(IL1041) - Marina Towers (300 N State St)

How does (IL1041) - Marina Towers (300 N State St) compare with other multifamily housing buildings in Chicago?

The latest disclosures cover 1,515 multifamily housing buildings in Chicago, out of 3,852 buildings citywide. (IL1041) - Marina Towers (300 N State St)'s ENERGY STAR score of 81 compares with an average of 62 across the 1,472 that report a score; it scores higher than 67% of them and lower than 31%. Its site EUI of 37.8 kBtu/ft² is about half of the average of 72.0 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 5.3 kgCO₂e/ft² is roughly in line with the group average of 5.8 kgCO₂e/ft².

At 794,774 sq ft, it is about 286% above the average floor area of 206,097 sq ft for those buildings. It was built in 1960, 11 years earlier than the group's average year built (1971). 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 (IL1041) - Marina Towers (300 N State St)'s energy performance changed over time?

BuildingCensus holds 9 Chicago disclosures for (IL1041) - Marina Towers (300 N State St), covering report years 2015–2023. Its ENERGY STAR score went from 43 in 2015 to 81 in 2023 (+38 points); its best year on file was 2020, at 100. Site EUI moved from 45.9 kBtu/ft² (2015) to 37.8 kBtu/ft² (2023), a 18% decrease. Reported emissions went from 7,142 tCO₂e to 4,207 tCO₂e over the same span (down 41%).

What does an ENERGY STAR score of 81 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 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 falls in band B — above median (70–84). 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 Chicago, 35% 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. (IL1041) - Marina Towers (300 N State St)'s 37.8 kBtu/ft² across 794,774 sq ft works out to about 30 billion Btu (8,805 MWh-equivalent) in 2023. Its source EUI of 105.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 8,812,113 kWh of electricity for the year.

Which law requires (IL1041) - Marina Towers (300 N State St) to report its energy use?

(IL1041) - Marina Towers (300 N State St) reports under the Building Energy Use Benchmarking Ordinance, the legal basis of the Chicago Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2023 disclosure (source record chicago:239096:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.