When you're working with vacant land, development opportunities, or off-market properties, everything starts with the APN — Assessor’s Parcel Number. This category is dedicated to helping buyers, sellers, and real estate pros quickly locate, research, and understand properties using just the parcel number. Whether you're verifying ownership, checking zoning, or mapping out lot lines, the tools here make property research faster and more accurate. From interactive GIS maps to mobile apps that show parcel boundaries right where you’re standing, these resources let you visualize land in a whole new way. Whether you're a first-time land buyer or a seasoned investor, you’ll find what you need to evaluate property potential, spot red flags, and move with confidence — all starting with just a number.