Building Owners
For commercial building owners evaluating whether existing buildings, renovations, or projects under construction may qualify for 179D.
Go to Building Owner GuideBuilding Designers
For architects, engineers, contractors, and consultants involved in tax-exempt building projects that may allocate 179D deductions to qualified designers.
Go to Building Designer Guide
179D Estimate Calculator
Estimate a Potential 179D Deduction
Enter basic project information to estimate potential §179D deductions. The calculator is a preliminary screening tool based on typical energy savings values. Actual modeled results could vary significantly.
Project Inputs
Estimated Output
Potential §179D deduction per sq. ft.
$4.88
Potential §179D deduction
$976,000
Important: This calculator provides a preliminary guideline only. The modeled energy savings and resulting deduction will vary based on the building characteristics. This simplified calculator assumes buildings built between 2006-2022 have LED lighting and qualify only for the lighting deduction. It also assumes no other 179D deductions were taken in the prior three years and that the cost of the building or upgrades exceed the estimated tax deduction.
Experience That Matters
RPTI’s team has provided real property tax incentives for real estate owners for over 20 years, including Cost Segregation and 179D Energy Efficiency studies.
