In Denver, developers are building high-rises, duplexes, and so-called “McMansions,†often next to smaller, older homes. Meanwhile, preservationists want to maintain neighborhood character. City officials, looking for the root cause, point to Denver's outdated zoning code. Overhauling the code is a key element of Mayor John Hickenlooper’s Blueprint Denver, a comprehensive plan for land use and transportation. Ryan Warner talks to Denver's planning director, Peter Park.