CB - 101 Ludlow Street
Residence Hall/Dormitory in New York City, NY · 101 Ludlow Street · 10002
At a glance
CB - 101 Ludlow Street is a 114,397-square-foot residence hall/dormitory in New York City, New York, built in 2007. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 49 out of 100 (grade D), a site energy-use intensity of 64.2 kBtu/ft² and 729 tCO₂e of greenhouse-gas emissions. That score is higher than 16% of the 177 scored residence hall/dormitory buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 49 (band D) |
| Site EUI | 64.2 kBtu/ft² |
| Source EUI | 160.7 kBtu/ft² |
| GHG emissions | 729 tCO₂e |
| GHG intensity | 6.4 kgCO₂e/ft² |
| Electricity | 1,787,226 kWh |
| Natural gas | 12,468 therms |
| Water use | 4,454 kgal |
| Gross floor area | 114,397 sq ft |
| Source record | nyc:20999063:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 49 | +19 | 64.2 kBtu/ft² | 729 tCO₂e |
| 2022 | 30 | 110.6 kBtu/ft² | 881 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
- 101 Ludlow Street
- City
- New York City
- State
- New York
- ZIP
- 10002
- Coordinates
- 40.71911, -73.98886
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does CB - 101 Ludlow Street compare with other residence hall/dormitory buildings in New York City?
The latest disclosures cover 343 residence hall/dormitory buildings in New York City, out of 48,310 buildings citywide. CB - 101 Ludlow Street's ENERGY STAR score of 49 compares with an average of 69 across the 177 that report a score; it scores higher than 16% of them and lower than 82%. Its site EUI of 64.2 kBtu/ft² is about 19% below the average of 79.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 6.4 kgCO₂e/ft² is about 16% above the group average of 5.5 kgCO₂e/ft².
At 114,397 sq ft, it is about 34% above the average floor area of 85,583 sq ft for those buildings. It was built in 2007, 61 years later than the group's average year built (1947). Across all 24 jurisdictions BuildingCensus covers, the 702 residence hall/dormitory buildings average an ENERGY STAR score of 70 and a site EUI of 70.7 kBtu/ft².
How has CB - 101 Ludlow Street's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for CB - 101 Ludlow Street, covering report years 2022–2023. Its ENERGY STAR score went from 30 in 2022 to 49 in 2023 (+19 points). Site EUI moved from 110.6 kBtu/ft² (2022) to 64.2 kBtu/ft² (2023), a 42% decrease. Reported emissions went from 881 tCO₂e to 729 tCO₂e over the same span (down 17%).
What does an ENERGY STAR score of 49 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 49 means the building performs better than about 49% of its national peers. BuildingCensus bands the score into report-card grades; 49 falls in band D — lowest band (1–54). It sits 26 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. CB - 101 Ludlow Street's 64.2 kBtu/ft² across 114,397 sq ft works out to about 7.3 billion Btu (2,152 MWh-equivalent) in 2023. Its source EUI of 160.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,787,226 kWh of electricity, 12,468 therms of natural gas and 4,454 thousand gallons of water for the year.
Which law requires CB - 101 Ludlow Street to report its energy use?
CB - 101 Ludlow Street 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 2023 disclosure (source record nyc:20999063:2023). 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 residence hall/dormitory buildings in New York City
- 129 3rd Avenue· 113,000 sq ft · EUI 66.4 kBtu/ft²
- Henley Road· 111,900 sq ft · score 82 (B)
- St. Mary's Home for Working Girls· 111,570 sq ft · score 89 (A)
- 55 John Street· 110,132 sq ft · score 50 (D)
- 55 John St.· 110,132 sq ft · EUI 104.7 kBtu/ft²
- International House - 524 Riverside Dr.· 110,111 sq ft · score 71 (B)
- Residence Hall/Dormitory buildings in New York City· 343 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 CB - 101 Ludlow Street's energy grade?
CB - 101 Ludlow Street scores 49 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does CB - 101 Ludlow Street use?
Its 2023 site energy-use intensity was 64.2 kBtu/ft² (160.7 kBtu/ft² source) across 114,397 sq ft, including 1,787,226 kWh of electricity and 12,468 therms of natural gas.
What are CB - 101 Ludlow Street's carbon emissions?
CB - 101 Ludlow Street reported 729 tCO₂e of greenhouse-gas emissions (6.4 kgCO₂e/ft²) for 2023.
Where is CB - 101 Ludlow Street?
CB - 101 Ludlow Street is in New York City, New York 10002. Its coordinates are 40.71911, -73.98886 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is CB - 101 Ludlow Street and when was it built?
CB - 101 Ludlow Street has 114,397 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2007 as its year built. It is classed as residence hall/dormitory.
Is CB - 101 Ludlow Street covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 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, “CB - 101 Ludlow Street, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/cb-101-ludlow-street-7c634d3f (data as of October 2, 2026).