The newly renovated townhouse at 190 President Street in Carroll Gardens is now leasing. It was purchased by an LLC two years ago for $2,125,000. Prices range from $5,800 a month for a three-bedroom to $9,500 a month for a five-bedroom duplex with roof space. One of the four units, a three-bedroom for $6,000, is already gone. Inside, the apartments look like typical new condos.