Spray Foam Insulation cost: Charleston vs Columbia (2026)
In 2026, spray foam insulation is about 3% more expensive in Charleston than in Columbia. Most homeowners pay around $3,800 in Charleston versus $3,700 in Columbia — a gap of roughly $100.
Charleston SC
Typically around $3,800
Columbia SC
Lower costTypically around $3,700
Charleston vs Columbia: full breakdown
| Factor | Charleston | Columbia |
|---|---|---|
| Typical 2026 cost | $3,800 | $3,700 |
| Estimated range | $1,500–$6,100 | $1,450–$5,900 |
| Labor index (vs US) | ×0.99 | ×0.96 |
| Climate zone | Hot | Hot |
| Climate factor | ×1.02 | ×1.02 |
| Local permit | None | None |
| Labor share | $2,100 | $2,050 |
| Materials/equipment | $1,700 | $1,650 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national spray foam insulation range for local labor, climate and permits.
Charleston vs Columbia
Is spray foam insulation cheaper in Charleston or Columbia?
In 2026, spray foam insulation is cheaper in Columbia at about $3,700, versus $3,800 in Charleston — a difference of about $100 (3%).
Why does spray foam insulation cost more in Charleston than Columbia?
The main driver is local labor rates: Charleston's labor index is 0.99 versus 0.96 in Columbia. Climate zone (hot vs hot) also shift the total.
How much is spray foam insulation in Charleston, SC?
In Charleston, spray foam insulation typically runs $1,500–$6,100 in 2026, with most homeowners paying around $3,800.
Updated June 2026 · By Costadia Editorial