Grokash Realty
Office in New York City, NY · 236 West 30th Street · 10001
At a glance
Grokash Realty is a 64,414-square-foot office building at 236 West 30th Street in New York City, New York, built in 1926. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 98 out of 100 (grade A), a site energy-use intensity of 46.0 kBtu/ft² and 195 tCO₂e of greenhouse-gas emissions. That score is higher than 92% 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 | 98 (band A) |
| Site EUI | 46.0 kBtu/ft² |
| Source EUI | 66.4 kBtu/ft² |
| GHG emissions | 195 tCO₂e |
| GHG intensity | 3.0 kgCO₂e/ft² |
| Electricity | 195,497 kWh |
| Natural gas | 22,958 therms |
| Water use | 216 kgal |
| Gross floor area | 64,414 sq ft |
| Source record | nyc:2694097:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 98 | +2 | 46.0 kBtu/ft² | 195 tCO₂e |
| 2022 | 96 | 57.5 kBtu/ft² | 219 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
- 236 West 30th Street
- City
- New York City
- State
- New York
- ZIP
- 10001
- Coordinates
- 40.74895, -73.99362
Within ~1 km
Nearby benchmarked buildings
- Hudson Yards Cogen Campusscore —
Other · 7,739,076 sq ft
- Manhattan Westscore —
Other · 4,153,954 sq ft
- 20-30 Hudson Yardsscore —
Office · 3,810,623 sq ft
- Penn Southscore 95
Multifamily Housing · 3,391,963 sq ft
- 50 Hudson Yardsscore 76
Office · 2,944,455 sq ft
- The Spiral - 66 Hudson Boulevardscore 82
Office · 2,830,000 sq ft
See also: most efficient in New York City · biggest emitters
How does Grokash Realty 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. Grokash Realty's ENERGY STAR score of 98 compares with an average of 72 across the 2,519 that report a score; it scores higher than 92% of them and lower than 6%. Its site EUI of 46.0 kBtu/ft² is about 29% 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 3.0 kgCO₂e/ft² is about half of the group average of 5.8 kgCO₂e/ft².
At 64,414 sq ft, it is about 69% below the average floor area of 205,440 sq ft for those buildings. It was built in 1926, 14 years earlier 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 Grokash Realty's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for Grokash Realty, covering report years 2022–2023. Its ENERGY STAR score went from 96 in 2022 to 98 in 2023 (+2 points). Site EUI moved from 57.5 kBtu/ft² (2022) to 46.0 kBtu/ft² (2023), a 20% decrease. Reported emissions went from 219 tCO₂e to 195 tCO₂e over the same span (down 11%).
What does an ENERGY STAR score of 98 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 98 means the building performs better than about 98% of its national peers. BuildingCensus bands the score into report-card grades; 98 falls in band A — high performer (85–100). 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. Grokash Realty's 46.0 kBtu/ft² across 64,414 sq ft works out to about 3 billion Btu (868 MWh-equivalent) in 2023. Its source EUI of 66.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 195,497 kWh of electricity, 22,958 therms of natural gas and 216 thousand gallons of water for the year.
Which law requires Grokash Realty to report its energy use?
Grokash Realty 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:2694097:2023). 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
- 116 East 16th Street· 64,405 sq ft · score 26 (D)
- 89-31 161 Street· 64,390 sq ft · score 82 (B)
- 49-47 31st Street· 64,358 sq ft · score 99 (A)
- Douglaston: 82-11 37th Ave· 64,337 sq ft · score 69 (C)
- 37 West 65th Street· 64,294 sq ft · EUI 101.6 kBtu/ft²
- 237 West 37th Street· 64,280 sq ft · score 58 (C)
- 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 Grokash Realty's energy grade?
Grokash Realty scores 98 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Grokash Realty use?
Its 2023 site energy-use intensity was 46.0 kBtu/ft² (66.4 kBtu/ft² source) across 64,414 sq ft, including 195,497 kWh of electricity and 22,958 therms of natural gas.
What are Grokash Realty's carbon emissions?
Grokash Realty reported 195 tCO₂e of greenhouse-gas emissions (3.0 kgCO₂e/ft²) for 2023.
Where is Grokash Realty?
Grokash Realty is at 236 West 30th Street, in New York City, New York 10001. Its coordinates are 40.74895, -73.99362 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Grokash Realty and when was it built?
Grokash Realty has 64,414 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1926 as its year built. It is classed as office.
Is Grokash Realty 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, “Grokash Realty, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/grokash-realty-fed1629e (data as of October 2, 2026).