The standard height of a first-floor building can vary depending on the location, building codes, and the purpose of the building. In many countries, including the United States, the typical height of a first floor is around 10 feet (approximately 3 meters) for residential buildings and can go up to 14 feet (around 4.3 meters) for commercial buildings.
However, it's essential to note that building standards and regulations can differ from one place to another. Some regions may have different requirements for ceiling heights, especially for specific types of buildings like warehouses, industrial structures, or historical buildings. Always consult with local building authorities and adhere to the relevant building codes when constructing or renovating a building.