Median Fourplex Cost: $800,000

Population: 1,608,139

Median Fourplex Cost: $498,500

Population: 542,629

Median Fourplex Cost: $637,498

Population: 504,258

Median Fourplex Cost: $449,900

Population: 275,987

Median Fourplex Cost: $1,330,000

Population: 267,918

Median Fourplex Cost: $847,450

Population: 248,325

Median Fourplex Cost: $1,120,000

Population: 241,361