Welcome to Hinsdale, IL

If you own a landmark home or a home in a historic district you may qualify for an 8 to 12 year property tax assessment freeze for rehabilitating the home while retaining its historic character.

be a registered historic structure, either by listing on the National Register of Historic Places, or designated by an approved local historic preservation ordinance.
be used as a single-family, owner-occupied residence or condominium, or as a cooperative, or as an owner-occupied residential building with up to six units.
have at least 25% of the property's market value spent on an approved renovation project.
be a substantial rehabilitation that significantly improves the condition of the historic building
be rehabilitated in accordance with the Secretary of the Interior's "Standards for Rehabilitation"

Contact IHPA or the Historic Preservation Commission to determine if your property is a registered historic structure. Individual properties within historic districts will be certified as historic structures by the IHPA if it makes a positive contribution to the historic significance of a district.
Determine the assessed valuation and market value (of fair cash value) of your property by contacting you assessment officer or by referring to your current property tax bill.

Provide the IHPA with the proposed rehabilitation plans and photographs showing the condition of the building prior to initiating work. The IHPA will determine if both the interior and exterior rehabilitation plans comply with the Secretary of Interior's "Standards for Rehabilitation"
Once your preliminary plans are approved, proceed with the rehabilitation project. Contact the IHPA if there are changes made to the rehabilitation plans during the course of the project.

When the project is completed, forward to the IHPA photographs showing the completed work and documentation proving that 25% of the property's market value was spent on rehabilitation (paid bills, canceled checks). With the exception of landscaping, appliances, and new construction (outside the historic building), any money spent on the physical rehabilitation of the property will qualify.
The Certificate of Rehabilitation is transmitted to the assessment officer and a copy forwarded to the property owner. The assessor makes the necessary adjustments.