Start with the parcel, not the place name
Johns Island includes properties with different jurisdictions, utility arrangements, association obligations, access patterns, and site conditions. CTAR reports it as MLS Area 23. The island has an Urban Growth Boundary: the City of Charleston will only annex Johns Island parcels that City Council approves, that are adjacent to city limits, and that sit on the city side of the boundary. Annexation questions go to City Planning & Preservation at 843-577-1686.
Roughly 80 percent is outside the growth boundary
The Lowcountry Land Trust, a private nonprofit, says about 80 percent of the island lies outside the Urban Growth Boundary and about 8 percent is protected by easements.
Water and sewer are separate questions
St. John’s Water Company, a private nonprofit, supplies drinking water to both city and county parts of the island and buys it from Charleston Water System. It provides no wastewater service; it refers customers to Charleston Water System or the Seabrook Island Utility Commission.
Septic needs a site evaluation
S.C. DES permits septic systems through its ePermitting system after a site and soil evaluation. If a property is on septic, request permits and records for it.
The Mark Clark Extension is off the table
ABC News 4 reported that voters rejected the referendum at 61.4 percent in late 2024 and the state pulled $75 million on December 2, 2024.
Roads and projects on the island
- US 17 and Main Road interchange. Charleston County Public Works is running the project with 2016 sales-tax funds, and a February 2026 update reported final completion in 2028.
- Maybank Highway. Live 5 News reported a widening near the river intersection at about $10 million, jointly funded by the City and County, expected to start in early 2027 and finish in fall 2027.
- Bohicket Road. A May 2024 news report described a preferred plan to widen the road between Main Road and River Road with construction anticipated in 2026. Confirm current status with the county.
- New parks. The county acquired a 66-acre park site on Simmons Creek in 2025, and public opening was described as more than five years away.
Confirm jurisdiction and intended work
Use the parcel record to identify the governing jurisdiction before directing zoning, permit, renovation, rental, or intended-use questions to an office. Request the county’s current density and overlay rules for the parcel, and ask for the flood zone and the applicable freeboard requirement.
The market at a glance
| Measure | What CTAR reported |
|---|---|
| Closed sales, trailing 12 months | 788 (about 66 a month; 70 in August 2026) |
| August 2026 median sold price | $633,250 (based on 70 sales) |
| Range of monthly median sold prices | $572,500 (Dec 2025) to $709,990 (May 2026) |
| Active listings | 237 in August 2026, compared with 222 in September 2025 |
| Median list price of active listings, August 2026 | $689,999 |
| Average days on market | 40.7 in August 2026; monthly range 29.7 to 74.3 |
| Active listings compared with typical monthly closings | about 3.6 months (EVO arithmetic from the figures above) |
Source: CTAR MLS statistics; MLS Area 23, property type residential; detached and attached sales are combined. Monthly medians move with the mix of homes that sold, so treat any single month as a signal, not a value. Not an appraisal or price opinion for any property.
CTAR’s August 2026 year-to-date local market update for Johns Island reported 467 detached closed sales with a $725,000 median sales price and 48 days on market, and 93 townhouse-condo closed sales with a $480,000 median and 54 days on market. Detached and attached are reported separately, and medians exclude concessions and down-payment assistance. These are broad-area figures, not the value of any property.
Parks and landmarks
Angel Oak Park at 3688 Angel Oak Road has free admission, with posted hours of Monday to Saturday 9 to 5 and Sunday 1 to 5. Johns Island Park at Hay and Walpole roads has a dog park, disc golf, tennis courts, and athletic fields. Confirm hours before visiting.
Schools
Johns Island is served by the Charleston County School District. Attendance follows the address, so confirm it with the district.
Questions to answer before you choose
- Is the parcel inside or outside the Urban Growth Boundary, and in the City or the county?
- Who provides sewer, or is the property on septic?
- What are the flood zone and the applicable freeboard?
- How close is the parcel to the Main Road, Maybank, or Bohicket Road work?
- What association documents, dues, and restrictions apply?
Common questions
Does Johns Island have city water and sewer?
Water is supplied by St. John’s Water Company, which buys it from Charleston Water System. It does not provide wastewater service, so sewer or septic depends on the address.
Can a Johns Island parcel be annexed into the City of Charleston?
Only if it is adjacent to city limits, on the city side of the Urban Growth Boundary, and approved by City Council.
Will the I-526 extension come to Johns Island?
Voters rejected the referendum in late 2024 and the funding was pulled, per ABC News 4. Ask the county for any newer developments.