600 Massachusetts Avenue
Office in Washington, DC, DC · 600 Mass Ave NW · 20001
At a glance
600 Massachusetts Avenue is a 422,906-square-foot office building at 600 Mass Ave NW in Washington, DC, built in 2016. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 79 out of 100 (grade B), a site energy-use intensity of 55.8 kBtu/ft² and 1,713 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 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 79 (band B) |
| Site EUI | 55.8 kBtu/ft² |
| Source EUI | 130.1 kBtu/ft² |
| GHG emissions | 1,713 tCO₂e |
| GHG intensity | 4.0 kgCO₂e/ft² |
| Electricity | 5,068,030 kWh |
| Natural gas | 62,523 therms |
| Water use | 4,873 kgal |
| Gross floor area | 422,906 sq ft |
| Source record | dc:PM6064771:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 79 | -5 | 55.8 kBtu/ft² | 1,713 tCO₂e |
| 2023 | 84 | ±0 | 39.4 kBtu/ft² | 1,313 tCO₂e |
| 2022 | 84 | -1 | 39.7 kBtu/ft² | 1,458 tCO₂e |
| 2021 | 85 | ±0 | 36.9 kBtu/ft² | 1,404 tCO₂e |
| 2020 | 85 | +5 | 37.6 kBtu/ft² | 1,465 tCO₂e |
| 2019 | 80 | -1 | 46.5 kBtu/ft² | 1,810 tCO₂e |
| 2018 | 81 | 46.0 kBtu/ft² | 1,789 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
SQUARE 452 LLC
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Location
- Address
- 600 Mass Ave NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20001
- Coordinates
- 38.90140, -77.02053
Within ~1 km
Nearby benchmarked buildings
Convention Center · 1,750,000 sq ft
- 616 E St.score —
Multifamily Housing · 1,150,961 sq ft
Hotel · 1,081,202 sq ft
Multifamily Housing · 1,075,449 sq ft
Office · 887,915 sq ft
Office · 876,744 sq ft
See also: most efficient in Washington, DC · biggest emitters
How does 600 Massachusetts 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. 600 Massachusetts 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 55.8 kBtu/ft² is roughly in line with the average of 55.6 kBtu/ft². Its emissions intensity of 4.0 kgCO₂e/ft² is about 19% below the group average of 5.0 kgCO₂e/ft².
At 422,906 sq ft, it is about twice the average floor area of 216,135 sq ft for those buildings. It was built in 2016, 42 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 600 Massachusetts Avenue's energy performance changed over time?
BuildingCensus holds 7 Washington, DC disclosures for 600 Massachusetts Avenue, covering report years 2018–2024. Its ENERGY STAR score went from 81 in 2018 to 79 in 2024 (-2 points); its best year on file was 2020, at 85. Site EUI moved from 46.0 kBtu/ft² (2018) to 55.8 kBtu/ft² (2024), an 21% increase. Reported emissions went from 1,789 tCO₂e to 1,713 tCO₂e over the same span (down 4%).
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. 600 Massachusetts Avenue's 55.8 kBtu/ft² across 422,906 sq ft works out to about 23.6 billion Btu (6,916 MWh-equivalent) in 2024. Its source EUI of 130.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 5,068,030 kWh of electricity, 62,523 therms of natural gas and 4,873 thousand gallons of water for the year.
Which law requires 600 Massachusetts Avenue to report its energy use?
600 Massachusetts 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 2024 disclosure (source record dc:PM6064771:2024). 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
- 901 D Street· 422,227 sq ft · score 97 (A)
- 1625 Eye Street· 419,302 sq ft · score 72 (B)
- Half Street· 418,422 sq ft · score 86 (A)
- Patriots Plaza III - 2262 (Brightly)· 414,177 sq ft · score 88 (A)
- 2000 Pennsylvania Avenue· 411,597 sq ft · score 55 (C)
- Judiciary Center· 410,925 sq ft · EUI 6.5 kBtu/ft²
- 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 600 Massachusetts Avenue's energy grade?
600 Massachusetts Avenue scores 79 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 600 Massachusetts Avenue use?
Its 2024 site energy-use intensity was 55.8 kBtu/ft² (130.1 kBtu/ft² source) across 422,906 sq ft, including 5,068,030 kWh of electricity and 62,523 therms of natural gas.
What are 600 Massachusetts Avenue's carbon emissions?
600 Massachusetts Avenue reported 1,713 tCO₂e of greenhouse-gas emissions (4.0 kgCO₂e/ft²) for 2024.
Where is 600 Massachusetts Avenue?
600 Massachusetts Avenue is at 600 Mass Ave NW, in Washington, DC 20001. Its coordinates are 38.90140, -77.02053 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 600 Massachusetts Avenue and when was it built?
600 Massachusetts Avenue has 422,906 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2016 as its year built. It is classed as office.
Is 600 Massachusetts Avenue 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, “600 Massachusetts Avenue, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/600-massachusetts-avenue-a223b7af (data as of July 9, 2026).