PORTLAND — Penny St. Louis, director of the city’s Planning and Urban Development Department, will leave at the end of the month.

A press release from the city said St. Louis is leaving to pursue “new professional opportunities,” although no details were offered. St. Louis has been with Portland for nearly 14 years, starting as associate city lawyer and then heading up the Planning and Urban Development Department.

Three years ago, St. Louis led a reorganization of the department to make it more accessible to the public. She has also led an overhaul of Portland’s site plan standards, waterfront zoning and changes to how the city processes applications and awards funds from the federal Community Development Block Grant program.

St. Louis’ last day will be Oct. 28. City Manager Mark Rees said he will announce an acting director for the department and a national search process to replace St. Louis in coming weeks.