One Washingtonian Center
Office in Montgomery County, MD · 9801 Washingtonian Blvd · 20878
At a glance
One Washingtonian Center is a 341,287-square-foot office building at 9801 Washingtonian Blvd in Montgomery County, Maryland, built in 1989. In its 2024 Montgomery County benchmarking disclosure it reported an ENERGY STAR score of 87 out of 100 (grade A), a site energy-use intensity of 35.5 kBtu/ft² and 1,064 tCO₂e of greenhouse-gas emissions. That score is higher than 80% of the 325 scored office buildings in Montgomery County.
Benchmarking Law (Bill 2-14) / BEPS (Bill 16-21) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 87 (band A) |
| Site EUI | 35.5 kBtu/ft² |
| Source EUI | 99.4 kBtu/ft² |
| GHG emissions | 1,064 tCO₂e |
| GHG intensity | — |
| Electricity | 3,552,647 kWh |
| Natural gas | 0 therms |
| Gross floor area | 341,287 sq ft |
| Source record | montgomery_county:1034844:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 87 | +8 | 35.5 kBtu/ft² | 1,064 tCO₂e |
| 2023 | 79 | 43.6 kBtu/ft² | 1,336 tCO₂e |
Compliance context
Benchmarking Law (Bill 2-14) / BEPS (Bill 16-21)
Montgomery County's BEPS (Bill 16-21; regulations approved in 2025) sets declining site-EUI standards for buildings of 25,000+ sq ft, with interim and then final standards later this decade and into the 2030s depending on building type.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 9801 Washingtonian Blvd
- State
- Maryland
- ZIP
- 20878
Within ~1 km
Nearby benchmarked buildings
This source publishes no coordinates, so nearby buildings can't be resolved yet.
See also: most efficient in Montgomery County · biggest emitters
How does One Washingtonian Center compare with other office buildings in Montgomery County?
The latest disclosures cover 414 office buildings in Montgomery County, out of 1,766 buildings citywide. One Washingtonian Center's ENERGY STAR score of 87 compares with an average of 63 across the 325 that report a score; it scores higher than 80% of them and lower than 18%. Its site EUI of 35.5 kBtu/ft² is about half of the average of 66.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 341,287 sq ft, it is about 158% above the average floor area of 132,356 sq ft for those buildings. Its 1989 construction date is close to the group's average year built (1987). 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 One Washingtonian Center's energy performance changed over time?
BuildingCensus holds 2 Montgomery County disclosures for One Washingtonian Center, covering report years 2023–2024. Its ENERGY STAR score went from 79 in 2023 to 87 in 2024 (+8 points). Site EUI moved from 43.6 kBtu/ft² (2023) to 35.5 kBtu/ft² (2024), a 19% decrease. Reported emissions went from 1,336 tCO₂e to 1,064 tCO₂e over the same span (down 20%).
What does an ENERGY STAR score of 87 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 87 means the building performs better than about 87% of its national peers. BuildingCensus bands the score into report-card grades; 87 falls in band A — high performer (85–100). 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 Montgomery County, 53% 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. One Washingtonian Center's 35.5 kBtu/ft² across 341,287 sq ft works out to about 12.1 billion Btu (3,551 MWh-equivalent) in 2024. Its source EUI of 99.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,552,647 kWh of electricity and 0 therms of natural gas for the year.
Which law requires One Washingtonian Center to report its energy use?
One Washingtonian Center reports under the Benchmarking Law (Bill 2-14) / BEPS (Bill 16-21), the legal basis of Montgomery County's Commercial 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 montgomery_county:1034844:2024). Montgomery County's BEPS (Bill 16-21; regulations approved in 2025) sets declining site-EUI standards for buildings of 25,000+ sq ft, with interim and then final standards later this decade and into the 2030s depending on building type.
More office buildings in Montgomery County
- Ssmc Iv· 322,550 sq ft · score 87 (A)
- Democracy Center Ii - 6903· 320,622 sq ft · EUI 45.9 kBtu/ft²
- Washingtonian· 318,229 sq ft · EUI 124.7 kBtu/ft²
- 4747 Bethesda Ave (Be197)· 317,418 sq ft · score 64 (C)
- Capital Gateway I· 316,945 sq ft · score 87 (A)
- Silver Spring Metro Center· 311,502 sq ft · score 90 (A)
- Office buildings in Montgomery County· 414 benchmarked
- All Montgomery County benchmarked buildings· Benchmarking Law (Bill 2-14) / BEPS (Bill 16-21)
- Most efficient large buildings in Montgomery County
- Least efficient large buildings in Montgomery County
- Biggest emitters in Montgomery County
Frequently asked questions
What is One Washingtonian Center's energy grade?
One Washingtonian Center scores 87 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 Montgomery County disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does One Washingtonian Center use?
Its 2024 site energy-use intensity was 35.5 kBtu/ft² (99.4 kBtu/ft² source) across 341,287 sq ft, including 3,552,647 kWh of electricity and 0 therms of natural gas.
What are One Washingtonian Center's carbon emissions?
One Washingtonian Center reported 1,064 tCO₂e of greenhouse-gas emissions for 2024.
Where is One Washingtonian Center?
One Washingtonian Center is at 9801 Washingtonian Blvd, in Montgomery County, Maryland 20878.
How big is One Washingtonian Center and when was it built?
One Washingtonian Center has 341,287 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1989 as its year built. It is classed as office.
Is One Washingtonian Center covered by the Benchmarking Law (Bill 2-14) / BEPS (Bill 16-21)?
Yes — it appears in the 2024 Commercial Building Energy Benchmarking disclosure, which lists the buildings reporting under the Benchmarking Law (Bill 2-14) / BEPS (Bill 16-21).
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About this data
Source: Commercial Building Energy Benchmarking (Benchmarking Law (Bill 2-14) / BEPS (Bill 16-21)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “One Washingtonian Center, Montgomery County, Maryland — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/montgomery-county/one-washingtonian-center-39d1ccf7 (data as of October 2, 2026).