Castelli also authored a bill to eliminate the Mount Kisco Urban Renewal Agency, a moribund public authority, which was called an "unnecessary mandate" for the village, that successfully passed both houses of the legislature in 2012. He also authored and passed legislation to rename portions of New York State Route 120 in Chappaqua and Purchase for Staff Sergeant Kyu Hyuk Chay, and Specialist Anthony Kalladeen, soldiers from those communities who were killed in action during the wars in Afghanistan, and Iraq, respectively.