Depends. Will you be building a foundation? You can estimate a cost per sq ft to build out the room but the bath could run you anywhere from $15K to $50K depending on the finishes. Is it a master bath or a lower level bath for the kids? Are you including the cost of permits in the estimate? I can definitely recommend some great contractors who will navigate the Westport Permitting process and get you a great deal. Also, Coldwell Banker has a Concierge service that has partnered with local contractors. Another great reference!
Don't hesitate to contact me!
KMS Partners Coldwell Banker Riverside Westport
Roughly runs about $175 per Sq.Ft! and all depend about where the addition is going to be such as craw space or full basement!Please feel free to contact me on my cellular 203-417-2882.Regards,Larry Ataide