Fairness For Breastfeeding Mothers Act of 2017 (Sec. 2) This bill requires certain public buildings that have a public restroom to provide a lactation room, other than a bathroom, that is available for use by members of the public to express milk. The lactation room must be a hygienic place that is shielded from public view and free from intrusion and must contain a chair, a working surface, and an electrical outlet. A public building may be excluded from such requirement at the discretion of the official responsible for its operation if: it does not contain a lactation room for employees and does not have a space that could be repurposed as one or that could be made private by using portable materials, at a reasonable cost; or the cost of new construction required to create a lactation room is not feasible.