Windsor Bethesda

How does Windsor Bethesda 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 Bethesda's ENERGY STAR score of 72 compares with an average of 80 across the 514 that report a score; it scores higher than 24% of them and lower than 75%. Its site EUI of 40.1 kBtu/ft² is roughly in line with the average of 43.2 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 303,793 sq ft, it is about 53% above the average floor area of 198,668 sq ft for those buildings. It was built in 2015, 26 years later 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 Bethesda's energy performance changed over time?

BuildingCensus holds 2 Montgomery County disclosures for Windsor Bethesda, covering report years 2023–2024. Its ENERGY STAR score was 72 in both 2023 and 2024. Site EUI moved from 39.0 kBtu/ft² (2023) to 40.1 kBtu/ft² (2024), an 3% increase. Reported emissions went from 914 tCO₂e to 933 tCO₂e over the same span (up 2%).

What does an ENERGY STAR score of 72 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 72 means the building performs better than about 72% of its national peers. BuildingCensus bands the score into report-card grades; 72 falls in band B — above median (70–84). It sits 3 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 Bethesda's 40.1 kBtu/ft² across 303,793 sq ft works out to about 12.2 billion Btu (3,570 MWh-equivalent) in 2024. Its source EUI of 89.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,420,306 kWh of electricity and 39,179 therms of natural gas for the year.

Which law requires Windsor Bethesda to report its energy use?

Windsor Bethesda 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:14888952:2024). 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.