Downstairs Toilet Utility Room Under Stairs. You can use the room under the stairs to make a small bathroom. We have a large selection to choose from and each one is perfect for a downstairs toilet. However this assumes the second bathroom does not come at the expense of another room in the house.
However converting unused space under the stairs into a bathroom will almost definitely increase the resale value. Visit close coupled toilets.
Converting an existing small room into a bathroom will likely not increase the value much if at all.
However installing a downstairs toilet in a large space such as a spare room or extension may take up to two weeks which will amp up the prices for the tradesmen. The downstairs bathroom idea might be good for you. However converting unused space under the stairs into a bathroom will almost definitely increase the resale value. Converting an existing small room into a bathroom will likely not increase the value much if at all.