YJL: 21 Maiden Ln.
Multifamily Housing in New York City, NY · 21 Maiden Lane · 10038
At a glance
YJL: 21 Maiden Ln. is a 40,446-square-foot multifamily housing building at 21 Maiden Lane in New York City, New York, built in 1900. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 29 out of 100 (grade D), a site energy-use intensity of 81.9 kBtu/ft² and 260 tCO₂e of greenhouse-gas emissions. That score is higher than 17% 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 | 29 (band D) |
| Site EUI | 81.9 kBtu/ft² |
| Source EUI | 145.0 kBtu/ft² |
| GHG emissions | 260 tCO₂e |
| GHG intensity | 6.4 kgCO₂e/ft² |
| Electricity | 399,720 kWh |
| Natural gas | 19,471 therms |
| Gross floor area | 40,446 sq ft |
| Source record | nyc:7069145:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 29 | +18 | 81.9 kBtu/ft² | 260 tCO₂e |
| 2023 | 11 | -17 | 105.5 kBtu/ft² | 302 tCO₂e |
| 2022 | 28 | 84.5 kBtu/ft² | 228 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
- 21 Maiden Lane
- City
- New York City
- State
- New York
- ZIP
- 10038
- Coordinates
- 40.70926, -74.00908
Within ~1 km
Nearby benchmarked buildings
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- One Liberty Plaza (149 BROADWAY)score 75
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- 3 World Financial Centerscore 82
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See also: most efficient in New York City · biggest emitters
How does YJL: 21 Maiden Ln. 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. YJL: 21 Maiden Ln.'s ENERGY STAR score of 29 compares with an average of 63 across the 22,829 that report a score; it scores higher than 17% of them and lower than 83%. Its site EUI of 81.9 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft². Its emissions intensity of 6.4 kgCO₂e/ft² is about 24% above the group average of 5.2 kgCO₂e/ft².
At 40,446 sq ft, it is about 60% below the average floor area of 100,951 sq ft for those buildings. It was built in 1900, 52 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 YJL: 21 Maiden Ln.'s energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for YJL: 21 Maiden Ln., covering report years 2022–2024. Its ENERGY STAR score went from 28 in 2022 to 29 in 2024 (+1 points). Site EUI moved from 84.5 kBtu/ft² (2022) to 81.9 kBtu/ft² (2024), a 3% decrease. Reported emissions went from 228 tCO₂e to 260 tCO₂e over the same span (up 14%).
What does an ENERGY STAR score of 29 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 29 means the building performs better than about 29% of its national peers. BuildingCensus bands the score into report-card grades; 29 falls in band D — lowest band (1–54). It sits 46 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. YJL: 21 Maiden Ln.'s 81.9 kBtu/ft² across 40,446 sq ft works out to about 3.3 billion Btu (971 MWh-equivalent) in 2024. Its source EUI of 145.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 399,720 kWh of electricity and 19,471 therms of natural gas for the year.
Which law requires YJL: 21 Maiden Ln. to report its energy use?
YJL: 21 Maiden Ln. 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:7069145:2024). 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
- The Progressive T/A· 40,444 sq ft · score 2 (D)
- 500 Gates Ave· 40,440 sq ft · score 94 (A)
- Creston Heights 2333 Grand Ave· 40,428 sq ft · score 33 (D)
- 2333 Grand Avenue· 40,428 sq ft · score 35 (D)
- America Realty LLC : 35 WEST 64 STREET· 40,423 sq ft · score 100 (A)
- Most Reliable: 48 St. Pauls Pl· 40,420 sq ft · score 91 (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 YJL: 21 Maiden Ln.'s energy grade?
YJL: 21 Maiden Ln. scores 29 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 YJL: 21 Maiden Ln. use?
Its 2024 site energy-use intensity was 81.9 kBtu/ft² (145.0 kBtu/ft² source) across 40,446 sq ft, including 399,720 kWh of electricity and 19,471 therms of natural gas.
What are YJL: 21 Maiden Ln.'s carbon emissions?
YJL: 21 Maiden Ln. reported 260 tCO₂e of greenhouse-gas emissions (6.4 kgCO₂e/ft²) for 2024.
Where is YJL: 21 Maiden Ln.?
YJL: 21 Maiden Ln. is at 21 Maiden Lane, in New York City, New York 10038. Its coordinates are 40.70926, -74.00908 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is YJL: 21 Maiden Ln. and when was it built?
YJL: 21 Maiden Ln. has 40,446 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1900 as its year built. It is classed as multifamily housing.
Is YJL: 21 Maiden Ln. 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, “YJL: 21 Maiden Ln., New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/yjl-21-maiden-ln-8151d012 (data as of October 2, 2026).