A person can find a property's legal description by checking the deed to the property. The deed can be a physical copy or most areas have copies of the deed available for review online. Many of the real estate companies and online listing sites offer access or obtainable copies of this information also.
Legal descriptions generally involve a survey being done, or having been done at some point. Any time that a property is transferred or sold, it is required that the deed, contracts or mortgages involved in the transaction include the legal description of the property. This description is used to help decide the price and also affects the amount of taxes that has to be paid on a property every year as well.