It may well be viewed but will the property itself be viewed? Floor plans help landlords to justify why they are charging the price that they are. Including, via illustration, the size and dimension of your rooms as well as the overall square footage of the property can help prospective tenants to understand the price you have set. It would be a shame to miss out on the right tenant because they were put off by the absence of a floor plan illustrating completely why your property is worth the asking price.