Attic Insulation cost: Columbia vs Sumter (2026)
In 2026, attic insulation is about 1% more expensive in Columbia than in Sumter. Most homeowners pay around $3,700 in Columbia versus $3,650 in Sumter — a gap of roughly $50.
Columbia SC
Typically around $3,700
Sumter SC
Lower costTypically around $3,650
Columbia vs Sumter: full breakdown
| Factor | Columbia | Sumter |
|---|---|---|
| Typical 2026 cost | $3,700 | $3,650 |
| Estimated range | $1,450–$5,900 | $1,450–$5,800 |
| Labor index (vs US) | ×0.96 | ×0.95 |
| Climate zone | Hot | Hot |
| Climate factor | ×1.02 | ×1.02 |
| Local permit | None | None |
| Labor share | $2,050 | $2,000 |
| Materials/equipment | $1,650 | $1,650 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national attic insulation range for local labor, climate and permits.
Columbia vs Sumter
Is attic insulation cheaper in Columbia or Sumter?
In 2026, attic insulation is cheaper in Sumter at about $3,650, versus $3,700 in Columbia — a difference of about $50 (1%).
Why does attic insulation cost more in Columbia than Sumter?
The main driver is local labor rates: Columbia's labor index is 0.96 versus 0.95 in Sumter. Climate zone (hot vs hot) also shift the total.
How much is attic insulation in Columbia, SC?
In Columbia, attic insulation typically runs $1,450–$5,900 in 2026, with most homeowners paying around $3,700.
Updated June 2026 · By Costadia Editorial