtu/ft²
- 1600 I Street Corporation· 138,872 sq ft · score 84 (B)
- 1750 H Street· 138,748 sq ft · score 91 (A)
- 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 1001 Connecticut Avenue's energy grade?
1001 Connecticut Avenue scores 79 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2018 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1001 Connecticut Avenue use?
Its 2018 site energy-use intensity was 59.9 kBtu/ft² (136.3 kBtu/ft² source) across 142,750 sq ft, including 1,764,229 kWh of electricity and 9,476 therms of natural gas.
What are 1001 Connecticut Avenue's carbon emissions?
1001 Connecticut Avenue reported 778 tCO₂e of greenhouse-gas emissions (5.4 kgCO₂e/ft²) for 2018.
Where is 1001 Connecticut Avenue?
1001 Connecticut Avenue is at 1001 Connecticut Avenue, NW, in Washington, DC 20036. Its coordinates are 38.90300, -77.03906 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1001 Connecticut Avenue and when was it built?
1001 Connecticut Avenue has 142,750 sq ft of gross floor area, as reported in its 2018 disclosure. The disclosure lists 1953 as its year built. It is classed as office.
Is 1001 Connecticut Avenue covered by the Clean and Affordable Energy Act / BEPS?
Yes — it appears in the 2018 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, “1001 Connecticut Avenue, Washington, DC — 2018 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/1001-connecticut-avenue-1605d8c6 (data as of July 9, 2026).