1133 Connecticut Ave
Office in Washington, DC, DC · 1133 Connecticut Ave NW · 20036
At a glance
1133 Connecticut Ave is a 190,958-square-foot office building at 1133 Connecticut Ave NW in Washington, DC, built in 1988. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 71 out of 100 (grade B), a site energy-use intensity of 43.8 kBtu/ft² and 734 tCO₂e of greenhouse-gas emissions. That score is higher than 38% 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 | 71 (band B) |
| Site EUI | 43.8 kBtu/ft² |
| Source EUI | 122.7 kBtu/ft² |
| GHG emissions | 734 tCO₂e |
| GHG intensity | 3.8 kgCO₂e/ft² |
| Electricity | 2,451,884 kWh |
| Natural gas | 0 therms |
| Water use | 2,562 kgal |
| Gross floor area | 190,958 sq ft |
| Source record | dc:PM2962687:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 71 | -2 | 43.8 kBtu/ft² | 734 tCO₂e |
| 2023 | 73 | ±0 | 44.1 kBtu/ft² | 756 tCO₂e |
| 2022 | 73 | +1 | 45.6 kBtu/ft² | 758 tCO₂e |
| 2021 | 72 | -6 | 45.1 kBtu/ft² | 800 tCO₂e |
| 2020 | 78 | +9 | 38.0 kBtu/ft² | 694 tCO₂e |
| 2019 | 69 | +3 | 53.7 kBtu/ft² | 982 tCO₂e |
| 2018 | 66 | -16 | 54.9 kBtu/ft² | 1,004 tCO₂e |
| 2017 | 82 | +4 | 48.7 kBtu/ft² | 1,031 tCO₂e |
| 2016 | 78 | -1 | 52.9 kBtu/ft² | 1,159 tCO₂e |
| 2015 | 79 | +2 | 57.0 kBtu/ft² | 1,458 tCO₂e |
| 2014 | 77 | +5 | 58.9 kBtu/ft² | 1,504 tCO₂e |
| 2013 | 72 | 61.7 kBtu/ft² | 1,491 tCO₂e | |
| 2012 | — | 59.6 kBtu/ft² | 1,615 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
CONNECTICUT / DESALES LLC
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Location
- Address
- 1133 Connecticut Ave NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20036
- Coordinates
- 38.90498, -77.04023
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 1133 Connecticut Ave compare with other office buildings in Washington, DC?
The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 1133 Connecticut Ave's ENERGY STAR score of 71 compares with an average of 70 across the 774 that report a score; it scores higher than 38% of them and lower than 59%. Its site EUI of 43.8 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 23% below the group average of 5.0 kgCO₂e/ft².
At 190,958 sq ft, it is about 12% below the average floor area of 216,135 sq ft for those buildings. It was built in 1988, 14 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 1133 Connecticut Ave's energy performance changed over time?
BuildingCensus holds 13 Washington, DC disclosures for 1133 Connecticut Ave, covering report years 2012–2024. Its ENERGY STAR score went from 72 in 2013 to 71 in 2024 (-1 points); its best year on file was 2017, at 82. Site EUI moved from 59.6 kBtu/ft² (2012) to 43.8 kBtu/ft² (2024), a 27% decrease. Reported emissions went from 1,615 tCO₂e to 734 tCO₂e over the same span (down 55%).
What does an ENERGY STAR score of 71 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 71 means the building performs better than about 71% of its national peers. BuildingCensus bands the score into report-card grades; 71 falls in band B — above median (70–84). It sits 4 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. 1133 Connecticut Ave's 43.8 kBtu/ft² across 190,958 sq ft works out to about 8.4 billion Btu (2,451 MWh-equivalent) in 2024. Its source EUI of 122.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,451,884 kWh of electricity, 0 therms of natural gas and 2,562 thousand gallons of water for the year.
Which law requires 1133 Connecticut Ave to report its energy use?
1133 Connecticut Ave 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:PM2962687:2024). 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
- The Vanguard Building· 190,874 sq ft · score 100 (A)
- 1101 Vermont· 190,509 sq ft
- 1201 Connecticut Novel Coworking LLC· 190,385 sq ft · score 84 (B)
- 1501 M Street· 189,146 sq ft · score 58 (C)
- 999 E Street· 188,671 sq ft · EUI 61.4 kBtu/ft²
- UFCW Building· 188,086 sq ft · score 89 (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 1133 Connecticut Ave's energy grade?
1133 Connecticut Ave scores 71 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 1133 Connecticut Ave use?
Its 2024 site energy-use intensity was 43.8 kBtu/ft² (122.7 kBtu/ft² source) across 190,958 sq ft, including 2,451,884 kWh of electricity and 0 therms of natural gas.
What are 1133 Connecticut Ave's carbon emissions?
1133 Connecticut Ave reported 734 tCO₂e of greenhouse-gas emissions (3.8 kgCO₂e/ft²) for 2024.
Where is 1133 Connecticut Ave?
1133 Connecticut Ave is at 1133 Connecticut Ave NW, in Washington, DC 20036. Its coordinates are 38.90498, -77.04023 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1133 Connecticut Ave and when was it built?
1133 Connecticut Ave has 190,958 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1988 as its year built. It is classed as office.
Is 1133 Connecticut Ave 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, “1133 Connecticut Ave, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/1133-connecticut-ave-4b48ffee (data as of July 9, 2026).