Penn South
Multifamily Housing in New York City, NY · 321 Eighth Ave · 10001
At a glance
Penn South is a 3,391,963-square-foot multifamily housing building at 321 Eighth Ave in New York City, New York, built in 1960. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 95 out of 100 (grade A), a site energy-use intensity of 68.3 kBtu/ft² and 14,116 tCO₂e of greenhouse-gas emissions. That score is higher than 83% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 95 (band A) |
| Site EUI | 68.3 kBtu/ft² |
| Source EUI | 76.3 kBtu/ft² |
| GHG emissions | 14,116 tCO₂e |
| GHG intensity | 4.2 kgCO₂e/ft² |
| Electricity | 3,010,154 kWh |
| Natural gas | 1,652,876 therms |
| Gross floor area | 3,391,963 sq ft |
| Source record | nyc:3616164:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 95 | +9 | 68.3 kBtu/ft² | 14,116 tCO₂e |
| 2023 | 86 | +3 | 79.6 kBtu/ft² | 15,249 tCO₂e |
| 2022 | 83 | 90.0 kBtu/ft² | 18,035 tCO₂e |
Compliance context
Local Law 84 (LL84)
Under Local Law 97, buildings over 25,000 sq ft face carbon caps with fines of $268 per metric ton of CO₂e over the limit, phasing in from 2024.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 321 Eighth Ave
- City
- New York City
- State
- New York
- ZIP
- 10001
- Coordinates
- 40.74712, -73.99718
Within ~1 km
Nearby benchmarked buildings
- Hudson Yards Cogen Campusscore —
Other · 7,739,076 sq ft
- Manhattan Westscore —
Other · 4,153,954 sq ft
- 20-30 Hudson Yardsscore —
Office · 3,810,623 sq ft
- 50 Hudson Yardsscore 76
Office · 2,944,455 sq ft
- The Spiral - 66 Hudson Boulevardscore 82
Office · 2,830,000 sq ft
- PENN 1 (LL97)score —
Office · 2,488,353 sq ft
See also: most efficient in New York City · biggest emitters
How does Penn South compare with other multifamily housing buildings in New York City?
The latest disclosures cover 33,022 multifamily housing buildings in New York City, out of 48,310 buildings citywide. Penn South's ENERGY STAR score of 95 compares with an average of 63 across the 22,829 that report a score; it scores higher than 83% of them and lower than 16%. Its site EUI of 68.3 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.2 kgCO₂e/ft² is about 20% below the group average of 5.2 kgCO₂e/ft².
At 3,391,963 sq ft, it is about 3260% above the average floor area of 100,951 sq ft for those buildings. It was built in 1960, 8 years later than the group's average year built (1952). 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 Penn South's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Penn South, covering report years 2022–2024. Its ENERGY STAR score went from 83 in 2022 to 95 in 2024 (+12 points). Site EUI moved from 90.0 kBtu/ft² (2022) to 68.3 kBtu/ft² (2024), a 24% decrease. Reported emissions went from 18,035 tCO₂e to 14,116 tCO₂e over the same span (down 22%).
What does an ENERGY STAR score of 95 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 95 means the building performs better than about 95% of its national peers. BuildingCensus bands the score into report-card grades; 95 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 New York City, 43% 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. Penn South's 68.3 kBtu/ft² across 3,391,963 sq ft works out to about 231.7 billion Btu (67,896 MWh-equivalent) in 2024. Its source EUI of 76.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,010,154 kWh of electricity and 1,652,876 therms of natural gas for the year.
Which law requires Penn South to report its energy use?
Penn South reports under Local Law 84 (LL84), the legal basis of New York City's Energy and Water Data Disclosure program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record nyc:3616164:2024). Under Local Law 97, buildings over 25,000 sq ft face carbon caps with fines of $268 per metric ton of CO₂e over the limit, phasing in from 2024.
More multifamily housing buildings in New York City
- Parkchester South - 2039437501· 3,227,853 sq ft · score 100 (A)
- Queens Fresh Meadows (Parent)· 3,183,550 sq ft · score 100 (A)
- Lindsay Park· 3,136,278 sq ft · score 100 (A)
- BOULEVARD/LINDEN· 3,117,306 sq ft
- BOULEVARD/LINDEN CAMPUS· 3,117,306 sq ft · score 100 (A)
- Alvic Property Management:1701 ALBEMARLE ROAD· 3,117,085 sq ft · score 100 (A)
- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
- Most efficient large buildings in New York City
- Least efficient large buildings in New York City
- Biggest emitters in New York City
Frequently asked questions
What is Penn South's energy grade?
Penn South scores 95 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Penn South use?
Its 2024 site energy-use intensity was 68.3 kBtu/ft² (76.3 kBtu/ft² source) across 3,391,963 sq ft, including 3,010,154 kWh of electricity and 1,652,876 therms of natural gas.
What are Penn South's carbon emissions?
Penn South reported 14,116 tCO₂e of greenhouse-gas emissions (4.2 kgCO₂e/ft²) for 2024.
Where is Penn South?
Penn South is at 321 Eighth Ave, in New York City, New York 10001. Its coordinates are 40.74712, -73.99718 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Penn South and when was it built?
Penn South has 3,391,963 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1960 as its year built. It is classed as multifamily housing.
Is Penn South covered by Local Law 84 (LL84)?
Yes — it appears in the 2024 Energy and Water Data Disclosure disclosure, which lists the buildings reporting under Local Law 84 (LL84).
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About this data
Source: Energy and Water Data Disclosure (Local Law 84 (LL84)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Penn South, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/penn-south-4a1c54f4 (data as of October 2, 2026).