Charleston Home Addition Permits 2026
Charleston home addition permit fees, plan review, and required inspections for 2026.
Charleston Home Addition permit basics
- Building department: City of Charleston Department of Planning, Permitting, and Engineering, Permit Center
- Department URL: https://www.charleston-sc.gov/856/Permit-Center
- Permit fee typical: $400 - $3,500 permit fee
- Plan review + approval: commonly 3 to 7 business days, longer for historic-district review
- Inspections required: 6-12 inspections (footing, framing, electrical, plumbing, mechanical, insulation, drywall, final)
Charleston Home Addition common issues
Setback compliance, FAR (floor-area ratio), structural review required, sewer/water capacity may need upgrade.
Charleston-specific permitting context
Charleston contractors register through the Customer Self Service portal to apply for permits and schedule inspections, and work in the historic district requires Board of Architectural Review approval before permits issue. Flood-zone elevation, hurricane wind ratings, and tidal-flooding rules add layers most inland markets never see.
Climate factors: A humid subtropical coastal climate with hot humid summers, a June-to-November hurricane season, and salt air plus tidal flooding that demand elevation, corrosion resistance, and wind-rated construction.
South Carolina licensing for Home Addition contractors
South Carolina Department of Labor, Licensing and Regulation (LLR) - required: $135 (residential builder, RBL); GC and BCM also available. Board: https://llr.sc.gov.
Mechanics lien deadline in South Carolina: 90 days from last work. Preliminary notice: Notice of Furnishing required for subs.
Charleston Home Addition sales tax
South Carolina sales tax: 6% + local (~7.4% combined avg). Real property labor exempt. Local sales tax varies by county.
Verify with the South Carolina Department of Revenue.
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