Depending on where your property is located, you may have a time limit to build attached to its ownership. This is due to local ordinances at either the county, city, or subdivision/HOA level.
The reason is mainly tied to the zoning and development plans for the area. Some parts of town will require you to build a certain style of home, a certain size home, and within a certain amount of time to ensure these development plans come to fruition.
The clock could start once you purchase the property, or only after you’ve submitted your building plans and actually break ground. Check with your local planning and zoning office to ensure you’re in the clear.