10 15 Realty LLC : 18-20 East 84th St.
Multifamily Housing in New York City, NY · 18-20 East 84th St. · 10028
At a glance
10 15 Realty LLC : 18-20 East 84th St. is a 23,948-square-foot multifamily housing building in New York City, New York, built in 1950.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | — |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 115,925 kWh |
| Natural gas | 307 therms |
| Gross floor area | 23,948 sq ft |
| Source record | nyc:21715305:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | — | — | — | |
| 2022 | 37 | 116.6 kBtu/ft² | 209 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 18-20 East 84th St.
- City
- New York City
- State
- New York
- ZIP
- 10028
- Coordinates
- 40.77984, -73.96050
Within ~1 km
Nearby benchmarked buildings
- Benchmarking Group - 226score —
Other - Recreation · 2,345,603 sq ft
Museum · 2,153,282 sq ft
Multifamily Housing · 1,047,938 sq ft
- NH Lenox Hill Hospital Campusscore 64
Hospital (General Medical & Surgical) · 850,896 sq ft
- 185 East 85th Streetscore 48
Multifamily Housing · 651,162 sq ft
- DEPM 1498 - 1185 Park Avescore —
Multifamily Housing · 634,685 sq ft
See also: most efficient in New York City · biggest emitters
How does 10 15 Realty LLC : 18-20 East 84th St. 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.
At 23,948 sq ft, it is about 76% below the average floor area of 100,951 sq ft for those buildings. Its 1950 construction date is close to 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 10 15 Realty LLC : 18-20 East 84th St.'s energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 10 15 Realty LLC : 18-20 East 84th St., covering report years 2022–2023. Only one of those years carries energy figures.
Which law requires 10 15 Realty LLC : 18-20 East 84th St. to report its energy use?
10 15 Realty LLC : 18-20 East 84th St. 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:21715305:2023). 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 multifamily housing buildings in New York City
- 580 Central Avenue AKA 155 Eldert Street· 23,940 sq ft · score 60 (C)
- 85 WEST 166 STREET· 23,913 sq ft
- 126 La Salle St· 23,886 sq ft · score 28 (D)
- CitiLeaf Housing· 23,849 sq ft · score 7 (D)
- Melrose Park HDFC-689 Melrose Avenue· 23,842 sq ft · score 4 (D)
- 648 Howard Ave· 23,800 sq ft · score 1 (D)
- Multifamily Housing buildings in New York City· 33,022 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 10 15 Realty LLC : 18-20 East 84th St.'s energy grade?
10 15 Realty LLC : 18-20 East 84th St. did not report an ENERGY STAR score in its 2023 disclosure.
How much energy does 10 15 Realty LLC : 18-20 East 84th St. use?
No energy-use intensity was reported for 2023.
What are 10 15 Realty LLC : 18-20 East 84th St.'s carbon emissions?
No greenhouse-gas emissions figure was reported for 2023.
Where is 10 15 Realty LLC : 18-20 East 84th St.?
10 15 Realty LLC : 18-20 East 84th St. is in New York City, New York 10028. Its coordinates are 40.77984, -73.96050 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 10 15 Realty LLC : 18-20 East 84th St. and when was it built?
10 15 Realty LLC : 18-20 East 84th St. has 23,948 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1950 as its year built. It is classed as multifamily housing.
Is 10 15 Realty LLC : 18-20 East 84th St. 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, “10 15 Realty LLC : 18-20 East 84th St., New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/10-15-realty-llc-18-20-east-84th-st-484bd9ff (data as of October 2, 2026).