This 3-unit townhouse has the space and cash-flow potential for savvy buyers looking for an investment opportunity. The building is 25 feet wide and contains 3,370 square feet of interior space. Listing broker Citi Habitats notes that each unit is at least 1,000 square feet, with high ceilings and very open floor plans for appealing apartment layouts. A clean basement and large garden add to the package, plus another 375 square feet of buildable space is permitted on the property.

Talk about Park Slope perfection. This third-floor walk-up resides in an elegant 1900’s townhouse within steps of Grand Army Plaza and Prospect Park. The apartment features south-facing bay windows in the living room, a decorative fireplace and a formal dining room. A renovated kitchen is loaded with high-end appliances, including a Miele dishwasher. Listing agent Lois Planco at Compass notes the co-op’s shared roof deck and basement laundry. Monthlies are $825, but note that there are two assessments coming in the next six months.

Here’s a stellar opportunity in the Mark Twain, a premium midcentury co-op where Greenwich Village meets the West Village and Chelsea. The renovation of this 1-bedroom has delivered an efficiently modern interior with a focus on storage, starting with a super-smart walk-in closet and work desk. A windowed kitchen features custom millwork, and the bathroom has also been renovated. This popular building is pet-friendly and has laundry. Jay Glazer at Corcoran is the listing agent.

Call this a textbook example of the spacious, gracious apartments that are the hallmark of Upper West Side prewar buildings. This huge 2-bedroom co-op has high beamed ceilings, a renovated eat-in kitchen, built-in bookcases, crown molding, a washer and dryer and more. It’s just two blocks from Central Park and the 86th Street subway stop. Steven Parrino at Brown Harris Stevens is the listing agent.

Here’s a truly special opportunity in Turtle Bay Towers, a former print factory built in 1929 with stellar architectural and design roots. This unit is listed as a 1-bedroom but lives more like a large studio, with a perfect marriage of industrial-loft style with modernized finishes like bamboo kitchen cabinets and an ocean of tiles in the renovated bathroom. The pet-friendly listing from Howard Spiegelman at Compass also offers a roof deck, doorman, elevator and bike storage.