315 Arch Flats
Multifamily Housing in Philadelphia, PA · 315 Arch Street · 19106
At a glance
315 Arch Flats is a 9,373-square-foot multifamily housing building at 315 Arch Street in Philadelphia, Pennsylvania, built in 1900. In its 2024 Philadelphia benchmarking disclosure it reported an ENERGY STAR score of 87 out of 100 (grade A), a site energy-use intensity of 33.4 kBtu/ft² and 158 tCO₂e of greenhouse-gas emissions. That score is higher than 72% of the 682 scored multifamily housing buildings in Philadelphia.
Phila. Code §9-3402 / Building Energy Performance Program · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 87 (band A) |
| Site EUI | 33.4 kBtu/ft² |
| Source EUI | 91.8 kBtu/ft² |
| GHG emissions | 158 tCO₂e |
| GHG intensity | — |
| Electricity | 570,376 kWh |
| Natural gas | 577 therms |
| Water use | 248 kgal |
| Gross floor area | 9,373 sq ft |
| Source record | philadelphia:33532240:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 87 | -5 | 33.4 kBtu/ft² | 158 tCO₂e |
| 2023 | 92 | 29.8 kBtu/ft² | 158 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
- 315 Arch Street
- City
- Philadelphia
- State
- Pennsylvania
- ZIP
- 19106
- Coordinates
- 39.95266, -75.14588
Within ~1 km
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See also: most efficient in Philadelphia · biggest emitters
How does 315 Arch Flats compare with other multifamily housing buildings in Philadelphia?
The latest disclosures cover 768 multifamily housing buildings in Philadelphia, out of 2,379 buildings citywide. 315 Arch Flats's ENERGY STAR score of 87 compares with an average of 59 across the 682 that report a score; it scores higher than 72% of them and lower than 27%. Its site EUI of 33.4 kBtu/ft² is about 40% below the average of 55.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 9,373 sq ft, it is about 93% below the average floor area of 125,469 sq ft for those buildings. It was built in 1900, 71 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 315 Arch Flats's energy performance changed over time?
BuildingCensus holds 2 Philadelphia disclosures for 315 Arch Flats, covering report years 2023–2024. Its ENERGY STAR score went from 92 in 2023 to 87 in 2024 (-5 points); its best year on file was 2023, at 92. Site EUI moved from 29.8 kBtu/ft² (2023) to 33.4 kBtu/ft² (2024), an 12% increase. Reported emissions went from 158 tCO₂e to 158 tCO₂e over the same span (down 0%).
What does an ENERGY STAR score of 87 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 87 means the building performs better than about 87% of its national peers. BuildingCensus bands the score into report-card grades; 87 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. 315 Arch Flats's 33.4 kBtu/ft² across 9,373 sq ft works out to about 0.3 billion Btu (92 MWh-equivalent) in 2024. Its source EUI of 91.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 570,376 kWh of electricity, 577 therms of natural gas and 248 thousand gallons of water for the year.
Which law requires 315 Arch Flats to report its energy use?
315 Arch Flats 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:33532240:2024). 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.
More multifamily housing buildings in Philadelphia
- (PA2345) - Arts Condominium (1324 Locust Street)· 9,015 sq ft · score 45 (D)
- Spring Garden Apartments· 8,152 sq ft · score 8 (D)
- (PA2497) - 410 South Hill Condominium (410 South Front Street )· 6,148 sq ft · score 32 (D)
- Arch Street Exchange Condominium· 5,170 sq ft · score 97 (A)
- Western Union Building· 4,963 sq ft · score 28 (D)
- The Lanesborough· 3,513 sq ft · score 97 (A)
- 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 315 Arch Flats's energy grade?
315 Arch Flats scores 87 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 Philadelphia disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 315 Arch Flats use?
Its 2024 site energy-use intensity was 33.4 kBtu/ft² (91.8 kBtu/ft² source) across 9,373 sq ft, including 570,376 kWh of electricity and 577 therms of natural gas.
What are 315 Arch Flats's carbon emissions?
315 Arch Flats reported 158 tCO₂e of greenhouse-gas emissions for 2024.
Where is 315 Arch Flats?
315 Arch Flats is at 315 Arch Street, in Philadelphia, Pennsylvania 19106. Its coordinates are 39.95266, -75.14588 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 315 Arch Flats and when was it built?
315 Arch Flats has 9,373 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1900 as its year built. It is classed as multifamily housing.
Is 315 Arch Flats covered by Phila. Code §9-3402 / Building Energy Performance Program?
Yes — it appears in the 2024 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, “315 Arch Flats, Philadelphia, Pennsylvania — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/philadelphia/315-arch-flats-f7f16a57 (data as of July 9, 2026).