A subdivision survey may be required when an existing property needs to be divided. This can be for any number of reasons. They include, but are not limited to, estate settlement, mortgage requirements, development purposes, or to sell a portion of your property. To prepare a subdivision survey correctly, a boundary survey should be performed first to verify the dimensions and acreage of the original property. A subdivision survey can also be referred to as subdivision platting. Subdivision platting is the process of splitting a tract of land into smaller parcels. The survey is completed when an owner desires to.