Underground parking structures are more common as land values rise and as communities encourage mixed-use developments that incorporate parking beneath the primary development use – office, retail, hotel, and residential. Underground parking also allows the city or developer to take full advantage of available street frontage for placement of retail and commercial uses. Though more costly, underground parking provides many long-term benefits such as preserving prime real estate for other more downtown-friendly uses, convenient, centrally located parking, and removing parking from street frontage.