Diamond Office Center
Office in Montgomery County, MD · 806 West Diamond Avenue · 20878
At a glance
Diamond Office Center is a 39,175-square-foot office building at 806 West Diamond Avenue in Montgomery County, Maryland, built in 1986. In its 2024 Montgomery County benchmarking disclosure it reported an ENERGY STAR score of 13 out of 100 (grade D), a site energy-use intensity of 108.5 kBtu/ft² and 373 tCO₂e of greenhouse-gas emissions. That score is higher than 7% 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 | 13 (band D) |
| Site EUI | 108.5 kBtu/ft² |
| Source EUI | 303.9 kBtu/ft² |
| GHG emissions | 373 tCO₂e |
| GHG intensity | — |
| Electricity | 1,246,034 kWh |
| Natural gas | 0 therms |
| Gross floor area | 39,175 sq ft |
| Source record | montgomery_county:17367729:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 13 | +5 | 108.5 kBtu/ft² | 373 tCO₂e |
| 2023 | 8 | 121.3 kBtu/ft² | 427 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
- 806 West Diamond Avenue
- 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 Diamond Office 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. Diamond Office Center's ENERGY STAR score of 13 compares with an average of 63 across the 325 that report a score; it scores higher than 7% of them and lower than 93%. Its site EUI of 108.5 kBtu/ft² is about 63% above the average of 66.5 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 39,175 sq ft, it is about 70% below the average floor area of 132,356 sq ft for those buildings. Its 1986 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 Diamond Office Center's energy performance changed over time?
BuildingCensus holds 2 Montgomery County disclosures for Diamond Office Center, covering report years 2023–2024. Its ENERGY STAR score went from 8 in 2023 to 13 in 2024 (+5 points). Site EUI moved from 121.3 kBtu/ft² (2023) to 108.5 kBtu/ft² (2024), a 11% decrease. Reported emissions went from 427 tCO₂e to 373 tCO₂e over the same span (down 13%).
What does an ENERGY STAR score of 13 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 13 means the building performs better than about 13% of its national peers. BuildingCensus bands the score into report-card grades; 13 falls in band D — lowest band (1–54). It sits 62 points below 75, the threshold for ENERGY STAR certification. 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. Diamond Office Center's 108.5 kBtu/ft² across 39,175 sq ft works out to about 4.3 billion Btu (1,246 MWh-equivalent) in 2024. Its source EUI of 303.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,246,034 kWh of electricity and 0 therms of natural gas for the year.
Which law requires Diamond Office Center to report its energy use?
Diamond Office 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:17367729:2024). 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
- Eb Clarksburg Llc (22520)· 38,971 sq ft
- 200 Monroe Street· 38,272 sq ft · score 58 (C)
- 15010 Broschart Road· 38,204 sq ft · EUI 112.2 kBtu/ft²
- 5000-5020 Nicholson Court· 37,900 sq ft · EUI 42.9 kBtu/ft²
- Rock Creek Century Llc, 20420· 37,388 sq ft · score 45 (D)
- Talbot· 36,950 sq ft · score 20 (D)
- 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 Diamond Office Center's energy grade?
Diamond Office Center scores 13 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 Montgomery County disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Diamond Office Center use?
Its 2024 site energy-use intensity was 108.5 kBtu/ft² (303.9 kBtu/ft² source) across 39,175 sq ft, including 1,246,034 kWh of electricity and 0 therms of natural gas.
What are Diamond Office Center's carbon emissions?
Diamond Office Center reported 373 tCO₂e of greenhouse-gas emissions for 2024.
Where is Diamond Office Center?
Diamond Office Center is at 806 West Diamond Avenue, in Montgomery County, Maryland 20878.
How big is Diamond Office Center and when was it built?
Diamond Office Center has 39,175 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1986 as its year built. It is classed as office.
Is Diamond Office 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, “Diamond Office Center, Montgomery County, Maryland — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/montgomery-county/diamond-office-center-822eb14a (data as of October 2, 2026).