Treeline 188 Montague LLC
Office in New York City, NY · 188 Montague Street · 11201
At a glance
Treeline 188 Montague LLC is a 48,050-square-foot office building at 188 Montague Street in New York City, New York, built in 1924. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 56 out of 100 (grade C), a site energy-use intensity of 100.8 kBtu/ft² and 349 tCO₂e of greenhouse-gas emissions. That score is higher than 20% 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 | 56 (band C) |
| Site EUI | 100.8 kBtu/ft² |
| Source EUI | 165.8 kBtu/ft² |
| GHG emissions | 349 tCO₂e |
| GHG intensity | 7.3 kgCO₂e/ft² |
| Electricity | 482,188 kWh |
| Natural gas | 31,982 therms |
| Gross floor area | 48,050 sq ft |
| Source record | nyc:6271119:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 56 | -6 | 100.8 kBtu/ft² | 349 tCO₂e |
| 2022 | 62 | 87.8 kBtu/ft² | 278 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
- 188 Montague Street
- City
- New York City
- State
- New York
- ZIP
- 11201
- Coordinates
- 40.69401, -73.99150
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Treeline 188 Montague LLC 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. Treeline 188 Montague LLC's ENERGY STAR score of 56 compares with an average of 72 across the 2,519 that report a score; it scores higher than 20% of them and lower than 79%. Its site EUI of 100.8 kBtu/ft² is about 56% above the average of 64.5 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 7.3 kgCO₂e/ft² is about 26% above the group average of 5.8 kgCO₂e/ft².
At 48,050 sq ft, it is about 77% below the average floor area of 205,440 sq ft for those buildings. It was built in 1924, 16 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 Treeline 188 Montague LLC's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for Treeline 188 Montague LLC, covering report years 2022–2023. Its ENERGY STAR score went from 62 in 2022 to 56 in 2023 (-6 points); its best year on file was 2022, at 62. Site EUI moved from 87.8 kBtu/ft² (2022) to 100.8 kBtu/ft² (2023), an 15% increase. Reported emissions went from 278 tCO₂e to 349 tCO₂e over the same span (up 26%).
What does an ENERGY STAR score of 56 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 56 means the building performs better than about 56% of its national peers. BuildingCensus bands the score into report-card grades; 56 falls in band C — below median (55–69). It sits 19 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. Treeline 188 Montague LLC's 100.8 kBtu/ft² across 48,050 sq ft works out to about 4.8 billion Btu (1,419 MWh-equivalent) in 2023. Its source EUI of 165.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 482,188 kWh of electricity and 31,982 therms of natural gas for the year.
Which law requires Treeline 188 Montague LLC to report its energy use?
Treeline 188 Montague LLC 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:6271119:2023). 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.
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- 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
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Frequently asked questions
What is Treeline 188 Montague LLC's energy grade?
Treeline 188 Montague LLC scores 56 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Treeline 188 Montague LLC use?
Its 2023 site energy-use intensity was 100.8 kBtu/ft² (165.8 kBtu/ft² source) across 48,050 sq ft, including 482,188 kWh of electricity and 31,982 therms of natural gas.
What are Treeline 188 Montague LLC's carbon emissions?
Treeline 188 Montague LLC reported 349 tCO₂e of greenhouse-gas emissions (7.3 kgCO₂e/ft²) for 2023.
Where is Treeline 188 Montague LLC?
Treeline 188 Montague LLC is at 188 Montague Street, in New York City, New York 11201. Its coordinates are 40.69401, -73.99150 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Treeline 188 Montague LLC and when was it built?
Treeline 188 Montague LLC has 48,050 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1924 as its year built. It is classed as office.
Is Treeline 188 Montague LLC 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, “Treeline 188 Montague LLC, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/treeline-188-montague-llc-8b61d31c (data as of October 2, 2026).