The Marlyn Condominiums

How does The Marlyn Condominiums compare with other multifamily housing buildings in Washington, DC?

The latest disclosures cover 1,799 multifamily housing buildings in Washington, DC, out of 6,870 buildings citywide. The Marlyn Condominiums's ENERGY STAR score of 72 compares with an average of 72 across the 1,618 that report a score; it scores higher than 40% of them and lower than 59%. Its site EUI of 52.8 kBtu/ft² is roughly in line with the average of 51.1 kBtu/ft². Its emissions intensity of 3.6 kgCO₂e/ft² is roughly in line with the group average of 3.8 kgCO₂e/ft².

At 128,700 sq ft, it is roughly in line with the average floor area of 136,346 sq ft for those buildings. It was built in 1938, 27 years earlier than the group's average year built (1965). 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 The Marlyn Condominiums's energy performance changed over time?

BuildingCensus holds 7 Washington, DC disclosures for The Marlyn Condominiums, covering report years 2013–2019. Its ENERGY STAR score went from 98 in 2013 to 72 in 2019 (-26 points); its best year on file was 2013, at 98. Site EUI moved from 26.0 kBtu/ft² (2013) to 52.8 kBtu/ft² (2019), an 103% increase. Reported emissions went from 318 tCO₂e to 460 tCO₂e over the same span (up 45%).

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 Washington, DC, 47% 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. The Marlyn Condominiums's 52.8 kBtu/ft² across 128,700 sq ft works out to about 6.8 billion Btu (1,992 MWh-equivalent) in 2019. Its source EUI of 87.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 678,856 kWh of electricity, 44,842 therms of natural gas and 2,109 thousand gallons of water for the year.

Which law requires The Marlyn Condominiums to report its energy use?

The Marlyn Condominiums reports under the Clean and Affordable Energy Act / BEPS, the legal basis of Washington, DC's Building Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2019 disclosure (source record dc:PM5837742:2019). DC's Building Energy Performance Standards (BEPS) require buildings below the performance standard to improve over compliance cycles (the first ends December 31, 2026; later cycles run five years), with penalties for buildings that fail to meet their pathway.