Free, expert guidance to future-fit New York

NYC Accelerator, launched in 2012 by the NYC Mayor's Office of Sustainability, works with thousands of buildings across the five boroughs to build a cleaner future by lowering pollution and carbon emissions.


Please note: Some services provided by the NYC Accelerator are currently suspended due to COVID-19. This includes our free, personalized advisory services and technical assistance.
Sign up to be notified when the program relaunches later in 2020

NYC Accelerator is here to help you boost comfort in your building, control costs, and help fight climate change through energy efficiency and carbon reduction. We will support you as you plan to meet New York City's new greenhouse gas intensity targets based on Local Law 97 (LL97) and the Climate Mobilization Act.

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    Financial & Technical Assistance

    Plan, finance, and complete building energy efficiency and renewable energy projects

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    Connect with Contractors

    Find experienced and qualified contractors in your area

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    Understanding Local Laws

    Assist building owners and operators to meet LL97 targets and other NYC laws

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    Access Incentives

    Find incentive awards from local utilities and New York State to help you save costs

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    Join an online training to improve your skills or learn something new

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    Build High Performance

    Prepare for the future by building your next project to a High Performance standard

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LL97 Carbon Emissions Calculator

The LL97 Carbon Emissions Calculator estimates a building's carbon budget as prescribed in NYC Local Law 97.

Input annual utility information and building characteristics to generate emissions thresholds and resulting estimated penalties for three major penalty periods (2024-2029, 2030-2034, and 2035 and later).

nyc LL97
carbon emissions


  • Building Energy Efficiency Rating Local Law 33

    Learn more about LL33, and to access resources for owners and tenants.

  • Woman at a whiteboard pointing towards a diagramed outline of the Customer's Journey, part of a training program Trainings

    Explore hundreds of free, online training sessions offered by one of our educational partners

  • Green and grey logo for BE-Ex Events

    Sign up for an upcoming training provided by the Building Energy Exchange (BE-Ex)

  • Sunlight view of the City from Central Park NYC Carbon Challenge

    See how industry leaders have committed to reduce their emissions

  • Cover for the One City Built to Last Report that features the NYC skyline Publication & Reports

    Find information, analysis, and guides on making New York City more sustainable

  • Facade of a building with a green roof and green fire escapes Sustainability Compliance

    Learn about rules and guidance from the NYC Department of Buildings