At-a-glance
- Hard cost
- $400–$750/sq ft
- Land
- $300K–$3M+ (waterfront and peninsula command premium)
- Permit
- 10–18 weeks (Charleston BAR); 6–10 weeks (Mt Pleasant/counties)
What moves cost here
- Board of Architectural Review (BAR) approval on the peninsula adds 8–16 weeks and constrains materials.
- Elevated finished-floor elevations and pile foundations are typical on marsh, flood-zone, and barrier-island lots.
- Wind, salt, and moisture exposure demand high-durability envelope, cladding, and hardware choices.
Site considerations
- OCRM (state) permits are required for docks, seawalls, and any marsh disturbance.
- Termite pretreatment and long-term bond are standard; borate-treated framing is common upgrade.
- Historic preservation covenants on peninsula lots restrict window styles, siding, and roof pitch.
Plan your Charleston build
Turn these local realities into a portable spec sheet you can hand to any builder or lender.
Related planning reading
Other markets we cover
Compare cost, land, and permit realities
Ranges reflect 2026 builder quotes for custom-grade work. Calibrated against our content methodology.