Hopkinson House
Multifamily Housing in Philadelphia, PA · 604 S Washington Square · 19106
At a glance
Hopkinson House is a 1,700-square-foot multifamily housing building at 604 S Washington Square in Philadelphia, Pennsylvania, built in 1963. In its 2024 Philadelphia benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 34.3 kBtu/ft² and 1,731 tCO₂e of greenhouse-gas emissions.
Some figures below are far outside what a multifamily housingof this size can use or emit — most likely a unit or entry error in the city's file. They are shown exactly as published and are left out of rankings and averages.
Phila. Code §9-3402 / Building Energy Performance Program · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 34.3 kBtu/ft² |
| Source EUI | 62.3 kBtu/ft² |
| GHG emissions | 1,731 tCO₂e |
| GHG intensity | — |
| Electricity | 3,440,500 kWh |
| Natural gas | 149,847 therms |
| Water use | 17,226 kgal |
| Gross floor area | 1,700 sq ft |
| Source record | philadelphia:4992110:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | ±0 | 34.3 kBtu/ft² | 1,731 tCO₂e |
| 2023 | 100 | ±0 | 33.5 kBtu/ft² | 1,781 tCO₂e |
| 2022 | 100 | ±0 | 38.3 kBtu/ft² | 2,034 tCO₂e |
| 2020 | 100 | ±0 | 33.6 kBtu/ft² | 1,919 tCO₂e |
| 2019 | 100 | 36.1 kBtu/ft² | 2,125 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
- 604 S Washington Square
- City
- Philadelphia
- State
- Pennsylvania
- ZIP
- 19106
- Coordinates
- 39.94592, -75.15232
Within ~1 km
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See also: most efficient in Philadelphia · biggest emitters
How has Hopkinson House's energy performance changed over time?
BuildingCensus holds 5 Philadelphia disclosures for Hopkinson House, covering report years 2019, 2020, 2022, 2023, 2024. Its ENERGY STAR score was 100 in both 2019 and 2024. Site EUI moved from 36.1 kBtu/ft² (2019) to 33.5 kBtu/ft² (2023), a 7% decrease. Reported emissions went from 2,125 tCO₂e to 1,781 tCO₂e over the same span (down 16%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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.
Which law requires Hopkinson House to report its energy use?
Hopkinson House 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:4992110:2024). 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
- Cobbs Creek: Cobbs Creek· 1,574 sq ft · score 50 (D)
- National at Old City Condominiums· 1,540 sq ft · score 97 (A)
- Murano Condominium ASN· 1,470 sq ft · score 57 (C)
- Old Shoe Factory Condominiums· 1,460 sq ft · score 48 (D)
- 250 South 17th Street· 1,450 sq ft
- The Philadelphian· 1,414 sq ft · score 86 (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 Hopkinson House's energy grade?
Hopkinson House scores 100 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 Hopkinson House use?
Its 2024 site energy-use intensity was 34.3 kBtu/ft² (62.3 kBtu/ft² source) across 1,700 sq ft, including 3,440,500 kWh of electricity and 149,847 therms of natural gas.
What are Hopkinson House's carbon emissions?
Hopkinson House reported 1,731 tCO₂e of greenhouse-gas emissions for 2024.
Where is Hopkinson House?
Hopkinson House is at 604 S Washington Square, in Philadelphia, Pennsylvania 19106. Its coordinates are 39.94592, -75.15232 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Hopkinson House and when was it built?
Hopkinson House has 1,700 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1963 as its year built. It is classed as multifamily housing.
Is Hopkinson House 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, “Hopkinson House, Philadelphia, Pennsylvania — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/philadelphia/hopkinson-house-dc6e30ee (data as of July 9, 2026).