Class A office space has suddenly become a limited commodity throughout the city’s urban core. A project on the frontier of East Village gentrification, the IDEA District, promises to solve a lot of this. But it needs tenants before it can get off the ground.

One charter school CEO says the district’s property-selling spree could violate measures intended to give charter schools first dibs on unused school space.

The mayor has expressed interest in keeping one of the school district’s most valuable plots of land under public ownership.