Energy Efficiency


Buildings generate 80% of New York City's greenhouse gas emissions.  Improving their energy efficiency is critical to protecting our environment. The Greener, Greater Buildings Plan is helping New York City educate building owners and dramatically cut our energy use.

Many new sustainable technologies have recently come to the marketplace that help offset these emissions, increase a building's efficiency, decrease energy dependence, and reduce costs for homeowners. Here you will find resources that review these technologies, describe the benefits they offer, and explain how they can be used within New York City.

There are several ways that you can increase the energy efficiency of you home and cut carbon emissions. Both small improvements, such as painting, and large projects, such as solar panel installation, can make a significant difference in lowering energy costs.

The Energy Code May Affect New Home Construction or Home Alterations

Since 1979, new construction and major alterations have been required to comply with the State Energy Code. In July of 2010, New York City initiated its own New York City Energy Conservation Code (NYCECC), applicable to all alterations. For homeowners, this means that when you add an addition to your home or renovate it, you will have to comply with the NYCECC and your home will be more energy-efficient.

Whether you are building a new home or adding onto or renovating your current home, your architect or engineer may advise you that certain additional requirements must be incorporated into your plans in order to be in compliance with the NYCECC. You can always verify the status of your application and what requirements need to be met before construction begins, by using the Buildings Information System search tool.

Complying with the NYCECC

The purpose of the NYCECC to:

  • Make sure buildings are properly sealed by providing a tight and insulated envelope (roof, walls, windows, foundation) to keep heating and cooling inside the building while still providing fresh outside air;
  • Illuminate buildings' interiors using efficient lighting and as much daylight as possible to accomplish this; and
  • Heat and cool buildings using as much recycled energy as possible to reduce buildings' power consumption, i.e. using furnaces and air conditioning units that are sized appropriately for the size of your home.

When creating plans for your home, in order to comply with the NYCECC your architect and/or engineer must meet certain values for the insulation, windows, heating system, ventilation system, air conditioning, hot water equipment, lighting and the power system.


To demonstrate compliance with the NYCECC, all New Building and Alteration Type-1, -2 and -3 applications require the following:

  • Professional Statement (mandatory for all);
  • Energy Analysis (mandatory unless the application is exempt); and
  • Supporting Documentation (mandatory unless the application is exempt or compliance is not required - see Energy Analysis).


Please visit our website regularly for updated information. For more information, visit our Energy Conservation Code page.


Helpful Links