Addition and alteration to an existing, vacant, and partially demolished single-family rowhouse. addition, alteration, and renovation to all existing levels. new framing, roof, walls, doors, windows, stairs, floors, conc. slab, ceilings, kitchen, bathrooms, appliances, hvac, plumbing & electric fixtures and equipment. re-build ex. front porch & new rear deck. site improvements including: alteration and repairs to existing front lead walk & steps, new rear areaway & privacy perimeter fence. no underpinning under this permit. new sprinkler system nfpa 13d will be provided. area affected by the work is 3,136 sf