Sullivan's Island housing market
The typical home in Sullivan's Island is worth $4,621,366 according to Zillow, up 7.5% from a year earlier. Homes that sold in Jun–Aug 2026 went for a median $3,597,619 and took a median 147 days to sell. That's based on only 7 sales, so expect these figures to swing month to month. At today's 7.03% 30-year rate, a buyer putting 20% down would pay about $24,671 a month in principal and interest, about 154% of the town's median household income, before taxes and insurance.
* Fewer than 10 sales in the 3-month window; small-sample figures swing a lot. Home value: Zillow Home Value Index. Sales, days on market and supply: Redfin, 3-month rolling. Income, rent and ownership: U.S. Census Bureau ACS 5-year. Payment excludes taxes, insurance, HOA and mortgage insurance.