How many days does it take for Hong Kong Green Watch to receive the nomination letter for purchasing second-hand HOS flats?

In 4-6 weeks. According to the official website of the Hong Kong Housing Department, the purchase of second-hand HOS flats requires submitting a nomination application and obtaining a nomination letter from the Housing Department before submitting an offer to the owners. After the nomination application is submitted, the Housing Department will examine it and issue a nomination letter after approval. Usually, the review time for nomination applications is 4-6 weeks. If the application materials are complete and filled in correctly, it may be passed faster. Therefore, the time to receive the nomination letter will vary according to individual circumstances, which may be within 4-6 weeks, or longer or shorter.