How long does it take for construction dust to settle?

The time it takes for construction dust to settle can vary depending on a number of factors such as the size of the construction site, the type of building materials used, and the ventilation in the building.
In general, it can take anywhere from a few hours to a few days for construction dust to settle. If a building is closed up with poor ventilation, it may take longer for the dust to settle. On the other hand, if a building has good ventilation, it may take less time for the dust to settle.
It's also important to note that dust can continue to circulate in the air even after it has settled on surfaces, so it's important to take steps to remove it, such as using a HEPA-filtered vacuum cleaner and air purifier.
It is recommended to wait at least 24-48 hours before entering the construction area, to give the dust some time to settle. Also, to ensure the safety of the people who will be working or living in the building, it's important to conduct a thorough cleaning and air quality testing after construction is completed.