How many floors can a self-built house by Suzhou Lake be built?

Fifth floor. According to the document "Technical Guidelines for Rural Housing Construction (Trial)", the number of self-built houses in rural areas shall not exceed 5, that is, 18.5 meters, so the self-built houses by Suzhou Lake can be built with 5 floors. Suzhou, referred to as "Su" for short, was called Gusu and Pingjiang in ancient times. It is a prefecture-level city under the jurisdiction of Jiangsu Province and one of the important central cities in the Yangtze River Delta determined by the State Council.