Artist/photographer David LaChapelle is listing his Chelsea apartment inside a townhouse at 427 W. 21st St., where he has owned for four years, for $2.46 million. The one-bedroom, one-bathroom, parlor-level pad boasts details like hand-carved plaster moldings, wood trim, 12-foot ceilings, custom cabinetry and three marble fireplaces. The home is smart wired and well planned for entertaining with a chef’s kitchen and private terrace surrounded by “century old trees,” says a prior listing. The listing brokers are Heather McDonough and Henry Hershkowitz, of CORE.