Arch Street Exchange Condominium

How does Arch Street Exchange Condominium compare with other multifamily housing buildings in Philadelphia?

The latest disclosures cover 768 multifamily housing buildings in Philadelphia, out of 2,379 buildings citywide. Arch Street Exchange Condominium's ENERGY STAR score of 97 compares with an average of 59 across the 682 that report a score; it scores higher than 88% of them and lower than 11%. Its site EUI of 31.5 kBtu/ft² is about 43% below the average of 55.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group.

At 5,170 sq ft, it is about 96% below the average floor area of 125,469 sq ft for those buildings. It was built in 1912, 59 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 Arch Street Exchange Condominium's energy performance changed over time?

BuildingCensus holds 4 Philadelphia disclosures for Arch Street Exchange Condominium, covering report years 2020, 2021, 2023, 2024. Its ENERGY STAR score went from 100 in 2020 to 97 in 2024 (-3 points); its best year on file was 2020, at 100. Site EUI moved from 20.5 kBtu/ft² (2020) to 31.5 kBtu/ft² (2024), an 54% increase. Reported emissions went from 116 tCO₂e to 140 tCO₂e over the same span (up 21%).

What does an ENERGY STAR score of 97 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 97 means the building performs better than about 97% of its national peers. BuildingCensus bands the score into report-card grades; 97 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 Philadelphia, 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. Arch Street Exchange Condominium's 31.5 kBtu/ft² across 5,170 sq ft works out to about 0.2 billion Btu (48 MWh-equivalent) in 2024. Its source EUI of 65.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 329,056 kWh of electricity, 7,848 therms of natural gas and 1,361 thousand gallons of water for the year.

Which law requires Arch Street Exchange Condominium to report its energy use?

Arch Street Exchange Condominium reports under Phila. Code §9-3402 / Building Energy Performance Program, the legal basis of Philadelphia'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 philadelphia:5032929:2024). Philadelphia requires commercial and multifamily buildings of 50,000+ sq ft to benchmark annually; its Building Energy Performance Program additionally requires non-residential buildings of 50,000+ sq ft to complete a tune-up or certify as high-performance every five years, with fines starting at $2,000 for non-compliance.