Seabrook Island Seabrook Island currently has 141 properties for sale listed on MLS. Seabrook Island has an average sq foot of 2,197. All the MLS Listings in Seabrook Island totaling 141, are priced from $29,950 to $2,900,000 with an average median home for sale priced around $638,037. The highest square foot 998 to the lowest at 1,000.
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