Astor
Multifamily Housing in Philadelphia, PA · 123 S. 39th St · 19104
At a glance
Astor is a 19,736-square-foot multifamily housing building at 123 S. 39th St in Philadelphia, Pennsylvania, built in 1920. In its 2021 Philadelphia benchmarking disclosure it reported a site energy-use intensity of 98.8 kBtu/ft² and 106 tCO₂e of greenhouse-gas emissions.
Phila. Code §9-3402 / Building Energy Performance Program · reporting year 2021
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 98.8 kBtu/ft² |
| Source EUI | 109.2 kBtu/ft² |
| GHG emissions | 106 tCO₂e |
| GHG intensity | — |
| Electricity | 18,013 kWh |
| Natural gas | 18,882 therms |
| Water use | 1,573,434 kgal |
| Gross floor area | 19,736 sq ft |
| Source record | philadelphia:5932253:2021 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2021latest | — | 98.8 kBtu/ft² | 106 tCO₂e | |
| 2020 | — | 17.5 kBtu/ft² | 21 tCO₂e | |
| 2019 | — | 19.8 kBtu/ft² | 24 tCO₂e |
Compliance context
Phila. Code §9-3402 / Building Energy Performance Program
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.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 123 S. 39th St
- City
- Philadelphia
- State
- Pennsylvania
- ZIP
- 19104
- Coordinates
- 39.95436, -75.19989
Within ~1 km
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How does Astor compare with other multifamily housing buildings in Philadelphia?
The latest disclosures cover 768 multifamily housing buildings in Philadelphia, out of 2,379 buildings citywide. Its site EUI of 98.8 kBtu/ft² is about 78% above the average of 55.6 kBtu/ft² — it uses more energy per square foot than the typical building in that group.
At 19,736 sq ft, it is about 84% below the average floor area of 125,469 sq ft for those buildings. It was built in 1920, 51 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 Astor's energy performance changed over time?
BuildingCensus holds 3 Philadelphia disclosures for Astor, covering report years 2019–2021. Site EUI moved from 19.8 kBtu/ft² (2019) to 98.8 kBtu/ft² (2021), an 399% increase. Reported emissions went from 24 tCO₂e to 106 tCO₂e over the same span (up 344%).
What does a site EUI of 98.8 kBtu/ft² mean?
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. Astor's 98.8 kBtu/ft² across 19,736 sq ft works out to about 1.9 billion Btu (571 MWh-equivalent) in 2021. Its source EUI of 109.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 18,013 kWh of electricity, 18,882 therms of natural gas and 1,573,434 thousand gallons of water for the year.
Which law requires Astor to report its energy use?
Astor 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 2021 disclosure (source record philadelphia:5932253:2021). 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.
More multifamily housing buildings in Philadelphia
- 3400 J Street· 19,567 sq ft · score 20 (D)
- (PA2449) - Pier 5 COA (7 N. Columbus Blvd)· 17,316 sq ft · score 95 (A)
- 1401 Walnut Street· 16,559 sq ft · score 7 (D)
- Moravian Condos· 12,828 sq ft · score 16 (D)
- Wallingford Apts.· 11,620 sq ft · EUI 22.7 kBtu/ft²
- Rowan Judson B· 10,948 sq ft · EUI 13.4 kBtu/ft²
- Multifamily Housing buildings in Philadelphia· 768 benchmarked
- All Philadelphia benchmarked buildings· Phila. Code §9-3402 / Building Energy Performance Program
- Most efficient large buildings in Philadelphia
- Least efficient large buildings in Philadelphia
- Biggest emitters in Philadelphia
Frequently asked questions
What is Astor's energy grade?
Astor did not report an ENERGY STAR score in its 2021 disclosure, but its site energy-use intensity was 98.8 kBtu/ft².
How much energy does Astor use?
Its 2021 site energy-use intensity was 98.8 kBtu/ft² (109.2 kBtu/ft² source) across 19,736 sq ft, including 18,013 kWh of electricity and 18,882 therms of natural gas.
What are Astor's carbon emissions?
Astor reported 106 tCO₂e of greenhouse-gas emissions for 2021.
Where is Astor?
Astor is at 123 S. 39th St, in Philadelphia, Pennsylvania 19104. Its coordinates are 39.95436, -75.19989 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Astor and when was it built?
Astor has 19,736 sq ft of gross floor area, as reported in its 2021 disclosure. The disclosure lists 1920 as its year built. It is classed as multifamily housing.
Is Astor covered by Phila. Code §9-3402 / Building Energy Performance Program?
Yes — it appears in the 2021 Building Energy Benchmarking disclosure, which lists the buildings reporting under Phila. Code §9-3402 / Building Energy Performance Program.
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About this data
Source: Building Energy Benchmarking (Phila. Code §9-3402 / Building Energy Performance Program), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Astor, Philadelphia, Pennsylvania — 2021 benchmarking disclosure”, https://buildingcensus.com/buildings/philadelphia/astor-5d4b37ff (data as of July 9, 2026).