Sea Island Preserve Johns Island SC Houses For Sale MLS Listings Data: Sea Island Preserve Total Listings: 19 Average Price: $806,724 Highest Listing Price: $1,077,440 Average Days On Market: 58 Houses For Sale Sea Island Preserve subdivision Johns Island SC. MLS real estate listings for sale in Sea Island Preserve Johns Island SC by price, street, age, list date, bedrooms & more Sea Island Preserve Johns Island SC. Currently, Sea Island Preserve in Johns Island SC has a total of nineteen listings on the local MLS for sale with an average price point of $806,724, the max being $1,077,440 and the lowest priced house $660,000. The neighborhood of Sea Island Preserve subdivision in Johns Island SC has an average house size of 2,773 sq ft and the average days on the market in this community is 58. Relative Sort by Year Built: low to high Sort by Year Built: high to low Sort by price: low to high Sort by price: high to low Sort from oldest to newest Sort from newest to oldest Sort by status: active to under contract Sort by status: under contract to active Saving Subscribe Unsubscribe Loading...