Jennie Realty - 3439 Knox Place
Multifamily Housing in New York City, NY · 3439 Knox Place · 10467
At a glance
Jennie Realty - 3439 Knox Place is a 44,281-square-foot multifamily housing building in New York City, New York, built in 1949. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 81 out of 100 (grade B), a site energy-use intensity of 73.8 kBtu/ft² and 206 tCO₂e of greenhouse-gas emissions. That score is higher than 64% 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 | 81 (band B) |
| Site EUI | 73.8 kBtu/ft² |
| Source EUI | 98.1 kBtu/ft² |
| GHG emissions | 206 tCO₂e |
| GHG intensity | 4.7 kgCO₂e/ft² |
| Electricity | 152,719 kWh |
| Natural gas | 27,489 therms |
| Water use | 924 kgal |
| Gross floor area | 44,281 sq ft |
| Source record | nyc:11884978:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 81 | +9 | 73.8 kBtu/ft² | 206 tCO₂e |
| 2023 | 72 | -2 | 77.6 kBtu/ft² | 214 tCO₂e |
| 2022 | 74 | 80.1 kBtu/ft² | 208 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
- 3439 Knox Place
- City
- New York City
- State
- New York
- ZIP
- 10467
- Coordinates
- 40.88205, -73.88337
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Jennie Realty - 3439 Knox Place 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. Jennie Realty - 3439 Knox Place's ENERGY STAR score of 81 compares with an average of 63 across the 22,829 that report a score; it scores higher than 64% of them and lower than 34%. Its site EUI of 73.8 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 4.7 kgCO₂e/ft² is about 11% below the group average of 5.2 kgCO₂e/ft².
At 44,281 sq ft, it is about 56% below the average floor area of 100,951 sq ft for those buildings. It was built in 1949, 3 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 Jennie Realty - 3439 Knox Place's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Jennie Realty - 3439 Knox Place, covering report years 2022–2024. Its ENERGY STAR score went from 74 in 2022 to 81 in 2024 (+7 points). Site EUI moved from 80.1 kBtu/ft² (2022) to 73.8 kBtu/ft² (2024), a 8% decrease. Reported emissions went from 208 tCO₂e to 206 tCO₂e over the same span (down 1%).
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 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. Jennie Realty - 3439 Knox Place's 73.8 kBtu/ft² across 44,281 sq ft works out to about 3.3 billion Btu (958 MWh-equivalent) in 2024. Its source EUI of 98.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 152,719 kWh of electricity, 27,489 therms of natural gas and 924 thousand gallons of water for the year.
Which law requires Jennie Realty - 3439 Knox Place to report its energy use?
Jennie Realty - 3439 Knox Place 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:11884978:2024). 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.
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- 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
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Frequently asked questions
What is Jennie Realty - 3439 Knox Place's energy grade?
Jennie Realty - 3439 Knox Place scores 81 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Jennie Realty - 3439 Knox Place use?
Its 2024 site energy-use intensity was 73.8 kBtu/ft² (98.1 kBtu/ft² source) across 44,281 sq ft, including 152,719 kWh of electricity and 27,489 therms of natural gas.
What are Jennie Realty - 3439 Knox Place's carbon emissions?
Jennie Realty - 3439 Knox Place reported 206 tCO₂e of greenhouse-gas emissions (4.7 kgCO₂e/ft²) for 2024.
Where is Jennie Realty - 3439 Knox Place?
Jennie Realty - 3439 Knox Place is in New York City, New York 10467. Its coordinates are 40.88205, -73.88337 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Jennie Realty - 3439 Knox Place and when was it built?
Jennie Realty - 3439 Knox Place has 44,281 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1949 as its year built. It is classed as multifamily housing.
Is Jennie Realty - 3439 Knox Place 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, “Jennie Realty - 3439 Knox Place, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/jennie-realty-3439-knox-place-2884090b (data as of October 2, 2026).