A knowledgeable and experienced local real estate professional like me can help you get the right answers to your real estate questions. This question requires more research before it can be answered properly. There may be restrictive covenants that prevent a property owner from improving a property with a guesthouse. Another restriction may be placed on the property if it is located within one of the seven different voluntary zoning districts within the Florence area. There may also be restrictions within the platting of this parcel that do not allow a second home to be built in certain portions of the property. And yes, you would also need appropriate permits/approval from the County for further development of any parcel with habitable improvements.
I have been a certified residential appraiser in Ravalli County for more than 10 years.
If you want this question answered by a professional, please feel free to contact me at 406-363-7008. -Darwin Ernst, SRA
Real Estate Agent and Professional Certified Residential Appraiser in Ravalli County Montana