Rouen ducks are one of the larger domestic duck breeds, and their housing needs to reflect that. Each adult Rouen requires a minimum of four to six square feet of interior shelter space, though more is always better, particularly if the birds will be confined during poor weather or overnight lockdown periods. Overcrowding leads to stress, dirty conditions, and feather-picking behavior, so erring on the generous side when sizing a duck house pays dividends in flock health.
Outdoor run space is equally important and often overlooked. A minimum of ten to fifteen square feet per bird in the enclosed run gives Rouens enough room to move, forage, and engage in their characteristic waddling and dabbling without competing for space. Because Rouens are poor fliers due to their weight, fencing does not need to be especially tall, but it must be secure against ground-level predators.
Unlike chickens, ducks do not roost on elevated perches, so vertical space in the shelter is less critical than floor area. A duck house with a ceiling height of two to three feet is adequate for Rouens, though a taller structure is easier for the keeper to enter for cleaning. The floor plan should be open and free of internal obstacles that could trap or injure a duck moving in low light.
If your flock has access to a pond or swimming area, factor that into your overall space planning. Rouens are enthusiastic swimmers and a water feature, even a simple stock tank or kiddie pool, adds significant enrichment value. However, the area around any water feature will become muddy quickly, so drainage and footing in the surrounding zone need careful consideration during setup.