Which type of survey is utilized to ascertain the location of existing structures concerning property lines?

The correct type of survey that ascertains the location of existing structures concerning property lines is a boundary survey. This type of survey is specifically designed to determine the precise legal boundaries of a property, which includes establishing the positions of structures in relation to those boundaries.

A boundary survey involves measuring distances and angles and plotting the property lines, which allows for clarity on how structures are situated with respect to property limits. This is crucial for property ownership issues, zoning compliance, and development planning.

The other types of surveys mentioned serve different purposes. A topographic survey focuses on the terrain and features of the land, showing elevation changes and landforms rather than the legal boundaries. A construction survey lays out proposed structures based on a design and does not typically assess existing buildings. An elevation survey measures the height of a property concerning a reference point, which is not relevant to determining the positioning of structures related to property lines.