Start with everyday tasks
Consider bringing in washing, sorting it, loading and unloading, reaching detergent and getting to drying space. Ask which parts are difficult and which the person wants to manage independently.
Choose the appliance arrangement with the layout
Front loading and top loading machines have different operating requirements. Check the actual product dimensions, opening space, controls and installation instructions. Do not build cabinetry around an assumed standard machine.
Review reach and handling
An appliance position should suit the person and the task, including moving wet washing. Any raised installation needs appropriate support and product guidance. Get individual advice where functional limitations affect use.
Keep circulation clear during use
Draw the room with doors, drawers and appliances open. Include baskets and any equipment that will usually be present. The remaining route may be very different from the empty floor plan.
Treat a combined bathroom and laundry as one design
A machine should not obstruct access to the shower, toilet or basin. Consider water, drainage, electrical work, ventilation and storage together. The builder needs to assess the proposed arrangement and applicable requirements.
Check the route to drying areas
A useful laundry can still be difficult if the next step involves a threshold, heavy door or external stairs. Include that route in the assessment rather than treating it as a separate future problem.
Include the work in a clear project scope
Confirm what happens to services, cabinetry, flooring and finishes. Ask how the household will manage laundry during construction and which appliances are supplied by whom. This planning topic can be discussed as part of a wider renovation enquiry.