Homes under $400K in Seatac, WA

8 homes for sale · Updated August 12, 2026

• 21230 40th way south east, Seatac 98198 $360,000 · 2 bd · 1 ba · 972 sqft
• 4050 south 212th court b, Seatac 98198 $374,950 · 2 bd · 2 ba · 1,146 sqft
• 3515 south 160th street b-5, Seatac 98188 $269,990 · 2 bd · 1 ba · 820 sqft
• 3425 south 176th street 130, Seatac 98188 $285,000 · 2 bd · 2 ba · 1,011 sqft
• 21048 40th place south j-4, Seatac 98198 $319,000 · 1 bd · 1 ba · 802 sqft
• 21250 40th way south b, Seatac 98198 $385,000 · 2 bd · 2 ba · 1,146 sqft
• 14918 32nd place south 20, Seatac 98168 $310,000 · 2 bd · 2 ba · 991 sqft
• 21055 40th place f1, Seatac 98198 $390,000 · 2 bd · 2 ba · 1,007 sqft