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Featured local agent — Sullivan's Island, SC
Sarah Mitchell
Compass Real Estate · Sullivan's Island, SC
“Your trusted relocation specialist since 2009. 350+ homes sold. Zero-pressure, data-first approach.”
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Sullivan's Island, SC Housing Market
The last median sale price Redfin published was $9.35M, +75.6% year over year (through May 2026). With 14.0 months of supply and homes going under contract in about 274 days, Sullivan's Island is a buyer's market. At today's 7.03% 30-year fixed rate, 20% down on a $9.35M home is about $49,915/mo in principal and interest.
Key numbers for Sullivan's Island, SC
Median sale price
$9.35M
+75.6% year over year
Redfin, through February 2026
Days on market
274
Slow-moving
Redfin, through February 2026
Active listings
28
14.0 months of supply
Redfin, through February 2026
30-yr fixed rate
7.03%
Freddie Mac weekly average
Freddie Mac via FRED, September 2026
Median household income
$179,614
Home costs 52.1x income
U.S. Census ACS, 2023
Sale-to-list ratio
94.5%
Selling below asking
Redfin, through February 2026
Zillow figures refresh monthly. Redfin figures are through May 2026 — Redfin stopped publishing its public market trackers in June 2026, so those numbers are final, not current. Mortgage rates come from Freddie Mac via FRED and update weekly.
Is Sullivan's Island a buyer's or seller's market?
Sullivan's Island, SC is a buyer's market, based on 14.0 months of supply and homes selling in about 274 days. Above 7 months of supply is a glut: inventory is well ahead of the sales pace, and buyers can take time to inspect, compare, and negotiate concessions.
Inputs are Redfin's final published period (May 2026). How we classify markets · Where the data comes from
What does the Sullivan's Island housing market data show?
Every row below is Redfin's final published month for Sullivan's Island, SC. Redfin, through February 2026
| Metric | Value |
|---|---|
| Median sale price | $9.35M |
| Median list price | $4.55M |
| Year-over-year price change | +75.6% |
| Median days on market | 274 days |
| Active inventory | 28 listings |
| Months of supply | 14.0 months |
| Sale-to-list price ratio | 94.5% |
| Homes sold (that month) | 2 |
| New listings (that month) | 1 |
| Listings with a price cut | 10.7% |
| Market condition | Buyer's market |
How to read these numbers
- Median sale price
- Half the homes that closed sold for more than this, half for less. It moves with what kind of home sold that month, so a quiet month with two big sales can swing it. Redfin's figure for Sullivan's Island is frozen at May 2026.
- Typical home value (ZHVI)
- Zillow's estimate of what a mid-market home in Sullivan's Island is worth right now, whether or not it sold. It is smoother than the median sale price and it still refreshes monthly, which is why this page leads with it.
- Months of supply
- How long it would take to sell every active listing at the current pace. Under 3 favors sellers, over 6 favors buyers, and 3 to 6 is the balanced band.
- Days on market
- Median time from listing to accepted offer. Short means you should have financing ready before you tour; long means there is room to negotiate on price and repairs.
- Sale-to-list ratio
- Sale price divided by the last asking price. Above 100% means bidding above asking is normal here; below 100% means the typical buyer got a discount.
- Price per square foot
- The size-adjusted price. Use it to compare a 1,400 sq ft house to a 2,600 sq ft house, not to value your own home — lot, condition and age move it a lot.
- Listings with a price cut
- Share of active listings that dropped their asking price in the month. A high share is the earliest visible sign that sellers are ahead of what buyers will pay.
- Typical asking rent (ZORI)
- Zillow's repeat-rent index for asking rents on new leases. Paired with the home value it gives the price-to-rent ratio in the rent-vs-buy section below.
How have Sullivan's Island home prices moved?
Over the last three years the median sale price in Sullivan's Island, SC rose 181.2%, from $3.33M to $9.35M. 10.7% of Sullivan's Island listings cut their asking price in the final Redfin month — a modest share, which is what a market looks like when sellers are pricing close to where homes actually clear. For prices to fall meaningfully from here, supply would have to keep building past 14.0 months while the sale-to-list ratio slips below its current 94.5%. Watch those two together — they move before the median does.
Redfin, through February 2026 — the chart ends at Redfin's final published month.
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What does it cost to buy a home in Sullivan's Island?
Priced off the median sale price of $9.35M at the current 7.03% 30-year fixed rate. These are principal and interest only — property taxes, homeowner's insurance, HOA dues and mortgage insurance are on top, and they vary enough by property that we will not guess them for you.
| Down payment | Cash at close | Loan amount | Monthly P&I |
|---|---|---|---|
| 20% | $1.87M | $7.48M | $49,915/mo |
| 5% | $467,500 | $8.88M | $59,275/mo |
Redfin, through February 2026 for the price · Freddie Mac via FRED, September 2026 for the rate
What income do you need?
Lenders generally want housing costs under 28% of gross income. On the 20%-down payment of $49,915, that implies roughly $2.14M a year before you add taxes and insurance. The median household in Sullivan's Island earns $179,614, about $1.96M short of that threshold — the typical local household needs a larger down payment, a co-borrower, or a home below the median sale price to fit the 28% rule. That puts the price-to-income ratio at 52.1x — well above the 3x that was historically considered affordable, which is why down payment size drives who can buy here.
Run it with your own numbers: affordability calculator · mortgage calculator
Buying in Sullivan's Island in the next 12 months?
Tell us your timeline. We send the Sullivan's Island market brief: the price ranges that actually clear, how long homes sit, and what to fix on your credit before you apply.
Is it cheaper to rent or buy in Sullivan's Island?
Zillow does not publish a rent index (ZORI) for Sullivan's Island, SC, so we cannot compute a price-to-rent ratio here without borrowing a nearby market's rents and calling them local — which we will not do. The rent vs. buy calculator works with a rent figure you supply.
Is inventory rising or falling in Sullivan's Island?
Active listings in Sullivan's Island, SC went from 20 in February 2025 to 28 in February 2026, a +40.0% change. Rising inventory is the single most useful leading indicator for buyers: more choice, longer marketing times, and more sellers willing to negotiate before price cuts show up in the median.
| Month | Active listings | New listings |
|---|---|---|
| March 2025 | 26 | 8 |
| April 2025 | 31 | 9 |
| May 2025 | 29 | 4 |
| June 2025 | 28 | 3 |
| July 2025 | 24 | 4 |
| August 2025 | 21 | 3 |
| September 2025 | 20 | 4 |
| October 2025 | 19 | 1 |
| November 2025 | 23 | 5 |
| December 2025 | 25 | 4 |
| January 2026 | 31 | 9 |
| February 2026 | 28 | 1 |
Redfin, through February 2026
How does Sullivan's Island compare to South Carolina and the U.S.?
Sullivan's Island homes sell for $9.35M — 2273% above the South Carolina median of $394,000. Against the national median of $410,700, Sullivan's Island runs 2177% higher. Year-over-year, Sullivan's Island moved +75.6% against South Carolina's +1.2% — a bigger swing than the state as a whole.
| Market | Median sale price | YoY | Days on market |
|---|---|---|---|
| Sullivan's Island, SC | $9.35M | +75.6% | 274 days |
| South Carolina statewide | $394,000 | +1.2% | 72 days |
| United States | $410,700 | not published | not published |
City and state rows: Redfin, through February 2026 · U.S. row: Freddie Mac via FRED, April 2026 (MSPUS, quarterly)
What to do next in Sullivan's Island
What buyers should watch
- Months of supply, currently 14.0. It turns before price does — when it climbs past 6, sellers start taking offers they would have rejected a quarter earlier.
- The share of listings cutting price, currently 10.7%. A listing that has already cut once is the one most likely to accept below asking.
- The gap between 5% and 20% down here is $9,359 a month in principal and interest alone, before mortgage insurance. That gap, not the price, is usually what decides your timeline.
- Rate moves. At 7.03%, every full point of rate change moves the payment on a $9.35M home more than a 5% price change does.
- Your credit tier before you shop, not after — it sets the rate you are quoted. Run your numbers first.
What sellers should know
- The median Sullivan's Island listing goes under contract in 274 days. If yours passes that mark, the market is telling you the price is wrong — not that you need more showings.
- Homes here close at 94.5% of asking. Price to that ratio from day one rather than chasing the market down in cuts.
- In the last published month Sullivan's Island added 1 new listings against 2 sales — more clearing than arriving, which is the better window to list.
- Comparable ZIP-level pricing inside Sullivan's Island varies more than the citywide median suggests — check the ZIP pages below before you set a number.
Homes for sale in Sullivan's Island
There are currently 28 homes listed for sale in Sullivan's Island, South Carolina. The median listing price is $4.5M.
Active listings
28
Homes on market
Median list price
$4.5M
Avg. days on market
274
Days until sale
New this week
1
Newly listed
Who lives in Sullivan's Island?
American Community Survey estimates for Sullivan's Island. U.S. Census ACS, 2023
Population
2,127
Households
817
Median income
$179,614/yr
Median age
52.9 years
Owner-occupied
84.6%
Median home value
$2.00M
Median gross rent
$2,402/mo
Mean commute
17.3 min
84.6% of occupied homes in Sullivan's Island are owner-occupied, and the rest are rented — which is the share that decides how much of the local housing stock ever reaches the for-sale market.
Which public schools serve Sullivan's Island?
1 schools tracked · 509 students
The largest public schools serving Sullivan's Island, SC by enrollment, drawn from the National Center for Education Statistics. School quality is a commonly cited factor in home-buying decisions — these are the campuses families in this area are most likely to encounter.
Sullivan's Island Elementary
Grades PK-5 · 509 students
Source: National Center for Education Statistics, Common Core of Data directory. Updated annually. Ratings and test scores are not currently displayed.
Which cities are near Sullivan's Island, SC?
Ordered by distance from Sullivan's Island, not by size. Compare Sullivan's Island side by side with any of them.
Sullivan's Island housing market FAQ
Is Sullivan's Island a buyer's or seller's market?
Sullivan's Island, SC is currently a buyer's market. That read comes from 14.0 months of supply, homes going under contract in about 274 days, and sellers getting 94.5% of their asking price in the last month Redfin published (May 2026).
How much do homes cost in Sullivan's Island?
The median sale price in the last month Redfin published was $9.35M.
Is Sullivan's Island cheaper than the rest of South Carolina?
Sullivan's Island's median sale price of $9.35M is 2273% higher than the South Carolina statewide median of $394,000, and 2177% above the U.S. median of $410,700. Both figures are for the same period.
How long do homes take to sell in Sullivan's Island?
Homes in Sullivan's Island, SC spent a median of 274 days on market before going under contract, versus 72 days statewide. Over two months means buyers have time to inspect, compare and negotiate. (Redfin, through May 2026.)
What income do you need to buy a home in Sullivan's Island?
At the current 30-year fixed rate of 7.03%, 20% down on a $9.35M home is about $49,915 a month in principal and interest. Lenders typically want that under 28% of gross income, which works out to roughly $2.14M a year before taxes, insurance, HOA dues or mortgage insurance. The local median household income is $179,614.
Are home prices rising in Sullivan's Island?
Redfin's last published year-over-year change for Sullivan's Island, SC was +75.6%, measured through May 2026. That series is frozen; treat it as a historical reading rather than a current trend.
What are the cheapest ZIP codes in Sullivan's Island?
Sullivan's Island ZIP-level sale prices are not all published for the same period, so ranking them would compare different months. The ZIP pages listed on this page show what we hold for each one individually.
Is now a good time to buy in Sullivan's Island?
That depends on your timeline, not on a headline. What the data says today: Sullivan's Island, SC is a buyer's market with 14.0 months of supply, the 30-year fixed rate is 7.03%. Properties Incorporated publishes the data; it does not give financial advice.
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