There is parking in the Westin Hotel directly across 17th Street from United Plaza Building. There is parking at the Holiday Inn Crowne Plaza, which is at 18th and Market Streets (garage access on Market Street).
There are several parking garages on Sansom Street (small street between Walnut and Chestnut) from 15th through 18th Streets.
Downtown Philadelphia’s street parking is timed and payable at kiosks on each block. Kiosks accept coins, bills, SmartCards, credit cards and debit. Pricing and duration vary by area and time-of-day and are marked on signage on each block, so make sure to read the signs carefully prior to leaving your car.