Attention developers and investors:  A handsome three-story six-family on a corner lot in vibrant East Cambridge, this brick building is essentially a pair of side-by-side three-families. The first-floor units are each one-bed, one-bath, with four two-bed, one-bath units upstairs. Rear porches provide open-air space for relaxation, while a full-height unfinished basement presents development potential. Each unit has a newer boiler and water tank and upgraded electrical systems, and the membrane roof was installed in 2005.  The windows were replaced in 1990, and two units were renovated in 2005. The building was tested for lead paint and four of the units and the common areas have been brought into compliance. A classic beauty in a dynamic part of the city. All tenants are tenants at will.