Block Hall - 21 South William Street
Multifamily Housing in New York City, NY · 21 South William Street · 10004
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 1 (band D) |
| Site EUI | 145.9 kBtu/ft² |
| Source EUI | 269.8 kBtu/ft² |
| GHG emissions | 303 tCO₂e |
| GHG intensity | 11.9 kgCO₂e/ft² |
| Electricity | 497,634 kWh |
| Natural gas | 20,195 therms |
| Water use | 1,840 kgal |
| Gross floor area | 25,483 sq ft |
| Source record | nyc:9137338:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 1 | ±0 | 145.9 kBtu/ft² | 303 tCO₂e |
| 2023 | 1 | ±0 | 172.8 kBtu/ft² | 333 tCO₂e |
| 2022 | 1 | 157.0 kBtu/ft² | 263 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 owner listed in the disclosure.
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Location
- Address
- 21 South William Street
- City
- New York City
- State
- New York
- ZIP
- 10004
- Coordinates
- 40.70451, -74.01074
Within ~1 km
Nearby benchmarked buildings
- 55 Waterscore 78
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- 225 Liberty Streetscore 81
Office · 2,577,575 sq ft
Office · 2,542,563 sq ft
- One Liberty Plaza (149 BROADWAY)score 75
Office · 2,346,193 sq ft
- 28 Libertyscore 59
Financial Office · 2,200,000 sq ft
- 120 Broadway Holdings, LLCscore 78
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See also: most efficient in New York City · biggest emitters
Frequently asked questions
What is Block Hall - 21 South William Street's energy grade?
Block Hall - 21 South William Street 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 Block Hall - 21 South William Street use?
Its 2024 site energy-use intensity was 145.9 kBtu/ft² (269.8 kBtu/ft² source) across 25,483 sq ft, including 497,634 kWh of electricity and 20,195 therms of natural gas.
What are Block Hall - 21 South William Street's carbon emissions?
Block Hall - 21 South William Street reported 303 tCO₂e of greenhouse-gas emissions (11.9 kgCO₂e/ft²) for 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.
Dataset updated . Source: Energy and Water Data Disclosure disclosure, record nyc:9137338:2024.