Special Assessment for Solar Energy Systems

Last updated: January 17, 2020

Program Overview

Implementing Sector:State
Category:Financial Incentive
State:Illinois
Incentive Type:Property Tax Incentive
Administrator:Illinois Department of Commerce and Economic Opportunity
Eligible Renewable/Other Technologies:Solar Water Heat, Solar Space Heat, Solar Photovoltaics
Incentive Amount:Varies
Maximum Incentive:None specified
Eligible System Size:None specified
Equipment Requirements:None specified

Authorities

Name:§ 35 ILCS 200/10-5 et seq.

Summary

Special Assessment for Solar Energy Systems

Illinois offers a special assessment of solar energy systems for property tax purposes. When a claim for alternate valuation is filed, the chief county assessment officer is required to ascertain two values: the value of the improvements as if equipped with a conventional heating or cooling system and the value of the improvements as equipped with the solar energy system. The alternate valuation is the lesser of these two values.

Eligible equipment includes both active and passive solar energy systems. The exemption is not valid for equipment that is equally usable in a conventional energy system or for components that serve non-solar energy generating (e.g., structural, aesthetic, insulating, etc.) purposes.

Application for Solar Assessment

Those who wish to have their solar energy property valued in this fashion must file the State of Illinois PTAX-330 property tax form with their local county assessor's office. Forms are available online and through each Illinois county assessor's office.

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