Windsor Court (13800-13842 Castle)
Multifamily Housing in Montgomery County, MD · 13800 Castle Blv · 20904
At a glance
Windsor Court (13800-13842 Castle) is a 254,607-square-foot multifamily housing building at 13800 Castle Blv in Montgomery County, Maryland, built in 1975. In its 2024 Montgomery County benchmarking disclosure it reported an ENERGY STAR score of 64 out of 100 (grade C), a site energy-use intensity of 58.3 kBtu/ft² and 909 tCO₂e of greenhouse-gas emissions. That score is higher than 18% of the 514 scored multifamily housing buildings in Montgomery County.
Benchmarking Law (Bill 2-14) / BEPS (Bill 16-21) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 64 (band C) |
| Site EUI | 58.3 kBtu/ft² |
| Source EUI | 92.5 kBtu/ft² |
| GHG emissions | 909 tCO₂e |
| GHG intensity | — |
| Electricity | 1,332,884 kWh |
| Natural gas | 102,981 therms |
| Gross floor area | 254,607 sq ft |
| Source record | montgomery_county:36482947:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 64 | +3 | 58.3 kBtu/ft² | 909 tCO₂e |
| 2023 | 61 | 57.1 kBtu/ft² | 883 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
- 13800 Castle Blv
- State
- Maryland
- ZIP
- 20904
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 Windsor Court (13800-13842 Castle) compare with other multifamily housing buildings in Montgomery County?
The latest disclosures cover 553 multifamily housing buildings in Montgomery County, out of 1,766 buildings citywide. Windsor Court (13800-13842 Castle)'s ENERGY STAR score of 64 compares with an average of 80 across the 514 that report a score; it scores higher than 18% of them and lower than 82%. Its site EUI of 58.3 kBtu/ft² is about 35% above the average of 43.2 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 254,607 sq ft, it is about 28% above the average floor area of 198,668 sq ft for those buildings. It was built in 1975, 14 years earlier than the group's average year built (1989). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Windsor Court (13800-13842 Castle)'s energy performance changed over time?
BuildingCensus holds 2 Montgomery County disclosures for Windsor Court (13800-13842 Castle), covering report years 2023–2024. Its ENERGY STAR score went from 61 in 2023 to 64 in 2024 (+3 points). Site EUI moved from 57.1 kBtu/ft² (2023) to 58.3 kBtu/ft² (2024), an 2% increase. Reported emissions went from 883 tCO₂e to 909 tCO₂e over the same span (up 3%).
What does an ENERGY STAR score of 64 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 64 means the building performs better than about 64% of its national peers. BuildingCensus bands the score into report-card grades; 64 falls in band C — below median (55–69). It sits 11 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. Windsor Court (13800-13842 Castle)'s 58.3 kBtu/ft² across 254,607 sq ft works out to about 14.8 billion Btu (4,350 MWh-equivalent) in 2024. Its source EUI of 92.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,332,884 kWh of electricity and 102,981 therms of natural gas for the year.
Which law requires Windsor Court (13800-13842 Castle) to report its energy use?
Windsor Court (13800-13842 Castle) 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:36482947:2024). 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 multifamily housing buildings in Montgomery County
- The Seasons Apartments· 254,308 sq ft · score 70 (B)
- The Galaxy Apartments (Gl33)· 251,640 sq ft · score 64 (C)
- Chase At Bethesda· 250,785 sq ft · score 84 (B)
- Hampshire Tower Apartments· 250,518 sq ft · score 66 (C)
- Washingtonian Tower· 249,678 sq ft · score 87 (A)
- 620 - Park Ritchie· 246,942 sq ft · score 77 (B)
- Multifamily Housing buildings in Montgomery County· 553 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 Windsor Court (13800-13842 Castle)'s energy grade?
Windsor Court (13800-13842 Castle) scores 64 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 Montgomery County disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Windsor Court (13800-13842 Castle) use?
Its 2024 site energy-use intensity was 58.3 kBtu/ft² (92.5 kBtu/ft² source) across 254,607 sq ft, including 1,332,884 kWh of electricity and 102,981 therms of natural gas.
What are Windsor Court (13800-13842 Castle)'s carbon emissions?
Windsor Court (13800-13842 Castle) reported 909 tCO₂e of greenhouse-gas emissions for 2024.
Where is Windsor Court (13800-13842 Castle)?
Windsor Court (13800-13842 Castle) is at 13800 Castle Blv, in Montgomery County, Maryland 20904.
How big is Windsor Court (13800-13842 Castle) and when was it built?
Windsor Court (13800-13842 Castle) has 254,607 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1975 as its year built. It is classed as multifamily housing.
Is Windsor Court (13800-13842 Castle) 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, “Windsor Court (13800-13842 Castle), Montgomery County, Maryland — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/montgomery-county/windsor-court-13800-13842-castle-15a5be00 (data as of October 2, 2026).