Hello,
I have a variation of this question - in our instance, we have our (main bathroom, to include a bath) ... coupled with an en suite (where there is a shower) and a downstairs toilet, with sink (housed under the stairs).
I seriously doubt this means I have three bathrooms and yet, acknowledge that it would add some value to our property, above those who have neither of the additions we have - nonetheless, they might have other rooms or storage space which I don't have and there's no consideration for altering value as a result of those benifits.
Nothing in this life, is easy .....
Regards
Mr. Earl.