The number of proposed apartments and the proposed apartment sizes won’t be known until the proposals are received and one is chosen. It is not possible to project the number of students until that time.
It is also illegal under the Fair Housing Act of 1968 as well as under the Massachusetts Fair Housing Law to discriminate against families with children.
That said, Joe Pato and Rod Cole of the School Enrollment Working Group wrote an open letter in Feb 2023 in regards to concerns over a hypothetical addition to Lexington of 1200-1500 households in connection with the MBTA Multi-Family and the SRD 2023 Town Meeting Zoning Articles The findings from the Five Year Enrollment Forecasts for Lexington Public School: FY2015-FY2020 Report of the Enrollment Group study show that new developments take time to fill out (from a student enrollment perspective) and that even when fully occupied have an occupancy ratio less than 1 per unit (since the majority of units don’t have students). Further, student ages tend to span multiple grades. For instance, if one looks just at the elementary schools, broadly there were approximately 10,000 households and 6 elementary schools so roughly 1600 households per elementary school. https://zoom.joepato.org/2023/02/open-letter-regarding-the-effects-of-housing-expansion-on-school-enrollment/