1000 Maine Ave
Office in Washington, DC, DC · 1000 Maine Ave SW · 20024
At a glance
1000 Maine Ave is a 298,582-square-foot office building at 1000 Maine Ave SW in Washington, DC, built in 2018. In its 2023 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 75 out of 100 (grade B), a site energy-use intensity of 43.8 kBtu/ft² and 1,041 tCO₂e of greenhouse-gas emissions. That score is higher than 48% of the 774 scored office buildings in Washington, DC.
Clean and Affordable Energy Act / BEPS · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 75 (band B) |
| Site EUI | 43.8 kBtu/ft² |
| Source EUI | 122.4 kBtu/ft² |
| GHG emissions | 1,041 tCO₂e |
| GHG intensity | 3.5 kgCO₂e/ft² |
| Electricity | 3,818,460 kWh |
| Natural gas | 589 therms |
| Water use | 4,365 kgal |
| Gross floor area | 298,582 sq ft |
| Source record | dc:PM6453835:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 75 | +7 | 43.8 kBtu/ft² | 1,041 tCO₂e |
| 2022 | 68 | -2 | 53.2 kBtu/ft² | 1,269 tCO₂e |
| 2021 | 70 | -2 | 51.4 kBtu/ft² | 1,306 tCO₂e |
| 2020 | 72 | 49.5 kBtu/ft² | 1,297 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
WHARF 1 OFFICE REIT LEASEHOLDER LLC
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Location
- Address
- 1000 Maine Ave SW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20024
- Coordinates
- 38.88085, -77.02659
Within ~1 km
Nearby benchmarked buildings
- Constitution Centerscore 83
Office · 1,582,262 sq ft
- Harbour Square Owners, Inc.score 47
Multifamily Housing · 729,310 sq ft
- Harbour Squarescore 18
Multifamily Housing · 706,408 sq ft
- Portals IIscore 86
Office · 674,936 sq ft
- Waterside Towers and Townhomesscore 81
Multifamily Housing · 674,080 sq ft
- The Channel (lh71)score —
Multifamily Housing · 603,003 sq ft
See also: most efficient in Washington, DC · biggest emitters
How does 1000 Maine 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. 1000 Maine Ave's ENERGY STAR score of 75 compares with an average of 70 across the 774 that report a score; it scores higher than 48% of them and lower than 50%. 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 3.5 kgCO₂e/ft² is about 30% below the group average of 5.0 kgCO₂e/ft².
At 298,582 sq ft, it is about 38% above the average floor area of 216,135 sq ft for those buildings. It was built in 2018, 44 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 Maine Ave's energy performance changed over time?
BuildingCensus holds 4 Washington, DC disclosures for 1000 Maine Ave, covering report years 2020–2023. Its ENERGY STAR score went from 72 in 2020 to 75 in 2023 (+3 points). Site EUI moved from 49.5 kBtu/ft² (2020) to 43.8 kBtu/ft² (2023), a 12% decrease. Reported emissions went from 1,297 tCO₂e to 1,041 tCO₂e over the same span (down 20%).
What does an ENERGY STAR score of 75 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 75 means the building performs better than about 75% of its national peers. BuildingCensus bands the score into report-card grades; 75 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. 1000 Maine Ave's 43.8 kBtu/ft² across 298,582 sq ft works out to about 13.1 billion Btu (3,833 MWh-equivalent) in 2023. Its source EUI of 122.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,818,460 kWh of electricity, 589 therms of natural gas and 4,365 thousand gallons of water for the year.
Which law requires 1000 Maine Ave to report its energy use?
1000 Maine 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 2023 disclosure (source record dc:PM6453835:2023). 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
- Gallery Place - Office· 297,002 sq ft · score 77 (B)
- Waterfront Station II· 296,748 sq ft · score 80 (B)
- 55 M Street Office & Retail· 295,059 sq ft · score 94 (A)
- Waterfront Municipal Center West· 295,000 sq ft · EUI 61.1 kBtu/ft²
- Patriots Plaza I - 2061 (Brightly)· 294,130 sq ft · score 85 (A)
- 1275 NJ· 293,884 sq ft · score 80 (B)
- 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 Maine Ave's energy grade?
1000 Maine Ave scores 75 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1000 Maine Ave use?
Its 2023 site energy-use intensity was 43.8 kBtu/ft² (122.4 kBtu/ft² source) across 298,582 sq ft, including 3,818,460 kWh of electricity and 589 therms of natural gas.
What are 1000 Maine Ave's carbon emissions?
1000 Maine Ave reported 1,041 tCO₂e of greenhouse-gas emissions (3.5 kgCO₂e/ft²) for 2023.
Where is 1000 Maine Ave?
1000 Maine Ave is at 1000 Maine Ave SW, in Washington, DC 20024. Its coordinates are 38.88085, -77.02659 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1000 Maine Ave and when was it built?
1000 Maine Ave has 298,582 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2018 as its year built. It is classed as office.
Is 1000 Maine Ave covered by the Clean and Affordable Energy Act / BEPS?
Yes — it appears in the 2023 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 Maine Ave, Washington, DC — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/1000-maine-ave-cb1a7d8e (data as of July 9, 2026).