Nice find! Although the project info describes this is "Phase 1B", not "Phase 2."
https://selfservice.portlandmaine.g...bbf0-d2af-485c-ba12-098118658eae?tab=moreinfo
The architects are listed as Market Square Architects of Portsmouth. Under the "More Info" tab, it describes a lot size of 26062 SF with an existing 31-space parking lot, which is consistent with the lot at Lancaster/Elm/Preble.
Also from the "More Info" tab: 217 apartments being planned, in a 171,720 SF building. If that building covered up the entire lot with 26,000 SF floor plates it would be a 7-story building. More likely, the floor plates will be considerably smaller, and the building will be taller.