Developers pressed for more infrastructure checks as Planning Board advances 21‑story Mount Vernon East proposal

A development team seeking to build a 21‑story, market‑rate residential tower at 140 East Prospect Avenue continued its public review before the Mount Vernon Planning Board on Wednesday, and board members asked the applicant for more engineering detail on sewers, stormwater and construction staging before the board forwards a draft resolution to the City Council.

The proposal, submitted by Alexander Development Group with Perkins Eastman as architect and Langan as civil/landscape engineer, would add a large mixed‑use building in the Mount Vernon East TOD‑1 zoning district. The team presented revised rooftop amenity plans, a lighting strategy that uses only building‑mounted fixtures, and a perimeter camera plan; board members and neighbors pressed for more evidence about sewer capacity, stormwater handling and how staging on narrow Portugal Place would affect pedestrian access to the train station.

Board members said the project is large enough that public infrastructure checks must be rigorous.…