About 2-5 hours. Depends on the complexity of the work to be done and the number of rooms. Regular maintaining cleaning of a one-room apartment will take 2 hours, of a two-room apartment—2-3 hours, of a three-room apartment—3 hours, of a 4-room apartment—more than 4 hours. More demanding types of cleaning (general, post-renovation) require more time. For example, general cleaning of a large apartment of three or more rooms takes 5-6 hours. Cleaning tricky dirt and marks, traces of construction mixes, dry cleaning of stains left on furniture can add +30 minutes. Cleaning after holidays and events is assessed on an individual basis. Cleaning of a large house, office, business center or industrial non-residential premises depends on the area and additional cleaning services required.