MCL - Knapp Street Property
Office in New York City, NY · 2450 Knapp St. · 11235
At a glance
MCL - Knapp Street Property is a 44,000-square-foot office building at 2450 Knapp St. in New York City, New York, built in 1961. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 80 out of 100 (grade B), a site energy-use intensity of 44.5 kBtu/ft² and 181 tCO₂e of greenhouse-gas emissions. That score is higher than 52% of the 2,519 scored office buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 80 (band B) |
| Site EUI | 44.5 kBtu/ft² |
| Source EUI | 102.0 kBtu/ft² |
| GHG emissions | 181 tCO₂e |
| GHG intensity | 4.1 kgCO₂e/ft² |
| Electricity | 407,164 kWh |
| Natural gas | 5,699 therms |
| Water use | 214 kgal |
| Gross floor area | 44,000 sq ft |
| Source record | nyc:15659169:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 80 | -8 | 44.5 kBtu/ft² | 181 tCO₂e |
| 2022 | 88 | 30.4 kBtu/ft² | 113 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
- 2450 Knapp St.
- City
- New York City
- State
- New York
- ZIP
- 11235
- Coordinates
- 40.59356, -73.93282
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does MCL - Knapp Street Property compare with other office buildings in New York City?
The latest disclosures cover 3,384 office buildings in New York City, out of 48,310 buildings citywide. MCL - Knapp Street Property's ENERGY STAR score of 80 compares with an average of 72 across the 2,519 that report a score; it scores higher than 52% of them and lower than 46%. Its site EUI of 44.5 kBtu/ft² is about 31% below the average of 64.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.1 kgCO₂e/ft² is about 29% below the group average of 5.8 kgCO₂e/ft².
At 44,000 sq ft, it is about 79% below the average floor area of 205,440 sq ft for those buildings. It was built in 1961, 21 years later than the group's average year built (1940). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has MCL - Knapp Street Property's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for MCL - Knapp Street Property, covering report years 2022–2023. Its ENERGY STAR score went from 88 in 2022 to 80 in 2023 (-8 points); its best year on file was 2022, at 88. Site EUI moved from 30.4 kBtu/ft² (2022) to 44.5 kBtu/ft² (2023), an 46% increase. Reported emissions went from 113 tCO₂e to 181 tCO₂e over the same span (up 60%).
What does an ENERGY STAR score of 80 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 80 means the building performs better than about 80% of its national peers. BuildingCensus bands the score into report-card grades; 80 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. MCL - Knapp Street Property's 44.5 kBtu/ft² across 44,000 sq ft works out to about 2 billion Btu (574 MWh-equivalent) in 2023. Its source EUI of 102.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 407,164 kWh of electricity, 5,699 therms of natural gas and 214 thousand gallons of water for the year.
Which law requires MCL - Knapp Street Property to report its energy use?
MCL - Knapp Street Property 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:15659169:2023). 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 office buildings in New York City
- 290 Madison Ave· 43,953 sq ft · score 46 (D)
- First Pioneer-102 West 38th Street· 43,920 sq ft · score 75 (B)
- Leviton Building· 43,890 sq ft · score 1 (D)
- 80 South Street· 43,818 sq ft · EUI 0.1 kBtu/ft²
- 318 E 48th St· 43,800 sq ft · score 33 (D)
- Mactaggart: 555 W 25th St,· 43,791 sq ft · score 80 (B)
- Office buildings in New York City· 3,384 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 MCL - Knapp Street Property's energy grade?
MCL - Knapp Street Property scores 80 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does MCL - Knapp Street Property use?
Its 2023 site energy-use intensity was 44.5 kBtu/ft² (102.0 kBtu/ft² source) across 44,000 sq ft, including 407,164 kWh of electricity and 5,699 therms of natural gas.
What are MCL - Knapp Street Property's carbon emissions?
MCL - Knapp Street Property reported 181 tCO₂e of greenhouse-gas emissions (4.1 kgCO₂e/ft²) for 2023.
Where is MCL - Knapp Street Property?
MCL - Knapp Street Property is at 2450 Knapp St., in New York City, New York 11235. Its coordinates are 40.59356, -73.93282 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is MCL - Knapp Street Property and when was it built?
MCL - Knapp Street Property has 44,000 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1961 as its year built. It is classed as office.
Is MCL - Knapp Street Property 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, “MCL - Knapp Street Property, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/mcl-knapp-street-property-90c9eb57 (data as of October 2, 2026).