A multistorey car park (British and Singapore English) or parking garage (American English), also called a multistory, parking building, parking structure, parkade (mainly Canadian), parking ramp, parking deck or indoor parking, is a building designed for car, motorcycle and bicycle parking and where there are a number of floors or levels on which parking takes place. It is essentially an indoor, stacked car park. The first known multistory facility was built in London in 1901, and the first underground parking was built in Barcelona in 1904. (See History, below.) The term multistory is almost never used in the US, since parking structures are almost all multiple levels. Parking structures may be heated if they are enclosed.

Design of parking structures can add considerable cost for planning new developments, with costs in the United States around $28,000 per space and $56,000 per space for underground (excluding the cost of land), and can be mandated by cities in new building parking requirements. Some cities such as London have abolished previously enacted minimum parking requirements. Minimum parking requirements are a hallmark of zoning and planning codes for municipalities (States do not prescribe parking requirements, while counties and cities can) in the US. [Parking Structures by Mary S. Smith, et al. ISBN 0-7923-7213-1][1]