Homes under $400K in Castlerock, WA

5 homes for sale · Updated August 12, 2026

• 173 riverview drive, Castlerock 98611 $265,000 · 2 bd · 1 ba · 960 sqft
• 535 diane street, Castlerock 98611 $339,900 · 3 bd · 1 ba · 1,008 sqft
• 173 pioneer avenue, Castlerock 98611 $335,000 · 2 bd · 1 ba · 1,160 sqft
• 716 woodard avenue, Castlerock 98611 $375,000 · 3 bd · 2 ba · 1,252 sqft
• 127 pioneer avenue northeast, Castlerock 98611 $399,900 · 4 bd · 2 ba · 1,568 sqft