HSS - Caspary Research Center (Pavilion)
Medical Office in New York City, NY · 541 E 71st Street · 10021
At a glance
HSS - Caspary Research Center (Pavilion) is a 79,234-square-foot medical office at 541 E 71st Street in New York City, New York, built in 1939. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 1 out of 100 (grade D), a site energy-use intensity of 240.0 kBtu/ft² and 1,780 tCO₂e of greenhouse-gas emissions. That score is higher than 0% of the 147 scored medical office buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 1 (band D) |
| Site EUI | 240.0 kBtu/ft² |
| Source EUI | 502.8 kBtu/ft² |
| GHG emissions | 1,780 tCO₂e |
| GHG intensity | 22.5 kgCO₂e/ft² |
| Electricity | 3,113,642 kWh |
| Water use | 1,796 kgal |
| Gross floor area | 79,234 sq ft |
| Source record | nyc:4406842:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 1 | ±0 | 240.0 kBtu/ft² | 1,780 tCO₂e |
| 2023 | 1 | 287.4 kBtu/ft² | 1,989 tCO₂e | |
| 2022 | — | 157.7 kBtu/ft² | 1,048 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
- 541 E 71st Street
- City
- New York City
- State
- New York
- ZIP
- 10021
- Coordinates
- 40.76573, -73.95320
Within ~1 km
Nearby benchmarked buildings
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Hospital (General Medical & Surgical) · 2,801,795 sq ft
Other - Specialty Hospital · 2,490,355 sq ft
Mixed Use Property · 2,437,399 sq ft
- Weill Cornell Medical Centerscore —
Hospital (General Medical & Surgical) · 2,405,480 sq ft
Laboratory · 1,862,814 sq ft
Laboratory · 1,546,119 sq ft
See also: most efficient in New York City · biggest emitters
How does HSS - Caspary Research Center (Pavilion) compare with other medical office buildings in New York City?
The latest disclosures cover 188 medical office buildings in New York City, out of 48,310 buildings citywide. HSS - Caspary Research Center (Pavilion)'s ENERGY STAR score of 1 compares with an average of 65 across the 147 that report a score; it scores higher than 0% of them and lower than 93%. Its site EUI of 240.0 kBtu/ft² is about 146% above the average of 97.6 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 22.5 kgCO₂e/ft² is about 155% above the group average of 8.8 kgCO₂e/ft².
At 79,234 sq ft, it is roughly in line with the average floor area of 75,019 sq ft for those buildings. It was built in 1939, 26 years earlier than the group's average year built (1965). Across all 24 jurisdictions BuildingCensus covers, the 1,266 medical office buildings average an ENERGY STAR score of 64 and a site EUI of 92.2 kBtu/ft².
How has HSS - Caspary Research Center (Pavilion)'s energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for HSS - Caspary Research Center (Pavilion), covering report years 2022–2024. Its ENERGY STAR score was 1 in both 2023 and 2024. Site EUI moved from 157.7 kBtu/ft² (2022) to 240.0 kBtu/ft² (2024), an 52% increase. Reported emissions went from 1,048 tCO₂e to 1,780 tCO₂e over the same span (up 70%).
What does an ENERGY STAR score of 1 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: 1 is the bottom of the scale. BuildingCensus bands the score into report-card grades; 1 falls in band D — lowest band (1–54). It sits 74 points below 75, the threshold for ENERGY STAR certification. 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. HSS - Caspary Research Center (Pavilion)'s 240.0 kBtu/ft² across 79,234 sq ft works out to about 19 billion Btu (5,573 MWh-equivalent) in 2024. Its source EUI of 502.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,113,642 kWh of electricity and 1,796 thousand gallons of water for the year.
Which law requires HSS - Caspary Research Center (Pavilion) to report its energy use?
HSS - Caspary Research Center (Pavilion) 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:4406842:2024). 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 medical office buildings in New York City
- 1695 Eastchester Rd· 79,098 sq ft · score 55 (C)
- 21 Audubon Avenue· 77,500 sq ft · score 72 (B)
- Queens Family Medical Center· 75,000 sq ft
- H+H_4312_East New York Diagnostic & Treatment Center· 72,755 sq ft · score 9 (D)
- 23-25 31 Street· 72,000 sq ft · score 99 (A)
- Walter Samuels - 30 E 40th (28 EAST 40 STREET)· 71,063 sq ft · EUI 89.0 kBtu/ft²
- Medical Office buildings in New York City· 188 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 HSS - Caspary Research Center (Pavilion)'s energy grade?
HSS - Caspary Research Center (Pavilion) scores 1 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does HSS - Caspary Research Center (Pavilion) use?
Its 2024 site energy-use intensity was 240.0 kBtu/ft² (502.8 kBtu/ft² source) across 79,234 sq ft, including 3,113,642 kWh of electricity.
What are HSS - Caspary Research Center (Pavilion)'s carbon emissions?
HSS - Caspary Research Center (Pavilion) reported 1,780 tCO₂e of greenhouse-gas emissions (22.5 kgCO₂e/ft²) for 2024.
Where is HSS - Caspary Research Center (Pavilion)?
HSS - Caspary Research Center (Pavilion) is at 541 E 71st Street, in New York City, New York 10021. Its coordinates are 40.76573, -73.95320 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is HSS - Caspary Research Center (Pavilion) and when was it built?
HSS - Caspary Research Center (Pavilion) has 79,234 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1939 as its year built. It is classed as medical office.
Is HSS - Caspary Research Center (Pavilion) 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, “HSS - Caspary Research Center (Pavilion), New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/hss-caspary-research-center-pavilion-d7d1ac62 (data as of October 2, 2026).