Systems and methods for customizing a building floor plan are provided. In one embodiment, a method for customizing a building floor plan comprises: at an electronic device with a display: receiving a request to modify one or more building components of a base plan associated with a building; in response to receiving the request to modify the one or more building components, determining whether the request to modify the one or more building components satisfy one or more compliance requirements; in accordance with a determination that the request to modify the one or more building components satisfy one or more compliance requirements: displaying, on the display, an updated base plan incorporating the request to modify the one or more building components; and in accordance with a determination that the request to modify the one or more building components is non-compliant, not updating of the base plan in accordance with the requested modification.