Median Fourplex Cost: $847,000

Population: 1,608,139

Median Fourplex Cost: $439,000

Population: 542,629

Median Fourplex Cost: $506,250

Population: 504,258

Median Fourplex Cost: $1,049,950

Population: 275,987

Median Fourplex Cost: $774,990

Population: 267,918

Median Fourplex Cost: $695,000

Population: 248,325

Median Fourplex Cost: $1,148,333

Population: 241,361