MARY STAR OF THE SEA APTS
Multifamily Housing in New York City, NY · 344 Carroll Street · 11231
At a glance
MARY STAR OF THE SEA APTS is a 86,921-square-foot multifamily housing building at 344 Carroll Street in New York City, New York, built in 1985. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 83 out of 100 (grade B), a site energy-use intensity of 64.2 kBtu/ft² and 367 tCO₂e of greenhouse-gas emissions. That score is higher than 67% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 83 (band B) |
| Site EUI | 64.2 kBtu/ft² |
| Source EUI | 90.3 kBtu/ft² |
| GHG emissions | 367 tCO₂e |
| GHG intensity | 4.2 kgCO₂e/ft² |
| Electricity | 332,795 kWh |
| Natural gas | 44,458 therms |
| Water use | 4,612 kgal |
| Gross floor area | 86,921 sq ft |
| Source record | nyc:30105175:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 83 | -1 | 64.2 kBtu/ft² | 367 tCO₂e |
| 2023 | 84 | 62.7 kBtu/ft² | 351 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
- 344 Carroll Street
- City
- New York City
- State
- New York
- ZIP
- 11231
- Coordinates
- 40.67903, -73.99136
Within ~1 km
Nearby benchmarked buildings
- GOWANUSscore 27
Multifamily Housing · 1,065,928 sq ft
- Regal: 58 2nd Avescore —
Non-Refrigerated Warehouse · 395,900 sq ft
- Brodsky - 499 Presidentscore 100
Multifamily Housing · 328,556 sq ft
- Lightstone - 365 Bond Streetscore 65
Multifamily Housing · 327,600 sq ft
- Lightstone Group - 365 Bond Stscore 50
Multifamily Housing · 323,193 sq ft
Self-Storage Facility · 307,148 sq ft
See also: most efficient in New York City · biggest emitters
How does MARY STAR OF THE SEA APTS 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. MARY STAR OF THE SEA APTS's ENERGY STAR score of 83 compares with an average of 63 across the 22,829 that report a score; it scores higher than 67% of them and lower than 32%. Its site EUI of 64.2 kBtu/ft² is about 14% below the average of 74.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.2 kgCO₂e/ft² is about 19% below the group average of 5.2 kgCO₂e/ft².
At 86,921 sq ft, it is about 14% below the average floor area of 100,951 sq ft for those buildings. It was built in 1985, 33 years later 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 MARY STAR OF THE SEA APTS's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for MARY STAR OF THE SEA APTS, covering report years 2023–2024. Its ENERGY STAR score went from 84 in 2023 to 83 in 2024 (-1 points); its best year on file was 2023, at 84. Site EUI moved from 62.7 kBtu/ft² (2023) to 64.2 kBtu/ft² (2024), an 2% increase. Reported emissions went from 351 tCO₂e to 367 tCO₂e over the same span (up 5%).
What does an ENERGY STAR score of 83 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 83 means the building performs better than about 83% of its national peers. BuildingCensus bands the score into report-card grades; 83 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. MARY STAR OF THE SEA APTS's 64.2 kBtu/ft² across 86,921 sq ft works out to about 5.6 billion Btu (1,635 MWh-equivalent) in 2024. Its source EUI of 90.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 332,795 kWh of electricity, 44,458 therms of natural gas and 4,612 thousand gallons of water for the year.
Which law requires MARY STAR OF THE SEA APTS to report its energy use?
MARY STAR OF THE SEA APTS 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 2024 disclosure (source record nyc:30105175:2024). 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
- 70 Park Terrace West· 86,904 sq ft · score 84 (B)
- Direct Management - 167-10 Crocheron Avenue· 86,896 sq ft · score 55 (C)
- Piermont Management: 45 John St· 86,883 sq ft · score 32 (D)
- 67 Owners, LTD· 86,881 sq ft · score 90 (A)
- Halstead - 56 Pine Street· 86,839 sq ft · score 21 (D)
- Copy of Halstead - 56 Pine Street· 86,839 sq ft · score 44 (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 MARY STAR OF THE SEA APTS's energy grade?
MARY STAR OF THE SEA APTS scores 83 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does MARY STAR OF THE SEA APTS use?
Its 2024 site energy-use intensity was 64.2 kBtu/ft² (90.3 kBtu/ft² source) across 86,921 sq ft, including 332,795 kWh of electricity and 44,458 therms of natural gas.
What are MARY STAR OF THE SEA APTS's carbon emissions?
MARY STAR OF THE SEA APTS reported 367 tCO₂e of greenhouse-gas emissions (4.2 kgCO₂e/ft²) for 2024.
Where is MARY STAR OF THE SEA APTS?
MARY STAR OF THE SEA APTS is at 344 Carroll Street, in New York City, New York 11231. Its coordinates are 40.67903, -73.99136 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is MARY STAR OF THE SEA APTS and when was it built?
MARY STAR OF THE SEA APTS has 86,921 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1985 as its year built. It is classed as multifamily housing.
Is MARY STAR OF THE SEA APTS covered by Local Law 84 (LL84)?
Yes — it appears in the 2024 Energy and Water Data Disclosure disclosure, which lists the buildings reporting under Local Law 84 (LL84).
Working with New York City building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “MARY STAR OF THE SEA APTS, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/mary-star-of-the-sea-apts-84ac92c5 (data as of October 2, 2026).