Department of Planning and development program director Maggie Cassidy shows a map of vacant or abandoned properties owned by the city of Chicago (in blue) and by the Cook County Land Bank Authority (in red) during a City Council committee meeting on Tuesday.

A City Council committee unanimously endorsed a proposal on Tuesday designed to make it easier for the city to breathe new life into abandoned properties — but only after aldermen pushed for assurances that they’ll be a part of the process.