{"id":5910,"date":"2026-02-06T10:43:10","date_gmt":"2026-02-06T10:43:10","guid":{"rendered":"https:\/\/thecotocongroup.com\/blog\/?p=5910"},"modified":"2026-02-24T06:39:08","modified_gmt":"2026-02-24T06:39:08","slug":"why-nyc-buildings-lose-energy-grades","status":"publish","type":"post","link":"https:\/\/thecotocongroup.com\/blog\/why-nyc-buildings-lose-energy-grades\/","title":{"rendered":"Why Some NYC Buildings Lose Energy Grades Every Year"},"content":{"rendered":"

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Why Some NYC Buildings Lose Energy Grades Every Year<\/b><\/h3>\n

New York City has taken a strong stance on energy efficiency and carbon reduction. Through benchmarking laws and public disclosure requirements, building owners must report their annual energy performance. As a result, many properties receive an official energy grade that reflects how efficiently they use electricity, gas, and other fuels.<\/span><\/p>\n

However, a growing number of property owners are asking the same question: <\/span>Why do some NYC buildings lose energy grades every year?<\/b><\/p>\n

If your building\u2019s grade has dropped from a B to a C\u2014or even lower\u2014you are not alone. Across New York City, commercial buildings, multifamily properties, and mixed-use developments experience fluctuating energy performance scores due to several technical, operational, and compliance-related factors.<\/span><\/p>\n

This article explains why energy grades decline, what it means for building owners in the United States, and how to prevent long-term performance loss.<\/span><\/p>\n

Understanding NYC Energy Grades<\/b><\/h3>\n

Before exploring the reasons behind declining grades, it is important to understand how the system works. Under the city\u2019s benchmarking requirements, large buildings must report energy and water usage annually through <\/span>ENERGY STAR Portfolio Manager<\/span><\/a>. The building then receives an energy efficiency score and a public letter grade.<\/span><\/p>\n

The grading system is closely tied to federal standards developed by the U.S. Environmental Protection Agency and its ENERGY STAR program. Buildings are evaluated based on energy consumption intensity (EUI), building type, occupancy patterns, and operational characteristics.<\/span><\/p>\n

In addition, local regulations such as <\/span>Local Law 84<\/span><\/a> and <\/span>Local Law 97<\/span><\/a> increase scrutiny on performance. A decline in energy efficiency not only impacts your public grade but may also affect compliance status and potential carbon penalties.<\/span><\/p>\n

1. Increased Energy Usage Without System Upgrades<\/b><\/h4>\n

One of the most common reasons buildings lose energy grades is rising energy consumption without improvements in infrastructure.<\/span><\/p>\n

Over time, tenants add more plug loads, install additional IT equipment, increase cooling demands, or extend operating hours. If HVAC systems, lighting systems, and insulation remain outdated, energy use rises while performance declines.<\/span><\/p>\n

For example, many older New York buildings still rely on aging boilers, inefficient chillers, or outdated control systems. When these systems operate beyond their optimal lifespan, energy waste increases significantly.<\/span><\/p>\n

Without upgrades such as high-efficiency HVAC systems, LED retrofits, or smart building controls, the building\u2019s Energy Use Intensity (EUI) worsens. As a result, the ENERGY STAR score drops.<\/span><\/p>\n

2. Poor Data Reporting and Benchmarking Errors<\/b><\/h4>\n

Energy grades depend entirely on accurate benchmarking data. Even small reporting errors can impact your score.<\/span><\/p>\n

Common mistakes include:<\/span><\/p>\n