This lot is regulated by the County of Marin and the Coastal Commission, so one would start with the County for building possibilities.
It has been in escrow twice; the first buyer was told by the County that they would not be able to build the house they wanted, so they cancelled. The second buyer was told by the County that it would be difficult to put in a septic, so they cancelled.
This lot will need itsâ€™ own well and septic, and that is going to be a challenge. The lot is shaped like a rectangle and 2/3â€™s of it is in the water.
My seller purchased it thinking someday they would look into building, but never did and have decided to sell.
My suggestion is to call the County of Marin (415-473-6269), give them the APN# 104-230-08 and they will give you what info they can.