Final answer:
A raised platform at the entrance of a house, often with steps and a roof, is known as a porch.
Step-by-step explanation:
A raised platform, approached by steps and sometimes having a roof, at the entrance of a house, is commonly known as a porch. This is an architectural feature that provides a covered transition area from the outdoors to the indoors and serves various purposes, including as a space for relaxation or socializing. From a historical perspective, porches have been seen in many architectural styles, including those of the early Dutch settlers mentioned in the provided reference, where the porch is an integral part of the farmhouse, and in the Roman temples exemplified by the Peristyle's portico.