Time depends on the number of various factors such as dirtiness of house, number of bedrooms and bathrooms in the property, any additional cleaning items required for the cleaning. 1 bedroom property takes around 4 to 6 hours, 2 bedrooms property takes 5 to 7 hours, 3 bedrooms property takes around 8 hours and 4 bedrooms take more than 8 hours. We always recommend to having 2 cleaners at the same time to finish the job quicker with attention to detailed.