1518 Walnut Street
Office in Philadelphia, PA · 19102
At a glance
1518 Walnut Street is a 103,560-square-foot office building in Philadelphia, Pennsylvania, built in 1929. In its 2020 Philadelphia benchmarking disclosure it reported an ENERGY STAR score of 81 out of 100 (grade B), a site energy-use intensity of 72.7 kBtu/ft² and 571 tCO₂e of greenhouse-gas emissions. That score is higher than 76% of the 180 scored office buildings in Philadelphia.
Phila. Code §9-3402 / Building Energy Performance Program · reporting year 2020
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 81 (band B) |
| Site EUI | 72.7 kBtu/ft² |
| Source EUI | 125.3 kBtu/ft² |
| GHG emissions | 571 tCO₂e |
| GHG intensity | — |
| Electricity | 722,203 kWh |
| Natural gas | 733 therms |
| Water use | 1,227 kgal |
| Gross floor area | 103,560 sq ft |
| Source record | philadelphia:3938855:2020 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2020latest | 81 | +2 | 72.7 kBtu/ft² | 571 tCO₂e |
| 2019 | 79 | 74.7 kBtu/ft² | 621 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
- 1518 Walnut Street
- City
- Philadelphia
- State
- Pennsylvania
- ZIP
- 19102
- Coordinates
- 39.94940, -75.16693
Within ~1 km
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See also: most efficient in Philadelphia · biggest emitters
How does 1518 Walnut Street compare with other office buildings in Philadelphia?
The latest disclosures cover 212 office buildings in Philadelphia, out of 2,379 buildings citywide. 1518 Walnut Street's ENERGY STAR score of 81 compares with an average of 64 across the 180 that report a score; it scores higher than 76% of them and lower than 23%. Its site EUI of 72.7 kBtu/ft² is roughly in line with the average of 78.3 kBtu/ft² — it uses less energy per square foot than the typical building in that group.
At 103,560 sq ft, it is about 65% below the average floor area of 292,223 sq ft for those buildings. It was built in 1929, 28 years earlier than the group's average year built (1957). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 1518 Walnut Street's energy performance changed over time?
BuildingCensus holds 2 Philadelphia disclosures for 1518 Walnut Street, covering report years 2019–2020. Its ENERGY STAR score went from 79 in 2019 to 81 in 2020 (+2 points). Site EUI moved from 74.7 kBtu/ft² (2019) to 72.7 kBtu/ft² (2020), a 3% decrease. Reported emissions went from 621 tCO₂e to 571 tCO₂e over the same span (down 8%).
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 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. 1518 Walnut Street's 72.7 kBtu/ft² across 103,560 sq ft works out to about 7.5 billion Btu (2,206 MWh-equivalent) in 2020. Its source EUI of 125.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 722,203 kWh of electricity, 733 therms of natural gas and 1,227 thousand gallons of water for the year.
Which law requires 1518 Walnut Street to report its energy use?
1518 Walnut Street 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 2020 disclosure (source record philadelphia:3938855:2020). 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 office buildings in Philadelphia
- Steven Eizen· 101,000 sq ft · score 1 (D)
- The Philadelphia Design Building· 98,597 sq ft · score 74 (B)
- Medical Tower Building· 95,000 sq ft · score 68 (C)
- 3000 Market Street· 90,999 sq ft · EUI 34.0 kBtu/ft²
- PeiGenesis· 90,000 sq ft · EUI 99.7 kBtu/ft²
- 1 Crescent Drive· 82,240 sq ft · score 82 (B)
- Office buildings in Philadelphia· 212 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 1518 Walnut Street's energy grade?
1518 Walnut Street scores 81 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2020 Philadelphia disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1518 Walnut Street use?
Its 2020 site energy-use intensity was 72.7 kBtu/ft² (125.3 kBtu/ft² source) across 103,560 sq ft, including 722,203 kWh of electricity and 733 therms of natural gas.
What are 1518 Walnut Street's carbon emissions?
1518 Walnut Street reported 571 tCO₂e of greenhouse-gas emissions for 2020.
Where is 1518 Walnut Street?
1518 Walnut Street is in Philadelphia, Pennsylvania 19102. Its coordinates are 39.94940, -75.16693 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1518 Walnut Street and when was it built?
1518 Walnut Street has 103,560 sq ft of gross floor area, as reported in its 2020 disclosure. The disclosure lists 1929 as its year built. It is classed as office.
Is 1518 Walnut Street covered by Phila. Code §9-3402 / Building Energy Performance Program?
Yes — it appears in the 2020 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, “1518 Walnut Street, Philadelphia, Pennsylvania — 2020 benchmarking disclosure”, https://buildingcensus.com/buildings/philadelphia/1518-walnut-street-a8338627 (data as of July 9, 2026).