The highly contentious provincial agreements dating back to the 1970s have posed problems for city planners as they superseded the city’s residential zoning bylaws. As such, the land-use contracts (LUC) allowed property owners to build three-storey homes in neighbourhoods initially designed with two-storey homes.
http://www.richmond-news.com/city-hall/ding-dong-land-use-contracts-three-storey-homes-are-dead-1.2121310