Your last prep-work step is going to be laying out drop cloths and setting up your brush roller and paint tray. Ceiling and walls in standard 12 x 12 room can be painted in 5 6 hours by self assuming walls are in a good condition and will require two coats of flat paint application. Frog Tape Many Many Hours One Very Retro Feature Wall Bedroom Wall Designs Yellow Living Room Grey And Yellow Living Room Average Labor Cost To Paint A Room The average labor cost to paint a room is 180 to 650 which typically makes up 70 to 85 of your total cost. How many hours to paint one room . I would say that maybe allow about 3 days per room extra for the staircase and less for bathroom. When I get asked by someone who is not a painter how long it should take to paint a room I always say take your time and do it properly do not rush keep your working area free of any materials you are not using and clear up any mess as you go along. Generally to paint a standard room that measures 12 x 12 feet it ...