Dewees Island Dewees Island currently has 10 properties for sale listed on MLS. Dewees Island has an average sq foot of 3,236. All the MLS Listings in Dewees Island totaling 10, are priced from $175,000 to $2,495,000 with an average median home for sale priced around $880,500. The highest square foot 4,602 to the lowest at 2,242.
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