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Sunsetting 179D after OBBB: Updates, Safe Harbor, and Timeline to Consider

The passing of the One Big Beautiful Bill Act brings important updates for those leveraging the 179D energy-efficient commercial building deduction. Join Mark Bacon, PE, P.Eng, Energy Efficiency Practice Lead, as he explains implications for designers, builders, and other industry professionals. You’ll gain insight into IRS safe harbor requirements and learn strategies to stay ahead […]

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    Sep 12, 2025

    12:00 AM GMT
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The passing of the One Big Beautiful Bill Act brings important updates for those leveraging the 179D energy-efficient commercial building deduction. Join Mark Bacon, PE, P.Eng, Energy Efficiency Practice Lead, as he explains implications for designers, builders, and other industry professionals. You’ll gain insight into IRS safe harbor requirements and learn strategies to stay ahead of evolving rules while continuing to optimize tax savings.

Agenda

  • Understanding OBBB impacts
  • 179d opportunities and challenges in the new landscape  
  • IRS safe harbor rules: what to document and how to comply 

Whats 179D

The §179D Energy Efficient Commercial Building Property Deduction provides commercial building owners, and designers of buildings owned by public entities and designers of tax-exempt entities the opportunity to claim a tax deduction for installing qualifying energy-efficient buildings.

About Leyton:

Leyton is an international consulting firm that helps businesses leverage financial incentives to accelerate their growth and achieve sustainable performance. ​We simplify access to these complex incentives. Our combined teams of highly skilled Tax and Technical specialists maximize the financial benefits for businesses.​ With compliance always front of mind, we have been delivering optimal services for our client for over 25 years. This provides peace of mind that you will always receive the maximum benefit, without taking risks.

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    Speakers

    Mark Bacon
    Mark Bacon

    Leyton Practice Lead - Commercial Real Estate Incentives

    LinkedIn - Mark BaconLinkedIn