In Central New York, Koslowsky Construction is the name to know for windows, doors, siding, framing and more. Your satisfaction is our top priority, and we remain focused on the key factors that will make that happen: Staying on schedule, finishing on budget, delivering quality results with no surprises. In fact, we guarantee it. Owned and operated by David Koslowsky, our growing business has handled a variety of new construction and remodeling jobs since 2001. Now our experienced, full-time staff is ready to take on your next project.