Bldg 42 - 655 S. Alton Way

How does Bldg 42 - 655 S. Alton Way compare with other multifamily housing buildings in Denver?

The latest disclosures cover 1,108 multifamily housing buildings in Denver, out of 3,287 buildings citywide. Bldg 42 - 655 S. Alton Way's ENERGY STAR score of 98 compares with an average of 78 across the 956 that report a score; it scores higher than 85% of them and lower than 10%. Its site EUI of 41.3 kBtu/ft² is about 28% below the average of 57.0 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 61,030 sq ft, it is about half of the average floor area of 126,139 sq ft for those buildings. It was built in 1969, 21 years earlier than the group's average year built (1990). 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 Bldg 42 - 655 S. Alton Way's energy performance changed over time?

BuildingCensus holds 3 Denver disclosures for Bldg 42 - 655 S. Alton Way, covering report years 2021–2023. Its ENERGY STAR score went from 93 in 2021 to 98 in 2023 (+5 points). Site EUI moved from 49.9 kBtu/ft² (2021) to 41.3 kBtu/ft² (2023), a 17% decrease. Reported emissions went from 230 tCO₂e to 194 tCO₂e over the same span (down 16%).

What does an ENERGY STAR score of 98 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 98 means the building performs better than about 98% of its national peers. BuildingCensus bands the score into report-card grades; 98 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 Denver, 54% 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. Bldg 42 - 655 S. Alton Way's 41.3 kBtu/ft² across 61,030 sq ft works out to about 2.5 billion Btu (739 MWh-equivalent) in 2023. The disclosure also reports 173,707 kWh of electricity and 19,268 therms of natural gas for the year.

Which law requires Bldg 42 - 655 S. Alton Way to report its energy use?

Bldg 42 - 655 S. Alton Way reports under the Energize Denver Building Performance Policy, the legal basis of Denver's Energize Denver Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2023 disclosure (source record denver:5770:2023). Energize Denver sets energy-use (EUI) targets for buildings of 25,000+ sq ft — for most buildings an interim target in 2028 and a final target in 2032 — with civil penalties of roughly $0.15–0.35 per kBtu over target for non-compliance.