Attic Insulation cost: Dover vs Wilmington (2026)
In 2026, attic insulation is about 7% less expensive in Dover than in Wilmington. Most homeowners pay around $3,650 in Dover versus $3,900 in Wilmington — a gap of roughly $250.
Dover DE
Lower costTypically around $3,650
Wilmington DE
Typically around $3,900
Dover vs Wilmington: full breakdown
| Factor | Dover | Wilmington |
|---|---|---|
| Typical 2026 cost | $3,650 | $3,900 |
| Estimated range | $1,450–$5,850 | $1,550–$6,250 |
| Labor index (vs US) | ×0.97 | ×1.04 |
| Climate zone | Mixed | Mixed |
| Climate factor | ×1 | ×1 |
| Local permit | None | None |
| Labor share | $2,000 | $2,150 |
| Materials/equipment | $1,650 | $1,750 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national attic insulation range for local labor, climate and permits.
Dover vs Wilmington
Is attic insulation cheaper in Dover or Wilmington?
In 2026, attic insulation is cheaper in Dover at about $3,650, versus $3,900 in Wilmington — a difference of about $250 (7%).
Why does attic insulation cost more in Wilmington than Dover?
The main driver is local labor rates: Wilmington's labor index is 1.04 versus 0.97 in Dover. Climate zone (mixed vs mixed) also shift the total.
How much is attic insulation in Dover, DE?
In Dover, attic insulation typically runs $1,450–$5,850 in 2026, with most homeowners paying around $3,650.
Updated June 2026 · By Costadia Editorial