City Realty of Allston has proposed replacing a rental-car parking lot with a five-story, 52-unit apartment building at 13 Norwood St., along the Red Line/commuter-rail tracks and off Morrissey Boulevard.

In a filing with the BPDA, City Realty also proposes 50 parking spaces.

The units would be split between studios and 1- and 2-bedroom units, with seven apartments rented as affordable.

The company hopes to begin roughly 18 months of construction on the $18.9-million project in the third quarter of 2023.

13 Norwood St. filings and meeting schedule.