1. Add new shower bath at 3rd floor laundry. No structural or exterior changes or work. 2. Replace existing worn treads, risers, balusters, and handrail on stair flight. All dimensions of compnents will be unchanged. No structural changes or work. 3. Install replacement sashset for rotted sashset in wnd floor bath. No frame or size change. 4. Remove stair at rear uncovered deck. Don not replace stair, infill gap in guard rail at former stair to match existing - about 3. No changes to deck structure or setbacks.