BPL, one of three systems in New York City and the country’s fifth-largest library (by population served), has suffered consistent underfunding of capital needs, with its 59 locations facing a $230 million backlog of deferred maintenance, barely dented by the $15 million annual allotment of capital funding.

Their solution: sell two aging libraries that occupy valuable land, and work with real estate developers to include libraries in residential towers. It’s not uncommon for urban libraries to consider mixed-use buildings, though few face the real estate froth characteristic in Brooklyn.