1000 Massachusetts Avenue
Office in Washington, DC, DC · 20001
At a glance
1000 Massachusetts Avenue is a 79,037-square-foot office building in Washington, DC, built in 1993. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 52 out of 100 (grade D), a site energy-use intensity of 63.4 kBtu/ft² and 440 tCO₂e of greenhouse-gas emissions. That score is higher than 17% 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 | 52 (band D) |
| Site EUI | 63.4 kBtu/ft² |
| Source EUI | 177.4 kBtu/ft² |
| GHG emissions | 440 tCO₂e |
| GHG intensity | 5.6 kgCO₂e/ft² |
| Electricity | 1,467,944 kWh |
| Natural gas | 0 therms |
| Water use | 1,362 kgal |
| Gross floor area | 79,037 sq ft |
| Source record | dc:PM4531849:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 52 | +1 | 63.4 kBtu/ft² | 440 tCO₂e |
| 2023 | 51 | +2 | 64.0 kBtu/ft² | 455 tCO₂e |
| 2022 | 49 | -2 | 66.8 kBtu/ft² | 460 tCO₂e |
| 2021 | 51 | -1 | 64.0 kBtu/ft² | 452 tCO₂e |
| 2020 | 52 | +15 | 65.1 kBtu/ft² | 473 tCO₂e |
| 2019 | 37 | +6 | 78.6 kBtu/ft² | 572 tCO₂e |
| 2018 | 31 | -24 | 85.5 kBtu/ft² | 622 tCO₂e |
| 2017 | 55 | -5 | 72.7 kBtu/ft² | 613 tCO₂e |
| 2016 | 60 | -4 | 70.7 kBtu/ft² | 596 tCO₂e |
| 2015 | 64 | +13 | 67.4 kBtu/ft² | 568 tCO₂e |
| 2014 | 51 | 77.4 kBtu/ft² | 653 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
CATO INSTITUTE INC
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Location
- Address
- 1000 Massachusetts Avenue
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20001
- Coordinates
- 38.90308, -77.02628
Within ~1 km
Nearby benchmarked buildings
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See also: most efficient in Washington, DC · biggest emitters
How does 1000 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. 1000 Massachusetts Avenue's ENERGY STAR score of 52 compares with an average of 70 across the 774 that report a score; it scores higher than 17% of them and lower than 82%. Its site EUI of 63.4 kBtu/ft² is about 14% above the average of 55.6 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 5.6 kgCO₂e/ft² is about 11% above the group average of 5.0 kgCO₂e/ft².
At 79,037 sq ft, it is about 63% below the average floor area of 216,135 sq ft for those buildings. It was built in 1993, 19 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 1000 Massachusetts Avenue's energy performance changed over time?
BuildingCensus holds 11 Washington, DC disclosures for 1000 Massachusetts Avenue, covering report years 2014–2024. Its ENERGY STAR score went from 51 in 2014 to 52 in 2024 (+1 points); its best year on file was 2015, at 64. Site EUI moved from 77.4 kBtu/ft² (2014) to 63.4 kBtu/ft² (2024), a 18% decrease. Reported emissions went from 653 tCO₂e to 440 tCO₂e over the same span (down 33%).
What does an ENERGY STAR score of 52 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 52 means the building performs better than about 52% of its national peers. BuildingCensus bands the score into report-card grades; 52 falls in band D — lowest band (1–54). It sits 23 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. 1000 Massachusetts Avenue's 63.4 kBtu/ft² across 79,037 sq ft works out to about 5 billion Btu (1,469 MWh-equivalent) in 2024. Its source EUI of 177.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,467,944 kWh of electricity, 0 therms of natural gas and 1,362 thousand gallons of water for the year.
Which law requires 1000 Massachusetts Avenue to report its energy use?
1000 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:PM4531849:2024). 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
- 1818 New York Ave Office Building· 79,000 sq ft · score 95 (A)
- 734 15th St NW· 78,846 sq ft
- Willcap Holdings LLC· 78,495 sq ft · score 72 (B)
- 1430 K Street Condominium· 78,002 sq ft · score 46 (D)
- IBT Annex· 77,505 sq ft · score 48 (D)
- 2100 MLK· 76,857 sq ft · score 53 (D)
- 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 1000 Massachusetts Avenue's energy grade?
1000 Massachusetts Avenue scores 52 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1000 Massachusetts Avenue use?
Its 2024 site energy-use intensity was 63.4 kBtu/ft² (177.4 kBtu/ft² source) across 79,037 sq ft, including 1,467,944 kWh of electricity and 0 therms of natural gas.
What are 1000 Massachusetts Avenue's carbon emissions?
1000 Massachusetts Avenue reported 440 tCO₂e of greenhouse-gas emissions (5.6 kgCO₂e/ft²) for 2024.
Where is 1000 Massachusetts Avenue?
1000 Massachusetts Avenue is in Washington, DC 20001. Its coordinates are 38.90308, -77.02628 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1000 Massachusetts Avenue and when was it built?
1000 Massachusetts Avenue has 79,037 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1993 as its year built. It is classed as office.
Is 1000 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, “1000 Massachusetts Avenue, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/1000-massachusetts-avenue-4e0a7ef1 (data as of July 9, 2026).