Real Estate Listings For Sale 29920 zip code SC MLS Listings Data: 29920Total Listings:19Average Price:$532,026Highest Listing Price:$2,950,000Average Days On Market:213 Homes For Sale 29920 zip code Saint Helena Island SC. MLS real estate listings for sale in SC by price, street, age, subdivision, neighborhood, list date, bedrooms & more SC zip code 29920. Currently, Saint Helena Island SC 29920 has a total of nineteen listings on the local MLS for sale with an average price point of $$532,026, the max being $$2,950,000 and the lowest priced house $$45,000 to purchase in the 29920 zip code. Homes in the Saint Helena Island SC 29920 have an average house size of 1,328 sq ft and the average days on the market in zip code 29920 is 213 days. Please contact our team to list or sell your home, view or make an offer on one of the properties you see here updated every 5 mins in real-time. RelativeSort by Year Built: low to highSort by Year Built: high to lowSort by price: low to highSort by price: high to lowSort from oldest to newestSort from newest to oldestSort by status: active to under contractSort by status: under contract to active Filters Saving Subscribe Unsubscribe Switch to Grid View Switch to Map View Loading...