Wallack - 625 Park Ave
Multifamily Housing in New York City, NY · 623 PARK AVENUE · 10065
At a glance
Wallack - 625 Park Ave is a 113,919-square-foot multifamily housing building at 623 PARK AVENUE in New York City, New York, built in 1929. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 91.5 kBtu/ft² and 845 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 91.5 kBtu/ft² |
| Source EUI | 168.2 kBtu/ft² |
| GHG emissions | 845 tCO₂e |
| GHG intensity | 7.4 kgCO₂e/ft² |
| Electricity | 1,374,907 kWh |
| Natural gas | 57,374 therms |
| Gross floor area | 113,919 sq ft |
| Source record | nyc:2656885:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 91.5 kBtu/ft² | 845 tCO₂e | |
| 2023 | — | 63.3 kBtu/ft² | 654 tCO₂e | |
| 2022 | — | 101.8 kBtu/ft² | 752 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
- 623 PARK AVENUE
- City
- New York City
- State
- New York
- ZIP
- 10065
- Coordinates
- 40.76680, -73.96695
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Wallack - 625 Park Ave 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. Its site EUI of 91.5 kBtu/ft² is about 22% above the average of 74.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 7.4 kgCO₂e/ft² is about 43% above the group average of 5.2 kgCO₂e/ft².
At 113,919 sq ft, it is about 13% above the average floor area of 100,951 sq ft for those buildings. It was built in 1929, 23 years earlier 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 Wallack - 625 Park Ave's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Wallack - 625 Park Ave, covering report years 2022–2024. Site EUI moved from 101.8 kBtu/ft² (2022) to 91.5 kBtu/ft² (2024), a 10% decrease. Reported emissions went from 752 tCO₂e to 845 tCO₂e over the same span (up 12%).
What does a site EUI of 91.5 kBtu/ft² mean?
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. Wallack - 625 Park Ave's 91.5 kBtu/ft² across 113,919 sq ft works out to about 10.4 billion Btu (3,055 MWh-equivalent) in 2024. Its source EUI of 168.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,374,907 kWh of electricity and 57,374 therms of natural gas for the year.
Which law requires Wallack - 625 Park Ave to report its energy use?
Wallack - 625 Park Ave 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:2656885:2024). 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
- 2239 Troy Avenue· 113,900 sq ft · score 73 (B)
- 870 Southern Blvd· 113,896 sq ft · score 63 (C)
- Serviam Heights Segment III· 113,893 sq ft
- 2501 Nostrand Ave· 113,851 sq ft · score 80 (B)
- 2525 Nostrand Ave, 11210· 113,850 sq ft · score 84 (B)
- Kingsley Towers LLC· 113,820 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 Wallack - 625 Park Ave's energy grade?
Wallack - 625 Park Ave did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 91.5 kBtu/ft².
How much energy does Wallack - 625 Park Ave use?
Its 2024 site energy-use intensity was 91.5 kBtu/ft² (168.2 kBtu/ft² source) across 113,919 sq ft, including 1,374,907 kWh of electricity and 57,374 therms of natural gas.
What are Wallack - 625 Park Ave's carbon emissions?
Wallack - 625 Park Ave reported 845 tCO₂e of greenhouse-gas emissions (7.4 kgCO₂e/ft²) for 2024.
Where is Wallack - 625 Park Ave?
Wallack - 625 Park Ave is at 623 PARK AVENUE, in New York City, New York 10065. Its coordinates are 40.76680, -73.96695 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Wallack - 625 Park Ave and when was it built?
Wallack - 625 Park Ave has 113,919 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1929 as its year built. It is classed as multifamily housing.
Is Wallack - 625 Park Ave 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, “Wallack - 625 Park Ave, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/wallack-625-park-ave-ef3a8fe8 (data as of October 2, 2026).