there is no record of the structure, but the sanborn map indicates there is a long history of it. the decks and stairs are in bad disrepair at this point. deck boards and stair treads are rotting, as well as some of the beams and posts. just real quick, there's the 1914 map showing a stair, and then, this is perthe condition of now, it's sort of large and looming, rotting. because the decks are improperly flashed, over the years both units have sustained water damage, both exterior and interior during the heavy rains. we obviously could have done a 50% repair and fore gone this process, but we wanted to do this right. we wanted to fix once and for all, the problems with how the decks are attached to the building. we also wanted decks that are lighter and smaller and provide for more light and air to the inhabit of our building. as you know it's not easy designing something in san francisco that can please tenants in two units, neighbors on all sides, the planning department and the preservation department, but we think the solution that you're seeing today is good for several reas