Quince Diamond Executive Center
Office in Montgomery County, MD · 555 Quince Orchard Rd · 20878
At a glance
Quince Diamond Executive Center is a 114,606-square-foot office building at 555 Quince Orchard Rd in Montgomery County, Maryland, built in 1987. In its 2024 Montgomery County benchmarking disclosure it reported an ENERGY STAR score of 74 out of 100 (grade B), a site energy-use intensity of 48.7 kBtu/ft² and 490 tCO₂e of greenhouse-gas emissions. That score is higher than 55% 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 | 74 (band B) |
| Site EUI | 48.7 kBtu/ft² |
| Source EUI | 136.3 kBtu/ft² |
| GHG emissions | 490 tCO₂e |
| GHG intensity | — |
| Electricity | 1,635,002 kWh |
| Natural gas | 0 therms |
| Gross floor area | 114,606 sq ft |
| Source record | montgomery_county:25181205:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 74 | +8 | 48.7 kBtu/ft² | 490 tCO₂e |
| 2023 | 66 | 54.3 kBtu/ft² | 560 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
- 555 Quince Orchard Rd
- 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 Quince Diamond Executive 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. Quince Diamond Executive Center's ENERGY STAR score of 74 compares with an average of 63 across the 325 that report a score; it scores higher than 55% of them and lower than 43%. Its site EUI of 48.7 kBtu/ft² is about 27% below the average of 66.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 114,606 sq ft, it is about 13% below the average floor area of 132,356 sq ft for those buildings. Its 1987 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 Quince Diamond Executive Center's energy performance changed over time?
BuildingCensus holds 2 Montgomery County disclosures for Quince Diamond Executive Center, covering report years 2023–2024. Its ENERGY STAR score went from 66 in 2023 to 74 in 2024 (+8 points). Site EUI moved from 54.3 kBtu/ft² (2023) to 48.7 kBtu/ft² (2024), a 10% decrease. Reported emissions went from 560 tCO₂e to 490 tCO₂e over the same span (down 13%).
What does an ENERGY STAR score of 74 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 74 means the building performs better than about 74% of its national peers. BuildingCensus bands the score into report-card grades; 74 falls in band B — above median (70–84). It sits 1 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. Quince Diamond Executive Center's 48.7 kBtu/ft² across 114,606 sq ft works out to about 5.6 billion Btu (1,636 MWh-equivalent) in 2024. Its source EUI of 136.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,635,002 kWh of electricity and 0 therms of natural gas for the year.
Which law requires Quince Diamond Executive Center to report its energy use?
Quince Diamond Executive 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:25181205:2024). 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
- 1350 Piccard· 113,625 sq ft · score 68 (C)
- 15 West Gude Dr. - Rockville· 113,034 sq ft · score 88 (A)
- Monarch Building· 112,474 sq ft · score 54 (D)
- 1390 Piccard Dr· 111,316 sq ft · score 77 (B)
- Bethesda Row· 111,079 sq ft · score 83 (B)
- Wayne Plaza· 110,344 sq ft · score 67 (C)
- 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 Quince Diamond Executive Center's energy grade?
Quince Diamond Executive Center scores 74 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 Montgomery County disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Quince Diamond Executive Center use?
Its 2024 site energy-use intensity was 48.7 kBtu/ft² (136.3 kBtu/ft² source) across 114,606 sq ft, including 1,635,002 kWh of electricity and 0 therms of natural gas.
What are Quince Diamond Executive Center's carbon emissions?
Quince Diamond Executive Center reported 490 tCO₂e of greenhouse-gas emissions for 2024.
Where is Quince Diamond Executive Center?
Quince Diamond Executive Center is at 555 Quince Orchard Rd, in Montgomery County, Maryland 20878.
How big is Quince Diamond Executive Center and when was it built?
Quince Diamond Executive Center has 114,606 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1987 as its year built. It is classed as office.
Is Quince Diamond Executive 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, “Quince Diamond Executive Center, Montgomery County, Maryland — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/montgomery-county/quince-diamond-executive-center-b1b5d850 (data as of October 2, 2026).