Infill Redevelopment ; Requires local government to permit development of certain qualifying parcels up to certain density & intensity; requires developers of qualifying parcels to maintain specified buffer between new developments & single-family homes & townhouses; requires developers of qualifying parcels to establish that certain recreational facilities & areas reserved for recreational use have not been in operation or use for certain timeframe, to pay double parks & recreational facilities impact fees, & to provide written notice to certain property owners; requires property owners who receive such written notice to exercise option to purchase certain parcels or portions thereof within specified timeframe or forfeit option; requires development on qualifying parcels to meet concurrency requirements.