Mayflower Agency Co., Inc.
Office in New York City, NY · 99 Madison Avenue · 10016
At a glance
Mayflower Agency Co., Inc. is a 126,052-square-foot office building at 99 Madison Avenue in New York City, New York, built in 1916. In its 2022 New York City benchmarking disclosure it reported an ENERGY STAR score of 91 out of 100 (grade A), a site energy-use intensity of 40.7 kBtu/ft² and 389 tCO₂e of greenhouse-gas emissions. That score is higher than 77% of the 2,519 scored office buildings in New York City.
Local Law 84 (LL84) · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 91 (band A) |
| Site EUI | 40.7 kBtu/ft² |
| Source EUI | 94.2 kBtu/ft² |
| GHG emissions | 389 tCO₂e |
| GHG intensity | 3.1 kgCO₂e/ft² |
| Electricity | 1,086,403 kWh |
| Water use | 2,076 kgal |
| Gross floor area | 126,052 sq ft |
| Source record | nyc:2667339:2022 |
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
- 99 Madison Avenue
- City
- New York City
- State
- New York
- ZIP
- 10016
- Coordinates
- 40.74476, -73.98513
Within ~1 km
Nearby benchmarked buildings
- ESRT - Empire State Buildingscore 78
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- PENN 1 (LL97)score —
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- PENN 1 (Offices)score —
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- 11 Madison Avenuescore 77
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- (71003A) Herald Square Macy'sscore 70
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- One Vanderbilt Avenuescore 43
Office · 1,828,353 sq ft
See also: most efficient in New York City · biggest emitters
How does Mayflower Agency Co., Inc. 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. Mayflower Agency Co., Inc.'s ENERGY STAR score of 91 compares with an average of 72 across the 2,519 that report a score; it scores higher than 77% of them and lower than 21%. Its site EUI of 40.7 kBtu/ft² is about 37% 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 3.1 kgCO₂e/ft² is about half of the group average of 5.8 kgCO₂e/ft².
At 126,052 sq ft, it is about 39% below the average floor area of 205,440 sq ft for those buildings. It was built in 1916, 24 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.
What does an ENERGY STAR score of 91 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 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 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. Mayflower Agency Co., Inc.'s 40.7 kBtu/ft² across 126,052 sq ft works out to about 5.1 billion Btu (1,504 MWh-equivalent) in 2022. Its source EUI of 94.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,086,403 kWh of electricity and 2,076 thousand gallons of water for the year.
Which law requires Mayflower Agency Co., Inc. to report its energy use?
Mayflower Agency Co., Inc. 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 2022 disclosure (source record nyc:2667339:2022). 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
- 495 FLATBUSH AVE. L.L.C.· 126,042 sq ft · EUI 53.2 kBtu/ft²
- 3651 Bruckner Blvd· 126,000 sq ft · score 100 (A)
- National Energy Cost Services Inc:511 5 AVENUE· 125,632 sq ft · score 88 (A)
- 511 Fifth Avenue LLC· 125,632 sq ft · score 97 (A)
- 511 Fifth Avenue· 125,632 sq ft · EUI 27.1 kBtu/ft²
- 117 GRATTAN STREET· 125,400 sq ft · score 100 (A)
- 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 Mayflower Agency Co., Inc.'s energy grade?
Mayflower Agency Co., Inc. scores 91 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2022 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Mayflower Agency Co., Inc. use?
Its 2022 site energy-use intensity was 40.7 kBtu/ft² (94.2 kBtu/ft² source) across 126,052 sq ft, including 1,086,403 kWh of electricity.
What are Mayflower Agency Co., Inc.'s carbon emissions?
Mayflower Agency Co., Inc. reported 389 tCO₂e of greenhouse-gas emissions (3.1 kgCO₂e/ft²) for 2022.
Where is Mayflower Agency Co., Inc.?
Mayflower Agency Co., Inc. is at 99 Madison Avenue, in New York City, New York 10016. Its coordinates are 40.74476, -73.98513 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Mayflower Agency Co., Inc. and when was it built?
Mayflower Agency Co., Inc. has 126,052 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1916 as its year built. It is classed as office.
Is Mayflower Agency Co., Inc. covered by Local Law 84 (LL84)?
Yes — it appears in the 2022 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, “Mayflower Agency Co., Inc., New York City, New York — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/mayflower-agency-co-inc-cf1dbe56 (data as of October 2, 2026).