Form RP-485-y: Vacant Residential Real Property Improvement Exemption (Certain Cities)

Form RP-485-y is issued by the New York State Department of Taxation and Finance for owners who improve vacant residential real property located in certain qualifying cities. The exemption is designed to encourage rehabilitation of vacant homes by temporarily reducing the increase in assessed value that would otherwise result from construction, renovation, or conversion work.

Unlike a general homeowner exemption, this form applies specifically to properties that were vacant before improvements began. Cities that adopt this local option allow property owners to apply for a partial exemption on the added value created by the improvement, rather than paying full taxes on the increased assessment right away. This gives owners a financial incentive to fix up vacant residential buildings instead of leaving them empty or letting them deteriorate further.

Who Needs to File This Form

You need Form RP-485-y if you own a residential property that was vacant and you completed (or are completing) improvements such as renovation, reconstruction, or conversion into residential use, in a city that has opted into this exemption program under the applicable Real Property Tax Law section. Not every city in New York offers this exemption, so the first step is confirming with your local assessor’s office whether your municipality has adopted the local law authorizing it.

This form is commonly used by investors, developers, and individual homeowners rehabilitating older or previously vacant residential buildings in urban areas where cities are trying to reduce the number of empty properties on their tax rolls.

When to Use Form RP-485-y

The application should be filed with your local assessor after the qualifying improvement work is completed, or according to the timeline set by your city’s local law adopting the exemption. Because filing deadlines and documentation requirements can vary from one municipality to another, it’s worth checking with the assessor’s office early in your renovation project rather than waiting until the work is finished.

You’ll typically need to provide details about the property, a description of the improvement work performed, and supporting documentation showing the property was vacant prior to the project. The assessor uses this information to calculate the exempt portion of the assessed value increase and determine how long the exemption will apply, since these programs are usually phased out gradually over several years rather than granted permanently.

How to Get and Complete the Form

Form RP-485-y, revised 11/24, is available as a fillable PDF directly from the New York State Department of Taxation and Finance. Because it includes AcroForm fields, you can type your information directly into the document on a computer before printing it for signature and submission — no need to fill it out by hand. After completing the form, submit it to the local assessor’s office for the city where the property is located, along with any documentation requested to support your application, such as proof of vacancy status or building permits.

If you’re not sure this is the right exemption for your situation, it helps to compare it with similar programs. For example, Form RP-485-T covers partial tax exemptions for residential construction work in certain cities more broadly, without the vacancy requirement. If your project involves converting a commercial building into residential use, Form RP-485-N may apply instead. And if your situation involves a property revaluation rather than new construction, Form RP-485-v2 addresses that scenario specifically.

Because eligibility rules, exemption percentages, and phase-out schedules differ by city, it’s always a good idea to speak directly with your local assessor before submitting Form RP-485-y, so you know exactly what documentation is required and how the exemption will be applied to your tax bill going forward.