111 Mass Ave
Office in Washington, DC, DC · 111 Massachusetts Ave, NW · 20001
At a glance
111 Mass Ave is a 310,129-square-foot office building at 111 Massachusetts Ave, NW in Washington, DC, built in 1983. In its 2022 Washington, DC benchmarking disclosure it reported a site energy-use intensity of 25.7 kBtu/ft² and 716 tCO₂e of greenhouse-gas emissions.
Clean and Affordable Energy Act / BEPS · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 25.7 kBtu/ft² |
| Source EUI | 71.9 kBtu/ft² |
| GHG emissions | 716 tCO₂e |
| GHG intensity | 2.3 kgCO₂e/ft² |
| Electricity | 2,335,132 kWh |
| Natural gas | 0 therms |
| Water use | 1,753 kgal |
| Gross floor area | 310,129 sq ft |
| Source record | dc:PM3283514:2022 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2022latest | — | 25.7 kBtu/ft² | 716 tCO₂e | |
| 2021 | — | 16.4 kBtu/ft² | 472 tCO₂e | |
| 2020 | 99 | +12 | 18.7 kBtu/ft² | 539 tCO₂e |
| 2019 | 87 | +21 | 37.3 kBtu/ft² | 1,107 tCO₂e |
| 2018 | 66 | -12 | 56.2 kBtu/ft² | 1,670 tCO₂e |
| 2017 | 78 | +2 | 56.3 kBtu/ft² | 1,938 tCO₂e |
| 2016 | 76 | +7 | 58.7 kBtu/ft² | 2,089 tCO₂e |
| 2015 | 69 | +11 | 65.2 kBtu/ft² | 2,708 tCO₂e |
| 2014 | 58 | -2 | 74.1 kBtu/ft² | 3,077 tCO₂e |
| 2013 | 60 | +9 | 72.1 kBtu/ft² | 2,832 tCO₂e |
| 2012 | 51 | 80.0 kBtu/ft² | 3,512 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
GEORGETOWN UNIVERSITY
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Location
- Address
- 111 Massachusetts Ave, NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20001
- Coordinates
- 38.89970, -77.01324
Within ~1 km
Nearby benchmarked buildings
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- H. Carl Moultrie Bldgscore —
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- Georgetown Lawscore —
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- D.C. Hyatt Regencyscore 83
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See also: most efficient in Washington, DC · biggest emitters
How does 111 Mass 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. Its site EUI of 25.7 kBtu/ft² is about half of 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 2.3 kgCO₂e/ft² is about half of the group average of 5.0 kgCO₂e/ft².
At 310,129 sq ft, it is about 43% above the average floor area of 216,135 sq ft for those buildings. It was built in 1983, 9 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 111 Mass Ave's energy performance changed over time?
BuildingCensus holds 11 Washington, DC disclosures for 111 Mass Ave, covering report years 2012–2022. Its ENERGY STAR score went from 51 in 2012 to 99 in 2020 (+48 points). Site EUI moved from 80.0 kBtu/ft² (2012) to 25.7 kBtu/ft² (2022), a 68% decrease. Reported emissions went from 3,512 tCO₂e to 716 tCO₂e over the same span (down 80%).
What does a site EUI of 25.7 kBtu/ft² mean?
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. 111 Mass Ave's 25.7 kBtu/ft² across 310,129 sq ft works out to about 8 billion Btu (2,336 MWh-equivalent) in 2022. Its source EUI of 71.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,335,132 kWh of electricity, 0 therms of natural gas and 1,753 thousand gallons of water for the year.
Which law requires 111 Mass Ave to report its energy use?
111 Mass 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 2022 disclosure (source record dc:PM3283514:2022). 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
- 901 K Street - Church· 310,106 sq ft · score 78 (B)
- U.S. Coast Guard· 309,954 sq ft · score 88 (A)
- 655 K Street - AAMC· 309,924 sq ft · score 61 (C)
- 1666 K St NW· 309,643 sq ft · score 51 (D)
- CTTWB· 307,566 sq ft · EUI 16.3 kBtu/ft²
- 1110 Vermont Avenue, NW· 307,471 sq ft · score 85 (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 111 Mass Ave's energy grade?
111 Mass Ave did not report an ENERGY STAR score in its 2022 disclosure, but its site energy-use intensity was 25.7 kBtu/ft².
How much energy does 111 Mass Ave use?
Its 2022 site energy-use intensity was 25.7 kBtu/ft² (71.9 kBtu/ft² source) across 310,129 sq ft, including 2,335,132 kWh of electricity and 0 therms of natural gas.
What are 111 Mass Ave's carbon emissions?
111 Mass Ave reported 716 tCO₂e of greenhouse-gas emissions (2.3 kgCO₂e/ft²) for 2022.
Where is 111 Mass Ave?
111 Mass Ave is at 111 Massachusetts Ave, NW, in Washington, DC 20001. Its coordinates are 38.89970, -77.01324 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 111 Mass Ave and when was it built?
111 Mass Ave has 310,129 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1983 as its year built. It is classed as office.
Is 111 Mass Ave covered by the Clean and Affordable Energy Act / BEPS?
Yes — it appears in the 2022 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, “111 Mass Ave, Washington, DC — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/111-mass-ave-5306f7d7 (data as of July 9, 2026).