Estimate how long it takes to clean a home by size and rooms.
Cleaning time is not proportional to floor area alone, because the rooms that take longest are the smallest. Professional cleaners work to roughly 0.045 minutes per square foot for general floors and surfaces, then add fixed allowances per room: about twenty-two minutes for a bathroom and twenty-five for a kitchen, against twelve for a bedroom. That is why a compact three-bathroom house takes longer than a large open-plan one of the same area. Depth of clean is the biggest multiplier — a deep clean that includes skirtings, inside appliances, window frames and limescale runs close to twice a standard visit, and a move-out clean more than that. Extra people help but not linearly; two people finish a house in rather more than half the time because they cannot both work the same bathroom.
Cleaning time from area, rooms and depth
Base minutes = area x 0.045 + bathrooms x 22 + bedrooms x 12 + 25; total = base x depth factor; elapsed = total / people / parallel efficiency, where efficiency = 1 - 0.08 x (people - 1)
Because they are almost entirely detail work — sanitising, descaling, glass, grout and fittings — none of which scales with floor area. Two bathrooms add roughly three quarters of an hour to a standard clean regardless of how small they are.
Close to double. Deep cleaning adds skirting boards, door frames, inside the oven and fridge, limescale removal, light fittings and window interiors, each of which is slow and none of which appears in a routine visit.
Not quite. Expect around fifty-five to sixty percent of the single-person time, because they cannot work the same bathroom or corridor simultaneously and some time goes on dividing up the work.