The check-in and check-out times at Grand Residences by Marriott can vary depending on the specific location and season. Generally, check-in is typically around 4:00 PM, allowing time for the staff to prepare accommodations for new guests. Check-out is usually set for 10:00 AM, which allows for cleaning and maintenance to prepare the residence for the next guests. It is always a good idea for travelers to check the specific property website for detailed information regarding their reservations, as policies can sometimes differ. Guests can often inquire about early check-in or late check-out options, subject to availability. For the most accurate and up-to-date information, visitors can refer to the current web page.