19 Unit Multi-Family For Sale. Excellent Income with strong rental history. Three great buildings with in very good condition with a total of 19 units. 17 Portland Ave is a Colonial gem that was built in 1790 with great architectural features. 25 Portland Ave is a Victorian style house built in 1890 and a great look. 33 Portland Ave is a Victorian style also and built in 1920. This offering is an attractive prospect for multi-family investors. Great location in downtown Dover, where you can walk to everything, and onsite parking. Dover is one of the fastest growing communities in the US, and the 7th earliest settlement in the US. It is a vibrant city with a population of approximately 30,000 and a catchment area of approx. 100,000 residents. 72 hour notice required for showings, showings restricted to between the hours of 9:30am and 5:00pm Monday through Friday only.