Ashby Koval Restorations: Restorations and Fine Construction. Ashby-Koval Restorations was established in the late 1980’s primarily restoring older homes and building additions to many distinctive homes in Westchester County and surrounding areas. The scope of work can vary from a simple built-in cabinet to a three thousand square foot addition to numerous projects of many descriptions in-between. The company was founded and is still led by Ian Ashby, an apprenticed joiner and keen sailor from