Brookfield’s $12.4 million downtown streetscape project has hit a roadblock after a developer canceled plans for a 50-unit apartment complex at 854 Federal Road. The cancellation follows delays linked to wetlands application approvals and a temporary moratorium on multiunit housing. Town officials are now reevaluating the project’s fourth phase, which aimed to extend the Still River Greenway. Options include finding a new developer or converting the land into open recreational space.