Two office-to-residential redevelopment projects received approval from the Boston Planning & Development Agency. Together, they’ll bring 155 new residential units to the city.

The projects were applicants for Mayor Wu’s Office-to-Residential Conversion Program, which aims to transform underused or empty office space into housing.

The redevelopment at 123 N Washington Street will see a five-story office building in the North End converted to 45 apartments. Seven of the units will be designated for households making 60% of area median income.

Plans note that a ground-floor restaurant in the building will remain.

The BPDA board also approved a project at 16-18 Hawley Street, sometimes called the 31 Milk Street project. An 11-story office building downtown will be transformed into 110 new units of housing, including 22 affordable units.

Located within walking distance of Faneuil Hall, the project aims to help achieve the city’s goal of bringing more residents to the downtown area.