Casa Iris Apartments

How does Casa Iris Apartments compare with other senior living community buildings in Washington, DC?

The latest disclosures cover 17 senior living community buildings in Washington, DC, out of 6,870 buildings citywide. Casa Iris Apartments's ENERGY STAR score of 99 compares with an average of 65 across the 15 that report a score; it scores higher than 80% of them. Its site EUI of 50.1 kBtu/ft² is about half of the average of 91.8 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.0 kgCO₂e/ft² is about 39% below the group average of 6.5 kgCO₂e/ft².

At 32,000 sq ft, it is about 71% below the average floor area of 111,527 sq ft for those buildings. It was built in 2007, 44 years later than the group's average year built (1963). Across all 24 jurisdictions BuildingCensus covers, the 1,181 senior living community buildings average an ENERGY STAR score of 71 and a site EUI of 73.6 kBtu/ft².

How has Casa Iris Apartments's energy performance changed over time?

BuildingCensus holds 6 Washington, DC disclosures for Casa Iris Apartments, covering report years 2015, 2017, 2021, 2022, 2023, 2024. Its ENERGY STAR score went from 100 in 2015 to 99 in 2024 (-1 points); its best year on file was 2015, at 100. Site EUI moved from 5.8 kBtu/ft² (2015) to 50.1 kBtu/ft² (2024), an 764% increase. Reported emissions went from 175 tCO₂e to 127 tCO₂e over the same span (down 28%).

What does an ENERGY STAR score of 99 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 99 means the building performs better than about 99% of its national peers. BuildingCensus bands the score into report-card grades; 99 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. Casa Iris Apartments's 50.1 kBtu/ft² across 32,000 sq ft works out to about 1.6 billion Btu (470 MWh-equivalent) in 2024. Its source EUI of 118.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 352,272 kWh of electricity, 4,028 therms of natural gas and 3,735 thousand gallons of water for the year.

Which law requires Casa Iris Apartments to report its energy use?

Casa Iris Apartments 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 2024 disclosure (source record dc:PM5010127:2024). 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.