Wavecrest - 850 Longwood Avenue
Multifamily Housing in New York City, NY · 850 Longwood Avenue · 10459
At a glance
Wavecrest - 850 Longwood Avenue is a 40,801-square-foot multifamily housing building in New York City, New York, built in 1925. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 75 out of 100 (grade B), a site energy-use intensity of 79.6 kBtu/ft² and 266 tCO₂e of greenhouse-gas emissions. That score is higher than 57% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 75 (band B) |
| Site EUI | 79.6 kBtu/ft² |
| Source EUI | 115.5 kBtu/ft² |
| GHG emissions | 266 tCO₂e |
| GHG intensity | 6.5 kgCO₂e/ft² |
| Electricity | 233,817 kWh |
| Natural gas | 1,032 therms |
| Water use | 196 kgal |
| Gross floor area | 40,801 sq ft |
| Source record | nyc:6691577:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 75 | +11 | 79.6 kBtu/ft² | 266 tCO₂e |
| 2022 | 64 | 96.4 kBtu/ft² | 297 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
- 850 Longwood Avenue
- City
- New York City
- State
- New York
- ZIP
- 10459
- Coordinates
- 40.81938, -73.90138
Within ~1 km
Nearby benchmarked buildings
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- MCKINLEYscore 99
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See also: most efficient in New York City · biggest emitters
How does Wavecrest - 850 Longwood Avenue compare with other multifamily housing buildings in New York City?
The latest disclosures cover 33,022 multifamily housing buildings in New York City, out of 48,310 buildings citywide. Wavecrest - 850 Longwood Avenue's ENERGY STAR score of 75 compares with an average of 63 across the 22,829 that report a score; it scores higher than 57% of them and lower than 42%. Its site EUI of 79.6 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft². Its emissions intensity of 6.5 kgCO₂e/ft² is about 25% above the group average of 5.2 kgCO₂e/ft².
At 40,801 sq ft, it is about 60% below the average floor area of 100,951 sq ft for those buildings. It was built in 1925, 27 years earlier than the group's average year built (1952). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Wavecrest - 850 Longwood Avenue's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for Wavecrest - 850 Longwood Avenue, covering report years 2022–2023. Its ENERGY STAR score went from 64 in 2022 to 75 in 2023 (+11 points). Site EUI moved from 96.4 kBtu/ft² (2022) to 79.6 kBtu/ft² (2023), a 17% decrease. Reported emissions went from 297 tCO₂e to 266 tCO₂e over the same span (down 10%).
What does an ENERGY STAR score of 75 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 75 means the building performs better than about 75% of its national peers. BuildingCensus bands the score into report-card grades; 75 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. Wavecrest - 850 Longwood Avenue's 79.6 kBtu/ft² across 40,801 sq ft works out to about 3.2 billion Btu (952 MWh-equivalent) in 2023. Its source EUI of 115.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 233,817 kWh of electricity, 1,032 therms of natural gas and 196 thousand gallons of water for the year.
Which law requires Wavecrest - 850 Longwood Avenue to report its energy use?
Wavecrest - 850 Longwood Avenue 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:6691577:2023). 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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Frequently asked questions
What is Wavecrest - 850 Longwood Avenue's energy grade?
Wavecrest - 850 Longwood Avenue scores 75 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 Wavecrest - 850 Longwood Avenue use?
Its 2023 site energy-use intensity was 79.6 kBtu/ft² (115.5 kBtu/ft² source) across 40,801 sq ft, including 233,817 kWh of electricity and 1,032 therms of natural gas.
What are Wavecrest - 850 Longwood Avenue's carbon emissions?
Wavecrest - 850 Longwood Avenue reported 266 tCO₂e of greenhouse-gas emissions (6.5 kgCO₂e/ft²) for 2023.
Where is Wavecrest - 850 Longwood Avenue?
Wavecrest - 850 Longwood Avenue is in New York City, New York 10459. Its coordinates are 40.81938, -73.90138 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Wavecrest - 850 Longwood Avenue and when was it built?
Wavecrest - 850 Longwood Avenue has 40,801 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1925 as its year built. It is classed as multifamily housing.
Is Wavecrest - 850 Longwood Avenue 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, “Wavecrest - 850 Longwood Avenue, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/wavecrest-850-longwood-avenue-87579670 (data as of October 2, 2026).