10 Rittenhouse Square
Multifamily Housing in Philadelphia, PA · 130 S 18th St. · 19103
At a glance
10 Rittenhouse Square is a 2,560-square-foot multifamily housing building at 130 S 18th St. in Philadelphia, Pennsylvania, built in 2009. In its 2024 Philadelphia benchmarking disclosure it reported an ENERGY STAR score of 21 out of 100 (grade D), a site energy-use intensity of 64.2 kBtu/ft² and 2,159 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 | 21 (band D) |
| Site EUI | 64.2 kBtu/ft² |
| Source EUI | 131.0 kBtu/ft² |
| GHG emissions | 2,159 tCO₂e |
| GHG intensity | — |
| Electricity | 4,439,463 kWh |
| Natural gas | 32,176 therms |
| Water use | 12,593 kgal |
| Gross floor area | 2,560 sq ft |
| Source record | philadelphia:4961098:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 21 | +6 | 64.2 kBtu/ft² | 2,159 tCO₂e |
| 2023 | 15 | -5 | 61.9 kBtu/ft² | 2,142 tCO₂e |
| 2022 | 20 | -4 | 67.0 kBtu/ft² | 2,254 tCO₂e |
| 2021 | 24 | +6 | 63.3 kBtu/ft² | 2,385 tCO₂e |
| 2020 | 18 | 59.0 kBtu/ft² | 2,323 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
- 130 S 18th St.
- City
- Philadelphia
- State
- Pennsylvania
- ZIP
- 19103
- Coordinates
- 39.95070, -75.17103
Within ~1 km
Nearby benchmarked buildings
- pen03067 1800 Arch Streetscore 60
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- Two Liberty Placescore 73
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- Two Liberty Placescore 88
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- 1500 Locustscore 93
Multifamily Housing · 887,048 sq ft
- APF - 1601 Market Streetscore 73
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- Sheraton Philadelphia Downtownscore 68
Hotel · 696,348 sq ft
See also: most efficient in Philadelphia · biggest emitters
How has 10 Rittenhouse Square's energy performance changed over time?
BuildingCensus holds 5 Philadelphia disclosures for 10 Rittenhouse Square, covering report years 2020–2024. Its ENERGY STAR score went from 18 in 2020 to 21 in 2024 (+3 points); its best year on file was 2021, at 24. Site EUI moved from 59.0 kBtu/ft² (2020) to 61.9 kBtu/ft² (2023), an 5% increase. Reported emissions went from 2,323 tCO₂e to 2,142 tCO₂e over the same span (down 8%).
What does an ENERGY STAR score of 21 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 21 means the building performs better than about 21% of its national peers. BuildingCensus bands the score into report-card grades; 21 falls in band D — lowest band (1–54). It sits 54 points below 75, the threshold for ENERGY STAR certification. In Philadelphia, 35% of scored buildings are at 75 or above.
Which law requires 10 Rittenhouse Square to report its energy use?
10 Rittenhouse Square 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:4961098:2024). 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
- (PA2407) - Old City 108 Condominiums (108 Arch St.)· 2,556 sq ft · score 46 (D)
- 227-31 South 6th Street· 2,306 sq ft
- 2100 Hamilton· 2,125 sq ft · score 2 (D)
- Garden Court Condominium Association· 2,071 sq ft · score 29 (D)
- 1900 Rittenhouse Square· 2,025 sq ft
- York Square Condominium Association· 1,898 sq ft · score 92 (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 10 Rittenhouse Square's energy grade?
10 Rittenhouse Square scores 21 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 Philadelphia disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 10 Rittenhouse Square use?
Its 2024 site energy-use intensity was 64.2 kBtu/ft² (131.0 kBtu/ft² source) across 2,560 sq ft, including 4,439,463 kWh of electricity and 32,176 therms of natural gas.
What are 10 Rittenhouse Square's carbon emissions?
10 Rittenhouse Square reported 2,159 tCO₂e of greenhouse-gas emissions for 2024.
Where is 10 Rittenhouse Square?
10 Rittenhouse Square is at 130 S 18th St., in Philadelphia, Pennsylvania 19103. Its coordinates are 39.95070, -75.17103 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 10 Rittenhouse Square and when was it built?
10 Rittenhouse Square has 2,560 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2009 as its year built. It is classed as multifamily housing.
Is 10 Rittenhouse Square 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, “10 Rittenhouse Square, Philadelphia, Pennsylvania — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/philadelphia/10-rittenhouse-square-73972da0 (data as of July 9, 2026).