Final answer:
The elevation certificate is the most relevant record for ensuring that a house is elevated properly in relation to expected flood levels, providing detailed elevation information necessary for compliance and insurance purposes.
Step-by-step explanation:
The best record to keep to ensure that a house was elevated high enough is an elevation certificate. This document provides detailed information on the elevation of a home’s lowest floor in relation to the expected flood levels for the area, which is crucial for compliance with floodplain management ordinances and determining proper insurance premium rates. A building permit is essential for the construction process; however, it does not provide detailed elevation information. A flood insurance policy is related to financial coverage, not specific elevation data, and a property deed contains legal descriptions of property ownership, again not pertaining to the elevation details.