81 Columbus Ave., Waltham
Open house: Nov. 10, noon — 1:30 p.m.
Listed Price: $429,900
Property type: Condominium
Square footage: 3,057
The skinny: 5 bedrooms, 2 bathrooms
This two-level penthouse located in the new Columbia Condominiums feateres a stunning open floor plan, a new gourmet kitchen with lots of granite and stainless steel appliances, and an oversized fireplaced living room.